hammond LSI organ schematics help

[audioforge]

recently someone gave me hammond cougart parts.the organ have been totally disassembled by this guy and he didn t keep the connecting wires....
i want to rescue the reverberation unit.
it s the classic accutronic springreverb type 4 tank. but without any number (except 4U2 ink stamped on the stamp) the 2 coils seems to be the same but the colors are faded and look white but they could have been  yellow in the past..) this does not match the accutronics coil chart impedence found on the accutronics site.

with the reverb come the driver pcb .its the part 124-000166.
according to this link http://celedoniaorgan.netfirms.com/cosco/nfoscomm/catalog/product_info.php?cPath=47_38&products_id=280&osCsid=a5ecc4553550964c86edf0608b47a254

it have been used with a lot of 70 area hammond lsi type organs...
but i can t find any free schematic for thoses (Used in 126 Romance Series, 1100 and 1200 Phoenix Series, 2100 and 2300 Concorde Series, 4000 and 4100 Regent Series, 5100 and 5200 Maverick Series, 7100 Cougar, 8000, 8100 and 8200 Aurora Series, 9100-9600 and 9900 Dolphin Series, 11000 Grande Series and 16000 Monarch Series organs)
the psu unit is dead .so could someone here have a schemo for one of those organs or at least know the input wiring of this pcb .what voltage needed !.etc...
btw all the transistors are labelled with hammond propriotary numbers and are so old i can t read the numbers anymore..

so your help is needed ...any infos welcome...
audioforge

 

[stickjam]

I think the Hammond X-5 may have used the same tank.  http://www.captain-foldback.com/Hammond_sub/schematics/X5.zip

Look at images 032 and 033 for schematic of reverb driver and pickup amps. 

-Bob

 

[audioforge]

thanks Bob ;
i ve looked thoses schematics last week. and it s not the good one.
the 124-000166 pcb was on older hammond models than X5...
no ic on it.

 

[RodC]

I know this is old but I just had to trace this myself, wanted to post it here incase anyone in the future gets one of these units.

The board has 9 Pins on the edge connector:

P1 & P2  tied together = + signal Out
P3 = B+ (I'm guessing around 15V
P4 & P5 tied together = Ground
P6 = Input
P7 = Input
P8 = Ground
P9 = Input

The 3 inputs are mixed via 33K resistors into one signal



P9 = Input

 

[audioforge]

Hi Rod
124-000166 pcb have a "7 "pins trace botton connector (i used a 10 2.54 connector to adapt the card) and a 4 one on the upper side.
see the pic here http://celedoniaorgan.netfirms.com/cosco/nfoscomm/catalog/product_info.php?cPath=47_38&products_id=280&osCsid=a5ecc4553550964c86edf0608b47a254

do your card is a 124-000166  ?
as far as i remember up connector pins are (view from components side)
left to right
1 output tank return
2 output tank ground
3 input tank
4 input tank (thru 220uf cap)
botton connector
P1 large pin equal 2 connector) signal out
P3 b+  15 to 18v
P4/5  ground
P6 and 7 inputs thru 33k
P8 ground thu 1k5
P9 input thru 33k

i ve done a small +18v alim and  a buffer  and use 3 10k pots (one foe input vol one for the reverb out before the buffer and one output vol) can be use as signal (dry only)
signal+ reverb and reverb alone.
i think i ve add a relay somewhere to do the switching operations because i couldn t figure it with only simple switches..
it works quite well and is adapted for effect send on any modern console impedance..
hope it help
audioforge

 

[RodC]

Yes mine is a 124-000166, and if you read the post, I wasnt asking a question I was trying to answer  yours incase you didnt find a diagram.  I have mine working as well.

 

[audioforge]

Sorry Rod,reading your PM, i thought you needed i confirm your pins traces and voltage....
I m glad your unit is working.
Anyway thanks for your post.
Audioforge