The Organ Forum - Electronics http://www.organforum.com/forums/ Discussion of building, customizing, and repairing electronic organs. en Fri, 24 May 2013 12:26:24 GMT vBulletin 60 http://www.organforum.com/forums/images/misc/rss.png The Organ Forum - Electronics http://www.organforum.com/forums/ Roland VR-760 main cpu board needed http://www.organforum.com/forums/showthread.php?26969-Roland-VR-760-main-cpu-board-needed&goto=newpost Wed, 22 May 2013 10:45:58 GMT Hi chaps,

I have a VR-760 in for repair that requires a main cpu board. This keyboard was discontinued long ago and isn't supported by Roland. If anyone knows of a dead unit anywhere, my customer would be very happy to hear about it.

TIA

Trevor
NSSC ]]> Electronics nssc http://www.organforum.com/forums/showthread.php?26969-Roland-VR-760-main-cpu-board-needed Where do I put them? http://www.organforum.com/forums/showthread.php?26963-Where-do-I-put-them&goto=newpost Tue, 21 May 2013 19:18:55 GMT Hi all;

I want to install a 'bunch' of felt pads to reduce the clunky noises in my pedal-board.
Anyone know where would be best to do so on my Conn 650?
I was going to buy some adhesive felt pads at Home Depot, but I'm not sure what would be best: thickness, size etc.

Ideas? Thanks! =3 Marc ]]> Electronics Suhndog http://www.organforum.com/forums/showthread.php?26963-Where-do-I-put-them Balance... http://www.organforum.com/forums/showthread.php?26962-Balance&goto=newpost Tue, 21 May 2013 19:17:57 GMT On my Conn 650, the Solo manual is much louder than the rest. Also, the great manual is a bit too soft where the Accompaniment manual is too loud..... On my Conn 650, the Solo manual is much louder than the rest. Also, the great manual is a bit too soft where the Accompaniment manual is too loud.. Even when I press the piston to reduce the non-Tibia stops for the ACC manual. I tried to adjust the internal trim-pots to balance the sounds, but that didn't help much. Also, the Tibias on the ACC manual are too loud - they overpower the non-Tibia stops - if I adjust the Tibia trimmer, then the Bass Tibia 8' is even more too soft.. Also, the 8' Tibia in the Bass is too soft, and I cannot find any adjustment that allows the Bass Tibia to be varied in relation to the manual's Tibias.
Any ideas? Thanks! - Marc ]]> Electronics Suhndog http://www.organforum.com/forums/showthread.php?26962-Balance External output module for Ahborn-Galanti AG3200 http://www.organforum.com/forums/showthread.php?26911-External-output-module-for-Ahborn-Galanti-AG3200&goto=newpost Fri, 17 May 2013 12:39:34 GMT My AG3200's external output module has two dead channels out of 12. I've been waiting for the warranty replacement for 15 months. Does anybody know of a decommissioned AG3200 that's going for parts so I could buy a used output module? Thanks. ]]> Electronics markn http://www.organforum.com/forums/showthread.php?26911-External-output-module-for-Ahborn-Galanti-AG3200 Safety Advice http://www.organforum.com/forums/showthread.php?26698-Safety-Advice&goto=newpost Mon, 06 May 2013 19:05:02 GMT Kudos to Andyg for starting this wiki article.

I think a related article would also be useful -- "Okay, I have just brought home a 50 year-old organ, I'm a neophyte with no tools. What should I do before turning it on for the first time?"

If any members can contribute to this, I'm sure a lot folks would benefit. My personal M.O. is -- inspect the cord; if it looks okay, just plug it in away from anything flammable, know where my fire extinguisher is, look away, cross my fingers, and flip the switch. There's probably a better way. I know about bringing amps up on variacs or light bulbs, but separating the amp from the motors in a Hammond is a pain, ditto for Leslies, and transistorized gear often doesn't work at all like that.

Wes ]]> Electronics Wes http://www.organforum.com/forums/showthread.php?26698-Safety-Advice Safety Advice for working on electronic organs and tone cabinets/leslies. http://www.organforum.com/forums/showthread.php?26697-Safety-Advice-for-working-on-electronic-organs-and-tone-cabinets-leslies&goto=newpost Mon, 06 May 2013 18:53:11 GMT *Safety Advice for working on organs, tone cabinets and leslie speakers* There is now an article in the Electronic Organs section of the Wiki that... Safety Advice for working on organs, tone cabinets and leslie speakers

There is now an article in the Electronic Organs section of the Wiki that gives sound advice for those who are considering working on their organ or speaker, but don’t yet have the experience or knowledge to do so. This article will be added to in due course with extra guidance from the forum’s professional technicians and experts.

If in doubt – READ IT!!

Here’s the link to the article: http://www.organforum.com/forums/sho...es&redirect=no

We would welcome any input from our professional technicians/engineers and our own experienced members. The article is protected to prevent editing. If you have some information that you'd like to add, please email it to me at andrew@andrew.gilbert.com and I will sort it out. ]]> Electronics andyg http://www.organforum.com/forums/showthread.php?26697-Safety-Advice-for-working-on-electronic-organs-and-tone-cabinets-leslies Service manual for Lowrey TSO-25? http://www.organforum.com/forums/showthread.php?26675-Service-manual-for-Lowrey-TSO-25&goto=newpost Mon, 06 May 2013 06:57:30 GMT I just picked up a Lincolnwood Deluxe, and it's amazing. But it needs a bit of work. Is there an online source for these old Lowrey manuals? Obviously, a free pdf would be great, but I'd certainly be willing to order from a vendor.


Thanks!

