[Elecraft] Finally? resolving AGC activation from Broadcast stations

[Marteinn Sverrisson]

Finally? resolving K2 S-Meter activation from broadcast stations

Wayne Burdick, n6kr, pointed out to me that taking the 
I.F. Out from 2nd Xfilter
would result in BFO leakage into the AGC mixer making the
AGC action no better than audio derived AGC. 

I built a new 2nd Xfilter using two 4.9152 crystals and 12pf cap 
(this is just a copy of the 2nd Xfilter in K2, in SSB mode), 
and put it in place of  C181.

  -----XTAL------XTAL----
              |
	      = 12pF
	      |
	      gnd

The filter cleans up the IF signal and eliminates the AGC activation from
the broadcast stations and does not sound bad, no "ploppy" sound
on SSB or CW signals.

I have observed strong, S9+40dB, broadcast stations below the 17m band and
now there is  no AGC activation from them now on the hamband, 
before I had the S-meter on S5 with no signal, SSB mode.

73's 
Matti, TF3MA