Amps
[Top] [All Lists]

[Amps] Use of Manual T/R Switches

To: <amps@contesting.com>
Subject: [Amps] Use of Manual T/R Switches
From: wlfuqu00 at uky.edu (Bill Fuqua)
Date: Thu Mar 6 18:38:27 2003
1 KW DC plate input power AM at 100% plate modulation amounts to about 3KW 
PEP output assuming 75% efficiency.

73
Bill wa4lav

At 11:36 AM 3/6/2003 -1000, Merv Schweigert wrote:


> > There were quite a few 'Electronic T/R switches' available in the late
> > 50's and early 60's, the most 'famous' of which was the B&W T/R switch.
>
>Maybe more famous was the Johnson model..  and it was good for 1 KW
>AM service.  Had some problems with "suckout" that could be cured to
>some extent by the length of coax between the amp and the the switch.
>Also used one coupled directly to the amp plate circuit with a very small
>high voltage cap.
>For some reason dont miss those so called "good ole" days.  Smell of
>released electrons was not all that pleasant.
>Merv K9FD/KH6
>
>_______________________________________________
>Amps mailing list
>Amps@contesting.com
>http://lists.contesting.com/mailman/listinfo/amps

<Prev in Thread] Current Thread [Next in Thread>