[ARC5] Strange problem with racked transmitters
Kenneth G. Gordon
kgordon2006 at frontier.com
Sun Jun 28 16:14:02 EDT 2015
On 28 Jun 2015 at 3:04, J Mcvey via ARC5 wrote:
> Both transmitters work well, but one seemed to draw too much current (not due
> a resonance problem). Upon further investigation , I discovered that the
> "deselected" transmitter 1625's were conducting somehow while it's supposed to
> be inert. I proved this by leaving the offending transmitter docked with the
> finals removed. the problem went away. Tried a new set of 1625s but they also
> conducted while in standby. The select relay is OK ( both contacts open in
> standby). The other transmitter does not do this. There isn't much there to go
> wrong, other than what I have already explored.
>
> Any suggestions?
It sounds to me as though there is some sort of wiring "difference" between
the two transmitters or the rack-positions.
It is also possible that you have a shorted or severely leaking fixed capacitor
some where, possibly in a transmitter.
I'd be examining both the rack and the transmitters.
I don't think there is anything wrong with any of your tubes.
Ken W7EKB
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