[TenTec] 238 Tuner Mod

[Jim Brown K9YC]

On Tue, 4 Mar 2008 09:55:27 -0500, Jack Mandelman wrote:

>However, instead of using 
>doorknob caps I replaced the originals with 6KV 470pF Y5P ceramics. 

It's no surprise that the original caps, which have a fairly high 
negative temperature characteristic, change value as they warm up -- 
they are SPECIFIED to do that. :)  I'm wondering if it was a pricing 
decision  by Ten Tec to use them, or if the designer was attempting 
to compensate for heat-related drift in the other direction by the 
inductor?

73,

Jim K9YC