Batboard

I have been looking on the net to see a chart comparison on the HT1000 to see what options and features that are different from a (A version 1994) radio to a (2004 D version) radio, thanks

tha AN and BN were earlier radios, usually the AN's had the controller board hardwired to the RF board with a jumper flex. AN and BN radios don't do narrowband channels.

The CN and DN radios had the option mate controllers which could accomodate things like rolling code encryption, etc. The CN and DN radios support narrowband. Most of the DN radios had issues fixed (such as the loose antenna connectors, loose shield, etc).

This isn't official but from my observation:

AN first rev HT1000 showed up around late 92/early 1993
BN sec revision started around early 1994
CN Aug 1996
DN early 1997 to present

The 8 channel versions I have seen were early (1993) vintage. I think they were no longer made when the BN and later showed up.

The 8 channel versions I have seen were early (1993) vintage. I think they were no longer made when the BN and later showed up.[/quote]

Yes, that's the case. Funny thing is Motorola then came out with an 8 channel retrofit kit (consisting of an 8 ch. knob & escutcheon) to 'modify'
your 16 ch. radio into 8. Odd bunch !

How can the firmware be updated in a HT1000. I have several that ar 2.?? and some with a 4.?? in them.

Jim

there is no way to upgrade the firmware on an HT1000, the firmware is programmed into a ROM and is not flash upgradeable (after all it is a ROM). Only way to get a newer version is to replace the controller with a newer one (expensive).

Hi All,

OK, I keep hearing that the A model HT1000 "won't do narrowband"

..so I dug in my box and came up with what has to be a fairly old A model - software version 1.03, s/n 402ATW6211.

It programs on both 5 and 6.25 kHz channels (but not 2.5 kHz) and when you select Channel Bandwidth of 12.5 kHz, peak deviation is properly less than 2.5 kHz peak. with the channel bandwidth set to 25/30 kHz, it does just under 5 kHz dev.

So the A model WILL "do narrowband", it just won't hit those new 2.5 kHz channels.

73 DE Hartley

Narrowband refers to the actual channel spacing...IE...12.5 down to 6.25 Khz.
451.7125 to 451.70625(12.5/6.25) esentially HALF of the channel bandwidth, same base frequency, with 'more space' to cram more channels within that space.

Deviation is a product of the audio bandwidth and does not change the RF bandwidth.

The controller is a MASKED ROM, so what is programmed into it, STAYS in it and can not be altered by programming.

'AN/BN' versions do not support certain side button options as the later 'DN' version does, and will not do 6.25 channel spacing either.

Since I don't have a 'DN' version to toy with, I can't review the varied changes between the models other than what I already posted....sorry.

Having a service manual does not replace actual radio ownership i this case.

Hello Ernest,

Hmmm.. well, my VHF "A" version does both 5 and 6.25 kHz channel steps just fine - though it won't do 2.5 kHz.

I dug out a UHF "A" model (an R split) and verified that it, too will do both 5 and 6.25 kHz steps. (and, yes, I programmed them in to make sure it actually did it )

I also decided I have too many old HT1000s in my goodie box..

I agree that the side-panel button options and the 3-positions switch options are indeed much better with the later models - but the basic functionality is there for "narrowband". I don't know where the "A models won't do narrowband" rumor got started, but it just isn't right.

73 DE Hartley