The only thing that is unique to 17 meters and not used on another band is
the VCO and the bandpass trimmers C32 and C34.
The first thing I would check is the VCO frequency (CAL FCTR with the probe
in TP1), you should find a frequency near 22915 - if that is OK, rule out
the VCO and move on to something different.
Next thing to check is the soldering 15/17 meter bandpass filter. Are you
able to find a sharp peak on both bands when doing the receive alignment?
There should be a nice peak point.
If all is well in the bandpass fiilter, look at the Low pass filter for
15/17 meters - Do L23 and L24 have the correct number of turns and the
correct color core? (count the turns through the core center, not around the
outside), and do all capacitors have the correct value? Look at the
schematic sheet 3 for the RF board to most easily identify those capacitors
and their values.
Check your soldering again, and then again - particularly look for
unsoldered connections at relays K5, K6 and K11.
If all the above checks out OK, build the RF probe with the parts provided
with the K2 and start the transmit signal tracing as described in the
Troubleshooting part of the manual - let us know where the signal gets lost
and we can provide assistance at that point.
73,
Don W3FPR
----- Original Message -----
Hi all,
I just finished my K2 and have a problem on 17m band. All is working fine,
I
got about 15 watts on each band and a bit less on 10m but on 17m, the
display
shows Hi Cur and output power is less than 1 watt... It appears only on
17m
band.
I have checked solders, they seem to be ok.
Any idea ?
Thanks, 73
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