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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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22nd Jan 2019, 11:06 pm | #1 |
Triode
Join Date: Dec 2015
Location: Ormskirk, Lancashire, UK.
Posts: 13
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Racal RA1772.
help and advice needed ,I,ve had a problem with my rx losing digits on display,after playing for a while it sorts itself out,now I find it wont tune in fast mode,slow will and in reverse it tunes at (almost )normal speed,my shack is outside in a wooden insulated building,which has a low wattage heater left on and a dehumidifier,could it be because it,s too cold?this rx was probably switched on 24/7 in it,s working life,any comments would be appreciated,Regards Merv G6NJJ
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23rd Jan 2019, 12:23 am | #2 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,894
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Re: racal ra 1772
Are the OBIC displays fitted into sockets? Contacts can be iffy.
THe bias on opto-isolator type RPG detectors can need adjustment to get them going reliably. David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done |
23rd Jan 2019, 11:25 am | #3 |
Pentode
Join Date: Sep 2014
Location: Bedford, Bedfordshire, UK.
Posts: 174
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Re: Racal RA1772.
Merv,
My 1772 would start up intermittently. I can't remember the precise details but I did a search on this forum and others and read that the griplets joining top and bottom of the psu PCB, after time, could fail to conduct. A good dose of solder applied with my Weller seems to have done the trick. It's a fairly simple thing to try - the psu does get quite hot I recall, and you never know, it may be the cause of your problems indirectly. The thread here discusses: https://www.vintage-radio.net/forum/...ad.php?t=69206 Ian |
23rd Jan 2019, 11:47 am | #4 |
Dekatron
Join Date: Nov 2010
Location: Oxford, UK.
Posts: 4,991
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Re: Racal RA1772.
There is a Yahoo group called RacalRA17forum. Although says RA17 it covers things like the RA1772 too. The RA guru Rob Filby is on the group.
Craig |
14th Mar 2019, 10:54 pm | #5 |
Triode
Join Date: Dec 2015
Location: Ormskirk, Lancashire, UK.
Posts: 13
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Re: Racal RA1772.
many thanks for all replies,Regards Merv G6NJJ
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