Larry,
RFC15 will not cure the problem, but it is not likely missing. Direct
him to the errata page and he should see that the choke is now one with
a large body - he should install it. If RFC15 is truly missing, he can
temporarily replace it with a short bit of wire.
On the VCO problem, it should oscillate at some frequency. First have
him check the counter probe by checking for the proper reading (near
12080 kHz) at TP3 and near 4915 kHz at TP2. If he finds a reading on
those two points, the probe is working.
Back to the VCO problem - the most usual cause of failure to oscillate
is T5 - the leads should be well tinned (a bit of tinned lead should be
visible on top of the board), the turns must be correct.
He should obtain some kind of frequency reading at TP1 before being
concerned about the R30 voltage - yes, it will be at 8 volts if the VCO
is not oscillating.
73,
Don W3FPR
Larry wrote:
Hello All,
I'm helping someone who is building K2 #6196, we are talking over the
phone so I haven't been able to actually see or touch the kit.
He is up to the VCO tests and has a problem. Keep in mind..RFC15 is not
installed yet, he said its missing.
He gets at TP1 and gets 8v on all bands, across all bands at R30.
Is this related to missing RFC15? If not, what should he look at next.
Thanks
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