[SignalOne] Looking for a Round Tuit

[jerry]

So - a few projects on my CX7A.   Need to do the modification to fix the 
injection level at the product detector, but since the radio was working 
and all together, I was reluctant to dive back into it.

HOWEVER - the tuning has changed.  The screen current keeps wanting to 
go off the scale, and I am having trouble getting decent output and 
keeping it below 12.
I suspect that the parallel resistors that I put on the power supply 
board to sense the screen current have gone off value.  They are 
metal-film, and I thought I'd get away with it because I doubled the 
wattage.  Maybe not.  Gotta get into it & measure that resistance.  The 
original one had gone from - IIRC - 100 ohms to 180 ohms.  That resistor 
has a hard life.

I am also working on the screen protection circuit described in the S1 
newsletter Volume 3, #3.  Instead of building it on perfboard and the RF 
dectors on terminal
strips, I am doing three proper circuit boards, designed on KiCAD.  
Double-sided boards, ground planes both sides, solder mask, silkscreens. 
  Surface
mounted parts to keep them small, through-hole parts where it makes 
sense.  Double row IDC connector on the amplifier board.  Ten-turn pots 
for the adjustments.

All three boards ( amplifier board and two RF detector boards ) fit in a 
single snap-apart board that qualifies for the cheap deal at JLCPCB.  
Two bucks for five boards, plus $1.50 shipping.

                       - Jerry, KF6VB