Jump to content
  • 0

Allowable SWR for Midland MXT400


RickW
 Share

Question

Our family recently purchased a couple of Midland MXT400's. I am trying them out using my GP-9 dual band antenna, but of course the SWR is very high (2.5:1) since it is far from the design frequency. The heat sinks don't get very warm with say a minute or so key down at high power setting, but I wonder if anyone has run this type of rig and damaged the finals at these SWR levels.

 

Although I recently joined the group, I have been reading the mail for the past year or so and I know that there are some very accomplished technical experts here with a lot of practical experience.

 

Thanks for any help or suggestions.

 

Rick W

Link to comment
Share on other sites

3 answers to this question

Recommended Posts

  • 0

The price of a Mid XMT400 ($200) vrs the price of a proper antenna ($35) I would not deal with it. Browning/ Tram 1170 (magnetic mount) or BR450 (nmo ) mount either one will come ain at 1.2 or less (swr) after trimming to the supplied chart.

 

Why not just get the right antenna to star with.

 

The aradio is just a power supply for an antenna.

Link to comment
Share on other sites

  • 0

After blowing finals on a yaesu 7900 due to an improper ground on a magnetic antenna that sent SWR through the roof, I became very strict about what my SWR was. I test and retest until I get down to about 1.5 or less. Currently all my radios, ham and GMRS, run about 1.05-1.2:1. I am ok with 1.5 but I always feel it can be tweaked that little bit to get better results.

2.5:1 is not very good and is close to infinite [3.0:1 and above] which WILL damage your radio very quickly.

Link to comment
Share on other sites

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
Answer this question...

×   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.

 Share

×
×
  • Create New...

Important Information

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