[sdiy] looking for a weid antXque IC for a Farfisa organ

[Antti PitkXmXki]

>From: Magnus Danielson <cfmd at bredband.net>

>1968. I suspect you have a simple transistor-pair, probably a pair of 
>normal NPNs with
>common emitter. This would work nicely as a flip-flop pair in a frequency 
>divider.
>I suspect that if you look at the schematics you would find that it would 
>make sense and
>that you probably can replace it with your garden varity NPNs or PNPs.
>
>That would be my advanced guess.

Looking at schematic of Farf Pro "PP/222", I see 2 transistors, 8 resistors 
and 3 capacitors in each frequency divider. One of the caps is at the 
"input" of each frequency divider. Looking at my organ (Farf Pro "PP/221"), 
I only see the weird part and one cap (the "input" cap) in each divider. 
There's also some components on another small circuit board near each 
divider, but according to the service manual of "PP/222", they are 
components of the sustain circuit. Also looking at the electronics, it seems 
to be so. So it really would seem, when comparing the schematics to the 
electronics, that the weird part has also the rest of the components inside 
it. Luckily there's a photograph of the frequency divider on the service 
manual of "PP/222". In that picture I see, on the place of the weird part, a 
small circuit board (sticking up from the main circuit board) containing the 
divider transistors etc. My organ has the large holes for these additional 
mini circuit boards on each divider, but the weird part is soldered on 
these. I think I could actually also use a mini circuit board part from a 
"PP/222", if I find somebody with a completely broken "PP/222". I think I 
could also build that mini board myself but I'd like a simpler solution. 
However, I'm not sure if simply replacing the weird part with two 
transistors would work, or can a frequency divider work with just a one cap 
and two transistors and nothing else?

Antti