[AMRadio] Shorting stick

Donald Chester k4kyv at hotmail.com
Sat Jun 3 11:15:28 EDT 2006

>"Mike Dorworth, K4XM" <k4xm at arczip.com>
>On a BC-610 using a external VFO, just kill exicitation, ALL METERS fall to
>ZERO, the B plus will go to 4000 VOLTS and if you have bypassed the
>interlock and touch the link you will be GONE, Forget the meters! Trust the
>stick!  I know!

As I recall the 610 doesn't have a plate voltage  meter.  Every rig should  
have one.  Even though it can fail, it offers one more stage of redundancy 
of protection.  When I shut off my plate supply and see the plate volt meter 
slowly drop back to zero, I can be 99+% sure there is no high voltage.  On 
my rig, all the grid and plate current meters drop to zero key-up on CW as 

That's one reason why all my HV supplies shut down on standby.  I don't like 
the idea of HV silently lurking in the rig when it's not in use.  If I ever 
did slip up, I think I would have a better chance of survival discharging a 
capacitor through my body, than serving as a load resistor on an active 
power supply.

Besides, keeping the HV on all the time often generates noise and hash in 
the receiver.

Don k4kyv


This message was typed using the DVORAK keyboard layout.  Try it - you'll 
like it.

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