Jim Blair
Ape Island Sound ]]> Electronics Europanaut http://www.organforum.com/forums/showthread.php?26675-Service-manual-for-Lowrey-TSO-25 Allen ADC-222 External Speakers http://www.organforum.com/forums/showthread.php?26671-Allen-ADC-222-External-Speakers&goto=newpost Sun, 05 May 2013 20:16:14 GMT Hi there - I play at a church that has an Allen ADC-222. It's a small church and they just use the internal speakers in the chancel but that's not loud enough when the building is full.
They are looking at external speakers and have been quoted £200 to fit a relay speaker switch, but really we want to be able to use internal and external speakers together.

Can anyone give any guidance about whether we could just split the signal and use an external amplifier for when 'nave' speakers are used? I've not been able to look inside yet but is it fairly easy to bypass the mixer board and possibly get more channels/ split it to add a subwoofer etc.

Any help would be brilliant!

Thanks,
James ]]> Electronics jbkw http://www.organforum.com/forums/showthread.php?26671-Allen-ADC-222-External-Speakers Schematic for F2000 http://www.organforum.com/forums/showthread.php?26668-Schematic-for-F2000&goto=newpost Sun, 05 May 2013 17:56:20 GMT Hi All, I got a free Hammond F2000 organ yesterday. Hammond F-2000. Image:... Hi All,

I got a free Hammond F2000 organ yesterday.

Hammond F-2000.


I opened up the back to investigate as the organ was not very loud compared to our electric piano.

This is what I found.



I did not expect to find a NAD 3124 Stereo amplifier tucked away in there. That is one way to make a repair I guess. One output speaker channel was feeding the large speaker in the organ base directly. The NAD amp balance knob was turned all the way to that channel.



Can anyone suggest where to obtain the schematics for this F-2000 model organ? Whom ever "repaired" (if it can be called that) in the past feed an input signal into the NAD amp from the upper circuit board.

A schematic would help a lot to assist in this restoration. The original electronics are still in there. The original amplifier is based on the SANYO STK029 IC. Similar models include the VS300 "Cadette" series. Are VS300 schematic's available anywhere?



The original SANYO STK029 IC amp is hidden around behind the transformer.
]]> Electronics dneprrider http://www.organforum.com/forums/showthread.php?26668-Schematic-for-F2000 Running a Relay Off Tube Guitar Amp Heaters http://www.organforum.com/forums/showthread.php?26529-Running-a-Relay-Off-Tube-Guitar-Amp-Heaters&goto=newpost Tue, 30 Apr 2013 00:20:17 GMT Hey everyone, I'm working on an amp right now and could use some advice.

I'm building a single-ended tube amp that I'm installing a Leslie connection in. Since I designed it to have both 6H and 6W connections, I included a relay to control both AC and DC switching voltages safely. I don't have a lot of room in the chassis and I don't think I have room for a step-down transformer. Would it cause problems to run the relay off the 6VAC heater voltage? At first I didn't think it'd be a big issue, but now that I've realized the switch would need a few feet of cable (it'll be a footswitch) I'm thinking the extra wires might cause hum in the amp.

What if I use a small 1:1 transformer like those used for the typical Leslie 6H outputs? So the 6VAC tap would connect to the tube heaters and the transformer, and the secondary of the transformer would connect to the relay. Would that sufficiently isolate the relay (and the 5-7ft of cabling to the switch) from the heaters in the amp?


Thanks for the help! ]]> Electronics torea http://www.organforum.com/forums/showthread.php?26529-Running-a-Relay-Off-Tube-Guitar-Amp-Heaters allen tc-3s church organ gyrophonic projector wiring hookup http://www.organforum.com/forums/showthread.php?26503-allen-tc-3s-church-organ-gyrophonic-projector-wiring-hookup&goto=newpost Sun, 28 Apr 2013 16:34:35 GMT I just got this allen tc-3s organ in and it has the gyrophonic projector with it . I did not unhook this and do not know how the wires go . I can... I just got this allen tc-3s organ in and it has the gyrophonic projector with it .
I did not unhook this and do not know how the wires go .
I can hook the gyrophonic speaker up with the two wires and the speakers sound fine.
The problem is I do not know how to hook the wires up to the organ to turn the motor on and for the turn table to turn. I think it should have two speeds.
It does have the plug with four wires going to the amp in the gyrophonic speaker and it plugs in as it should .
What I need to know is how the four wires hook up in the back of the organ.
The gyrophonic speaker amp wires are one white, one black, and the other two wires are together and they are red and green.
I am thinking these wires go to the electronic whind supply ( cutout - gnd - control ) or do these wires go to the ( b+ or the Gnd ) .
Thanks for any help with this hookup. ]]> Electronics Tim Groom http://www.organforum.com/forums/showthread.php?26503-allen-tc-3s-church-organ-gyrophonic-projector-wiring-hookup DIY Farfisa Compact Duo Power Supply http://www.organforum.com/forums/showthread.php?26485-DIY-Farfisa-Compact-Duo-Power-Supply&goto=newpost Sat, 27 Apr 2013 18:34:03 GMT I have a Farfisa Compact Duo that came missing its external power supply. I want to build a temporary one to run the organ from while I troubleshoot... I have a Farfisa Compact Duo that came missing its external power supply. I want to build a temporary one to run the organ from while I troubleshoot it. I have tried a couple of ideas that haven't worked and I don't know whether the organ is the problem or whether it is the power supply being inadequate. I can't be sure that the DC that I am supplying is clean enough or whether the ampage is correct.

The only solution seems to be to try and copy the original.

The question I have is about the transformer on the schematic on the top right hand corner. Where the 24VAC comes out there is a box with B30 C500 in it. What is that?

Cheers

Dave
Attached Images
]]> Electronics tonewheel1966 http://www.organforum.com/forums/showthread.php?26485-DIY-Farfisa-Compact-Duo-Power-Supply