Help me learn to combine circuits.

[andyg]

Hmm. I posted a reply earlier on, no sign of it! These leslies predate the Rialto II by some way, as they were intended for the Rialto - no 'II'. And they were used on high end Lowreys like the H25 series. With a bit of jiggery-pokery they can be used on other organs, but I've not heard of anyone using them for non-organ sounds. What sometimes happens is that a Rialto is on sale, with its leslies, someone sees the magic 'L' word, and persuades the seller to split the sale. Result? An organ that is almost unsellable and unusable without its dedicated cabinets and a buyer with two cabinets that are almost unusable. Criminal, IMHO!

I personally don't think you could have chosen a more difficult pair of leslies to modify, as they were so specialised. But you have the schematics in an earlier post and an idea of what you want to do. But you're thinking EQ, compression, mixers, channel strips etc, which is somewhat alien to the world of leslies. Do all this before the signals hit the leslies. Then decide what you want the leslies to do to the sounds. Then start designing and building or yes, you'll have nice cabinets and lots of spare parts.

[Steve_Oakland]

Thanks to everybody for your input. I'll be coming up with a plan here soon and will post to get your final thoughts. All of you have helped me understand more than I knew I was getting into. That said, I'm excited to get these babies up and running with multiple capabilities. There's no way I'm parting these out. I'm not looking for the money. If it came down to it I'd sell them the way I got them for whatever I could get back on them. Currently, that's not an option. Ya know?

Does anyone have the manual or pin out for the Gulbransen these were made for? Just want to be sure the pin out I have from the previously posted schematics matches their manual. I don't see why it would be different than the amp schematics but I just want to cover all my bases so I don't go pushing 120v through a channel instead of the PS.

Seriously, thank all of you!

[Steve_Oakland]

I found the pin outs. Can anyone help me understand pins 6 and 7? Both 102 and 103 have the same functions for each pin. Also, how might one get creative with the Aux pin? Or how is it used in the speaker?

[Doddy.van.Straaten]

Checkout these diagrams, you can see the two inputs you describe where they control various relays that switch between the Drum Speaker and the Static speaker. The DC signals are sent from the Rialto consoles stoptabs to the two different types of cabinets.

The 102 would have been used for a single audio channel of Tibias only, the 103 was used for the two 'Main' audio channels (C and C#) for non-Tibia voices.




For the connecting box you asked for earlier, I made the mistake of associating these cabinets with the Gulbransen Rialto II.

It should have been the Gulbransen Rialto 'K'



Jan Giradot of this forum has the technical manual for this instrument.

[paulj0557]

For what it's worth this late in the thread, I posted the service/installation/owners manual for the Leslie 102/103 a while back. Scanned it completely and posted it to SCRIBD. Unfortunately Scribd has become an E 'book' site and it went bye bye. However, if you need the scan reposted I can put it on Photobucket. As a matter of fact you might be in luck because I'm pretty certain I posted it to the PHOTOS section of the ELECTRONIC ORGAN HISTORY Yahoo group. And possibly here on the Organ Forum gallery.

Tapping into Leslie cabinets to use with other various models of organs than what they were intended is fairly simple. If you go to- http://www.tonewheel.com/adaptor.htm and click on the first highlighted here in the opening paragraph it takes you to a myriad of Leslie wiring adapters, simple preamps, etc. you can build yourself. I'd love to have a 102/103 for my Gulbransen Rialto II. These cabs were made for the Rialto K, K2, and Lowrey Heritage, but will liven any 4 channel organ, or just go BIG MONO on a Hammond. Thing is you will have the ROTOSONIC sound, which to me sounds great on a Hammond R100 and on the Hammond Elegante I used to have. I've never had rotosonic Leslies going with an upper horn at the same time so not sure of what I'd make of that tonal combination...uh' bubbly and whirly maybe?? . In the end, regardless of the organ model I still prefer a Leslie 12" or 15" drum, but to have the 102/103's SPACE GENERATOR, ROTOSONICS, and HORN all at once on my Rialto II that would be awesome. The factory recommended Leslie 705 and pair of 540 2-CH 'toppers' for the Rialto II sound very good, but to get great you must have TUBES!! Then again it has to do with how you play and what you expect to hear. Tubes let the player push the dynamic boundaries more and IMO sound far more bold+warm+professional. Coming from a tube guitar amp modifying background I can tell you that with the iron and tubes you have in that pair of Leslie's you can drive it anyway you wish! Would hate to see a major Hammond-only hotrod where you'd rip out the Space Generator and switch the Rotosonics to drums, but in the end they'd end up that way anyway somewhere down the line.

I'd really like to hear a demo of just the SPACE GENERATOR in one of these 101,102 or 103 cabs ( can't remember if it's in the 102 or if it's in the 103, but it's in one of them...and the 101 has one. the 101 was made for the RIALTO K exclusively.

[cjfox]

I particularly like Andy's suggestion of " jiggery-pokery", something I realize I've been doing all along with equipment, but lacked such perfect terminology.

[Steve_Oakland]

For what it's worth this late in the thread, I posted the service/installation/owners manual for the Leslie 102/103 a while back. Scanned it completely and posted it to SCRIBD. Unfortunately Scribd has become an E 'book' site and it went bye bye. However, if you need the scan reposted I can put it on Photobucket. As a matter of fact you might be in luck because I'm pretty certain I posted it to the PHOTOS section of the ELECTRONIC ORGAN HISTORY Yahoo group. And possibly here on the Organ Forum gallery.

I can't seem to find it on either. The yahoo page won't allow me to click the photos button. Has a grayed out "O" with a slash. I forget what that's called. And the gallery here pulls up nothing with your name typed in. :'( Anyway, I'd be grateful if you could send me that or repost it. Thanks!