Dean Markley T120-R fixer-upper project. - Page 4 - diyAudio
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Old 13th November 2013, 07:14 AM   #31
Tarzan is offline Tarzan  Belgium
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Location: Genk
Hello Tricktronix,
Find the schematic here:

Good luck,
Attached Files
File Type: pdf T-120R.pdf (434.3 KB, 60 views)
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Old 14th November 2013, 08:47 AM   #32
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Location: Arizona, USA
Thanks Tarzan! Much Gratitude.
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Old 11th March 2014, 11:16 PM   #33
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hey there , just been fixing up my CD 120 as the speaker was fried put in an EVM12L
sounds fantastic , any info on these amps is hard to find ,
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Old 5th November 2014, 09:06 PM   #34
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Default it's been a while

Well, just dragging up a thread i posted sometime ago....

Just today received replacement valves, in 2 days from order no less! Watford Valves, very efficient people!

So the old mixed up bunch of cheap Chinese short tube 6L6GC, and a pair of Phillips ECG 6LLGC in tall tubes, are gone (ok I saved them for "just in case...")
The cheap Chinese ones were always red hot, the Phillips cool.
So through investigation i discovered what i guessed would be the closest to the original Phillips pair.

I open the boxes, and they are identical apart from the print colour. The green of the new valves, verses the white of the originals. So I guess there was a non-military version of this valve, perhaps a commercial version produced from mil spec version (since the originals are labelled 6L6GC rather than 8751)

In went the Phillips ECG str387 (8751a)....

My god! Everything is just rosey

Take my word. If you have one of these amps, with the original GEC 12AX7 in the preamp stages, DON'T replace them, not even EH. unless you have the ultimate valve.

The range of sounds...reissue 69 Strat, and Modern LP. Poles apart. Clean as you like with the Strat, warm bluesy mush if you want. The LP just rocks, though getting a pure clean sound is a little more difficult, being down around "1" on the preamp. So dial the guitar down.
Balancing the things I must do, with the things I'd like to do...This is a skill (or a luxury) amongst many that I do not possess.

Last edited by mondogenerator; 5th November 2014 at 09:10 PM.
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