[Boatanchors] Electronic TR Switch?

[eldim at att.net]

Hello Eddy, Steve and Crew,
Frankly speaking, I can't figure out how a ANTENNA SWITCH can be responsible for TVI. I'm puzzled with that one.  I used a B&W Electronic Switch for years without any  known problems.  Unfortunately,  I traded it off years ago-so I can't try and duplicate a similiar incident.  I've al;ways been taught that unwanted harmonics are generated by a mis-tuned transmitter or transceiver or a exciter that is poorly designed and dosen't have parasitic suppressors.  Let's hear from the rest of the grouind with your take` on this comment.
73,
Glen Galati, KA7BOJ
Tacoma, WA
eldim at att.net

-------------- Original message from "Ed Swynar" <gswynar at durham.net>: -------------- 


> Hi Steve, 
> 
> If it's anything like the 6AH6 unit I built when I was a novice some 30 
> years ago, throw it as far away as you are able to throw it! 
> 
> Mine was responsible for the only personal visit I ever had from the 
> government licensing people, due to severe TVI the thing caused to a 
> neighbour half a block away from my parent's house... 
> 
> ~73~ Eddy VE3CUI - VE3XZ 
> 
> 
> 
> ----- Original Message ----- 
> From: 
> To: 
> Sent: Sunday, May 01, 2005 9:03 AM 
> Subject: [Boatanchors] Electronic TR Switch? 
> 
> 
> > Hi all: 
> > 
> > Picked up a nice little homebrew electronic TR switch. 
> > Now I need to know how it works..and would appreciate any info. 
> > 
> > Here are some details: 
> > Made in 1976 
> > Uses MC1741CP chip and two transistors, one being 2N2222. 
> > Has sensitivity and delay controls on front panel 
> > Back panel has 4 pin connector for Mute and +12.5, jacks for H.P. 
> > ( headphones?) " ST " and "R" and BNC's for Rcvr, Ant and Trans. 
> > 
> > Thanks, 
> > Steve 
> > WA2TAK 
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> 
> 
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> ** List Administrator - Duane Fischer, W8DBF/W9WZE ** 
> ** For Assistance: dfischer at usol.com ** 
> $$ For vintage radio info, see the HCI web site $$ 
> http://www.w9wze.org 
>