Randy,
I had some similar problems while building my K1. I found I had a bad solder
joint in a couple of capacitors in the Premix filter of the filter board. I
believe it was c22 but I'm not sure without a diagram to look at. My problem
was intermittent output on 30m and I believe I had low output sometimes. I
didn't find it until I started wiggling parts as a last resort.
Good luck.
Rick
WA3TUU
K1 1859
From: Randy Tompson <[EMAIL PROTECTED]>
To: [email protected]
Subject: [Elecraft] K1-4, Low Power on 1 Band only
Date: Wed, 14 Jul 2004 20:57:46 -0400
Thanks for any advice anyone can give me. I'm certainly no EE.... I've
reviewed the past couple of years of archives for this reflector, and
haven't found my exact problem spoken to.
I purchased a K1-4 on eBay, and find it has sufficient power on 3 bands,
but low power on 1 band. My seller says he'll stand behind the sale, that
he was unaware of the problem (didn't use 30 meters).
mHz Power out (OUT set for 5.0 watts)
==== =============================
7.075 5.0
10.075 1.3 (transmitting into an Elecraft DL1)
14 .075 5.0
21.075 3.8
I have good audio volume on 30 meters. Power output is correct for OUT
settings below 1.3 watts, limits out at 1.3 watts for OUT settings above
1.3 watts.
Each of the tests I've run already has failed to isolate a problem:
a. Correct capacitor value markings on C22 thru C34
b. Correct # turns on L4, L5, and L6
c. Visually inspect solder joints, L4 thru L6, C22 thru C34, C1 thru 6,
CA-CH.
d. Continuity/solder connections L4, L5, L6
e. Correct 30 meter crystal value markings.
f. Visually inspect 30 meter crystal solder joints, crystal can ground
solder joints.
g. Peak 30 meter filter trimmer caps (C5, C6, CE, CF) while transmitting
at OUT = 2.0 watts.
Again, thanks in advance for any advice...
Randy Tompson
WA4CIT
K2 1086 K1 85 K1-4 1505 (on 3 of 4 bands)
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