[450] fw: Re: [222Activity] New 220 mHz Rig

[Robert Busino]

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 From: "Marshall-K5QE" <k5qe at k5qe.com>
Sent: Friday, March 10, 2023 5:46 PM
To: 222Activity at groups.io
Subject: Re: [222Activity] New 220 mHz Rig   
Hello to everyone in the 222Activity group.  Consider giving yourself an 
advance Christmas present.....

For your Christmas shopping pleasure, we have
http://q5signal.com/index.php?route=product/category&path=62   There are 
transverters for 25W, 50W, and 100W.  I have the 25W version as that is 
plenty of drive for my SSPA to get to almost full power.  If you purchase 
one of the higher power units, you will just have to "kill off" the extra 
power with an attenuator to drive your SSPA amp.  If you have a big tube 
amp, you might need the high power.

I have a friend(Russ-K5RUS k5rus at bayou.com) that has available a small 
number of Harris TV trays.  These will put out 800W on 222 going away.  I 
sent one of these to HI so that we could get that state activated on EME.  
It worked perfectly.  Peter-KA6U uses one of these for his EME rover on 
222. 

Russ also has a small number of the Harris TV trays that he has re-tuned to 
2M.  So if you are interested in 2M, there is a source.  

You will need a good 50V power supply like the HP blade server supplies 
available on eBay.    Part numbers are 253232-001 and 226579-001.  I just 
searched eBay..there were four of the first part number, one for $55 and 
one for $75, and two ridiculous prices.  You can also build up a very nice 
50V supply by series connecting 4 12V(nominal) switching power supplies.  
You must get units that are completely isolated and will put out 50+A.  You 
can set each one at +12.5V and you will have 50V.  I did this once as a 
project.  I bought 5 each +12V at 50A switching supplies.  Four were connected 
in series to give 50VDC and the fifth was used to provide +12V to radios, 
transverters, and whatever that needs +12V.  These supplies have a small 
adjustment pot that will allow you to vary the output voltage from about 
+12V to about +14V, so you can cover a lot of situations.

There are NO relays in these TV trays(they were built for TV transmitting), 
so you will have to provide your own T/R relays and if you plan on a 
preamp, you will have to sequence them properly.

I just talked to Russ on the phone.  He is currently swamped with a school 
activity that he does with his son, but in about 4 weeks, he says he will 
be free to put some time into these amps.  Price quoted is $350 each plus 
shipping.  That is a STEAL!!  I have never seen a QRO VHF amp that was less 
than about $2500-3000.  Maybe there is something out there, but it won't be 
$350.  So if you are interested, send him an exploratory email now, but 
don't expect him to deliver anything for about a month. 

NO, I don't have any financial interested in these amps, I just want to get 
more 222 ops on the air with some power.  Actually, I have a selfish 
interest here....I want more guys on with power that can work me in the 
ARRL EME contest on 222.  Even if you don't have elevation, you can work us 
on your rising or setting moon.  Most folks don't realize that this can be 
done, but it is straightforward and it will get you a new state or two on 
222.

Best of luck to everyone....

73 Marshall K5QE  

  On 3/10/2023 8:32 PM, Chris Smart wrote:

Looks like a new 220 mobile is coming from Alinco.  

https://electric.garden/alinco-division-ph3/vhf-fm-transceiver-dr-cs25  

   

   

73,  

Chris  

   

VE3RWJ on qrz.com  

Follow Me On Twitter  

  
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