Burndept
Conversion of Emergency Service Radios

BE536  256 channel 12.5KHz spacing AM only.

BE544  256 channel 12.5KHz spacing AM / FM.

BE540  10 channel 25 KHz spacing UHF FM repeater set.

BE540  repeater VHF-UHF control box.

BE536  VHF control box.


Burndept
BE536 256  channel AM only 143 Ė 156 MHz and 71 MHz.  Some 2000 sets bought
BE540/A4  VHF-UHF repeater mobiles.  Some 3250  bought Circa 1985
BE544  256 channel AM / FM  143 Ė 156 MHz and 71 MHz.
Probably the nicest sets to mod for 2metres.
BE536  AM only.  But easily modified to FM by adding 10 components to the existing unused FM discriminator chip and noise limiter IC.  Makes the receiver AM / FM switchable or FM only.  Transmitter easily can be converted to FM by feeding attenuated AM audio into the synthesized oscillator and hence wobbling it up and down.  As per the standard conversion of a Burndept-DYMAR M2080 synthesized set 256 channel capability with easy to push up and down flip switches.


BE544  AM / FM version  256 channel   ***GOLD STAR RECOMMENDED.***
Identical set to the BE536MU but dual mode AM / FM.  No conversion required.  Change the two EPROMís and straight on  2 metres.  Both sets can be used with the BE540 VHF-UHF talk-through control box, to give a crossband 2 metre / 70 cms repeater facility.  If used with a Pye w15ut talk-through Westminster UHF or a BE540  20 watt 10 channel crystal controlled Westminster replacement set.
Ideal for RAYNET purposes......
If you have no EPROMís available to put the set on a 2 metre frequency, you can fit in the EPROM sockets two 8 way bit switches and switch the address lines up and down to get the synthesizer on to 2 metres, to test the set and control box out OK.  A toggle switch can be fitted to switch AM / FM per channel or why not have 128 channels AM and 128 channels FM in pre programmed EPROMís.



THE PYE MUSEUM IS CLOSED
DAVE HICKS G8EPR, MUSEUM CURATOR, HAD A SERIOUS ACCIDENT AT WORK IN EARLY 2016.
SADLY HE DIED AT THE END OF APRIL 2017.
THE WEBSITE WILL HOPEFULLY CONTINUE AND REMAIN OPEN BUT THERE IS NO ONE TO ANSWER ANY EMAILS

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11 May 2017 17:42:59

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Any addition notes, comments or photographs of any of these sets are very welcome and can be sent to:
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The site deals mainly with Pye (and other companies) Radio Telephone and Telecommunication equipment.  It is very unlikely that we will be able to answer any questions about Pye domestic radios, radiograms, record players etc etc