[Elecraft] K3 SSB Power Control and ALC Metering

Kamal Sirageldin ksira at corpten.com
Wed Sep 24 22:35:12 EDT 2008


Michael,

I also see the exact same symptoms you describe below.  This is after
implementing Wayne's procedures 'to the letter.'  Firmware V2.38,  K3 S/N
775.

73,
Kam  N3KS

Thanks for the detailed information. However, this is not my problem. 

The most severe problem I have is:

a) the output power spikes and overshoots in CW or SSB or FM as you adjust
the power control, so it is not advisable to use a sensitive, i.e solid
state power amplifier with the K3. Especially not one needing less than 50W
of drive. It needs a fast responding meter to see it. 

A work around is to set the power without the amplifier in circuit, speak or
key to let the spike happen, then switch on the PA and not adjust power or
mode afterwards.

Does this not happen to anyone else?

A lesser problem is:
 
b) that the power output is unstable once set in SSB mode, showing
variations of around 50-100% in the peak output depending on the power
output setting. This is when set up as described. It is only really visible
with a peak reading power meter.



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