>
>
>-----Original Message-----
>From: measures <2@vc.net>
>To: Steve Thompson <rfamps@ic24.net>; AMPS <amps@contesting.com>
To: <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>
To: <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,
Correct - there is no damage until cathode current flows in an
insufficienty heated cathode. .
> but does it do any damage in standby?
No
>
cheers, Steve
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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