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@yahoo.com>
To: <Amps@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
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 10.0.1424 / Virus Database: 2113/4897 - Release Date: 03/27/12
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|