"Best" toroidal transformer.

Colescuttle · 14th September 2006, 09:15 PM

My plans to purchase Plitron transformers got sidetracked by a dog who hid my wallet and credit cards under the bed. However, in the interim, I googled "toroidal"and discovered a surprising number of manufacturers and distributers, many of whom keep stock on hand (Plitrons must be wound to order and take five weeks or so.)

Is there a really a consensus that Plitrons are the best and are worth both the wait and the freight? Both "Toroid of Maryland" and "Avel Lindberg" seem to to be less pricey and more readily available.

Thanks.

herm · 14th September 2006, 10:25 PM

I don't know about best, but certainly in stock and available...

http://www.partsexpress.com/webpage....up_ID=605&SO=2

herm

traw · 15th September 2006, 01:59 PM

i liked some potted amveco's i'd picked up off ebay. very good.

had plitron, didn't seem extrordinary. good but not sure if worth hassle.

i like hammonds - various distributers. picked up some 'old' mesh wrapped ones off ebay. hefty and silent.

the avel lindbergs easy to get from parts express... but i know the 800va 50x2 one i got for rod elliot p101. didn't need that much va, but only capacity in that voltage, with single transformer. it has a heavy mechanical hum. not too bad. also had 625 25x2 that i could feel... work well.

i've had good luck with 'antek' (on ebay, parmetal related). wide variety of sizes. have had a 400va 23x2 and 800 30x2 from them and a 400va 20x2 coming. i prefer these over the ones from parts express.

widman · 15th September 2006, 02:06 PM

I have used an Avel-Lindberg 330VA-25V from PE and never experienced any hum or buzz. It has been working well in my Chipamp.com kit for a couple of years now.

pete

traw · 15th September 2006, 02:07 PM

if all out no holds barred, go ahead get plitron. peace of mind is a good thing.

traw · 15th September 2006, 02:09 PM

yeah.... i think it'se just that i have a 800va and other capacities just fine. haven't tinkered with pads to see if i can soften it. plus mounted on substantial sheet metal that could amplify/resonate

BrianDonegan · 15th September 2006, 02:27 PM

It could be that the large core of the 800VA trafo is exaggerating an issue with your AC inout, such as DC on the line or a bad neutral. I would be curious to see if another large VA-rated trafo would do the same thing (different source).

I have good luck (no problems) with all the brands mentioned above, except Philtron. Just haven't had the time or $$ to try them.

bikehorn · 15th September 2006, 10:39 PM

lately Plitron has been selling a high-end line of toroids for SS audio....the LoNo line. they have 4 secondaries, come potted in a black metal can and supposedly have lower inrush than a regular toroidal transformer. looks sweet... very very expensive though. a 500VA transformer was $305 canadian.

AndrewT · 16th September 2006, 09:45 AM

Hi,
I would like to hear/see an unbiased comparison for an amp powered by a high end audio targetted transformer and a well made conventional toroidal transformer.

Colescuttle · 17th September 2006, 05:49 PM

Could you post me offline at "george_cole*bellsouth.net."

14th September 2006, 09:15 PM	#1
Colescuttle diyAudio Member Join Date: Sep 2006	"Best" toroidal transformer. My plans to purchase Plitron transformers got sidetracked by a dog who hid my wallet and credit cards under the bed. However, in the interim, I googled "toroidal"and discovered a surprising number of manufacturers and distributers, many of whom keep stock on hand (Plitrons must be wound to order and take five weeks or so.) Is there a really a consensus that Plitrons are the best and are worth both the wait and the freight? Both "Toroid of Maryland" and "Avel Lindberg" seem to to be less pricey and more readily available. Thanks.

15th September 2006, 02:27 PM	#7
BrianDonegan diyAudio Member Join Date: Dec 2004 Location: Rock Ridge	It could be that the large core of the 800VA trafo is exaggerating an issue with your AC inout, such as DC on the line or a bad neutral. I would be curious to see if another large VA-rated trafo would do the same thing (different source). I have good luck (no problems) with all the brands mentioned above, except Philtron. Just haven't had the time or $$ to try them. __________________ Twisted Pear Audio

16th September 2006, 09:45 AM	#9
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, I would like to hear/see an unbiased comparison for an amp powered by a high end audio targetted transformer and a well made conventional toroidal transformer. __________________ regards Andrew T.

17th September 2006, 05:49 PM	#10
Colescuttle diyAudio Member Join Date: Sep 2006	Trying to contact "bikehorn." Could you post me offline at "george_cole*bellsouth.net."

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14th September 2006, 10:25 PM	#2
herm diyAudio Member Join Date: Mar 2002 Location: Seville, Ohio USA	I don't know about best, but certainly in stock and available... http://www.partsexpress.com/webpage....up_ID=605&SO=2 herm

15th September 2006, 01:59 PM	#3
traw diyAudio Member Join Date: Sep 2005	i liked some potted amveco's i'd picked up off ebay. very good. had plitron, didn't seem extrordinary. good but not sure if worth hassle. i like hammonds - various distributers. picked up some 'old' mesh wrapped ones off ebay. hefty and silent. the avel lindbergs easy to get from parts express... but i know the 800va 50x2 one i got for rod elliot p101. didn't need that much va, but only capacity in that voltage, with single transformer. it has a heavy mechanical hum. not too bad. also had 625 25x2 that i could feel... work well. i've had good luck with 'antek' (on ebay, parmetal related). wide variety of sizes. have had a 400va 23x2 and 800 30x2 from them and a 400va 20x2 coming. i prefer these over the ones from parts express.

15th September 2006, 02:06 PM	#4
widman diyAudio Member Join Date: Feb 2004 Location: Deep Elem	I have used an Avel-Lindberg 330VA-25V from PE and never experienced any hum or buzz. It has been working well in my Chipamp.com kit for a couple of years now. pete

15th September 2006, 02:07 PM	#5
traw diyAudio Member Join Date: Sep 2005	if all out no holds barred, go ahead get plitron. peace of mind is a good thing.

15th September 2006, 02:09 PM	#6
traw diyAudio Member Join Date: Sep 2005	yeah.... i think it'se just that i have a 800va and other capacities just fine. haven't tinkered with pads to see if i can soften it. plus mounted on substantial sheet metal that could amplify/resonate

15th September 2006, 10:39 PM	#8
bikehorn diyAudio Member Join Date: Aug 2004 Location: toronto	lately Plitron has been selling a high-end line of toroids for SS audio....the LoNo line. they have 4 secondaries, come potted in a black metal can and supposedly have lower inrush than a regular toroidal transformer. looks sweet... very very expensive though. a 500VA transformer was $305 canadian.

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