LB MT1000 to 6m

[livelongandgrumpy]

I have a 42-50 mt 1000 on 42mhz. I did the file mod and loaded 6 meter freq. into it and it comes up dead, no audio, nothing. Reload original file and it works fine. Any ideas?

[mike m]

First off,

Which mod are you talking about ? I'm not familiar with the file mod you mention.

There are hardware mods required for the VCO along with particular programing that requires a hexeditor.

Also are you using the correct RSS. You must use RSS p220LB.exe and not mt1000.exe or anything else.

You need the P200 low band RSS and nothing else even though you can read and write using regular high band/UHF Mt1000 RSS it will not work properly once you try to turn the radio on.


I need more information on what your using and what you did.

Mike

[livelongandgrumpy]

Followed proceedure on this site, ascii/hex edit the codeplug file and changed freq., saved file, loaded into radio using 3.0.1 MT1000 RSS without viewing file. When radio read back it shows 6m freq's but no beep on pwr on, no squelch etc.

[mike m]

That's the wrong RSS for the low band radio.

That's the exact error that you receive when you use any version of MT1000.exe RSS on any low band radio, it will let you edit and write to the radio but it will not function at all. Fortunately it doesn't brick the controller either. You can recover the radio by using RSS P200LB.exe.

You need to use RSS called P200LB.exe for all low band MT1000 and for all low band P200 radios.

PM me with your direct e-mail address and I'll send you the conversion information in a Microsoft Word document which includes the software hexediting information and VCO hardware mods required to get the radio to work all over 6 meters.


Mike

[n5tbu]

"That's the wrong RSS for the low band radio.

That's the exact error that you receive when you use any version of MT1000.exe RSS on any low band radio, it will let you edit and write to the radio but it will not function at all."


I have not found that to be the case,I use mt1000 software all the time on my MT1000 42-50 radios.
mod

[mike m]

but what about to make them work from 50 to 54 MHz ?


Mike

[n5tbu]

I have 2 out of 6 working on 52.525,the others won't lock there,the vco module needs some adjustable caps to do it right,or you can guess at the values based on the 3 splits info.
BTW the p200 lowband is an MT1000 in disguise!
mod

[mike m]

You don't have to guess on the values for the mods as I already did it and documented everything.

All the required chip caps can be ordered from Digi-Key.

I did this mod several months ago BTW,

I reverse engineered the VCO, measured the original cap values on my Network analyzer and then recalc'd and changed the chip caps to get the radio to go from 50.3 to ~ 53.4 MHz on th
e 3 that I did.

I took a bunch of nice pictures and posted it into a Word conversion document. I also sent it in to batlabs but haven't seen it on their radio specific pages yet.

I also did a mid split, 36 to 42MHz, MT1000 down to 29.0 to 30 MHz for 10Meter FM use.

The document has been going around for several months now so getting the radios above 52.5 is no longer a problem.


Mike

[n5tbu]

Mike,how low will yours go after the mod? Did it keep the 8 meg wide split?
mod

[mike m]

I only needed to program it from 50.3 to ~ 53 .5 so I never tested it below the ham band.

I don't have the radios anymore. I just did the conversions for some hams down in Phoenix as I use an Azden AZ61 HT.

But I still have my 36 to 42 MT1000 that I downbanded to 10FM, it goes from 29 to 33, I haven't tried it any further as there's nothing higher to listen to out here on low band anymore.


M

[willbartlett]

Can somebody email me the modification documents,and any info on the 36-42 to 10m conversion info too?

[Chrise]

Hi all,

I am about to start to convert my 2 radios., any suguestions before i kill them?

Thanks

Chrise

[mike m]

Yes,

N6BKL, N6IME and I just did another conversion this weekend and we have pretty much determined that the following cap values work every time for us.

using the component Locator values in my original document, data taken after several conversions shows that C1 = 7 to 7.5 pf and C2 = 16 pf is perfect to cover the entire band up to 53.99 MHz and down to 50.3 MHz.


For others who are interested, I still don't have the information tabulated yet for the mid split mods down to 29 MHz. I need to get another mid split radio to work on for this mod.


Mike