Re: [drakelist] R4B Calibration adjustment

[Garey Barrell]

Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Peter -

If it's that way on ALL bands, the dial disc can be "disconnected" from 
the lead screw to allow it to be re-centered.  If it's only off on one 
band, you could have a band crystal that has shifted.

If you look at the shaft of the large nylon gear on the front of the PTO 
gearbox, the hole it goes through is elongated, and the shaft is pulled 
toward the PTO leadscrew by a spring.  If you hold the dial disc with 
your fingers and push "out" on that shaft, the gear will be disengaged 
and allow you to position the disc correctly.  Release the shaft and the 
gear will re-engage.   Get it close, and then the disc CAN be slipped on 
the shaft by holding the edge of the disc with your fingers and turning 
the main tuning knob.  It's VERY hard to move, especially when it hasn't 
been moved for 30 or so years, but it will slip enough to get it exactly 
centered.

73, Garey - K4OAH
Glen Allen, VA

Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs
<www.k4oah.com>



Peter Holtham wrote:

Peter Holtham <[EMAIL PROTECTED]> made an utterance to the 
drakelist gang
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Guys

My R4B has run out of calibration adjustment. The red slider to the 
right of the dial is hard over to the right, hence the line on the 
dial window is hard over as well.

Is it possible to line things up in the middle again easily?  Is there 
some sort of friction clutch in the dial mechanism? I tried moving the 
dial plate without any success, but didn't  try to hard in case I 
messed things up.

Thanks

Peter, VK4COZ





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