[Moon] switching HV

[Bob Kocisko]

HNY to you & your family Peter.

I've considered doing what you're doing with HV on all HPAs all the time & 
just turn on filaments/grid voltages as you go to use a particular HPA. 
Since most HVPS hv a time delay to warm up filaments before turning on HV, 
how do you protect the tubes that are cold with HV on when you go to turn on 
a new HPA? I figured I could just turn off the HVPS when changing HPAs & 
then turn the PS back on & let it go thru the time delay for the new HPA 
filaments to warm up.  However, it seems like potential for human error that 
way.

Tnx & 73,
Bob, K6PF


----- Original Message ----- 
From: "Peter Sundberg" <sm2cew at telia.com>
To: "Lars Pettersson" <sm4ive at telia.com>; <moon at moonbounce.info>
Sent: Sunday, December 30, 2007 3:03 AM
Subject: Re: [Moon] switching HV


> Just connect the HV supply to all amps, no need to switch. The HV won't 
> damage
> a tube that has no heater or grid voltages switched on.
>
> Be careful, keep fingers out of "cold" amps..
>
> 73 de Peter SM2CEW
> www.sm2cew.com
> http://blog.sm2cew.com
>
>
>
>
> At 10:48 2007-12-30 , Lars Pettersson wrote:
>>
>> I`m looking for some information of a safe way to switch the High voltage
>> between Amp`s.
>> My Voltage = 5Kv DC
>> I do have some BIG 3 phase switches but im not sure about the isolation, 
>> so
>> if somone have some good solutions it would be nice.  Cold or Warm
> switching!
>>
>> And a HAPPY New Year.
>> With lots of CW EME
>>
>> 73 de Lars SM4IVE
>>