| Author |
Message |
    
Adshar64
| | Posted on Monday, May 26, 2003 - 7:37 am: | 
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Have done a mod I dug up from and old secret cb book that I have
never seen anywhere else.
Involves a mod to the AN 612 balanced modulator circuit.
procedure is
1. Remove C 207 (47pf, Comes off AN612 pin 3 to ground)
2 Replace R206 270kohm (In series with vr4 sweeper leg to AN612 pin 1)with a 39K ohm resistor. NB I used a 56k in parallel.
Had good results with better modulation reports, esp with amp on.
had slightly lower peak, but better average modulation power levels
and looked good on scope.
NB: have already total npc mod etc to this radio
incl tr24 removed,R131 was clipped on this in the past, I think this
doesnt effect anything with tr24 removed anyhow and is ok left this
way?
I'd like a technical explanation of
what this mod is all about if anyone in the know, is familiar with it. I have a idea , but welcome any comment? |
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