SB104A Help

[John Hutchins]

Sb104 problems are now reduced to no 80 meter HFO outout.
The 80 meter crystal has no activity. This is on board "D"
Anyone have a board D excess to their needs or a 12.395 khz
crystal?
Thanks es 73,
John WB4NNY

brad allen wrote:

> Did the unit work at any time? if it has , construction is not an issue. I would check
> the premix output and see what the values are per band. On your schematic, there is a
> list of the premix voltages. Start there!!! next would be voltage checks of the
> regulators. I take it the relay is in fact operating on each band. You are reading these
> power readings into a 50 ohm load I hope, not your antenna. (Sorry, don't know your level
> of knowledge). Let me know the results!! Brad
>
> John Hutchins wrote:
>
> > Hi Greenies!
> > I have a SB104A with the following symptons in hi power position.
> > power output:
> > 80 mtr aprox 1watt
> > 40 mtr aprox 5 watts
> > 20 meters approx 5 watts
> > 15 meters 65 watts
> > 10 meters 50 watts.
> > I read the .65 volts on the test points on the pa board that says it
> > should be good.
> > I have the operating manual, but no construction manual.
> > Does someone have a suggestion as to where I should start?
> > Thanks in advance,
> > John WB4NNY
> >
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