[Central-Electronics] Central-Electronics Digest, Vol 81, Issue 1

[dave plowman]

Jimmy
You are probably getting lots of good feedback but just thought I would 
offer my suggestions
I think your question pertains to the antenna relay portion of the hookup.
There is an outlet on the back of the 200V marked "To Antenna Relay 115 VAC.
Wire a standard AC plug from that receptacle to power the 115 VAC Dow 
antenna relay when the 200V is keyed.
The contacts on the relay are normally open.
You will need to wire one set of contacts to key your amp and wire another 
set of contacts to mute your receiver.
You will have to review your receiver manual for instructions on how to set 
up the mute function.
I build a small switch box using a Radio Shack plastic project box(the small 
black one), put a RCA jack at each end and a toggle switch on top and wire 
it up inside, this box will allow you to disconnect the amp keying circuit 
whenever you want to without turning the amp off. I always switch the amp 
out of the keying circuit when I am initially tuning up to make sure the 
drive is what I want and the antenna tuner is adjusted for minimum swr then 
I switch the amp back in and double ck everything, in my case I usually have 
to fine tune the tuner a little at this point.
Also, there will times when you just don't need the amp and with the switch 
you can just remove it from the circuit quickly.
I use shielded phono cables, already made up from Radio Shack, for this, 
leave the RCA plug on one end of the wire and cut it off from the other end 
as you will be connecting this end to the Dow relay amp contacts by 
soldering them on.
Now when you key the mic the relay will be energized, muting the receiver 
and keying the amp relay if it is switched on.
Hope this helps.
Dave
W4PBU


----- Original Message ----- 
From: <central-electronics-request at mailman.qth.net>
To: <central-electronics at mailman.qth.net>
Sent: Thursday, February 03, 2011 12:01 PM
Subject: Central-Electronics Digest, Vol 81, Issue 1


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>   1. 200V driving aCollins 30S1 (Jimmy Green)
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> Message: 1
> Date: Wed, 2 Feb 2011 14:37:31 -0600
> From: "Jimmy Green" <tomcatham at hughes.net>
> Subject: [Central-Electronics] 200V driving aCollins 30S1
> To: <central-electronics at mailman.qth.net>
> Message-ID: <638E8B611CB6487DA02C5A0EBB6CCBB7 at Dell270>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Please give me a litle help, the 3 connections on the 30S1 are RF in from 
> the exciter, Antenna relayand ACL.
> The 200 V power out is know problem.  I had plan on using a 115 dowkey 
> relay on the back of  the 200v.  I do not have ALC so will need to watch 
> mic gain (I think). Now the antenna relay need help.
> I would very much appreciate the forums imput.
> Thank You
> Jimmy K5CSU
>
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