Hi everyone,

There was on ebay (ebay u,k.) a seller who was offering for sale Quad II main
transformers replacements which I beleive were wound in small quantities in
England. Is this Gentleman a member of this group ? Or do anyone know how to
reach him ? I have bought the remaining material left from a technician who had
a electronic repair shop. Amongs the various pieces I got my hands on were three
(or just about) vintage Quad II amplifiers. All in knock-down form (in parts)
but with only one Main tranformer wired for European voltage. The output
transformer seems to measure OK but are out of their screening cans,one the
screening can along with a chasis has been chromed.

Now I know that Quad german agent is offering replacement parts, but at a price
I can not afford as of now. I may contact Heyboer transformer U.S.A. to find out
if they coud wound replacement transformers in 120 A/C using the sole piece I
have. Tough I do not look forward to unpot this chunk of Tar-diped
transformer...


Or is there anyone needing a replacement main ?



Anyone able to help on that matter ?...
It would be greatly be appreciated

If my memory serves me correct the guy was called 405man.
But (if it was him anyway) at the time he had less then 10 mains cores
available. I have never bought one though.

He is still on ebay it seems.

Good luck,
Jeroen

On 11/12/2009 5:23 PM, mhcormier wrote:
>
>
>
> Hi everyone,
>
> There was on ebay (ebay u,k.) a seller who was offering for sale Quad
> II main transformers replacements which I beleive were wound in small
> quantities in England. Is this Gentleman a member of this group ? Or
> do anyone know how to reach him ? I have bought the remaining material
> left from a technician who had a electronic repair shop. Amongs the
> various pieces I got my hands on were three (or just about) vintage
> Quad II amplifiers. All in knock-down form (in parts) but with only
> one Main tranformer wired for European voltage. The output transformer
> seems to measure OK but are out of their screening cans,one the
> screening can along with a chasis has been chromed.
>
> Now I know that Quad german agent is offering replacement parts, but
> at a price I can not afford as of now. I may contact Heyboer
> transformer U.S.A. to find out if they coud wound replacement
> transformers in 120 A/C using the sole piece I have. Tough I do not
> look forward to unpot this chunk of Tar-diped transformer. ..
>
> Or is there anyone needing a replacement main ?
>
> Anyone able to help on that matter ?...
> It would be greatly be appreciated
>
>

...Humm !

...If it was 405man, I beleive I might have tried to reach him back then. I
think he never got back to me. If he was unable or unwhilling to provide 120 A/C
transformer, he possibly did not bother replying to my inquiery.

I am thinking of posting a picture of this naked output transformer in the
pictures section of this group. It's funny to look at how small this thing is
with its resistor to balanced both primary halves, while still being so good
sounding...

Thank you Jeroen.

--- In quadhifi@yahoogroups.com, Jeroen <esl@...> wrote:
>
> If my memory serves me correct the guy was called 405man.
> But (if it was him anyway) at the time he had less then 10 mains cores
> available. I have never bought one though.
>
> He is still on ebay it seems.
>
> Good luck,
> Jeroen
>
> On 11/12/2009 5:23 PM, mhcormier wrote:
> >
> >
> >
> > Hi everyone,
> >
> > There was on ebay (ebay u,k.) a seller who was offering for sale Quad
> > II main transformers replacements which I beleive were wound in small
> > quantities in England. Is this Gentleman a member of this group ? Or
> > do anyone know how to reach him ? I have bought the remaining material
> > left from a technician who had a electronic repair shop. Amongs the
> > various pieces I got my hands on were three (or just about) vintage
> > Quad II amplifiers. All in knock-down form (in parts) but with only
> > one Main tranformer wired for European voltage. The output transformer
> > seems to measure OK but are out of their screening cans,one the
> > screening can along with a chasis has been chromed.
> >
> > Now I know that Quad german agent is offering replacement parts, but
> > at a price I can not afford as of now. I may contact Heyboer
> > transformer U.S.A. to find out if they coud wound replacement
> > transformers in 120 A/C using the sole piece I have. Tough I do not
> > look forward to unpot this chunk of Tar-diped transformer. ..
> >
> > Or is there anyone needing a replacement main ?
> >
> > Anyone able to help on that matter ?...
> > It would be greatly be appreciated
> >
> >
>

Sowter still sell Quad II mains transformers (and chokes).
http://www.sowter.co.uk/classic-amplifier-transformers.php

Hello Esmond,

They were not able to offer a direct replacement to the original one the last
time I checked on their website. I would like to find a replacement that could
be potted back into the original screening can.

