Output transformers ? sound quality ?

richwalters · 18th October 2007, 05:07 PM

I'm on the hunt for good quality p-p makes. Price obviously reflected, but welcome input opinions.
Sowter types are common....who's using'em and..what about other vendors good & bad ??

richj

Brett · 18th October 2007, 05:15 PM

I've been using mainly Lundahl stuff for a few years. It's excellent at reasonable prices.

Tweeker · 18th October 2007, 06:03 PM

A lot of people like the Dyna Clones Triode Electronics offers for budget iron. Especialy the Z565 model. It may not be so economic on that side of the pond though.

richwalters · 18th October 2007, 06:45 PM

Quote:

Originally posted by Tweeker
A lot of people like the Dyna Clones It may not be so economic on that side of the pond though.

I missed the Dyna on the triode site...The 451 suits my application nicely. For sure, the postage will cost more than the transformer. Since it isn't my money = tough.

Taa.

richj

Tweeker · 18th October 2007, 06:59 PM

I'm afraid I dont see a 451 clone on offer by Triode Electronics. Closest I see to it is 431.

richwalters · 18th October 2007, 07:21 PM

Quote:

Originally posted by Tweeker
Closest I see to it is 431.

I was hasty with my enthusiam...youre' quite right. thanks

richj

EC8010 · 18th October 2007, 07:40 PM

Transformer design still seems to be a bit of an art. Some Sowters are excellent, some less so. People generally consider Hammond to be, how shall we say, economy? Yet I thought the measured performance of one of their 1608 transformers was excellent.

Andy Bartha · 18th October 2007, 07:59 PM

Check out the Silk Transformers at www.sacthailand.com. The are very good sounding well made at reasonable cost.

Ty_Bower · 18th October 2007, 08:16 PM

Quote:

Originally posted by EC8010
Transformer design still seems to be a bit of an art. Some Sowters are excellent, some less so. People generally consider Hammond to be, how shall we say, economy? Yet I thought the measured performance of one of their 1608 transformers was excellent.

I've got a Hammond 1620. While perfectly serviceable, I've recently discovered it does not seem to compare to a Dynaco Z565. I'm still in the testing stage, hopeful that perhaps I have a correctable flaw in the design or a faulty tube.

On the positive side, the Hammond cost me less than half the price of a Z565. For the most part, the Hammond sounds just fine.

Tweeker · 18th October 2007, 08:18 PM

Plitron offers fancy high end toroidal PP iron to 400 watts. PAT-4146-00 may be close to what your looking for. Not cheap.

PAT 4146-00 Application: EL34 150 W
This 150 Watt high power Push Pull output transformer,with a primary impedance of 2.2 kOhms and a secondary impedance of 8 Ohms with center tap (cathode feedback) and with 43 % Utra Linear taps, is intended for six EL34 or KT66 or 6L6 tubes at moderately high voltages (between 350 and 450 Volts). The -3dB (1 watt) bandwidth is from 0.6Hz to 118 kHz while the -3dB power bandwidth starts at 15 Hz, allowing this transformer to be used in applications where full and strong bass response is essential.

http://www.plitron.com/shopping/specs/414600.pdf

PAT 4147 might work if you dont need UL, is much cheaper.

18th October 2007, 05:07 PM	#1
richwalters diyAudio Member Join Date: Sep 2003 Location: Alps:Tube amp designs over 150W, SMPS guru.	Output transformers ? sound quality ? I'm on the hunt for good quality p-p makes. Price obviously reflected, but welcome input opinions. Sowter types are common....who's using'em and..what about other vendors good & bad ?? richj

18th October 2007, 06:03 PM	#3
Tweeker diyAudio Member Join Date: Dec 2004 Location: Cincinnati, Ohio	A lot of people like the Dyna Clones Triode Electronics offers for budget iron. Especialy the Z565 model. It may not be so economic on that side of the pond though. __________________ Be sure your foil hat has a good low impedance ground.

18th October 2007, 06:59 PM	#5
Tweeker diyAudio Member Join Date: Dec 2004 Location: Cincinnati, Ohio	I'm afraid I dont see a 451 clone on offer by Triode Electronics. Closest I see to it is 431. __________________ Be sure your foil hat has a good low impedance ground.

18th October 2007, 07:40 PM	#7
EC8010 diyAudio Moderator Emeritus Join Date: Jan 2003 Location: Near London. UK	Transformer design still seems to be a bit of an art. Some Sowters are excellent, some less so. People generally consider Hammond to be, how shall we say, economy? Yet I thought the measured performance of one of their 1608 transformers was excellent. __________________ The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...

18th October 2007, 08:18 PM	#10
Tweeker diyAudio Member Join Date: Dec 2004 Location: Cincinnati, Ohio	Plitron offers fancy high end toroidal PP iron to 400 watts. PAT-4146-00 may be close to what your looking for. Not cheap. PAT 4146-00 Application: EL34 150 W This 150 Watt high power Push Pull output transformer,with a primary impedance of 2.2 kOhms and a secondary impedance of 8 Ohms with center tap (cathode feedback) and with 43 % Utra Linear taps, is intended for six EL34 or KT66 or 6L6 tubes at moderately high voltages (between 350 and 450 Volts). The -3dB (1 watt) bandwidth is from 0.6Hz to 118 kHz while the -3dB power bandwidth starts at 15 Hz, allowing this transformer to be used in applications where full and strong bass response is essential. http://www.plitron.com/shopping/specs/414600.pdf PAT 4147 might work if you dont need UL, is much cheaper. __________________ Be sure your foil hat has a good low impedance ground.


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18th October 2007, 05:15 PM	#2
Brett diyAudio Member Join Date: Jan 2002	I've been using mainly Lundahl stuff for a few years. It's excellent at reasonable prices.

18th October 2007, 07:59 PM	#8
Andy Bartha diyAudio Member Join Date: Sep 2004 Location: Oregon	Check out the Silk Transformers at www.sacthailand.com. The are very good sounding well made at reasonable cost.

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