Not what I thought it was but performs the same action as I suspected
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Top Gun CP-1 Undressed
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- Start date
Nice!
Too bad there isn't an undressed TG-1 (Top Gun) module.
IIRC, they were the only company to make a true asymmetric modulation circuit that worked!
Too bad there isn't an undressed TG-1 (Top Gun) module.
IIRC, they were the only company to make a true asymmetric modulation circuit that worked!
The MD-1 has been talked about and covered. Works like an automatic(AGC) heavy swinger NPC mod.
What I initially thought the CP-1 did was very similar to the way the K40 mic processor did. The K40 processor has a pair of diode flipped with a resistor and cap all in parallel in the feedback loop of an opamp. It’s a clipper/limiter that when pushed hard starts to distort and some of the guitar guys used this clipper arrangement to add fuzz/distortion to their guitar sound. Anyhow, since the CP1 has you remove the feedback resistor and add their circuit it is fundamentally a clipper similar to the K40
I think the later k40 schematic is not correct,
if you carefully put the tone switch between high & low it disconnects the capacitors & resistor leaving only the back to back diodes & you get a setting that's louder with a more full range sound,
that can't happen the way its shown in the schematic above,
the original schematic had the switch on the opposite side of the capacitors wired correctly,
to fix the schematic above remove the link between switch common & high tone.
if you carefully put the tone switch between high & low it disconnects the capacitors & resistor leaving only the back to back diodes & you get a setting that's louder with a more full range sound,
that can't happen the way its shown in the schematic above,
the original schematic had the switch on the opposite side of the capacitors wired correctly,
to fix the schematic above remove the link between switch common & high tone.
I need to pull values but I thought it would've been a back to back layout and not like a diode string. Diodes in the feedback path of the opamp is considered soft clipping.
Values were different but nice to know the diode make up. Forward voltage is 0.255v and forward bias was 82k reverse bias 19M. Added a switch to bypass.
Shadetree Mechanic
Delaware Base Station 808
2950 Top Gun CP-1 Compressor
Been wanting to do a before and after for a while now. Did the NPC to the radio adjusted the resistor for 90-100% negative modulation and limiter in tact. Audio generator was kept the same through the videos till the last video. Second video was taken with R171 removed (limiter circuit). Last...
I say better to play with feedback resistor and cap values