I have used a stock and upgraded Dynaco ST-35 on my Quads and the amp is a great match. I have liked all EL84/6BQ5 based amps on the Quads, they are always...
... Thanks Stephen! Unfortunately that seems to mean that the problem is yet somewhere else. But something *is* wrong -- yesterday, I played around with the 44...
Hello! R. Brezins of Holland got oscillation with OPA604 on the Tape cards. He used OPA134 instead and the problem was gone. Doesn't the spec sheet of the...
... Hi Tom, I've used OPA604 everywhere but the tape card buffers (still 071) and phono card (OPA627). Actually, I've used 0.1uF caps on the input cards and...
Hello! The small caps are only to filter out crap from the PSU lines, as the OPAs are more sensitive. No harm in having them there. Maybe you can trace the...
... I haven't got a 'scope, unfortunately. If it tells you anything, I have seen some relatively huge AC spikes (6V or so) over the main filter caps when the...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the quadhifi group. File : /Q44 Service...
quadhifi@yahoogroups....
Feb 2, 2006 7:29 pm
5744
... Thanks Tom!! I think this is a very useful document, even though the user's manual already contains the circuit diagrams. Thanks again for your trouble! ...
Gentelman, I would like to use 99 CD for my diy project. Do you know the quadlink topology? It requires external power suplies for the DAC and transport right?...
I did think about doing this myself a couple of years ago. All I can remember is that it needs a +35v supply. I tried to find my diagram but couldn't. Good...
It's quite simple if you have that part of the service manual :) send me an e-mail. Anyway, what's the point of having AD845 opamps on the output, when the so...
News from John Bell posted on the Yahoo! Spendor group... Dave. ... From: spendor@yahoogroups.com [mailto:spendor@yahoogroups.com] On Behalf Of John Bell Sent:...
Hello everybody, I am just a new kid on the block. It is also my interest and delight to own a piece of Quad hifi equipment, be it preamp, power amp or ESL. At...
Hello: I have to say I am the rather pleased owner of a Quad QC24 preamp,along with the new ll 40 monoblocks. I had the preamp "upgraded" prior to having it...
Hello Rick, I am in total agreement with you on the performance of Quad premap, I have no doubt about the musicality of Quad. Just because I have been building...
I don't have direct experience of the 24, but, FWIW I believe that if a circuit is well designed and implemented, then component changes will make very little...
... slight flicker. ... Finland. :( ... member ... behave if ... input in ... even ... then I ... board. ... Resently I repaired a Quad 44 with that problem. ...
I've been looking at the Bristol Show website (http://www.bristolshow.co.uk/) and it looks like there will be a lot to hear and see for everyone - based on...
It is a well known fact that Radford STA15 is a good matching amplifier for Quad ESL. Does anyone have the experience in comparing the sound signature between...
I found the Radford brighter and harder than the Quad II. By the same token I find the Leak TL12s (and also the Heathkit MA-12) both a little 'softer' than the...
Parts are not expensive (relatively speaking). If you're handy with a soldering iron, why not work your way round the circuit following other people's good ...
I recently repaired a 34 preamp that had input selector problems for a friend. The culprit, if I remember correctly, was a dodgy CMOS 4013 flip flop which...
I've got a pair of ESL57's for sale, very early serial numbers but both extensively rebuilt (by me). Work completed included new EHT blocks, audio transformer...
... token I ... little 'softer' than ... Assuming that the Leak TL12 is the original - then, assuming that my Leak TL10 sound similar then I'd agree. However,...
Hi Frank. In a sort of a way I agree with you. I have a stacked pair of Quads as well as a single pair. I run the single pair with a pair of IIs, and the...
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