[VHFcontesting] [VHF] KJ6KO V2 1296 Amp T/R switching
hsgorden at comcast.net
Wed Dec 17 17:39:03 EST 2008
Please re-read the first sentence!
----- Original Message -----
From: <W8ZN at comcast.net>
To: "Howard W3CQH" <hsgorden at comcast.net>; "Les Rayburn"
<les at highnoonfilm.com>; <vhf at w6yx.stanford.edu>; "VHF Contesting Reflector"
<vhfcontesting at contesting.com>
Sent: Wednesday, December 17, 2008 10:51 AM
Subject: Re: [VHFcontesting] [VHF] KJ6KO V2 1296 Amp T/R switching
> This is 1296 with decent power, do you really want to recommend UHF
> Tthere are so many mil surplus type N relays out there that it's not worth
> the chance. With the inherent SWR built in to every UHF connector, at 1296
> with 60-70w you could start melting connectors.
> -------------- Original message ----------------------
> From: "Howard W3CQH" <hsgorden at comcast.net>
>> T/R = Transmit/Receive
>> You will need a uhf relay with 3 contacts (depending on how much power
>> are running and what type of connectors you are using) - the common
>> is the input from your antenna. The Transmit side of the relay is the
>> connection of the relay and that goes to the output of the transmitter.
>> closed side of thee relay goes to your receiver input. So that when you
>> the transmitter the closed side opens and the open side closes. The
>> should be mounted inside of your transceiver or radio.. if you don't have
>> mechanical relay already installed by the manufacture of your radio, you
>> probably have some switching diodes that would have to be disconnected
>> the lines reconnected to the relay. Or the relay could be mounted on
>> mast in the same configuration.
>> I would like to suggest that you might read up on relays in the ARRL
>> Radio Handbook.. Just about every edition has information on relays..
>> 73's - I am sure that others will chime in on the subject.. de Howard
>> ----- Original Message -----
>> From: "Les Rayburn" <les at highnoonfilm.com>
>> To: <vhf at w6yx.stanford.edu>; "VHF Contesting Reflector"
>> <vhfcontesting at contesting.com>
>> Sent: Wednesday, December 17, 2008 9:15 AM
>> Subject: [VHF] KJ6KO V2 1296 Amp T/R switching
>> > Please pardon yet another newbie question, but here goes.
>> > I recently purchased a KJ6KO V2 1296 amp from a local VHF'er, along
>> > with
>> > the
>> > power supply. Hoping to increase my meager 10 watt signal to 60 watts
>> > or
>> > so.
>> > For those who are not familiar with this amp. You can find details at:
>> > http://users.innercite.com/kj6ko/forsale.htm
>> > My plan is to use my Icom IC-910H as an exciter for the amp. But here's
>> > where
>> > I'm running into trouble. This amp requires an external T/R relay...and
>> > this
>> > is all new to me. I'm running a single 1/2" hardline into the attic,
>> > feeding
>> > a loop yagi. No pre-amp (though I do have one waiting to be installed
>> > as
>> > well)
>> > My questions are legion. Where do I get a T/R relay? How do I wire up
>> > all
>> > the
>> > "in's and out's"? Can I still use the mast mounted pre-amp in line with
>> > this?
>> > Any and all help gratefully appreciated!
>> > 73,
>> > Les Rayburn, N1LF
>> > EM63
>> > Les Rayburn, director
>> > High Noon Film
>> > 100 Centerview Drive Suite 111
>> > Birmingham, AL 35216-3748
>> > 205.824.8930
>> > 205.824.8960 fax
>> > 205.253.4867 cell
>> > ------
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