Well. I realized I confused a PNP version Data Sheet similar to BF763.
BF763 has an NF of 5DB at 800MHZ. Most likely will not due. All that
is left- is to investigate SMD PNP transistors that are of newer design.
I have an opportyunity to get 500 pcs of 2sc1730L cheap. I will just buy it.
Next is to use my Cobra 139xlr 858 as a test bed. Want to play with the "Clipper Circuit". Looking at CBC speech processor currently available.
Could not help noticing the similarity in the 858 circuit. 2 x 914 diodes.
The mic gain in the 139xlr actually controls the Clipping level. My trc457 is strong
and clear with the clipper removed and using a Turner 3B +" Compression Mic".
Fallowing 399's suggested mod with a capacitor value change. But the Defom Power Tweak Mod on the Audio circuit. Which removes the Diodes out of the circuit and changes resistor values and adds one. A no no for a purist "399".
What about. a 12DB Op Amp after the Clipper Filters in the 858 to the audio chip?
Okay I'm sold on the 2sc1730L. My Trc 457 recieve on SSB with Shotky Diodes
sounds quieter and just as sensitive to my Cp2000B maybe better. Am oh well.
Let me finish this 7.8MHZ filter experiment LOL ! The CP200B uses a compressor.
the 858 has it beat already. If it works the above experiment. Will put the Trc457 diodes back in !
2sc1730L it is !
