[Boatanchors] Electronic T/R Switch vs Coaxial Type

[Greg Mijal]

Here's something to consider with electronic TR switches.
I built Lou McCoy's single tube TR switch from his old novice pages in QST.
The thing put 2 watts of RF into my SX 73 receiver it was hooked up too.  I
looked over my job and decided that it was wired correctly then tossed the
whole thing into the closet.
Met Mr. McCoy at the Flagstaff AZ hamfest a few years before he passed away.
Friendly guy for sure.
73's
Greg
WA7LYO
KJinston NC
----- Original Message -----
From: "Kenneth D. Grimm, K4XL" <grimm at sbc.edu>
To: "boatanchors" <boatanchors at mailman.qth.net>
Sent: Wednesday, November 05, 2008 10:49 AM
Subject: Re: [Boatanchors] Electronic T/R Switch vs Coaxial Type


> Carl wrote:
> > Thats like saying all motorcycles have 2 wheels so they must perform
> > the same!
> >
> > The 2 tubes arent even close in specs. Johnson used some engineering
> > smarts and the ARRL was just being the ARRL.
> >
> > Carl
> > KM1H
> >
>
> Yep, your're right!  The Johnson TR switch, in addition to switching,
> was designed to fry bacon...or your hand, if you were careless.  That
> puny little ARRL 12AU7 version would only keep your buns warm.  :-)
>
> Ken
> K4XL
>
> _______________________________________________