...My leak troughline tuner is still giving some trouble from time to time...If
I ever get tired of fiddling with it I will consider sending it on a voyage to
Australia ... ;-)

Regards.

--- In quadhifi@yahoogroups.com, "ejp286" <esmond.pitt@...> wrote:
>
> Sowter still sell Quad II mains transformers (and chokes).
http://www.sowter.co.uk/classic-amplifier-transformers.php
>

----- Original Message -----

From: mhcormier

To: quadhifi@yahoogroups.com

Sent: Thursday, November 12, 2009 4:23 PM

Subject: [quadhifi] QUAD II Main transformers replacement other than Quad german agent

 

Hi everyone,

There was on ebay (ebay u,k.) a seller who was offering for sale Quad II main transformers replacements which I beleive were wound in small quantities in England. Is this Gentleman a member of this group ? Or do anyone know how to reach him ? I have bought the remaining material left from a technician who had a electronic repair shop. Amongs the various pieces I got my hands on were three (or just about) vintage Quad II amplifiers. All in knock-down form (in parts) but with only one Main tranformer wired for European voltage. The output transformer seems to measure OK but are out of their screening cans,one the screening can along with a chasis has been chromed.

Now I know that Quad german agent is offering replacement parts, but at a price I can not afford as of now. I may contact Heyboer transformer U.S.A. to find out if they coud wound replacement transformers in 120 A/C using the sole piece I have. Tough I do not look forward to unpot this chunk of Tar-diped transformer...

Or is there anyone needing a replacement main ?

Anyone able to help on that matter ?...
It would be greatly be appreciated

----- Original Message -----

From: ejp286

To: quadhifi@yahoogroups.com

Sent: Thursday, November 12, 2009 9:59 PM

Subject: [quadhifi] Re: QUAD II Main transformers replacement other than Quad german agent

 

Sowter still sell Quad II mains transformers (and chokes). http://www.sowter.co.uk/classic-amplifier-transformers.php

Hi Stuart,

Thank you for the information. Do you think you could still ask your supplier if
could wind some 110-120 along somehow. My little knowledge of transformers
construction suggest me that if a set-up was made to wound power transformers
the primary would only need less matterial wound on the core in order to
assemble a 110-120 unit.If he use a cnc machine he could just input what ever
number of turn needed in order to finish a small run with 2 110-120
transformers... (50 to 80 Hz??...humm?) I wonder if it would be much of a
problem ?

The main problem with these transformers when attempting to rewound them seems
to be the availability of the "E&I"core material. The original quad material
size was used before standardization. Metric vs Imperial?
Sowther are not making their core material (I assume) which would explain why 
the transformers they are winding for Quad will not fit in the screening cans.

Regards



--- In quadhifi@yahoogroups.com, "Stuart" <adamson_s@...> wrote:
>
> I have had a number of Quad II mains transformers, 60 at the last count, I
sold a good number on Ebay as 405man. I only had 200-240V ones as I have to
order them in 10s and there was never enough interest in the 110V versions. I
have none left at the moment but hope to get some more wound before the end of
the year. I can offer advice on repotting if required.
>
> Stuart
>
>
>   ----- Original Message -----
>   From: mhcormier
>   To: quadhifi@yahoogroups.com
>   Sent: Thursday, November 12, 2009 4:23 PM
>   Subject: [quadhifi] QUAD II Main transformers replacement other than Quad
german agent
>
>
>
>
>
>   Hi everyone,
>
>   There was on ebay (ebay u,k.) a seller who was offering for sale Quad II
main transformers replacements which I beleive were wound in small quantities in
England. Is this Gentleman a member of this group ? Or do anyone know how to
reach him ? I have bought the remaining material left from a technician who had
a electronic repair shop. Amongs the various pieces I got my hands on were three
(or just about) vintage Quad II amplifiers. All in knock-down form (in parts)
but with only one Main tranformer wired for European voltage. The output
transformer seems to measure OK but are out of their screening cans,one the
screening can along with a chasis has been chromed.
>
>   Now I know that Quad german agent is offering replacement parts, but at a
price I can not afford as of now. I may contact Heyboer transformer U.S.A. to
find out if they coud wound replacement transformers in 120 A/C using the sole
piece I have. Tough I do not look forward to unpot this chunk of Tar-diped
transformer...
>
>   Or is there anyone needing a replacement main ?
>
>   Anyone able to help on that matter ?...
>   It would be greatly be appreciated
>

