Organ to Guitar conversion...
Hey! Converting a church organ: does it become a mosque organ, or -- sorry. For my first post I should be less flippant. I've got tons of useful raw paterials, knobs, speakers, leslie bits, etc. from old organs, a there's a piano/organ place nearby. Stands to reason the Hammond's a good source for the whole amp section, neverminding the difficulty replacing tubes, perhaps, but the tone source is just filtered magnetic pickups looking at toothed rotating "tone wheels". I have the unpopular version of one of these (L-101) gathering dust in the barn. (Anyone in SE Pennsylvania have a pickup truck and a reasonable offer?)
Someone will have to point out that the spring reverb comes to us out of electric organ technology, so I'll do that. Here's a trivia question: Who's label says something to the effect of: "Made under controlled atmospheric conditions by beautiful girls in Milwaukee,WI"?
I pose the question this way 'cause I can't remember the name here at work. It's a silver label on the "Folded Line Reverb", a spin-off of Accu-tronics, the original Hammond spring...what was the topic...? Oh yeah.
Let us know how you do.
Hey! Converting a church organ: does it become a mosque organ, or -- sorry. For my first post I should be less flippant. I've got tons of useful raw paterials, knobs, speakers, leslie bits, etc. from old organs, a there's a piano/organ place nearby. Stands to reason the Hammond's a good source for the whole amp section, neverminding the difficulty replacing tubes, perhaps, but the tone source is just filtered magnetic pickups looking at toothed rotating "tone wheels". I have the unpopular version of one of these (L-101) gathering dust in the barn. (Anyone in SE Pennsylvania have a pickup truck and a reasonable offer?)
Someone will have to point out that the spring reverb comes to us out of electric organ technology, so I'll do that. Here's a trivia question: Who's label says something to the effect of: "Made under controlled atmospheric conditions by beautiful girls in Milwaukee,WI"?
I pose the question this way 'cause I can't remember the name here at work. It's a silver label on the "Folded Line Reverb", a spin-off of Accu-tronics, the original Hammond spring...what was the topic...? Oh yeah.
Let us know how you do.
you may want to take a look at the Vintage Silvertone Guitars and Amps forum. A few of the members there have been doing amp conversions (pa amps, tube hi-fi, and tube organ amps). One of the most recent is a Hammond PR-40 Tone Cabinet ( an add on preamp to drive a stock cabinet)
Vintage Silvertone Guitar and Amp Forum
jkratz
here's a picture of the label on one of those reverb tanks that you were talking about.
Vintage Silvertone Guitar and Amp Forum
jkratz
here's a picture of the label on one of those reverb tanks that you were talking about.
Attachments
Folded Line reverb
Mark:
Thanks --
I have two of these in the garage; I thought it was a hoot the first time I read that. Only a technician would even see that. I did make a passive Leslie cabinet by mounting the frame, motor, and spinning styrofoam cone inside a plywood box. It has a simple hi-low speed switch, the motor switch to get it spinning, and only it's own speaker wired directly to an input jack. The sides of the box are ported to let the sound out, you mike it from there or just let it warble near your audience for effect. You need a speaker-out signal from your amp to run it; this keeps the design simple. If anyone wants a step-by-step I could talk you through it with pics and all. The whole frame is easily removed from old organs with hand tools.
I'm a recovering stomp-box schematic addict with a cabinet full of Bazz Fuss and Electra IIbe's and the like. Hi. My name is Jonathan.
J
Mark:
Thanks --
I have two of these in the garage; I thought it was a hoot the first time I read that. Only a technician would even see that. I did make a passive Leslie cabinet by mounting the frame, motor, and spinning styrofoam cone inside a plywood box. It has a simple hi-low speed switch, the motor switch to get it spinning, and only it's own speaker wired directly to an input jack. The sides of the box are ported to let the sound out, you mike it from there or just let it warble near your audience for effect. You need a speaker-out signal from your amp to run it; this keeps the design simple. If anyone wants a step-by-step I could talk you through it with pics and all. The whole frame is easily removed from old organs with hand tools.
I'm a recovering stomp-box schematic addict with a cabinet full of Bazz Fuss and Electra IIbe's and the like. Hi. My name is Jonathan.
J
I salvaged that reverb tank out of an old Traynor MX6800 powered PA mixer. That was about all that I could save out of it though. It was "stored" in a barn for about 15 years before I got it.
I haven't done much with organs myself though. Do Hammond organs use a seperate chassis for the preamp, volume, and tone controls? Or do they just come off of the tone ring pickups to a passive volume and tone stack?
Vince8
Does that amp chassis have any smaller preamp tubes?
(12a_7 or somthing like that)
I haven't done much with organs myself though. Do Hammond organs use a seperate chassis for the preamp, volume, and tone controls? Or do they just come off of the tone ring pickups to a passive volume and tone stack?
Vince8
Does that amp chassis have any smaller preamp tubes?
(12a_7 or somthing like that)
Try this link to a schematic of the organ. The aluminum chassises...es.. boxes the circuits are in are stamped as shown in the drawing. The rat's nest of thin wires towards the top are daunting, but I may bite the bullet and start sacrificing this thing for the purpose shown, if I can back-track from the speakers and decipher where "sound goes in", and will let y'all know how it goes. Plug the guitar into one magnetic pickup line, tape off the rest, and use the drawbars for effect? Split the signal and run it via several drawbars? No takers? No...?
www.zeni.net/pipermail/hammond/2001-August/014902.html
That's where I got the schem. Impact Thrift is where I got the organ. I'm in Horsham, PA, if anyone wants to stop the senseless slaughter of vintage tube audio equipment. This gentleman...
www.jessedeane-freeman.com/hammondstuff.html
... has nearly got me rearranging the house and going, no! Don't kill it! Find it a corner to quietly sit in...it's old, it's special, it's...
