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RE: AM antenna switch for 5kW ?
To: CRTech <crtech@crtech.org>
Subject: RE: AM antenna switch for 5kW ?
From: RADIO DOCTOR <lylehenry@fastmail.fm>
Date: Fri, 11 May 2018 20:01:52 -0700 (Pacific Daylight Time)
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In-reply-to: <001901d3e98b$9aa077d0$cfe16770$@pilgrimradio.com>
References: <alpine.WNT.2.10.1805111649050.3300@Lyle-Dell-D630> <001901d3e98b$9aa077d0$cfe16770$@pilgrimradio.com>
User-agent: Alpine 2.10 (WNT 1266 2009-07-14)
Thanks, Bill.  Those look good.


On Fri, 11 May 2018, Bill Hurne wrote:

Forgot to mention these contactors have position auxiliary contacts that can
be wired into the transmitter's interlocks to prevent energizing the
transmitter not connected to the antenna.

http://www.kintronic.com/shop/40-amp-contactor/

Bill

-----Original Message-----
From: lylehenry@fastmail.fm@mail.messagingengine.com
[mailto:lylehenry@fastmail.fm@mail.messagingengine.com] On Behalf Of RADIO
DOCTOR
Sent: Friday, May 11, 2018 5:20 PM
To: CRTech; PUBtech
Subject: [CRTech] AM antenna switch for 5kW ?

What remote control switches are being used for AM nowadays?  Shielded
for coax or open relay(s) on a panel/board?  Controllers?  Automatic?

4 Port would be nice so dummy load would be connected to the transmitter
that's not on the air.

The transmission line is a 1/2" late 1980's version of the current 1/2"
CableWave (RFS) LCF12-50J.

What's best for jumpers?  Should I bother with connectors or just wire
it up?  Transmitter will probably be 7/8" EIA output, but DIN connectors
might be nice for hooking everything together.  Is there a 7/8" EIA to
appropriate size DIN adapter.  I've never used DIN connectors anywhere.

Being an FM Guy, I've rarely dealt with real AM.  Always tried to keep
AM at least 50 dB down :)

Thanks mucho for your comments and suggestions.  ...Lyle


FMeXtra digital SCA systems - encoders and receivers
SCA/FM/FMeXtra radios: fixed & tunable-wood cases-nice sound
Sidekick SCA generators - 67/92kHz-checked and calibrated
--------------------------------------------------------------
  Lyle Henry, CPBE  THE RADIO DOCTOR  K9DKW  Los Angeles, CA
SCA Consultant:  Brazil, China, India, Mexico, Taiwan, SE Asia
       323-660-4690 Home/Office     213-880-4690 Mobile
--------------------------------------------------------------


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FMeXtra digital SCA systems - encoders and receivers
SCA/FM/FMeXtra radios: fixed & tunable-wood cases-nice sound
Sidekick SCA generators - 67/92kHz-checked and calibrated
--------------------------------------------------------------
  Lyle Henry, CPBE  THE RADIO DOCTOR  K9DKW  Los Angeles, CA
SCA Consultant:  Brazil, China, India, Mexico, Taiwan, SE Asia
       323-660-4690 Home/Office     213-880-4690 Mobile
--------------------------------------------------------------

References: AM antenna switch for 5kW ?
(RADIO DOCTOR <lylehenry@fastmail.fm>, 12 May 2018 00:20:15 -0000)
RE: AM antenna switch for 5kW ?
("Bill Hurne" <billhurne@pilgrimradio.com>, 12 May 2018 00:53:26 -0000)
Prev by date: RE: AM antenna switch for 5kW ?
(Bill Hurne, 12 May 2018 00:53:26 -0000)
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(RADIO DOCTOR, 12 May 2018 03:10:52 -0000)
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