----- Original Message -----

From: mhcormier

To: quadhifi@yahoogroups.com

Sent: Friday, November 13, 2009 4:48 PM

Subject: [quadhifi] Re: QUAD II Main transformers replacement other than Quad german agent

 

Hi Stuart,

Thank you for the information. Do you think you could still ask your supplier if could wind some 110-120 along somehow. My little knowledge of transformers construction suggest me that if a set-up was made to wound power transformers the primary would only need less matterial wound on the core in order to assemble a 110-120 unit.If he use a cnc machine he could just input what ever number of turn needed in order to finish a small run with 2 110-120 transformers... (50 to 80 Hz??...humm?) I wonder if it would be much of a problem ?

The main problem with these transformers when attempting to rewound them seems to be the availability of the "E&I"core material. The original quad material size was used before standardization. Metric vs Imperial?
Sowther are not making their core material (I assume) which would explain why the transformers they are winding for Quad will not fit in the screening cans.

Regards

--- In quadhifi@yahoogroups.com, "Stuart" <adamson_s@...> wrote:
>
> I have had a number of Quad II mains transformers, 60 at the last count, I sold a good number on Ebay as 405man. I only had 200-240V ones as I have to order them in 10s and there was never enough interest in the 110V versions. I have none left at the moment but hope to get some more wound before the end of the year. I can offer advice on repotting if required.
>
> Stuart
>
>
> ----- Original Message -----
> From: mhcormier
> To: quadhifi@yahoogroups.com
> Sent: Thursday, November 12, 2009 4:23 PM
> Subject: [quadhifi] QUAD II Main transformers replacement other than Quad german agent
>
>
>
>
>
> Hi everyone,
>
> There was on ebay (ebay u,k.) a seller who was offering for sale Quad II main transformers replacements which I beleive were wound in small quantities in England. Is this Gentleman a member of this group ? Or do anyone know how to reach him ? I have bought the remaining material left from a technician who had a electronic repair shop. Amongs the various pieces I got my hands on were three (or just about) vintage Quad II amplifiers. All in knock-down form (in parts) but with only one Main tranformer wired for European voltage. The output transformer seems to measure OK but are out of their screening cans,one the screening can along with a chasis has been chromed.
>
> Now I know that Quad german agent is offering replacement parts, but at a price I can not afford as of now. I may contact Heyboer transformer U.S.A. to find out if they coud wound replacement transformers in 120 A/C using the sole piece I have. Tough I do not look forward to unpot this chunk of Tar-diped transformer...
>
> Or is there anyone needing a replacement main ?
>
> Anyone able to help on that matter ?...
> It would be greatly be appreciated
>

----- Original Message -----

From: Gerry O'Hara

To: quadhifi@yahoogroups.com

Sent: Saturday, November 14, 2009 1:42 AM

Subject: RE: [quadhifi] Re: QUAD II Main transformers replacement other than Quad german agent

 

Why not ask them to wind the primary as two 120v windings – use in series for 240v and parallel for 110v – that way they could produce a single type of transformer for both applications.

Gerry

From: quadhifi@yahoogroups.com [mailto:quadhifi@yahoogroups.com] On Behalf Of Stuart
Sent: February-09-06 2:48 PM
To: quadhifi@yahoogroups.com
Subject: Re: [quadhifi] Re: QUAD II Main transformers replacement other than Quad german agent

 

I shall give them a ring on Monday, I am sure I can get 2 wound but they may be more expensive, I had one prototype wound at the beginning and it was well over 100GBP,

I sold the last lot of 240V ones for 90 GBP but the price may have risen again since my last order.

