MOTM

Just some very quick photos of the insides of the rare Moog String Filter.
Quick observations:

a) there are 9 filter cards with 4 filters per card. Each filter has 2
trims.
b) the filter is based on the LM3900 (ack!)
c) The whole thing runs off of +12, no sign of any -12V anywhere.
d) for some reason, the leads are NOT TRIMMED on the bottom of the pc boards
(ack!)
e) no shortage of LockTite at the Moog plant

more to come, this was a 10min breaktime deal.

www.synthtech.com/pix/string_filter

Paul S.

Ok! Motm-430 or Motm-470? :-)
Enrico (Italy)
> Just some very quick photos of the insides of the rare Moog String 
Filter.

On 1/3/04, Paul Schreiber put forth:
>Just some very quick photos of the insides of the rare Moog String Filter.
>Quick observations:
>
>a) there are 9 filter cards with 4 filters per card. Each filter has 2
>trims.

36 filters??  I love analogue as much as the next guy, but imho, that 
sounds like a job for DSP.

>b) the filter is based on the LM3900 (ack!)

Isn't that what Serge uses in their filters??

>c) The whole thing runs off of +12, no sign of any -12V anywhere.

That makes sense, considering the LM3900 was designed to operate single-sided.

>d) for some reason, the leads are NOT TRIMMED on the bottom of the pc boards
>(ack!)
>e) no shortage of LockTite at the Moog plant
>
>more to come, this was a 10min breaktime deal.
>
>www.synthtech.com/pix/string_filter

Ack!!  In comparison, the MOTM pcb's look like Faberge Eggs.