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JTM45 Revisited

Posted: Mon Oct 10, 2022 9:33 pm
by Janglin_Jack
My first amp build ever was a modified reissue JTM45 for LegendaryTones.com. Anyhow, years ago I had built another JTM45 - this one I housed in a Mojotone 18w combo 1x12. I have a Scumback M75 in there. I recently got a 50w 1986 Bass head going and the amp bug bit me again. I pulled my JTM45 out of the garage as I remember I was in the process of tweaking some things before I stopped playing. I reviewed the circuit and noticed I had experimented with .0022 coupling cap and .0047. I put back in the .022 couplers and reduced the 1st stage cathode cap to 10uf. I also noticed at some point I put in 47K negative feedback resistor off the 8ohm tap. The amp is just glorious. I am glad I went back to the circuit to fix it.

Mike

Re: JTM45 Revisited

Posted: Thu Oct 13, 2022 10:11 pm
by Asphaltbouncer
Alright!

Great hobby we have here!

Enjoy!

Re: JTM45 Revisited

Posted: Fri Oct 21, 2022 1:34 pm
by Freebird
Cool to see you nailed it. Sometimes the right changes are often very simple.

Daniel

Re: JTM45 Revisited

Posted: Sat Dec 31, 2022 2:26 am
by sermal
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Re: JTM45 Revisited

Posted: Sat Jul 29, 2023 2:13 am
by jeeror
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