please see my updates on this article and especially this thread for a reference. Feel free to ask again.

All the best,
Hajo

I got this model not too long ago and i absolutely love it, probably one of the best clones. The problem is that it didnt come with a volume pedal, and recently ive realized volume control is necissary for true expression and magnum opus type epicness. I was wondering if these pedals, are still being sold or what what other pedals could also work with (and through which inputs they would be put through)?

BTW – great information on the organ – helped a lot when I first set it up.

sorry: I do not have the manual. Congratulations on your purchase, and have fun!

Regards,
Hajo

sorry for the delay. The percussion on my B250 is exactly as you describe it, no strong effect and not that real ‘toc’ sound. I may provide one or two sound files if this answer does not satisfy you. Still I would recommend to have your B250 serviced ASAP, it may be damaged by bad capacitors in the near future, see this article for reference.

Regards,
Hajo

I have a B-250 that I’m running through a Leslie 315. To be honest I don’t know a lot about the technical side but hell I love this instrument as far as looking and sounding great on stage gigging. This and a fender rhodes along side is my definition of heaven… Anyway- the only thing I find with it is that while switching on the percussion does have an effect it isn’t strong and certainly doesn’t have that real chunky ‘toc’ sound that you get with the B-3′s. How do you find yours? Is it likely normal or do I need to get mine looked at?

Thoughts appreciated
Glenn

option #1: insert a passive pedal in your 11pin cable to the leslie 815, either by soldering on the existing 11pin connector or -much more expensive- by ordering two addional 11pin connectors from Hammond and then fabricate some kind of breakout box.

option #2: I’ve added the necessary information to the post for you to rebuild the pedal, see “Update (June 6, 2009)”.

The schematic excerpt on the left shows the assignment of the 8-pin DIN volume pedal connector “Jack 1″ inside the B250 and how the voltage returned from the pedal on pin 3 runs on an op-amp stage (IC1) to then supply a volume control voltage for the output stages.

The appropriate schematic of the volume pedal is not available, but only an image of the board layout (component values added in blue letters). The additional LDR, which is lit by a small bulb, is connected to pin 5 & 6 of the PCB.

If rebuilding the optoelectronic part of the pedal is too complicated, have a look at the voltage divider R1/R2 on the schematic excerpt: you may passively control the volume with just an additional potentiometer connected to pin3 and pin 7 of “Jack 1″ (in parallel to R2). Possible value is 47k or the like.

Hope this helps.

It would be interesting to rebuilt the original Pedal. Im a student in electronic engineering so the curcuits should be no problem for me.

Thank u so much for your help.