K3 chirp

[Poul Erik Karlshøj (PKA)]

Just to close this subject maybe.

In addition to the chirp I found on my K3 on 3526 kHz I was told by others (Bruce N1LN) that they had found chirp on 14030.5 kHz. Bruce cured it by adding a resistor+capacitor to the Synth Board and load a specific f/w file and Bruce praises the support from Elecraft!

I checked mine, and indeed I also found chirp in a 400 Hz range around 14030.6 kHz. It was even worse than the 80m chirp and over a much wider bandwidth - it sounded real bad.

I then first soldered in a 55 ohm resistor on the KSYN3 board across R20 (as I was originally told to try by Gary). It took away the chirp on 80m but did not improve much on 20m.

I then received the specific f/w file hfpf0108.hex from Elecraft and also the suggestion to solder in a resistor + capacitor combo to terminate the xtal filter on KSYN3. I decided to try the f/w upgrade first without this termination, since I was not too happy with soldering on the KSYN3 board. I placed the hex-file in the directory with the (latest) firmware files and loaded all new files into the K3 and ran the VCO MD Cal. This eliminated the 20m chirp problem.

I have not yet checked every band and every frequency - which requires about 6000 measurements where you have to tune both the K3 and a separate rcvr ;-)

The solution of this problem gives me good reason to also praise Elecraft support!

73/OZ4UN
Poul-Erik
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[Merv Schweigert]

Have for sale an excellent, still has plastic cover on the headband,
Heil Proset Plus,  it is the IC model,  It plugs into the K3 rear
mic jack and headphone jack and works very well.
It has the full sound IC element and the HC-4 element switchable.
Prosets are 150.00 Proset plus 190-200

There is a small spot on the cord looks like it was
touched with a solder iron, minor, new cord from
Heil is 8.00 if you want it to be perfect.
Will sell for 125 plus shipping.  Contact off list please.
Only used a couple times and tested on my K3.  Reason for
sale, I have a proset and yamaha 500 and several other sets
just too many.
73 Merv KH7C
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