Traynor YGM-3 (early) - Selmer cab

[martin manning]

See my edit above with link. Hooking it up won't be too hard, but you'll probably have to adjust the bias circuit to work with the lower voltage.

[Barks]

...sorry Martin, didnt fully answer your question.

Initially, I wanted to tame some of the bass response as it was always a little flubby. That was when I came across those Pat Furlan videos.

In doing those mods and getting good results, it made me start thinking about learning a bit more and taking it seriously AND thus getting to the bottom of the PT issue - which has been a little worry for me over many years when I was initially informed of the issue.

I love these 20 wattish range amps. I've a 50 watt here and its just too loud sometimes on gigs.
I always come back to this one. I know it, it does the job and always seems just right.

So Im taking it seriously and want to get it right and make it last. Reeltarded has gotten me on that road now in dialogue over the last few months and now you guys are really helping!

cheers

[Barks]

btw, mine is the early 3 input model with the rite cap permanently in circuit. Not the later 2 input with the brite switch and different V1 location.

this is the schematic I found for reference that closely relates to mine. Hopefully any values and voltages are clear.

http://www.lynx.bc.ca/~jc/690131_Ygm3.gif

cheers again

[martin manning]

Ok that helps. I think this is the one you want: http://www.digikey.co.uk/product-search ... mond+372dx

... or at least it's closer to the original spec. The lower voltage 370EX PT would be easier on the output tubes.

[rp]

Hammond 300 series are far and away my fave PTs but here's a couple other UK options:

http://modulusamplification.com/18-watt ... 57631.aspx

http://www.tube-town.net/ttstore/Transf ... :5989.html

http://livinginthepast-audioweb.co.uk/i ... rmrclassic ->

http://www.vvttransformers.co.uk/ht_tx.htm
This last makes affordable replacements for old Brit Hifi so they have 2XEL84 PTs, you can pick your PT layout for any version (bells, leads etc.)

Now that we have sourcing out of the way, I would just spring for the not excessive money and replace the PT and be done w/ it. It's a solid platform and should sound pretty good once all tweaked up and running the EL84 @ ~320-340V.

Those Goodman's look like a lot of fun.

[Bob S]

Great decision going with a new power transformer.
Why settle for band aids - that's a nice little amp.

[martin manning]

A Traynor has to have a Hammond PT, eh? ;^)

I think go for the 370EX. My best estimate is it will land right around 400V.

[rp]

A Traynor has to have a Hammond PT, eh? ;^)

Didn't occur to me. But absolutely!

[Barks]

Thanks Everybody!

Yes I'm going to go for a new PT I think.
Now to read up and understand about biasing a bit more and try figure out how the current PT has been implemented and cross reference!

Here is a crappy video demo of the amp from a few years ago before any mods etc. Vol at about 7 and just plugged in.
Camera mic compresses and it gets a little grainy which is not wholly representative.
You can hear some slight "fizziness" within the distortion which is something I'd like to tackle once I sort the power out - and make it less of a nuclear meltdown opportunity!

[Barks]

Yes, Traynor was all about Hammond Transformers.

I had a Traynor Mark 3 head before this that had all Hammond TX in it. A Fender on steroids. I'm also a keyboard player and own a 1961 M100 and Leslie 145. I used to think they were the same company!

The output one is still the original paper Hammond A1339.

Becoming more of a restoration now.

[cbass]

Shoot I didn't know a new pt was an option . I guess everyone isn't as stingy as me. You'll have the old pt for a project too.that thing looks big enough to handle a couple of el34s

[rp]

that thing looks big enough to handle a couple of el34s

Gonna have to to get the heater voltage down to reasonable w/o the resistor kluge. Looks like big amp build is in the OPs future

[Reeltarded]

Almost as if a 220 tap was seeing 240, huh?

[cbass]

Zackly

[Reeltarded]

I think that transformer might be an 80s ROW Drake.