[AMPS] Filament Inrush Current Limiting

[Steve Thompson]

-----Original Message-----
From: measures <2@vc.net>
To: Steve Thompson <rfamps@ic24.net>; AMPS <amps@contesting.com>
Date: 27 April 2000 17:05
Subject: Re: [AMPS] Filament Inrush Current Limiting


>
>>
>>
>>-----Original Message-----
>>From: RCM <robrk@pgh.net>
>>To: Phil Clements <philk5pc@tyler.net>
>>Cc: amps <amps@contesting.com>
>>Date: 25 April 2000 23:28
>>Subject: Re: [AMPS] Filament Inrush Current Limiting
>>
>>
>>>
>>>What about turning down the voltage, like to half for moderate standby
>>>times (dinner). I remember
>>>reading something in some broadcast book about the standby transmitter
>>>filaments being switched to
>>>half or less voltage as in semi-hot standby..
>>
>>
>>I have a vague memory of reading something that suggested that running an
>>oxide cathode much cooler than intended can lead to 'poisoning' or
somesuch.
>>Anyone fill in on this one?
>>
>Not enough heater potential causes the oxide coating to flake off the
>cathode.
I can see that this happens if you draw current from a cathode that's too
cold, but does it do any damage in standby?

Steve


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