800 MAXTRAC to 902 rx question

BDB · Post by **BDB** » Wed Jan 25, 2006 4:36 pm

I have a trunking maxtrac here that will do talkaround / conventional . If I do the hardware modifications listed here and elsewhere will I be able to skip the firmware change as it will already do conventional ?

Thanks !

Max-trac · Post by **Max-trac** » Wed Jan 25, 2006 6:02 pm

Will your trunking RSS allow you to enter 902 freqs?

BDB · Post by **BDB** » Wed Jan 25, 2006 6:17 pm

It will not take it directly. Is it possible to hex the bandsplit up ?

Max-trac · Post by **Max-trac** » Wed Jan 25, 2006 6:45 pm

If you have labmax conventional rss, try to use it to program the conventional channels....

It is not hard to just make it conventional with a firmware change, then you can put a 2ch front on it and save your multi ch front for another radio...

BDB · Post by **BDB** » Wed Jan 25, 2006 6:53 pm

It's a smartnet C6 model to begin with. I don't mind experimenting. I'm trying to hex the file at this time. I'll keep you posted.

BDB · Post by **BDB** » Mon Jan 30, 2006 12:52 pm

It does indeed work without a firmware change. If someone does have a T/A VCO in an 800 maxtrac there is no need to change it to a conventional radio. Performance wise I'm getting solid rx on 902.4125 at .20uv with both filters bypassed.

kcbooboo · Post by **kcbooboo** » Mon Jan 30, 2006 2:39 pm

So, what did you have to do to get that frequency into the radio? Just hex-edit the band limit to allow out-of-band operation, or was there more to it?

Did you use trunking or conventional software on it?

Now if you change the filters, you'll reduce the susceptibility to image signals and other junk. I have a few left. Contact me privately if you're interested.

Bob M.

BDB · Post by **BDB** » Mon Jan 30, 2006 6:44 pm

Yes a hex edit of the trunking .MDF did it. I Replaced the two instances of FC21 with IC25. The radio also receives well in the commercial band. Now I need a good transmitter for 927 and I'll be set. Check your PM's in reference to the filters.