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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.

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.

Do you have a sample sound of each? Could you make a short clip

Strykers has been a selling like hotcakes recently. Besides the bling bling lights and cosmetic features, the output in watts seem to be very attractive. Knowing that the circuit layout is shared amongst similar radios ie Lincoln II, Anytone 6666 and alike, the PA section is drastically...

attachments are broken

I have one mic with the big switch , I’ll check same please for that switch also

Guess I’m going to the Willy Wonka factory

And the 575. There are 2 different styles in the 3 versions of 575. The bigger version is still available through Kens, however the smaller RD and 575 style have been hard to find. I hope these are the correct ones so I can bring a few back to life

I hope this is not a trip down a rabbit hole.

The 8 band from Julius is also adjustable however I think each band is in a good area as is. The EQ Plus uses 2 bands of EQ and a SSM2166 compressor circuit. MFJ tried their hand at the same but went to aggressive on the compressor section IMHO. THe UR6QW has its own sound compared to the W2IHY...

C15 and C20 would be the 3.4k branch. Adjust those values for the C1 and C2 in the formula for what you want. For 4.8k , C15 to 0.011 uF or something close, leave C20.

Each band can be expanded to whatever you want, the W2ihy is based on baxandall layout. UR6QW based his EQ on the LA3600 and it’s offspring equivalents. You can find out a lot scrubbing through application data and specification sheets.

Check the voltage on the power supply rails. The 2000 might not be as high as the 148

I removed the Sound Tracker circuit from a parts 148 I had laying around and did a side by side comparison of the Cobra compander to that of the SP1A and the Cobra had tons of distortion.

SA571DR2G

Lester is over charging for someone else’s design. I made my boards for a fraction of that price and it’s all surface mount. Only thing I left out was the relay, it is only there to bypass the SP1A.

man

Mrf454, SD1446, 2SC2290

There’s a technical bulletin regarding that. It’s a known issue