[Drake] Drifting R4C S Meter

[Garey Barrell]

Jon -

V5, V4 and/or V1, in that order.  One or more of these are gassy.  The approach is to replace V5, (with a known good tube if you have one,) 
reset the S-Meter calibration as described in Section 5-13 of the manual.  The drift will typically show up within the first 30 Minutes from 
turn-on.  If still drifting, replace V5 and sub V4.  If still drifting replace V4 and sub V1.

If you don't have a good tube, swap V1 and V5.

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73, Garey - K4OAH
Glen Allen, VA

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

k6jek wrote:
> I don't know what Dave's S meter is doing but  my R4C's meter is drifting. Set it after a warm up using a reference. A little while later, it's pegged low. Re-set it. A little while later, it's pegged low again. I think it might do this forever.
>
> I have done nothing to track this down but if one you knows that is usually caused by something you know about and wants to save me the joy of figuring it out, I'm all ears.
>
> Thanks,
>
> Jon
>
>