It's getting eaten by mice, and weighs 500 pounds plus an inch of dust, is what it is.
J
www.zeni.net/pipermail/hammond/2001-August/014902.html
That's where I got the schem. Impact Thrift is where I got the organ. I'm in Horsham, PA, if anyone wants to stop the senseless slaughter of vintage tube audio equipment. This gentleman...
www.jessedeane-freeman.com/hammondstuff.html
... has nearly got me rearranging the house and going, no! Don't kill it! Find it a corner to quietly sit in...it's old, it's special, it's...
It's getting eaten by mice, and weighs 500 pounds plus an inch of dust, is what it is.
J
needing some help with conversions
hey i'm new here.
i have heard many talk about the possibility of converting hammond organs into guitar amp. i just salvaged one not sure of the details to it. it has a built in leslie, 2 12's and a spring tank. i dont know if hammond have built in tube amps or what not. so if anyone could break down whats commonly inside of the hammond organs, and how you would go about building a guitar amp from one it would be appreciated. plans or schematics.
i would like to be able to get this going and add a gain channel and foot switches for the trem speed and the reverb, also a switch on/off for the gain channel.
again any help would be greatly appreciated.\
thanks
kyle
oh and does anyone know what kind of speakers were used in many hammond organs? i have heard jensens. but there are no obvoius markings on the ones that i have.
hey i'm new here.
i have heard many talk about the possibility of converting hammond organs into guitar amp. i just salvaged one not sure of the details to it. it has a built in leslie, 2 12's and a spring tank. i dont know if hammond have built in tube amps or what not. so if anyone could break down whats commonly inside of the hammond organs, and how you would go about building a guitar amp from one it would be appreciated. plans or schematics.
i would like to be able to get this going and add a gain channel and foot switches for the trem speed and the reverb, also a switch on/off for the gain channel.
again any help would be greatly appreciated.\
thanks
kyle
oh and does anyone know what kind of speakers were used in many hammond organs? i have heard jensens. but there are no obvoius markings on the ones that i have.
I might be able to help identify the speakers.
Is there a 6 digit number stamped on the speaker, like 220607 for example?
the first three digits stand for the manufacturer and the last 3 are the date code.
the ones in my guitar amp for example have 220607
220 = jensen , 6 = last digit of the year (1966 in this case), 07= the seventh week of the year
Weber speakers has a website that lists manufacturer and date codes here.
common ones are
220= Jensen
328= Utah
285= Rola
Is there a 6 digit number stamped on the speaker, like 220607 for example?
the first three digits stand for the manufacturer and the last 3 are the date code.
the ones in my guitar amp for example have 220607
220 = jensen , 6 = last digit of the year (1966 in this case), 07= the seventh week of the year
Weber speakers has a website that lists manufacturer and date codes here.
common ones are
220= Jensen
328= Utah
285= Rola
That Hammond...?
My son, with a B-B gun, in one afternoon of ten-year-old thoughtlessness, put at end to the project. I'd dismantled the organ and laid out the circuits, which had been working, and blown up the schematics, and begun thinking it through, and he shot up all the tubes and everything made out of glass in the barn.
I still have the leslie stuff, however, and just found a "real" leslie enclosure to look over -- the big bureau-sized thing with a spinning base speaker thing in the bottom and the black tweeter cones in the top!! Woo hoo.
Anyone want to buy one of the smaller things, for use as passive guitar effecters? WE could work something out, or I'll post them on eBay, where I call myself "soundcloset".
Jonathan
My son, with a B-B gun, in one afternoon of ten-year-old thoughtlessness, put at end to the project. I'd dismantled the organ and laid out the circuits, which had been working, and blown up the schematics, and begun thinking it through, and he shot up all the tubes and everything made out of glass in the barn.
I still have the leslie stuff, however, and just found a "real" leslie enclosure to look over -- the big bureau-sized thing with a spinning base speaker thing in the bottom and the black tweeter cones in the top!! Woo hoo.
Anyone want to buy one of the smaller things, for use as passive guitar effecters? WE could work something out, or I'll post them on eBay, where I call myself "soundcloset".
Jonathan
Hammond Organ Saga Continues
New Project: Someone dumped a dusty and repainted Leslie 122V cabinet behind the local student-instrument store. I took it home, cleaned it out, and tried the motors and one of the pre-amps out, and so far it looks good. What's the value of a working one, and who's done a conversion or is interested in it as a working piece? I'll browse eBay prices for comarative condition. The power amp takes A.C. and audio source from an organ console via a fat 6-pin cable, I think, but under the dust this thing is cool, old, and seems to work!
I've locked up both the b-b gun and the son this time around...!
There's a schematic on the side of the power amp; it's the pre-amp (?) and reverb driver chassis that appears to work. I'll take digital pics of it and post later.
New Project: Someone dumped a dusty and repainted Leslie 122V cabinet behind the local student-instrument store. I took it home, cleaned it out, and tried the motors and one of the pre-amps out, and so far it looks good. What's the value of a working one, and who's done a conversion or is interested in it as a working piece? I'll browse eBay prices for comarative condition. The power amp takes A.C. and audio source from an organ console via a fat 6-pin cable, I think, but under the dust this thing is cool, old, and seems to work!
I've locked up both the b-b gun and the son this time around...!
There's a schematic on the side of the power amp; it's the pre-amp (?) and reverb driver chassis that appears to work. I'll take digital pics of it and post later.
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