Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Lorne -
First step is to reseat all the cards. The low voltages and currents
just don't have enough energy to burn through even the thinnest
corrosion films.
The frequency jumping is possibly the U1 IC, MC14016 on the Parent board.
The dial misalignment is the easiest one. There is a flat metal lever
on top of the PTO gearbox. If you press that lever, it disengages the
large dials from the PTO shaft, allowing the dial plate(s) to be rotated
freely and set to the correct frequency.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs
<www.k4oah.com>
Lorne Barber wrote:
"Lorne Barber" <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Hello, I am new to the list and I am having a PTO problem on a "new to
me" TR7.
Please excuse me if this has been covered before. I done a very
cursory check in the archives without much success,
My problem is two fold.
First the TR7 jumps freq both during RX and Tx by a +200 hz approx.
I have done the usual adjustments re 10 v reg, passband tuning etc.
The second problem is mechanical. The digital readout and the
mechanical dial do not agree. The usual attempts at adjustment from
the front panel are not successfull. There is not enough "correction
range". BTW I do know the digital reading is correct.
It seems as though one of the dial drive gears may have jumped a
tooth. I can not find a drawing in the maint manual that I have.
I do not want to get too involved until I have a little more information.
Can someone on this list refer me to a site where this may be covered?
Thanks in advance.
7 3
Lorne
VE7BOX
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