Stuart

----- Original Message -----

From: mhcormier

To: quadhifi@yahoogroups.com

Sent: Friday, November 13, 2009 4:48 PM

Subject: [quadhifi] Re: QUAD II Main transformers replacement other than Quad german agent

 

Hi Stuart,

Thank you for the information. Do you think you could still ask your supplier if could wind some 110-120 along somehow. My little knowledge of transformers construction suggest me that if a set-up was made to wound power transformers the primary would only need less matterial wound on the core in order to assemble a 110-120 unit.If he use a cnc machine he could just input what ever number of turn needed in order to finish a small run with 2 110-120 transformers... (50 to 80 Hz??...humm?) I wonder if it would be much of a problem ?

The main problem with these transformers when attempting to rewound them seems to be the availability of the "E&I"core material. The original quad material size was used before standardization. Metric vs Imperial?
Sowther are not making their core material (I assume) which would explain why the transformers they are winding for Quad will not fit in the screening cans.

Regards

--- In quadhifi@yahoogroups.com, "Stuart" <adamson_s@...> wrote:
>
> I have had a number of Quad II mains transformers, 60 at the last count, I sold a good number on Ebay as 405man. I only had 200-240V ones as I have to order them in 10s and there was never enough interest in the 110V versions. I have none left at the moment but hope to get some more wound before the end of the year. I can offer advice on repotting if required.
>
> Stuart
>
>
> ----- Original Message -----
> From: mhcormier
> To: quadhifi@yahoogroups.com
> Sent: Thursday, November 12, 2009 4:23 PM
> Subject: [quadhifi] QUAD II Main transformers replacement other than Quad german agent
>
>
>
>
>
> Hi everyone,
>
> There was on ebay (ebay u,k.) a seller who was offering for sale Quad II main transformers replacements which I beleive were wound in small quantities in England. Is this Gentleman a member of this group ? Or do anyone know how to reach him ? I have bought the remaining material left from a technician who had a electronic repair shop. Amongs the various pieces I got my hands on were three (or just about) vintage Quad II amplifiers. All in knock-down form (in parts) but with only one Main tranformer wired for European voltage. The output transformer seems to measure OK but are out of their screening cans,one the screening can along with a chasis has been chromed.
>
> Now I know that Quad german agent is offering replacement parts, but at a price I can not afford as of now. I may contact Heyboer transformer U.S.A. to find out if they coud wound replacement transformers in 120 A/C using the sole piece I have. Tough I do not look forward to unpot this chunk of Tar-diped transformer...
>
> Or is there anyone needing a replacement main ?
>
> Anyone able to help on that matter ?...
> It would be greatly be appreciated
>

Looking for a 0,5 m Quadlink cabel (or thereabouts).
Anyone selling?
Cheers
Thomas

I was a bit surprised by the price of new Quad ones. I've been looking for a
long one for a while, but none located. Just looked at the short one I have,
it's standard computer 15-core flex with standard D-type connectors, and the
connections appear to just be straight through. So unless anyone advises
otherwise I will be making one up. Should cost me about £3.50 instead of £100!

When I think of all the computer leads I've thrown away in the past....


--- In quadhifi@yahoogroups.com, "T" <thomas.loob@...> wrote:
>
> Looking for a 0,5 m Quadlink cabel (or thereabouts).
> Anyone selling?
> Cheers
> Thomas
>

That's why for a bit more than that price I got a custom built quadlink with
audiophile silver wire and hospital-grade quality connectors.

Cheers
Roberto

--- In quadhifi@yahoogroups.com, "dngibson_uk" <dngibson_uk@...> wrote:
>
> I was a bit surprised by the price of new Quad ones. I've been looking for a
long one for a while, but none located. Just looked at the short one I have,
it's standard computer 15-core flex with standard D-type connectors, and the
connections appear to just be straight through. So unless anyone advises
otherwise I will be making one up. Should cost me about �3.50 instead of
�100!
>
> When I think of all the computer leads I've thrown away in the past....
>
>
> --- In quadhifi@yahoogroups.com, "T" <thomas.loob@> wrote:
> >
> > Looking for a 0,5 m Quadlink cabel (or thereabouts).
> > Anyone selling?
> > Cheers
> > Thomas
> >
>

Right!
So having just made one; you need the eyes of a watchmaker, the patience of a
saint, and three hands. And when you look at the tiny wires your precious music
is coming down, it makes the good idea of the 'Quadlink' look a bit less of a
great idea (and I don't get excited by cables). Still, the wonders of the
internet come down something similar!

