At 10:25 AM 3/6/03 -0500, W8JI wrote:
>I was never able to get this system to work well on QSK, so I used a pair of
>10 watt 250 volt lightbulbs as a series limiter (they lit like flashbulbs,
>and doubled as a reminder the power was on) and a 6AL5 tube as a clamp for
>the receiver, followed by a 6J6 to make up for gain loss.
>
>I'm actually serious about this, I used this system for years as an antenna
>and TR switch. It worked quite well.
There was actually a commercial TRswitch like this that a friend and I
vaporized during an ARRL DX Contest back in the late 1950s, with a
single-813 amplifier; if I recall correctly, it used a cathode follower of
some sort for isolation and coupled to the tank circuit with a piece of
RG-8 -- sometime during the night the RG-8 flashed over and totally nuked
everything inside the little metal box the circuit was in. The miniature
tube was reduced to powder, but to the designer's credit, the receiver was
not harmed.
73, Pete N4ZR
The World HF Contest Station Database was updated 23 Feb 03.
Are you current? www.pvrc.org/wcsd/wcsdsearch.htm
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