Organ conversion

Forum to discuss amp circuits besides the 18 Watters and their ilk.

Moderators: JMPGuitars, CurtissRobin, colossal, zaphod_phil, Daviedawg, Graydon

Post Reply
Mabus41
Unrated
Posts: 5
Joined: Thu 08/24/23 3:49 pm

Organ conversion

Post by Mabus41 »

Salvaged a Lowrey TP-44 Genie organ with a Leslie tremelo from a dumpster a few months back. Worked, but there were resistors and diodes missing and several keys did not work. Finally stripped it down today with the intention of building a guitar amp. Plan is to have the foot pedal be a controller for the tremelo. New to aamp building and am looking for any advice about this build.
0 x

User avatar
Bieworm
Verbose Wizard of Oz
Verbose Wizard of Oz
Posts: 2194
Joined: Mon 02/10/20 8:24 am
Location: Belgium

Re: Organ conversion

Post by Bieworm »

Could you post the schematic of what you have? That’s easier to determine your options
0 x
"THIS should be played at high volume..preferably in a residential area"

Mabus41
Unrated
Posts: 5
Joined: Thu 08/24/23 3:49 pm

Re: Organ conversion

Post by Mabus41 »

I am trying to find a good one online. Have downloaded a manual, but the typeprint in the schematic is not a good quality. May end up ordering a physical manual if no luck online. If I find a good one I will post it here
1 x

User avatar
TriodeLuvr
Frequent poster
Frequent poster
Posts: 610
Joined: Tue 10/16/18 11:19 am

Re: Organ conversion

Post by TriodeLuvr »

Based on the schematic I found, it's 100% solid state. If that's the case, why bother?
1 x

Mabus41
Unrated
Posts: 5
Joined: Thu 08/24/23 3:49 pm

Re: Organ conversion

Post by Mabus41 »

Why bother? Because I have the components to build a guitar amplifier and want to do so. Is that a problem?
0 x

Mabus41
Unrated
Posts: 5
Joined: Thu 08/24/23 3:49 pm

Re: Organ conversion

Post by Mabus41 »

Here's the schematic for the power supply
You do not have the required permissions to view the files attached to this post.
0 x

User avatar
JMPGuitars
Super Duper Admin
Super Duper Admin
Posts: 3841
Joined: Tue 09/18/12 8:00 pm
Location: South Central, MA
Contact:

Re: Organ conversion

Post by JMPGuitars »

Mabus41 wrote:
Sat 08/26/23 11:11 am
Is that a problem?
Potentially, yes. Since it's all solid state, the chances of any of the original parts supporting tubes is unlikely. If you're interested in building a solid state guitar amp (don't, they're terrible) you're on the wrong website for support. We may support amps beyond the 18W family, but only tube amps.

If you want to build a tube amp, the schematic for the solid state amp is useless. It's not likely that the transformers would be useful either.
0 x
'I installed a skylight in my apartment yesterday... The people who live above me are furious.' - Steven Wright

Modern Ground Schemes
Soldering Technique
B+ Voltage Reduction
Amplifier Tools & Parts Info


Web Design: DolceVittoria.com
Guitars / Amps / Effects: JMPGuitars.com
(anti)Social: Facebook · Instagram
Items for Sale

Mabus41
Unrated
Posts: 5
Joined: Thu 08/24/23 3:49 pm

Re: Organ conversion

Post by Mabus41 »

I will go find another place to talk solid state. Didn't realize this forum was so elite
1 x

User avatar
TriodeLuvr
Frequent poster
Frequent poster
Posts: 610
Joined: Tue 10/16/18 11:19 am

Re: Organ conversion

Post by TriodeLuvr »

Good luck with that. You're embarking on a project that's likely to be unrewarding in every aspect, other than being able to say you did it yourself. You might want to consider a used SS practice amp for $20-30 while you mull this over.
2 x

User avatar
Bieworm
Verbose Wizard of Oz
Verbose Wizard of Oz
Posts: 2194
Joined: Mon 02/10/20 8:24 am
Location: Belgium

Re: Organ conversion

Post by Bieworm »

This has nothing to do with us being some sort of elite. We are only trying to explain that none of us are familiar with completely solid state amps and trying to advise against building one. Components in SS amps are totally different from tube amp components. And SS amps sound like crap for people who build and love tube amps. It just izz what it izz
2 x
"THIS should be played at high volume..preferably in a residential area"

Post Reply