[Amps] HV resistor source

[Carl]

It would be nice if the resistor survived a dead short but it only need to 
limit current to a fuse opens.

I typically use 15-20 Ohm 25W for the average 1500W amp...even if it does 
2500W (-;

Dentron took a different approach with a pair of 1 Ohm 1/2W carbon in 
parallel which appears to be a bit dangerous if an arc developed.

Carl
KM1H.


----- Original Message ----- 
From: "Doug Renwick" <ve5ra at sasktel.net>
To: <amps at contesting.com>
Sent: Wednesday, April 17, 2013 11:46 AM
Subject: [Amps] HV resistor source


> Ten Tec 425 Titan uses a single 10 ohm, 25 watt ohmite wirewound.
>
> Doug
>
> "Think of all the ways you can hurt yourself laughing."
>
> -----Original Message-----
>
> That is for a glitch - the resistor limits the current in the even the 
> tube
> (or whatever) arcs and dumps the B+ to ground.  The caps will discharge
> through that resistor.
>
> I went through that sourcing a couple of months back.  Check out the 
> ohmite
> power resistors - about 4" long vitreous enamel covered 50w, if you have 
> the
>
> room.  Should do the job.
>
> 73/jeff/ac0c
> www.ac0c.com
> alpha-charlie-zero-charlie
>
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