[Boatanchors] HW-101 VFO problem

[Boatanchor at alliedinformation.com]

Update:

I found two loose grounds in the vertically mounted aluminum divider 
band-switch boards. If I juggled them while the unit was on, I got the 
problem of the output disappearing on 40 all together. I re-soldered them 
and now I don't get the intermittent problem...40 meters now has no output.

I also found a cold solder point on a wire going into the second board back 
from the front. But I still get output frequencies WAY off where they 
should be on 20 and 15.

Any other thoughts? Does this sound like bad crystals?

Matt, KB8WFH





At 04:08 PM 5/24/2005, Boatanchor at alliedinformation.com wrote:
>I am working on an HW-101 with a strange problem.
>
>I have aligned the receiver and it works fine ok. I can hear signals where 
>they are supposed to be.
>
>However, when I try and transmit, I get an output carrier WAY out of range 
>of where the VFO is set. Even if I set the rig in TUNE mode and change the 
>VFO while its sending out the carrier, the output frequency never changes.
>
>First, I set my VFO to 14.295. I hear a signal generated by my signal 
>generator at 14.295 (give or take a few cycles). Then I move the mode 
>switch to Tune. My frequency counter reports the output at 14.433. It 
>stays stable at that frequency even if I change the VFO.
>
>Then, I tune the VFO to 7.295. I hear a signal generated by my signal 
>generator at 7.295 (give or take a few cycles). Then I move the mode 
>switch to Tune. My frequency counter reports the output at 14.060. After a 
>few seconds, the frequency counter starts climbing back down closer to my 
>VFO frequency. When it gets close, the circuit breaker on my power supply 
>trips. Huh?
>
>15 meters seems to be pretty close to where the VFO is, but no exactly. I 
>get NO output on 80 or 10 meters at all, but that may be a separate problem.
>
>I have also just noticed these result are achieved with the bottom cover 
>place over the band switch removed. If I put it back on, I get no output 
>from 40 meters. put it on, it works fine.
>
>Why is the VFO working on receive but so far off on transmit? Any other 
>comments or places to test and try?
>
>Thanks.
>
>Matt, KB8WFH
>
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