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Old 14th September 2005, 10:33 AM   #1
barfind is offline barfind  Australia
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Default Choosing the best el34 pp opt

Hi all. I have a el34PPP amp, and I want to put good opts on it. I have heard that good opts can make a big difference. Is this true, and what difference does it make.
Thanks for your help

Nigel
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Old 14th September 2005, 10:57 AM   #2
SY is offline SY  United States
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It is the single most important component in your amplifier. It's the primary determinant of frequency response and power bandwidth (once you've chosen the output tubes). Unfortunately, good iron is NOT cheap. Two very well-regarded brands are Sowter and Magnequest. There are others.

My preference is for vintage iron, but that's always a risk.
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Old 14th September 2005, 01:24 PM   #3
barfind is offline barfind  Australia
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Thanks sy. I will look into those you mentioned. Hopefully others can make other recomendations as well.

Nigel
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Old 14th September 2005, 01:27 PM   #4
kmtang is offline kmtang  Canada
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Plitron's toroid output transformers are with very good quality and wide/flat bandwidth. I would recommend that.

You are check out from their web site and they sell to customers direct. www.plitron.com


Johnny
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Old 14th September 2005, 02:44 PM   #5
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For the price, I think Ned's clones of the Dyna transformers can't be beat. http://store.triodestore.com/dytr.htmlDynaClones
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Old 14th September 2005, 03:55 PM   #6
amperex is offline amperex  United States
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Default Tom B

The audio transformers used to be supplied from MQ. Due to whatever reason, they are now produced by another company. Are the new transformers same sonics as the MQ? Anm I misinformed? I do know the Dynaco replacement audio iron I bought (MQ) were a real bargain regarding performance & cost.
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Old 14th September 2005, 05:05 PM   #7
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Triode doesn't carry Magnequest any more - but the current transformers are about half the price of the Magnequest ones they used to carry. I doubt they're as good, but I think they're close... Dyna amps weren't the best, but were hard to beat at the price. Same goes for Dynaclones today.
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Old 14th September 2005, 05:14 PM   #8
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Try Lundahl...

Mark
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Old 14th September 2005, 06:19 PM   #9
amperex is offline amperex  United States
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Default Tnx Tom

I recall Teds MQ were about 60% cost direct from MQ. I quickly snatched up a pair of MQ A-470s on sale last winter. Ted does have great prices & quality must be at least as good or better than Hammond.
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Old 14th September 2005, 06:24 PM   #10
amperex is offline amperex  United States
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For cost savings, I found high quality used Dynaco Z565 with the cloth wires on eBay for about $75 to $100 per pair. I understand later designs with the plastic wires are not as desirable.
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