Check out this URL. It's at the TenTec Wiki. Just replace the capacitors with
doorknobs. I got mine from e-bay, but haven't done the mod yet. Enough of the
right guys on this reflector say it's the thing to do for me to believe it.
Dave
WA3MKB
----- Original Message -----
From: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Saturday, February 7, 2009 5:49:07 PM GMT -05:00 US/Canada Eastern
Subject: Re: [TenTec] Ig drift on amps
On Sat, 7 Feb 2009 16:09:07 -0600, Duane Calvin wrote:
>Yes, Ron, I've experienced the same symptoms in my 238B
Ten Tec uses N1500 caps in the 229 and 238 tuners. Some matching
conditions cause these caps to carry a lot of current, enough to
cause them to change value by a fair amount. There are also matching
conditions that cause them to burn up. I run 229s and 238s with my
Titan during contests at the 1.2 kw level. I own six of these
tuners, and I've fried at least one cap in all but one of them.
On the oldest of my tuners, a 229B, I had enough heating around the
front end of the rotary inductor to toast the spring that holds the
traveling tap in contact with the inductor. I managed to repair it
with a replacement spring that I found in a surplus house.
73,
Jim K9YC
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