--- In quadhifi@yahoogroups.com, "robertopisa2" <grossi.roberto@...> wrote:
>
> That's why for a bit more than that price I got a custom built quadlink with
audiophile silver wire and hospital-grade quality connectors.
>
> Cheers
> Roberto
>
> --- In quadhifi@yahoogroups.com, "dngibson_uk" <dngibson_uk@> wrote:
> >
> > I was a bit surprised by the price of new Quad ones. I've been looking for a
long one for a while, but none located. Just looked at the short one I have,
it's standard computer 15-core flex with standard D-type connectors, and the
connections appear to just be straight through. So unless anyone advises
otherwise I will be making one up. Should cost me about �3.50 instead of
�100!
> >
> > When I think of all the computer leads I've thrown away in the past....
> >
> >
> > --- In quadhifi@yahoogroups.com, "T" <thomas.loob@> wrote:
> > >
> > > Looking for a 0,5 m Quadlink cabel (or thereabouts).
> > > Anyone selling?
> > > Cheers
> > > Thomas
> > >
> >
>

I hope the Quad one sounds better. The one I made from an old printer cable
sounds shockingly bad, and I don't make a fuss about cables.
So don't try that one!

--- In quadhifi@yahoogroups.com, "dngibson_uk" <dngibson_uk@...> wrote:
>
> Right!
> So having just made one; you need the eyes of a watchmaker, the patience of a
saint, and three hands. And when you look at the tiny wires your precious music
is coming down, it makes the good idea of the 'Quadlink' look a bit less of a
great idea (and I don't get excited by cables). Still, the wonders of the
internet come down something similar!
>
> --- In quadhifi@yahoogroups.com, "robertopisa2" <grossi.roberto@> wrote:
> >
> > That's why for a bit more than that price I got a custom built quadlink with
audiophile silver wire and hospital-grade quality connectors.
> >
> > Cheers
> > Roberto
> >
> > --- In quadhifi@yahoogroups.com, "dngibson_uk" <dngibson_uk@> wrote:
> > >
> > > I was a bit surprised by the price of new Quad ones. I've been looking for
a long one for a while, but none located. Just looked at the short one I have,
it's standard computer 15-core flex with standard D-type connectors, and the
connections appear to just be straight through. So unless anyone advises
otherwise I will be making one up. Should cost me about �3.50 instead of
�100!
> > >
> > > When I think of all the computer leads I've thrown away in the past....
> > >
> > >
> > > --- In quadhifi@yahoogroups.com, "T" <thomas.loob@> wrote:
> > > >
> > > > Looking for a 0,5 m Quadlink cabel (or thereabouts).
> > > > Anyone selling?
> > > > Cheers
> > > > Thomas
> > > >
> > >
> >
>

Would you ever use an old printer cable for your RCA interconnect cable? I do
not think so... :-)

If I remember will, nine twisted pairs of shielded audiophile cable are needed
to build a custom Quadlink (three pairs for three individual ground pins and the
remaining ones for the twelve signal pins). Signal transmission in Quadlink is
better than RCA since it uses common mode rejection of balanced transmission.

-Roberto

--- In quadhifi@yahoogroups.com, "dngibson_uk" <dngibson_uk@...> wrote:
>
> I hope the Quad one sounds better. The one I made from an old printer cable
sounds shockingly bad, and I don't make a fuss about cables.
> So don't try that one!
>
> --- In quadhifi@yahoogroups.com, "dngibson_uk" <dngibson_uk@> wrote:
> >
> > Right!
> > So having just made one; you need the eyes of a watchmaker, the patience of
a saint, and three hands. And when you look at the tiny wires your precious
music is coming down, it makes the good idea of the 'Quadlink' look a bit less
of a great idea (and I don't get excited by cables). Still, the wonders of the
internet come down something similar!
> >
> > --- In quadhifi@yahoogroups.com, "robertopisa2" <grossi.roberto@> wrote:
> > >
> > > That's why for a bit more than that price I got a custom built quadlink
with audiophile silver wire and hospital-grade quality connectors.
> > >
> > > Cheers
> > > Roberto
> > >
> > > --- In quadhifi@yahoogroups.com, "dngibson_uk" <dngibson_uk@> wrote:
> > > >
> > > > I was a bit surprised by the price of new Quad ones. I've been looking
for a long one for a while, but none located. Just looked at the short one I
have, it's standard computer 15-core flex with standard D-type connectors, and
the connections appear to just be straight through. So unless anyone advises
otherwise I will be making one up. Should cost me about �3.50 instead of
�100!
> > > >
> > > > When I think of all the computer leads I've thrown away in the past....
> > > >
> > > >
> > > > --- In quadhifi@yahoogroups.com, "T" <thomas.loob@> wrote:
> > > > >
> > > > > Looking for a 0,5 m Quadlink cabel (or thereabouts).
> > > > > Anyone selling?
> > > > > Cheers
> > > > > Thomas

