[Elecraft] K1 AGC action

[Evan Roberts]

   My K1 (SN # 301) is so uncomfortable to use that I generally leave the
   attenuator  on.   Otherwise, the first keystroke of any character will
   be too loud for comfort.

   I would like to have better AGC on this otherwise great little rig.

   Last comment, How can I get display illumination on my K1?

   Evan, W5IQS
   >From: Ron ZL1TW <ron_w at clear.net.nz>
   >To: elecraft at mailman.qth.net
   >Subject: [Elecraft] K1 AGC action
   >Date: Fri, 13 May 2005 20:52:56 +1200
   >
   >Hi,
   >      I have just pulled the old K1 out and blown the dust off it
   >ready for a QRP Sprint coming up on 80m here this weekend, and while
   >the set seems to work fine in most respects I can't help but wonder
   >if I have a problem with the AGC.
   >If I (say) call CQ and a strong station answers me, I get an
   >enormous burst of tone from the calling station for the first letter
   >he (she) sends, and then the AGC kicks in and everything is sweet
   >again. ( until there is a pause in his/her sending)
   >  It has always done this since I built it some 4 years ago, and
   >before I got the K2, I used to put up with it, but in hindsight, I
   >have to wonder if it is "normal".??
   >I realize the AGC is a pretty basic setup in the K1, but would be
   >interested to know if I have a problem ? It sounds to me like the
   >AGC is waiting for a capacitor to charge before controlling the gain
   >of the mixers. I seem to recall there was a mod to make C31
   >something like 1uf and having a resistance in series to speed up the
   >AGC action, and I think that is in the set.
   >I would be interested in comments from other K1 owners.........at
   >the moment I think I will use the K2 @ 5w tomorrow, to save what I
   >have left of my hearing.
   >73.......Ron ZL1TW
   >
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