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Choosing a radio – GMRS or VHF

July 23, 2007 By paul.adler 11 Comments

Reading the instruction manual for my Vertex VX150 VHF radio. I was learning how to store the VHF frequencies of the other teams into the memory of the radio. Photo Paul Adler.

I carried two different types of radios on Everest this year – a new digital GMRS radio and a VHF radio.  Here is how they compared.

The models that I used were a Vertex VX150 VHF radio and a Midland GTX600 GMRS radio.

Price
There is a reasonable difference in price of these items – the Midland radio is less than $60 for a pair from Amazon, whereas the Vertex radio is about $250 for a pair on ebay and much more than that if you buy through a retail shop.  And then you’ll need to buy any accessories such as a microphone and antenna for the VHF unit.

So how did they perform?
In close range, there wasn’t much difference between the GMRS and the VHF unit.  On Everest South this means between BC and C1.  However once you got past C1, there was a noticeable difference, with the VHF radio performing significantly better than the GMRS.  The VHF range is definitely further than the GMRS and I think the microphone is better, enabling you to still understand the other person, even when the signal is weak.  At the South Col, the GMRS didn’t work at all, but the VHF worked as long as we held it in a particular spot inside the tent.  Above the South Col, neither radio could communicate with base camp until we reached the South Summit.  One of our sherpas had a radio with a long antenna and this seemed to work.

We only had the standard 21cm antenna on our Yaesu radio, but I would highly recommend buying a longer one.  Make sure you get one that is designed for 144Mhz.  If I was doing this, I would buy a long one (at least 1m) and then mount in onto the side of my packpack, being held in by the compression straps.  I had an external speaker and microphone connected to our radio and clipped to my backpack shoulder strap, and this allowed me to easily use the radio whilst climbing, without needing to take it off my packpack.

Other factors to consider

Almost every other team on Everest was using VHF 144Mhz frequency radios, so it’s handy to have your own radio to be able to communicate with other teams, especially in an emergency.  Also the HRA (medical) only has 144Mhz.
The performance of both radios improved when lithium batteries were used, as compared with Duracell Alkaline.  Lithium batteries are a lot lighter than alkaline and you really notice this in a VHF handset which takes 6-8 batteries.

Logistics for climbing Mount Everest from Nepal - My experiences with Asian Trekking and IMG
What Next and Down Suit review

Filed Under: Everest 2007

Reader Interactions

Comments

  1. sarah says

    July 23, 2007 at 10:20 pm

    Jill, Dallas, TX
    Really enjoy your assessments of the equipment you used. However, I am most eager to hear your comparison of Asian Trekking to the company you used last year and what REALLY happened last year.

    Reply
  2. Paul Adler says

    July 23, 2007 at 10:39 pm

    Hi Jill, The Asian Trekking and IMG comparison is coming! Regards, Paul.

    Reply
  3. Umlauts says

    July 23, 2007 at 11:50 pm

    Dear Paul,

    I have no intention of ever scaling Everest, or any other exorbitantly large mountain for that matter, but yet I find your critiques on down suits, radios and other miscellaneous climbing equipment most interesting. Go figure!

    I hope you and Fiona are well, and settling back into Melbourne-town. Keep up the good work.

    Zoe

    Reply
  4. CraigBoyle says

    July 24, 2007 at 7:33 am

    Hi Paul,
    Thank for this. I agree with your assessment completely. The advice on a longer antenna is very interesting. Did you bury the radio in the pack to combat the effects of the cold on the radios batteries? I was just about busting waiting for the next reveiw. Thanks again, can’t wait for the next one.
    Craig

    Reply
  5. CraigBoyle says

    August 6, 2007 at 7:45 am

    Hi Paul,
    Just wondering when the next review is coming?
    Craig.

    Reply
  6. Paul Adler says

    August 6, 2007 at 10:23 pm

    Hi Craig, I am working on a review of Asian Trekking and comparing them to IMG. Cheers, Paul.

    Reply
  7. Paul Adler says

    August 6, 2007 at 10:25 pm

    If you use Lithium batteries, it seems to be fine with the cold. I had mine on the outside of my pack all the time.

    Reply
  8. moneal says

    September 29, 2007 at 5:08 pm

    Hey Paul:
    How come you’re keeping us waiting? 😉
    I’m very interested in the next installment.

    Mark

    Reply
  9. sarah says

    October 3, 2007 at 2:28 pm

    Jill, Dallas, TX

    Can hardly wait for this installment, Paul. Hope life is going great for you and Fiona.

    Reply
  10. Paul Adler says

    October 3, 2007 at 6:49 pm

    Hi Jill,
    I am just putting it up on the site now and it should be visible in a few days. Cheers, Paul.

    Reply
  11. sarah says

    October 3, 2007 at 9:16 pm

    Jill, Dallas, TX
    Will be checking daily!

    Reply

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Paul’s Everest Climb 2007

In 2007, Paul returned to climb Mt Everest after missing out on reaching the summit by 100 metres the previous year. In 2006, Paul and Fiona both climbed together and although Fiona successfully summited, problems with Paul's oxygen system forced him to turn around. On 23 May 2007, exactly a year to the day later, he reached the summit. This is the daily blog from this climb.
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