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Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment.

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Old 11th Mar 2012, 7:45 pm   #1
Jeffreyabb
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Join Date: Apr 2009
Location: Durham, UK.
Posts: 165
Default Racal RA1205 Information

Hi
I have been given a Raca RA1205 to Dwg no DA39934A and would like to get it going. I realise it is a single channel Xtal controlled receiver but have no idea about power supplies or other details. It looks like new and has a crystal in skt 1 and two unconnected wires at a small circuit board in the middle of the RHS of the receiver. They look as if they have never been connected.
Does anyone have a handbook, manual or circuit for it?
Any help most appreciated.
Regards
Jeff
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Old 11th Mar 2012, 9:24 pm   #2
Ben-G4BXD
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Join Date: May 2010
Location: Kidderminster
Posts: 16
Default Re: Racal RA1205 Information

models include:

RA1205/A DA39934/A Basic receiver not equipped with mode filters , crystals.
RA1205/A DA39935/A Single channel receiver for AM/CW with 7 Khz bandwidth
RA1205/B DA39935/B As DA39935/A but with 12 khz filter
RA1205/C DA39935/C Equipped for AM/CW with 1.2 Khz filter
RA1205/A DA39936/A Equipped for USB/CW
RA1205/A DA39937/A Equipped for LSB/CW
RA1205/A DA39938/A Equipped for FSK/CW with 1.2 Khz bandwidth ( Standard)
RA1205/B DA39938/B Equipped for FSK/CW with 500 Hz Bandwidth
RA1205/C DA39938/C Equipped for FSK/CW with 1.2 Khz bandwidth and BFO offset crystal
RA1205 DA39941/1-8 Framework assembled with up to 8 x RA1205. Framework MA606/A
RA1205 DA39941/9-12 Framework assembled with up to 4 x RA1205 Framework MA606/B
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Old 11th Mar 2012, 11:40 pm   #3
Jeffreyabb
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Default Re: Racal RA1205 Information

Thanks Ben
I'm pretty sure that it started out as a DA39934/A. There are two xtals in it. In the oven (skt1) is a 1300kcs and in skt2 100kcs. I can't see a filter in there, but that's probably what the 2 unconnected wires are for.
Regards
Jeff
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