Marshall JTM45 Tremolo -- Vintage repro build
Moderators: pompeiisneaks, Colossal
Marshall JTM45 Tremolo -- Vintage repro build
A new client from Los Angeles asked me to assemble his Super Tremolo Amplifer. According to my client, he spent $800 on knobs and $700 on KT66s alone!
I'm trying to figure out the wiring of the footswitch on the tremolo turret board. Any photos I can find show two wires from the footswitch going to the turret board--one to the Collector, and one to the empty turret below. But I can't see what that mystery turret is connected to, and the schematic does not shed any light. Any help?
This is a photo of the actual board he sent me, with my notes:
Schematic:
I'm trying to figure out the wiring of the footswitch on the tremolo turret board. Any photos I can find show two wires from the footswitch going to the turret board--one to the Collector, and one to the empty turret below. But I can't see what that mystery turret is connected to, and the schematic does not shed any light. Any help?
This is a photo of the actual board he sent me, with my notes:
Schematic:
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I build and repair tube amps. http://amps.monkeymatic.com
- martin manning
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Re: Marshall JTM45 Tremolo -- Vintage repro build
Schematic shows the foot switch between the collector and the intensity pot wiper. That empty turret is the pot wiper, I think.
Re: Marshall JTM45 Tremolo -- Vintage repro build
Ok, so two wires run to the foot switch, these two wires make the connection between transistor and pot wiper then ftsw is closed. Right?
I build and repair tube amps. http://amps.monkeymatic.com
- martin manning
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Re: Marshall JTM45 Tremolo -- Vintage repro build
That's the way I see it on the schematic, and the photos seem to agree.
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Re: Marshall JTM45 Tremolo -- Vintage repro build
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Signatures have a 255 character limit that I could abuse, but I am not Cecil B. DeMille.
Re: Marshall JTM45 Tremolo -- Vintage repro build
Project finished and shipped. Went really well, even considering it took over twice as long as I estimated (23 hours total). Glamor shots and video below.
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I build and repair tube amps. http://amps.monkeymatic.com
- Colossal
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Re: Marshall JTM45 Tremolo -- Vintage repro build
Looks and sounds killer. Very nice work! Big, fat low end.
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Re: Marshall JTM45 Tremolo -- Vintage repro build
Great job! Lets cascade it and....
Signatures have a 255 character limit that I could abuse, but I am not Cecil B. DeMille.
Re: Marshall JTM45 Tremolo -- Vintage repro build
Cool! What’s that socket isolator on V1 called?
Just plug it in, man.
Re: Marshall JTM45 Tremolo -- Vintage repro build
No clue. Was supplied by client.
I build and repair tube amps. http://amps.monkeymatic.com
- martin manning
- Posts: 13210
- Joined: Sun Jul 06, 2008 12:43 am
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1 others liked this
Re: Marshall JTM45 Tremolo -- Vintage repro build
Very nice! Looks and sounds great!
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Re: Marshall JTM45 Tremolo -- Vintage repro build
It is a stunning amp. I always love the chop of the trem on good /T models.. and this one is excellent!
Signatures have a 255 character limit that I could abuse, but I am not Cecil B. DeMille.
Re: Marshall JTM45 Tremolo -- Vintage repro build
Now that is a sight to behold, simply superb.