[Elecraft] K1 - 40m strong signal performance

Mon Mar 22 18:30:01 2004

Hi

On the 3 K1's I have built I change C31 and C67 to 1uf. This helps =
reduce the first dit blast in the ear

Don Brown
KD5NDB
  ----- Original Message -----=20
  From: Mike Morrow<mailto:[email protected]>=20
  To: Kevin Danks<mailto:[email protected]> ; =
[email protected]<mailto:[email protected]>=20
  Sent: Monday, March 22, 2004 4:45 PM
  Subject: Re: [Elecraft] K1 - 40m strong signal performance

  Kevin Danks wrote:

  > I've been playing with my newly completed K1 and I've noticed that
  > strong signals on 40m often cause a strange squawking sound
  > on the start of the first morse character received, almost like =
chirp.

  > Am I right to assume this is an AGC issue, and that changing C31
  > to a 1uF could be the answer?

  Kevin, that would be my first guess.  I haven't noticed what you =
describe on my K1, but then I changed RF-C31 to 1 uF very shortly after =
building my K1 in late 2000.  I think a .47 uF C31 might even be better. =
 I don't know what the rationale is behind having such slow AGC action =
as is caused by the 2.2 uF in the stock design.

  You might want to use the menu to turn off the AGC to see if that =
lends credibility to you diagnosis.

  73,
  Mike / KK5F

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