[Amps] RF Choke At Amp Output ??

[Ian White GM3SEK]

Bill, W6WRT wrote:
>ORIGINAL MESSAGE:
>
>On Fri, 21 Aug 2009 15:36:13 -0700, "Jim W7RY" <w7ry at arrl.net> wrote:
>
>>Why not just put a choke or 100K resistor on the output of the tank?
>
>REPLY:
>
>A resistor in place of the choke is not a good idea. If the blocking 
>cap shorts,
>the resistor will almost certainly blow open and you are right where 
>you were if
>there was nothing there at all.

Agreed - a resistor provides no protection against failure of the HVDC 
blocking capacitor.

>A choke will almost certainly blow the AC fuse
>and/or the glitch resistor and remove B+ from the output connector.
>
>It goes without saying - or should - that the choke has to be mode of husky
>enough wire to do the job without opening.

That's certainly the idea... but how many of us have ever confirmed that 
our "safety" chokes could really do that?


-- 

73 from Ian GM3SEK
http://www.ifwtech.co.uk/g3sek