I have several pieces of test equipment.
The other night I powered it on, set it next to my gear,
then went to bed.
When I awoke the next morning the gear had neither been
diagnosed or repaired. I know that some of you like to
watch the test gear flash lights, flutter meters, and
display digits and graphs - but I was too tired for all
of that excitement.
Does this mean that I have to read the (children, cover
your ears) manual?
I'm guessing I set something incorrectly ... ;-)
> I have quite a bit of test equipment that works very well for me. I
> will not bore anyone with the model numbers. However, I will say that
> my weapon of choice to find problems in transceivers is my trusty old
> Tektronix 465B. I have some frequency counters of course to set those
> oscillators on frequency and an old fluke digital meter.
>
> I do not repair these radios for any money except parts. I am retired
> and have enough income to get by. I enjoy repairing my friends radios
> when they go bad. It is my way of giving back to the elmers who
> helped me when I was a child trying to do ham radio.
>
> I am currently working on an Icom 751A that appears to have an output
> transitor bad in the PA. I am awaiting transistors from China. They
> cost me 20 bucks a piece.
>
> The output from this radio is about 20 watts. It is a good sounding
> signal. However the output from the twin rf transistors into the big
> toroidal transformer is not equal. One side is 40 volts P-P and the
> other is 20 volts P-P. I could not figure out how this could lower
> the power that much because the normal reading is 30 volts per output
> transistor. Then I checked the phase. The radio has both signals in
> phase. They should be 180 degrees apart to get maximum power. So, one
> of the transistors is mostl likely bad. I ordered two.
>
> Michael
--
Thanks! & 73, KD4E.com
David Colburn nevils-station.com
I don't google I SEARCH! duckduckgo.com
Network: groups.yahoo.com/group/qrv
Restored to design-spec at Heaven's gate 1Cor15:22
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