[Amps] question for you experts...

[Carl]

Its there strictly for safety in case the plate blocking cap shorts. It will 
then short B+ to ground causing a fuse to open before self 
destructing....theoretically anyway.

Anything from 1 to 2.5MH (even more) is OK.

Carl



----- Original Message ----- 
From: "Kathy Bookmiller" <wb2aio at yahoo.com>
To: <Amps at contesting.com>
Sent: Tuesday, March 27, 2012 5:10 PM
Subject: [Amps] question for you experts...


>I was doing some checking out everything on my amp. (NCL2000) and noticed 
>that the 2.5mh choke that is after the loading capacitor in the amp. was 
>open-connection/wire is gone. Looking at others amps., I see they all have 
>them-it would be rfc3 in a SB200, 1.1mh., for example.
> Since they are in all amps, at least tube ones, what is it for? My guess 
> it is to short out the HV if the coupling cap. shorted coming from the 
> plates, but if I'm right, it doesn't seem heavy enough for a good power 
> supply not to just burn it up and keep on putting the HV on the 
> antenna/output.
> I think I can save the one in my amp. if I can get the paint off the wire 
> by scrapping or chemicals and reconnect it, but by doing this, I'll 
> eliminate one of the 4 sections on the choke, but doubt that change in 
> value would be a big problem?
> Enlighten this poor QRPer,
> Kathy W2NK
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