AS-1729/VRC for CB Band

TJ4man

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Indianapolis, IN
All -

Very new to this, and this forum has been a wealth of knowledge so far.

My original intention was to take an MX-6707 base and AS-1729 antenna set to mate with a CB. This would maintain the correct 'look' of the M934A1, and be functional. I have been reading up on this for a bit (thanks to this forum and others) and found the following information interesting (link below).

I have read of some 'gutting' the MX-6707 and just connect directly with the coax, but this article suggests it's possible to set the lowest band (30-33MHz) to the CB band (27MHz), by verifying the adjustments with an SWR meter.

Anyone tried this?


TJ
 

papakb

Well-known member
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San Jose, Ca
What you've read is correct. The advantage of using an MX-6707 for your antenna beyond it's appearance is it's tunable base. I would definitely recommend against gutting it because good units are getting harder to find and it's a great military antenna to use with lots of radios.

My recommendation would be to get an SWR (or VSWR) meter and then tune the base so that you have the best forward to reflected power ratio with your CB and then leave it there. These antennas ares designed to tune from 30 - 75 Mhz and even though the CB frequency range is down at 27 Mhz there will be places where the you'll get an acceptable match.

Antenna matching is the tuning of the antenna with a radio set so that you get the highest transmitted power out with the least (wasted) power reflected back into the transmitter. Most CB radios are meant to handle bad antenna matches so your not going to hurt the radio with a tiny bit more reflected power and your obviously not looking for DX (long range) communications by the nature of your wanting to use a CB radio since that's not what they were designed for.
 
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TJ4man

New member
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0
1
Location
Indianapolis, IN
Papakb, thanks for the reply... sounds like I am on the right path. I was able to find and purchase a pair of MX-6707 bases, one of which I will use for the CB application. Now on the hunt for an AS-1729 set (and SWR meter) to mate up and tune. I just got the truck, so the project list is long!

Thanks,

TJ
 
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