[Amps] question for you experts...

[Lennart M]

Being far from an expert but a ham for more than 50 yrs and having spent my
entire life working with RF I would say:
A DC short circuit at the output of an amplifier (with lethal plate voltage)
is a must.
Many transmitters operates in an on/off mode. At no circumstances there
should be a chance for plate high voltage to appear at the antenna
connection. Why? Obvious!
In some cases DC build up at the antenna port may ruin the out/input of a
TRX.
This DC can come from large antennas acting as antennas for thunder storms
passing by. Always keep antennas at DC ground - all the way from the antenna
switch to the transceiver.
Period.
73
Len
SM7BIC
-----Ursprungligt meddelande-----
Från: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] För
Carl
Skickat: den 28 mars 2012 16:13
Till: garyschafer at comcast.net; 'Kathy Bookmiller'; Amps at contesting.com
Ämne: Re: [Amps] question for you experts...

Im far from waffling Gary if you actually read what I said.
Believe what you want but understanding a bit of the history of its use and
general acceptance might help temper your comments.


----- Original Message ----- 
From: "Gary Schafer" <garyschafer at comcast.net>
To: "'Carl'" <km1h at jeremy.mv.com>; "'Kathy Bookmiller'" <wb2aio at yahoo.com>; 
<Amps at contesting.com>
Sent: Tuesday, March 27, 2012 10:20 PM
Subject: RE: [Amps] question for you experts...


> Well Carl, which is it? You seem to be waffling both ways.
>
> The only "safety benefit" that the choke offers is it keeps the DC voltage
> at zero on the output terminal of the amplifier so you won't get zapped if
> you should touch the antenna connector or an antenna connected that does 
> not
> have DC continuity in normal operation.
>
> 73
> Gary  K4FMX