Jump to content

Recommended Posts

Posted

Why are gmrs swr meters so expensive? The one I have for my cb cost twenty bucks and I only needed to use it twice. Is it worth it to even get one, since I believe most antennas come pre-tuned? If so, are there places that have used ones, other than the obvious ebay and craiglist platforms? I'm considering it because I'm going to be adding a base station.

Posted

They are more expensive because UHF is more challenging from technical standpoint than 27MHz.

There is a thread here where we were discussing getting SWR meter vs NanoVNA. NanoVNA is much more advanced, and costs less than a good SWR meter, but it much less newbie-friendly. SWR meter worth getting (together with quality UHF-capable dummy load!) if you are doing home or car installs. For HTs, you cannot really use SWR meter to obtain meaningful data.

 

 

Posted

Lots of people like the Surecom SW-33 SWR Mk2 meter avail on Amazon.  It's about $40.

It certainly can be used with an HT (Walkie Talkie) as long as you have the correct cables.  I use my MFJ meter with HT's all the time and it works fine.  Just make sure the power range is appropriate for whatever radio you intend to use in your test.  You do not have to test the antenna with the same radio you want to use it with either.

Testing a portable antenna (like a rubber duck) is a little tricky because the ground is not well defined and the meter itself can impact that. But usually portable ants aren't tunable anyway so why bother.  With HT's and portable (radio mounted) antennas your body is actually part of the ground system.

The main reason CB meters are so cheap is that they make so many of them.  They're a commodity.  Some day GMRS meters may also be that cheap but I suspect most GMRS users do not test their antennas and just use it out of the box. 

 

Vince

 

 

 

Posted

I’d also point out the CB SWR meters are built for a single, very narrow frequency range and 5 watts of rf power.

SWR Meters that work on GMRS usually cover a much wider band. My Diamond SX400 covers 140 to 525 MHz and up to 200 watts. There’s more sophisticated components necessary to do that. 

Posted
2 hours ago, OldRadioGuy said:

With HT's and portable (radio mounted) antennas your body is actually part of the ground system

That's exactly why SWR meter is not providing any useful info about HT antennas. Measuring SWR of HT antenna is a totally meaningless exercise.

Posted
13 hours ago, axorlov said:

There is a thread here where we were discussing getting SWR meter vs NanoVNA.

That was an awesome thread, thanks for sharing it with me, I learn a lot and then some. ?

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use and Guidelines.