The problem is not with the voltage, but with the RF current. The doorknobs
in my article have a 15 Amp rating and they're not very expensive if you buy
them on e-bay.
http://n6ie.com/Ten_Tec_238.html
Ron N6IE
www.N6IE.com
----- Original Message -----
From: "Rob Atkinson" <ranchorobbo@gmail.com>
To: <tentec@contesting.com>
Sent: Tuesday, December 29, 2009 3:53 PM
Subject: [TenTec] 238 caps
Instead of doing the tuner cap mod with doorknobs why not simply use
higher v. disk ceramics? Mouser has 8 KV 470 pF for around 50 cents
each. You can get four 100 pF 10 KV caps and string them together in
series for the 25 pF on the output for a heck of a lot less than a
doorknob (I say that because that's what I quickly found at mouser to
get 25 pF and high v.). Plus no probs fitting and mounting them.
Looks to me like the prob. with the stock caps on 160 is that they're
2 KV (probably less on that low a frequency) if I am not mistaken.
I admit I added an extra load padder cap to my Centurion on 160 that
was a doorknob but that was mainly because I had it on hand and there
was room. I would not want to buy them unless I could get them for a
few bucks each at a hamfest.
73
Rob
K5UJ
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