Parallel printer cables can range from rudimentary rubbish to quality copper
twisted pairs within foil and braid screen.  The latter relatively substantial
yet surprisingly flexible.

Fred.


--- On Thu, 19/11/09, robertopisa2 <grossi.roberto@...> wrote:

From: robertopisa2 <grossi.roberto@...>
Subject: [quadhifi] Re: 0,5 m Quadlink for sale anyone?
To: quadhifi@yahoogroups.com
Date: Thursday, 19 November, 2009, 21:29

Would you ever use an old printer cable for your RCA interconnect cable? I do
not think so... :-)

If I remember will, nine twisted pairs of shielded audiophile cable are needed
to build a custom Quadlink (three pairs for three individual ground pins and the
remaining ones for the twelve signal pins). Signal transmission in Quadlink is
better than RCA since it uses common mode rejection of balanced transmission.

-Roberto

--- In quadhifi@yahoogroup s.com, "dngibson_uk" <dngibson_uk@ ...> wrote:
>
> I hope the Quad one sounds better. The one I made from an old printer cable
sounds shockingly bad, and I don't make a fuss about cables.
> So don't try that one!
>
> --- In quadhifi@yahoogroup s.com, "dngibson_uk" <dngibson_uk@ > wrote:
> >
> > Right!
> > So having just made one; you need the eyes of a watchmaker, the patience of
a saint, and three hands. And when you look at the tiny wires your precious
music is coming down, it makes the good idea of the 'Quadlink' look a bit less
of a great idea (and I don't get excited by cables). Still, the wonders of the
internet come down something similar!
> >
> > --- In quadhifi@yahoogroup s.com, "robertopisa2" <grossi.roberto@ > wrote:
> > >
> > > That's why for a bit more than that price I got a custom built quadlink
with audiophile silver wire and hospital-grade quality connectors.
> > >
> > > Cheers
> > > Roberto
> > >
> > > --- In quadhifi@yahoogroup s.com, "dngibson_uk" <dngibson_uk@ > wrote:
> > > >
> > > > I was a bit surprised by the price of new Quad ones. I've been looking
for a long one for a while, but none located. Just looked at the short one I
have, it's standard computer 15-core flex with standard D-type connectors, and
the connections appear to just be straight through. So unless anyone advises
otherwise I will be making one up. Should cost me about �3.50 instead of
�100!
> > > >
> > > > When I think of all the computer leads I've thrown away in the past....
> > > >
> > > >
> > > > --- In quadhifi@yahoogroup s.com, "T" <thomas.loob@ > wrote:
> > > > >
> > > > > Looking for a 0,5 m Quadlink cabel (or thereabouts) .
> > > > > Anyone selling?
> > > > > Cheers
> > > > > Thomas

I would like to thank the folks who helped and pointed me in all the different
directions for help. As I stated before I picked up a set of  ESL 57 speakers
that were not up to par when I recieved them. One you could barely hear and the
other had so much distortion you couldnt turn it up hardly any at all. Well
after a through visual inspection I decided to tackle the EHT and audio
transformer and hope for the best with the panels. I asked here and found so
much advise I was able to pick up the parts, dismantle, replace all resistors,
diodes, and caps in both the EHT and audio transformer with out a problem at
all. Basically I just replaced them all as I figured after 30+ years they needed
it anyways. That did it and Im so friggin happy right now you wouldnt believe.
These were fired up a week ago and everytime I sit down they seem to sound even
better. Thanks to all!!!! You guys are great!!!!

