[MRCA] Retransmit Project Phase 2

[W2HX]

Yes! Very important warning. I plan to use this 200W, 25 MHz low pass filter that came with the PRC-138.  That should help no?

http://www.w2hx.com/x/PRC-138/IMG_9276.JPG

Anyone know what front end protection exists with the RT-1439 using the AM-7238/39 power amp? 


 
73 Eugene W2HX
 

-----Original Message-----
From: B Smith [mailto:smithab11 at comcast.net] 
Sent: Tuesday, September 11, 2012 6:29 PM
To: W2HX; mrca at mailman.qth.net
Subject: Re: [MRCA] Retransmit Project Phase 2

Beware of running high power and having two separate antenna systems, an easy way to blow a front end unless the receiver is  protected.  Some systems have built in protection - - - I have an HF  set on the bench that has front end protection up to 50 volts but I prefer not to test it. 
:-)

Z

--------------------------------------------------
From: "W2HX" <w2hx at w2hx.com>
Sent: Tuesday, September 11, 2012 5:47 PM
To: <mrca at mailman.qth.net>
Subject: [MRCA] Retransmit Project Phase 2

> Hi all,
>
> The other day I posted my limited success in getting a 20W HF radio
> (PRC-138) interfaced for retransmit with the low power (4W?) PRC-119.  
> As I move through the phases of getting a whole system up and running, 
> the next step was to get the PRC-119 set up in the vehicle mount using 
> the RF amp for high power output. Although I've owned the VRC mounts 
> and amp for a while, I've never had the chance to test it out. Well 
> today I did, and voila! Everything worked like a charm.
>
> If you are interested, please see the video I made detailing the 
> testing for power out using the RT-1439, AM-7238/39, an AS-3900 
> antenna standing on a tripod.
> Next steps is to get the PRC-138 connected to the 125W power amp, 
> RF-382A antenna coupler and interface the two.
>
> This is where things will get interesting, running two high power 
> radios with antennas in the same backyard! It will be interesting to 
> see what interference arises and what the practical realities are of 
> such a set up in a small backyard.
>
> Enjoy.
>
> http://www.w2hx.com/x/PRC-119/VRC-90-Power-Test/
>
> (hint, watch the videos in numeric order)
>
>
> 73 Eugene W2HX
>
>
>
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