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 <
[hidden email]>
>To:
[hidden email]
>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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