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

[Ian White, G3SEK]

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

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