Amps
[Top] [All Lists]

SV: [AMPS] SB-220 Glitch Resistor ???

To: <amps@contesting.com>
Subject: SV: [AMPS] SB-220 Glitch Resistor ???
From: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK)
Date: Wed, 29 Nov 2000 20:40:41 +0000
measures wrote:
>>>I had a look at the OE5JFL crowbar. It looks like a good idea. But  I 
>>>would still use the glitch resistor.
>>>
>>The 10 ohm resistor in the negative return has many of the functions of
>>the glitch resistor, along with the inductor in the B+ lead. Those two
>>components limit the peak surge current, and are also where the stored
>>energy from the smoothing caps ends up.
>>
>With the glitch R in the negative return, the cathode circuitry may be 
>driven to several kV by a B+ to chassis arc.  
>A typical HV-RFC has less than one ohm.  
>
You obviously haven't even looked at the circuit we're talking about...
or if you have, you haven't understood it. 

I don't know which alternative is worse.

73 from Ian G3SEK          Editor, 'The VHF/UHF DX Book'
                          'In Practice' columnist for RadCom (RSGB)
                           http://www.ifwtech.com/g3sek

--
FAQ on WWW:               http://www.contesting.com/FAQ/amps
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com


<Prev in Thread] Current Thread [Next in Thread>