Jerry,
I suspect the tube myself. I have the case off. The GDO is in a
subchassis and I started to take it apart but figured if I could find
the construction manual, I might save myself some grief. I think I will
take some voltage measurements which would require I remount a ground I
have already lifted. Boy, being a ham sure gets interesting some times!
This started because I wanted to see how my Antenna Analyzer was as a
frequency counter, and I have an old Cushcraft 5 band verticle that was
given to me. I tried it and it did not work! I took the first trap
apart and found that critters had found a new home. Ahh well. I am a Ham.
John Graves
WA1JG
Dr. Gerald N. Johnson wrote:
> On Fri, 2009-01-30 at 22:11 -0500, John Graves wrote:
>
>> My Eico 710 GDO has died. No response to changing coils. Dial light
>> comes on when turned on. I have found a users manual but not the
>> building manual. Does anyone have assembly or disassembly instructions?
>>
>
> My guess would include a failed tube, probably a 6AF4 UHF tuner triode,
> or a broken cable if the power supply is separate from the dipper.
> Getting into the dipper probably requires removing the screws through
> the U shaped wrapper and sliding it off the bottom. Don't take out
> screws that don't hold that wrapper on.
>
> Could be a power supply problem too, but the tube is the most likely
> failure.
>
> 73, Jerry, K0CQ
>
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