[Elecraft] K3 variable power output

2008-11-26 Thread Bob Towers

Many thanks to Mike, N5WNG, and Jeff, W7BRS, for comments.

I'm measuring the output power on an external power meter and the 
internal power meter is pretty well spot on. I have a KAT3 and I've been 
doing the ATU TUNE (10W) before I key at 50W or whatever.


I noticed that the PA TEMP was set quite high (27 deg C) so I turned it 
down to 22.


I've just upgraded the firmware to 2.63 and it hasn't solved the problem!

73

Bob MM0RKT


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[Elecraft] K3 variable power output

2008-11-24 Thread Bob Towers

I'm running firmware 2.57 and I've recently noticed this...

An odd effect with the output power: it builds up from 5W to the 
dialled in power over the course of about 5 QSOs after I  change 
bands. If I stay in a band and increase the power from, say, 50 to 70 
watts, the output immediately drops to around 5W and then increases to 
70W in the next 5 or so QSOs. If I drop the power, the same thing happens.


I originally thought it might have been heating up - or something - of 
the the new balun on my Windom antenna, but it does it with a dummy load 
as well.


Any help would be appreciated.

73

Bob MM0RKT
K2 #5339
K3 #1456

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RE: [Elecraft] K3 variable power output

2008-11-24 Thread Greg
Don't know if you got a reply on this yet or not.  But try doing the TX Gain
calibration described in the manual again on ALL bands at exactly 5W and
50W.

73
Greg
AB7R


-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Bob Towers
Sent: Monday, November 24, 2008 8:07 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 variable power output


I'm running firmware 2.57 and I've recently noticed this...

An odd effect with the output power: it builds up from 5W to the
dialled in power over the course of about 5 QSOs after I  change
bands. If I stay in a band and increase the power from, say, 50 to 70
watts, the output immediately drops to around 5W and then increases to
70W in the next 5 or so QSOs. If I drop the power, the same thing happens.

I originally thought it might have been heating up - or something - of
the the new balun on my Windom antenna, but it does it with a dummy load
as well.

Any help would be appreciated.

73

Bob MM0RKT
K2 #5339
K3 #1456

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