Leslie 600??

[Hamman]

Just picked up with a package deal of other stuff and to me looks like a solid state version of a 351 but with this funky "space generator" Was hooked up with this Conn 644 that I just acquired but I'll probably be selling the Conn separately. But some one may want it with the organ and I don't have a clue what this Leslie is worth. Its in great shape and works great....anyone?
Thanks

[jimmywilliams]

The 600 was a specialty multi channel model and has a really bizarre tremolo switching scheme. So, if you sell the Conn separately then remove the hookup kit / board as the Leslie is pretty much useless without it. I think the rotary channel had a treble horn but a rotosonic drum so the Hammond crowd might not care for it. Also bass was carried by a separate stationary channel IIRC. As far as value, beats me. Probably not much. There has been a 600 on eBay for months, now at 450 OBO, no bites. If I were you I would try to sell the Conn and Leslie together since it was designed to work with organs like the Conn. Do you have both tremolo controls - space generator and rotary?

[Hamman]

Thanks Jimmy!
Last night I spent a hour tuning the 644 and it sounds much better as you might have expected. I got around to hooking up the Leslie 600 (just plugging it in to the kit) and it actually sounds great especially after I adjusted the voicing on the organ and reset the Leslies amp channel volumes. Has a really nice ramp down time.....I would say like 30-45 seconds. The Conns Leslie tab switches work the Leslie speed selections just like it should. So I probably will sell both as a package as it just really expresses this organ tremendously.
One question though, The "bass" volume adjustment on this Leslie has no effect on the bass pedals or any other bass notes yet bass does come through this speaker via the "rotary" channel. What then is the bass volume control good for on this Leslie? I tried several times to print the schematics out on captian foldbacks site but they are un-readable.

[jimmywilliams]

Hi. I would have to check the schematics. I have the paper manual but will have to dig it up. I am on the train now and have things to do when I get home so it will have to wait until tomorrow. However I think only the lowest bass notes get routed to the 15" - it would also depend on the channel routing on the Conn kit.

[Hamman]

Hi Jimmy,
I have tried a couple of times unsucessfully to print out a readable copy of the schematics. But I did verify that the bass notes that are coming through to the leslie are indeed going to the 15" However It looks to me that this leslie has been modified. It looks to me that, like most Conns of this era, the bass is in the Tibia channel. That being said, it looks though that the "rotary" channel is reproducing the whole audio spectrum of the Tibia channel and then a separate crossover is dumping the low notes into the 15" . If that was modified to achieve this end result, somebody did a good job of wiring it that way. It works and I can get plenty of volume out of it. So I'm not too concerned about it. I was just hoping that the full audio spectrum wasn't going to just the 6x9 roto sonic speaker. So no worries on hunting down any schematics or anything...it works well as it is and that is how I will sell it. Thanks!

[jimmywilliams]

Hi. I just dug up the service manual. The organ console connector kit contains active crossovers that shunt below 100Hz frequencies into the bass channel - before the Leslie connection. The active filters are applied to both the rotary and stationary inputs. So your setup is fine. I don't see any evidence of a passive crossover routing anything to the 15" speaker. The passive crossover on the rotary side splits the signal into the horn and rotoosonic drum. There is however a passive crossover on the bass channel as the bass channel uses two speakers (15 and 6x9). I believe this is because the bass channel can also be used with drum machines etc. which would go along for the ride with the pedal tones, to make sure no tremulant is applied.

[Hamman]

Thanks Jimmy! As usual your a wealth of information! Well I dug into that Leslie 600 this past weekend since I couldn't leave well enough alone. I found out why the bass pot wasnt working on the bass amp section....because it wasn't hooked up! The bass I was hearing, which was quite abit, was all from the rotosonic 6x9. As I got more into this leslie the more I saw someone really mickey rigged it. So I started at the connector kit box where supposedly the xover for the bass was to occur to be sent via to the bass amp. Upon opening the box I found it totally screwed with. So I just rewired via through the 9 pin cable (which isnt exactly received in the leslie side pin for pin like a standard 9 pin leslie) I have the strings through their own amp section running to the 2 upper 6x9's. I then ran the tibia/pedal bass full range to a small active xover that I mounted in the cabinet that dumps 120htz and below to the "bass" amp section and the high pass to the "tibia" section. I took the funky space generator out since it had been abandoned what looks to be years ago. Now I have bass in the 15" and the rotary channel sounds sweet. I have never been a fan of how the strings sound through any Leslie as compared to the console speaker. They seem harsh as too on my 720 leslies. But it works and now I need to sell this set up to keep peace in the house Thanks for all your help!!