Great for Amateurs on VHF Low Band or use as a stage play/movie prop
This radio equipment is dated that's for sure (around the 1980's)
This equipment is very well known in amateur radio circles, made by Hitachi Japan for AWA and intended for commercial use - these were commonplace in the
commercial market many years ago.
Tough reliable radio equipment that is often modified to suit amateur radio use.
Amalgamated Wireless
Series RT85 Radio Transceiver
Model 1LM82274 - 450 - 475Mhz design use
Maximum 25W RF output
This is the stock standard original RT85 with the 2716 EPROM and the HD44801A97 uP
Selcall board Z-281 is fitted
Fixed 12.5Khz deviation, I believe this cannot be changed
Currently it is totally unmodified, programmed for 6 commercial channels - no one has made any attempt to modify this unit.
I believe these can be programmed for 64 channels although some references quote 80 channels
Originally these required a dedicated Midlands programmer but I think a 3rd party programmer, the Skyline 70-1000X can program these units as well.
I do not have any programmer here and none is included.
These were designed as shown in the photographs, main unit and then a head unit which did all the controlling (with microphone)
There is NO speaker included, you connect your own speaker (I just used a stock standard 8 Ohm unit for testing) across pins P304-P305 on the head unit - easy to access and solder a couple of wires onto.
From memory these units can be pushed out of band by around 10Mhz possibly up to 20Mhz away from their design frequencies - you would need to do some retuning and most likely the RF output will drop a little as well.
If you search using Google on RT85 you will find lots of discussion about these grand-daddys of mobile radio communication.
COSMETIC CONDITION:
In very good condition, no case damage
No damage to the connectors or the ribbon cable to the head and the head unit itself.
The head unit remains clearly readable and all buttons and the display work fine.
TESTING:
Pretty simple testing undertaken.
Powered it up, made sure I could hear white noise when the squelch was open and that the scan & channel up/down functions all worked as they should.
Powered up the PTT, I have RF output
Great radio equipment for the experimenter or someone who might wish to attempt modification to amateur use although I suspect 70cm is just stretching things a bit, being 20 Mhz down from the design frequency range.
But going up to the UHF CB allocation should not be a problem from an RF viewpoint - all 80 channels should be fine on this gear but the issue with use on the CB channels is going to be the native 12.5Khz deviation.
