Tnx for info George !
They can be useful in a number of RF power applications then !
I was worried about stray capacitance forming a RC
network all through the resistor. This info is useful for me
TNX
Peter
----- Original Message -----
From: <gdaught6@stanford.edu>
To: <amps@contesting.com>
Sent: Tuesday, November 13, 2007 8:14 PM
Subject: Re: [Amps] Caddock power resistors
> On 13 Nov 2007 at 19:55, Nils Petter Pedersen wrote about:
>
> And so did KM1H, and K9YC, with many snips:
>
>> The problem with the TO-packaged units is that they MUST have a good
>> heatsink.
>
>> > I never heard of them before. I see that Mouser
>> > carries the 100W version in stock. Ive just ordered a pair of 100 Ohm
>> > from
>> > Mouser and will see how they look for RF as well as how they hold up at
>> > power in a Heath Cantenna..
>
> I used some Caddock power resistors in the grid circuit of the
> "Sunnyvale/Saint Petersburg Kilowatt Plus" that appears in the 1999-
> 2004 ARRL handbooks. They are mounted on a pretty big heat sink, and
> have their own fan. This setup has been very satisfactory, and
> capacitance hasn't been a problem.
>
> The amplifier gets serious contest use, and hasn't had any problems.
>
> 73,
>
> George T. Daughters, K6GT
> See you in the California QSO Party (CQP)
> October 6-7, 2007
>
>
>
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