Dan,
It sounds like your PLL Reference oscillator quit working - so ---
Tackle Q19 first. Check the resistance from the source to ground -
should be close to 270 ohms. If not, check the soldering on R20 and
both the lead tinning and soldering of RFC14.
Once Q19 is OK, then you can go on to other points if necessary.
73,
Don W3FPR
Dan Grizzard wrote:
> Hello all,
> I have finally gotten to the final stretch of construction and have hit another snag. I had gotten the power out on all bands correct and was starting to align the filters when the VFO went out. I reworked the solder joints looking suspect on all 3 boards with no good results. I did discover the encoder had gone bad. I replaced it, aligned the filters using Spectrogram and then discovered I had NO power output on any bands! I get a HIGH CURRENT warning then .4-.5 on the display when tuning. Following the page 17 rf board vdc voltage chart all went well until I got to Q18 and Q19. Q18 G voltage rated -1.0= actual -.001 S was OK=D rated 6.3= actual 8.3. Q19 G rated 0.0= actual -.4==S rated 0.8=actual 1.7==D was ok at 8.0 vdc. Q20 checked out ok. Here I stopped and asking for suggestions.
> Thanks in advance.
> Dan af4lb
> NOTE==Q5 needed to be checked with the bottom cover off in transmit so I did not do it. Didn't want to risk frying the finals again. I do have 13.4 vdc on the case in transmit and receive.
>
>
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