Need help Saber III

patrol186 · Post by **patrol186** » Wed Nov 21, 2001 6:33 pm

Hi all!
I have a saber three, 136-150 split, I programmed it as a H33 series and programmed the freqs the highest being 156.800 , the radio transmitts fine but I am not getting any receive, the pl's are correct the freqs are correct, I did the same with my saber I 157-174 mhz and had mo problem.
am I too far out of band split? any ideas or help would be great,
thanks and have a safe and happy thanksgiving
Ben

clavo · Post by **clavo** » Wed Nov 21, 2001 8:01 pm

Sounds like a similar problem that im having. Read the "Stumped" thread. I fixed most of the problems by just using the correct bandsplit H43 and not the 33 then hex editing all the freq info into the codeplug. Let me know if you find out more.

Elroy Jetson · Post by **Elroy Jetson** » Wed Nov 21, 2001 8:35 pm

That's been addressed before. The 136-150.8 low split radios will NOT work with the H33 trick because the VCO is entirely different and has practically NO excess range.

The H33 trick can only work with radios that are originally in any OTHER bandsplit.

Elroy

patrol186 · Post by **patrol186** » Wed Nov 21, 2001 8:43 pm

Thank's for the information!
I missed those posts
Thanks again!
Ben

clavo · Post by **clavo** » Thu Nov 22, 2001 1:43 pm

Now, how to get the radio to work up in the high 150s and 160s. It's possible, because my radio did it on a few freqs when I programmed it as a H33. And idea how to fool the radio into thinking it can go higher?

patrol186 · Post by **patrol186** » Thu Nov 22, 2001 4:02 pm

I have been doing some "reworking" on the radio, I got it do do some more freqs but when I hooked the radio to the service monitor I learned that while the radio may take the freqs the radio starts to go off freq, it seems the VCO cant hold frequency too much above what the radio is rated for.
I am now pondering tring to upgrade my saber I with some of the saber III parts.
Ben

N4UMJ · Post by **N4UMJ** » Thu Nov 22, 2001 5:21 pm

From my experience with pushing the limits on some of the VCO Synthesizers, they can become quite erratic and unstable when they reach the boundry point of operation. Maybe a good idea to keep it within the range intended by Motorola. More than a 1 MHz +/- may be possible but your mileage may vary.

I had a VHF Mid(146-162)and wanted to take it below 145MHz and the VCO simply would not allow it(beeped when TX attempted below 146MHz). Swapping the improper freq. range NLD8210B with the proper NLD8201B synthesizer fixed it and now it's happy. Of course now I have lost that extra range on the top side which I did not need anyway(Ham usage).

An improper range FDS module may be causing the receive desense as there are two ranges (136-150.8 and 146-174). The P/N's are NFD6131A and NFD6132A respectively.

Get the right VCO Synthesizer and the right FDS module in and maybe things will improve.

Good Luck!

Eddie
N4UMJ

patrol186 · Post by **patrol186** » Thu Nov 22, 2001 8:09 pm

I just completed the saber I upgrade,(upgrading to a saber III) I used the front display board from the 136-150.8 saber III and installed it on the 157-174 saber I programmed it as a saber III low power ( for the 148-174 split)saber III code plug and it works great, I then converted the 136-150.8 into a saber I,
thanks again to everyone!

clavo · Post by **clavo** » Thu Nov 29, 2001 1:27 am

Old modules, Either of you still have your old high split VHF modules? I need to get my saber to do 146-172 split. Looks like you guys switched out these for the 130-150 split. Got the old parts laying around???

patrol186 · Post by **patrol186** » Thu Nov 29, 2001 4:47 am

I used the front assembly from my saber 3 136-150.8 and installed it on a saber 1 157-174 mhz,
I then programmed my "new built saber III as a low power H33QXK7139CN model,
the only parts I have left is now a saber 1 136-150.8
you might look on e-bay as there are a few saber parts auctions that looked interesting