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Old 26th February 2011, 08:16 PM   #1
RTF671 is offline RTF671  United States
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Default Output Transformers... Decisions Decisions

I have a 100w (it will be push pull) guitar amp I'm working on and need some input on output transformers. It will use a quad of 6L6s in the power section. Right now I have found two likely candidates.

AnTek 100L
Link to datasheet

Edcor CXPP100-MS-2.2k
Link to product


I know the Edcor one is good but does anyone have experience using Antek for outputs?

Additionally I haven't set my heart on either of those, if anyone has a better suggestion I'll look it over.

Thanks for the help
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Old 26th February 2011, 08:27 PM   #2
kevinkr is offline kevinkr  United States
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Since this is a guitar amplifier why not take a look at the many replacement Marshall and Fender OPT options out there. I'd think a proper guitar OPT would be better in terms of its sound than something intended for HIFI or made by an outfit with not a lot of experience with designing guitar transformers.

The Antek has not gotten a lot of good press, could be just right for guitar, but probably not. High risk IMHO.

YMMV and I have limited experience in this area, so my comments should be taken with a grain of salt.
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Old 26th February 2011, 10:18 PM   #3
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I have a Fender transformer from one that uses four EL34s I believe. It was replaced but I don't think there is anything wrong with it.

If you are interested I can send you info and if you want it you can make me an offer.
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Old 27th February 2011, 12:38 AM   #4
RTF671 is offline RTF671  United States
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Certainly, I would like to see the specs on it.

As for 'proper vintage', not terribly into that. I would prefer something toward the hi-fi end in order to support drop tunings and my 7 stringers.
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Old 27th February 2011, 01:11 AM   #5
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Tube-Town Online-Store - Hammond 1750D Fender Outputtransformer 026478 Tone-Master ha1750d

Apparently a new one is 112 Eur which translates to about $80 USD.

The primary is 2350 Ohms CT. One secondary is 4, 8, and 16 Ohm tapped. The other secondary is a puzzle; the Fender schematic shows no connection to that winding, Orange and White wires.
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Old 27th February 2011, 03:14 AM   #6
RTF671 is offline RTF671  United States
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I can't give a certain yes no as of yet. I have not started building it yet and cannot commit to it. By no means hold it for me, if it's still around then I'll let you know.

Quote:
Originally Posted by kevinkr View Post
The Antek has not gotten a lot of good press, could be just right for guitar, but probably not. High risk IMHO.
Those were my thoughts as well. I thought I should post first. I was considering using a PT from them (200va for $35 with low leak? So Down.).
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Old 27th February 2011, 05:53 AM   #7
Matt BH is offline Matt BH  United Kingdom
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I am in no way an expert on guitar amps. I would say that 3.3K is a good load for a quad of 6L6 types. I speak from experience on this but only for Hi Fi. I tried 2.2K with some 807s and the distortion was nice but not what I wanted. You may enjoy this for guitar. Like I said I am no expert. One thing I will say is that you still need a big enough tranny, core saturation sounds bloody awfull and it doesnt do anything any good
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Old 27th February 2011, 07:21 AM   #8
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Originally Posted by bob91343 View Post
Apparently a new one is 112 Eur which translates to about $80 USD.
Please hook me up with your international exchange guy, asap.
I have some currency transactions to do!
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Old 27th February 2011, 08:58 AM   #9
K.A.B is offline K.A.B  Sweden
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Then you have Mercury Magnetics I had replaced old broken opt in a marshall for an friend and he said it sounds much better now an the old one.

Anders
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Old 27th February 2011, 09:35 AM   #10
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Quote:
Apparently a new one is 112 Eur which translates to about $80 USD.
Riiight. About $154 in fact.

The advantage of building a guitar amp is that you generally don't have to worry about frequencies below about 100Hz and above a few kHz. That means you can get away with much cheaper iron than in hifi amps.
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