[sdiy] Help! Fatman problems!

[greg montalbano]

I wouldn't imagine either of those two things would be the problem.

Since you are new to this, let me be the one to welcome you to the
time-honored pastime of TROUBLE SHOOTING -- which generally
takes more time & effort (& is, in my humble opinion, more interesting)
than the building itself.

First thing you need to determine is:
is your MIDI-to-CV working correctly?
This can be determined by plugging your MIDI controller (a keyboard?)
into the input and playing a few notes up & down, while monitoring the CV & 
Gate outputs with a meter (or another modular, if you have one handy).  If 
they are working correctly, you'll get a measurable,consistent voltage 
reading .  If not, you know to move on to the VCO section.

Let me know....

~G

At 09:56 PM 1/18/02 +0000, John Goodall wrote:
>Hi everyone,
>
>I've just plugged in my Paia Fatman having finished construction of it to
>discover it doesn't work :0(
>(It was to be expected really, it's the 1st synth I've built)
>
>Here's the problem. When I strike a key I get a very short noise coming out
>but it's very brief and to my electronically untrained ear sounds like it
>could be a really low bass note, maybe just 1 cycle of the waveform(?).
>
>Playing a higher or lower note on the keyboard makes no noticeable
>difference to the pitch, neither does changing any of the 5 trimmer
>resistors or the pitch control on the front.
>
>The 1800 ohm resistor that bridges R34(1) & R34(3) was missing from the kit
>so I ordered one from RS, it's the same value but states it is 1% (R5%).
>I've also used a blue led for the power light, I know these use slightly
>more current but that couldn't be the problem could it..?
>
>Please can someone help me? It would be great if you could advise me in
>simple terms, I am a total novice!
>
>Many thanks, John
>
>
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