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Toroidal transformer source   Message List  
Reply | Forward Message #1757 of 1768 |
Re: [diy_audio_tweaks] Re: Toroidal transformer source

Hi Ray,

Other than the occasional Chinglish in the PDF files, those AnTeks looked very interesting... and that was before gazing at the price list.  Even the big bad boys are priced quite reasonably.  Did notice that some models offer multiple secondary windings - might have been useful for the meters in your project.  I keep a few of the [maybe now dated] telco wall-warts (snared in building or office clean-outs) in the parts bin as handy sources for low-VA applications like that... as opposed to the consumer grade units, they don't seem to get very warm in normal use.

The Sony is in service as I type, flip'n back-n-forth between it and its new HD sibling.  Haven't even popped the lid, no real reason to - worked admirably straight away.  It arrived in very questionable package (original retail box with just a few peanuts added)  but survived w/o overt damage.  That's goodness 'cause this is a real looker with those dark wood side panels.  I think this has some of the nicest ergonomics of the tuner collection... I especially like the ability to code-in the 4-character station id for each preset and the antenna attenuator switch that's also memorized by the presets.  My two favorite sounding stock tuners, Nikko GammaV and Sansui TU-9900, have yet to be bested for listening comfort.  But for signal grabbing and delivering stations as listenable, all the Sonys excel as does the KT-880D (sshhhh, a real performer for, now, robinfeed).  Given a reasonable signal, the ST-S550ES is more enjoyable to listen to than its amazing, diminutive HD sibling, but can not sort-out the real tough situations nearly as well.  The ST-S550ES does have one unexpected behavior; there's a low power college station about 35mi out that shows about 4-5 bars on the signal meter with good stereo lock and quite a bit of background whitenoise.  When I engage the antenna attenuator the signal drops that to 2 bars -- but the whitenoise is almost eliminated, the stereo lock continues and the station is suddenly much more enjoyable.  This seems a bit upside down and I suspect there's more than attenuation happening when the switch is engaged.

Cheers,
LarryO


At 05:44 AM 8/20/2008, you wrote:

Hi Larry,
Last night I completed wedging an Antek AN3230 into a Toshiba SC-
665 power amp. Perfect but tight fit. Original power check put it at
68wpc both at 8 Ohm and 70wpc both at 4 Ohm. Obviously the original
toroidal was current starved. The rail voltages would drop
tremendously with applied loads. The Antek put it at 65wpc both at 8
Ohm and 95wpc both at 4 Ohm. Much better regulation and current
delivery. If I could do it over, but I won't, I'd have used the
AN3232 to get a bit more power. Cost? $36 + $10 USPS priority. I also
had to add a 12.6vac, 300ma R.S. transformer and a dropping diode to
keep the meters lit.
BTW, I'm curious....how did you like your sparrow feed Sony?
Ain't this stuff fun?
RFM-


Wed Aug 20, 2008 4:41 pm

lgo51
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Message #1757 of 1768 |
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Hello tweakers, RFM has come across, and twice successfully used, a very economical source for new toroidal power transformers. The brand is Antek and their...
Ray McDonald
stereomacyh
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Aug 19, 2008
7:44 pm

...more fun now :) Thanks, Ray...
Larry Owens
lgo51
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Aug 19, 2008
8:11 pm

Hi Larry, Last night I completed wedging an Antek AN3230 into a Toshiba SC- 665 power amp. Perfect but tight fit. Original power check put it at 68wpc both at...
Ray McDonald
stereomacyh
Offline Send Email
Aug 20, 2008
11:45 am

Hi Ray, Other than the occasional Chinglish in the PDF files, those AnTeks looked very interesting... and that was before gazing at the price list. Even the...
Larry Owens
lgo51
Offline Send Email
Aug 20, 2008
4:41 pm

Hi Everyone... I received a Martel FAX-150 receiver, circa 60's from a client. The unit has several parts removed and obviously isn't functional. Does anyone...
ABSL-Groups
techbear_mn
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Nov 13, 2009
3:23 pm

Hi Mark, I have a Martel FAX-150 receiver that is available for purchase (although I don't have a schematic). Please contact me if you are interested. Best...
Barry Kohan
barryabko
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Nov 13, 2009
9:06 pm
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