Batboard

Hi!

I know this probably is not possible, but I am going to ask anyway because it is so close to the border of the Band Split. Is it possible for a HT-1550 UHF Low Band Split Radio to receive and transmit on 470.8375? I appricate any input you would have. Thank you!

-Bob

I tried it in on an HT1250LS+ 403-470 and the CPS(6.04) gives you an invalid feild error.

YES. It will do it and it works great!!!


Posted: 25 Feb 2005 22:37 Post subject:

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HT1550 XLS 450-527 Ham Mod

Ok, here's the deal.

First off, thanks to Rich KC9FNM my co-worker for figuring this out...I am just posting what he found and I confirmed works.

Recently we bought some HT1550XLS's for the techs to use....all of them 450-527.....grrrrr !

Rich informed me he was able to get his to do ham, and actually have halfway decent performance.

First off you need the "programming battery"

Program in your ham channels into the radio. Program in the alpha tag, and everything else BUT DO NOT CHANGE THE DEFAULT FREQ. Also be sure to check the box for field programming. Again, leave the default freq at 52x.xxx MHZ !!!

Go into the radio configuration screen to the "EDIT" tab. Here's the magic...... follow carefully.

Lower the upper band limit from 527 to like 470 MHZ

THEN you can lower the LOWER limit from 450 to 442 or whatever.

The trick is to lower the window . So you want to go a few mhz down, then lower the upper split down. be sure to lower the UPPER limit first
Once you get a acceptable window, the INVALAD red colored freq will dissapper in the EDIT window.

Now....write the codeplug to the radio.....keeping in mind you have the default freq in you ham channels......this is ok....dont panic

Now that your radio is written, go into the front panel edit mode and enter in your ham freq's and PL's by hand. It will now accept the ham freq's.

I know it sounds odd, but it has worked with two HT1550's so far on the 450-527 split.

I havent went far enough to play with the RSS as far as reading then re-writing and stuff. i dont know if you have to re do the mod. But y'all are welcome to try and let us know.

Your mileage will vary.....film at 11....no warranty..."as is where is" and the usual legal disclaimers apply.

So yea, you can take a 450-527 HT and make it do ham....I got mine on the desk rigt now on ham, working just fine The rx sens is actually not too bad at all. As far as the CDM goes....can't help ya there

Again, credit goes to Rich KC9FNM for discovering this. I am just the author who cant spell too well

The only negative thing I have discovered with the HT1550's is the internal mic audio totally sucks compared to a speaker mic. I just sent mine into the depot (the vol control was flaky) and also noted that the internal mic was too "bassy".

It came back with a new vol control, a firmware update and some part they replaced that wasnt named. Still seems "bassy". Oh well.

73's and good luck, hope this helps someone....

Matt
N3IVK[/b]

Hmm...thats interesting...I will have to try that as soon as I get one lol. Thank you

-Bob

Yes it worked on my ht1550xts