good to hear your efforts have been wortwhile. next up try building a pair of
stands ,the improovement is another massive leap for little outlay.
ray
--- In quadhifi@yahoogroups.com, "clebrns1" <clebrns1@...> wrote:
>
>  I would like to thank the folks who helped and pointed me in all the
different directions for help. As I stated before I picked up a set of  ESL 57
speakers that were not up to par when I recieved them. One you could barely hear
and the other had so much distortion you couldnt turn it up hardly any at all.
Well after a through visual inspection I decided to tackle the EHT and audio
transformer and hope for the best with the panels. I asked here and found so
much advise I was able to pick up the parts, dismantle, replace all resistors,
diodes, and caps in both the EHT and audio transformer with out a problem at
all. Basically I just replaced them all as I figured after 30+ years they needed
it anyways. That did it and Im so friggin happy right now you wouldnt believe.
These were fired up a week ago and everytime I sit down they seem to sound even
better. Thanks to all!!!! You guys are great!!!!
>

And as I recall there was something of a craze over CAT-5 wire a few years ago.

Has anybody worked out the pin arrangement for Quadlink cables?
At least with the lead I've made I can experiment to find out what all the wires
do. It seems to me that less than half of the 15 wires will be needed to go from
pre-amp to power amp. It will be much easier to make up something which doesn't
require 15 wires.

Is there a significant audible difference using Quadlink (I've seen numerous
people say there is). But I can find people on the internet telling the world
that black is white!


--- In quadhifi@yahoogroups.com, Fred <glenndriech@...> wrote:
>
>
> Parallel printer cables can range from rudimentary rubbish to quality copper
twisted pairs within foil and braid screen.  The latter relatively substantial
yet surprisingly flexible.
>
> Fred.
>
>
> --- On Thu, 19/11/09, robertopisa2 <grossi.roberto@...> wrote:
>
> From: robertopisa2 <grossi.roberto@...>
> Subject: [quadhifi] Re: 0,5 m Quadlink for sale anyone?
> To: quadhifi@yahoogroups.com
> Date: Thursday, 19 November, 2009, 21:29
>
> Would you ever use an old printer cable for your RCA interconnect cable? I do
not think so... :-)
>
> If I remember will, nine twisted pairs of shielded audiophile cable are needed
to build a custom Quadlink (three pairs for three individual ground pins and the
remaining ones for the twelve signal pins). Signal transmission in Quadlink is
better than RCA since it uses common mode rejection of balanced transmission.
>
> -Roberto
>
> --- In quadhifi@yahoogroup s.com, "dngibson_uk" <dngibson_uk@ ...> wrote:
> >
> > I hope the Quad one sounds better. The one I made from an old printer cable
sounds shockingly bad, and I don't make a fuss about cables.
> > So don't try that one!
> >
> > --- In quadhifi@yahoogroup s.com, "dngibson_uk" <dngibson_uk@ > wrote:
> > >
> > > Right!
> > > So having just made one; you need the eyes of a watchmaker, the patience
of a saint, and three hands. And when you look at the tiny wires your precious
music is coming down, it makes the good idea of the 'Quadlink' look a bit less
of a great idea (and I don't get excited by cables). Still, the wonders of the
internet come down something similar!
> > >
> > > --- In quadhifi@yahoogroup s.com, "robertopisa2" <grossi.roberto@ > wrote:
> > > >
> > > > That's why for a bit more than that price I got a custom built quadlink
with audiophile silver wire and hospital-grade quality connectors.
> > > >
> > > > Cheers
> > > > Roberto
> > > >
> > > > --- In quadhifi@yahoogroup s.com, "dngibson_uk" <dngibson_uk@ > wrote:
> > > > >
> > > > > I was a bit surprised by the price of new Quad ones. I've been looking
for a long one for a while, but none located. Just looked at the short one I
have, it's standard computer 15-core flex with standard D-type connectors, and
the connections appear to just be straight through. So unless anyone advises
otherwise I will be making one up. Should cost me about �3.50 instead of
�100!
> > > > >
> > > > > When I think of all the computer leads I've thrown away in the
past....
> > > > >
> > > > >
> > > > > --- In quadhifi@yahoogroup s.com, "T" <thomas.loob@ > wrote:
> > > > > >
> > > > > > Looking for a 0,5 m Quadlink cabel (or thereabouts) .
> > > > > > Anyone selling?
> > > > > > Cheers
> > > > > > Thomas
>

The cable is described in the schematics for the 99 series.

The Quad 99 user-manual can be downloaded from the Download-section of our
website.

