[Elecraft] K1-4, Low Power on 1 Band only

[Randy Tompson]

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)