[Boatanchors] Electronic T/R Switch vs Coaxial Type

[Peter Markavage]

I've run a Johnson T-R switch on the Johnson Thunderbolt for years and
not experienced any TVI related issues. I also have a Dow-Key relay on
the back of my Apache that's been there and working since around 1960/61.
The Dow-Key on the back of my Viking II has been there and running since
1955. These relays were some of my better investments.

Pete, wa2cwa


On Tue, 4 Nov 2008 10:36:39 -0800 "BLIMPY" <blimpboy at sonic.net> writes:
> 
> Biased vac tube T/R switches have bad reputation as TVI generators.  
> Many
> in-line filters are not tolerant of impedence mis-matches expecially 
> those
> with  reactive components.
> 
> Run of the Mill Dow Key are second rate relays.. compared to Advance 
> Coaxial
> Relays.. which are available for less money and will give no grief 
> due to
> unscheduled liberation of smoke.  Some BNC commerical application  
> surplus
> relays  with dc  may be contradict this generality.
> 
> a vox type t/r switch might be a workable compromise, but not true 
> break-in
> 
> good luck
> 
> 
> _______________________________________________
> 
>