Stefaan
www.dadaelectronics.eu

--- In quadhifi@yahoogroups.com, "Thomas Loob" <thomas.loob@...> wrote:
>
> The cable is described in the schematics for the 99 series.
>

Hi,

i have a quad 303 that has developed a fault. On one channel the symptom was a
buzzing noise that was occasional, but got steadily worse.

It's only on one channel and I have sorted it by swapping the affected main
amplifier board. The boards are modified in net audio mode so the caps have all
been changed and the amplifier is fully complementary. The output transistors
get hot when the buzzing occurs. I have swapped the output cap and it is Ok. The
transistors are now cool after inserting another amplifier unit.

Has anyone any ideas as to what is wrong or how to check the boards for
problems?

Hi,

This sounds like a broken transistor and/or a quiescent current that is much to
high.

You can download the Quad service manual from our website. In the upgrade manual
the procedure for adjusting the quiescent-current is described.

Success!
Stefaan
www.dadaelectronics.eu


--- In quadhifi@yahoogroups.com, "michaelredman" <michaelredman@...> wrote:
>
> Hi,
>
> i have a quad 303 that has developed a fault. On one channel the symptom was a
buzzing noise that was occasional, but got steadily worse.
>
> It's only on one channel and I have sorted it by swapping the affected main
amplifier board. The boards are modified in net audio mode so the caps have all
been changed and the amplifier is fully complementary. The output transistors
get hot when the buzzing occurs. I have swapped the output cap and it is Ok. The
transistors are now cool after inserting another amplifier unit.
>
> Has anyone any ideas as to what is wrong or how to check the boards for
problems?
>

Hi Mike,

The 303 Service Manual is available on the website again.

To check what transistor (or other component) is broken you should check the
different voltages and / or compare them in both channels.

You can also chack the transistors with a multimeter.

If you don't have experience with fault-finding in analog circuits I would send
the board to a technician.

Kind regards,
Stefaan
www.dadaelectronics.eu


--- In quadhifi@yahoogroups.com, mike redman <michaelredman@...> wrote:
>
> thanks Stefaan,
>
> But which transistor and there is no 303 service manual on the site. the
quiescent current was fine.
>
> mike.
>
> --- On Tue, 24/11/09, Stefaan <stefaan.verdonckt@...> wrote:
>
> From: Stefaan <stefaan.verdonckt@...>
> Subject: [quadhifi] Re: Buzzing noise from quad 303 channel
> To: quadhifi@yahoogroups.com
> Date: Tuesday, 24 November, 2009, 14:50
>
>
>
>
>
>
>
>  
>
>
>
>
>
>
>
>
>
>       Hi,
>
>
>
> This sounds like a broken transistor and/or a quiescent current that is much
to high.
>
>
>
> You can download the Quad service manual from our website. In the upgrade
manual the procedure for adjusting the quiescent-current is described.
>
>
>
> Success!
>
> Stefaan
>
> www.dadaelectronics .eu
>
>
>
> --- In quadhifi@yahoogroup s.com, "michaelredman" <michaelredman@ ...> wrote:
>
> >
>
> > Hi,
>
> >
>
> > i have a quad 303 that has developed a fault. On one channel the symptom was
a buzzing noise that was occasional, but got steadily worse.
>
> >
>
> > It's only on one channel and I have sorted it by swapping the affected main
amplifier board. The boards are modified in net audio mode so the caps have all
been changed and the amplifier is fully complementary. The output transistors
get hot when the buzzing occurs. I have swapped the output cap and it is Ok. The
transistors are now cool after inserting another amplifier unit.
>
> >
>
> > Has anyone any ideas as to what is wrong or how to check the boards for
problems?
>
> >
>

The first suspect is C101. Check for dry joints; swap it with the other channel
to see if the fault moves. Then I would look at transistors starting from the
left hand side of the diagram.

As the electrolytes were replaced by Netaudio during the revision C101 should be
OK normally.

Checking the transistors with a transitor-tester is quite easy when the 303 is
upside down. One can compare the "good" and the "bad" channel in an easy way.

Success!

Stefaan
www.dadaelectronics.eu


--- In quadhifi@yahoogroups.com, "ejp286" <esmond.pitt@...> wrote:
>
> The first suspect is C101. Check for dry joints; swap it with the other
channel to see if the fault moves. Then I would look at transistors starting
from the left hand side of the diagram.
>