[TenTec] Titan 425 troubles, R1 and blown 20a fuses

[Dr. Gerald N. Johnson]

On Sat, 2007-07-21 at 15:32 -0700, Denton wrote:
> I have an older 220 ten tec L network transmatch I am rebuilding, and I 
> notice that ten tec uses high voltage disk ceramic paddling caps in series 
> with the main tuning air paddler...
> I notice that under some tuning conditions, the swr will drift and some of 
> the ceramic caps will get rather warm, even with barefoot power applied...
> I am wondering if substituting the original ceramic caps with 2nF type caps 
> will stabilize the swr drift.

Type COG cuts the drift. 2nF is the value, 2 nano farads, 2000 pf. To
cut the heating pick the physically largest in the catalog (like from
Mouser or Digi-Key). That will get the lowest dielectric constant
ceramic which usually has the lowest RF loss.

-- 
73, Jerry, K0CQ,
All content copyright Dr. Gerald N. Johnson, electrical engineer