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Old 29th Sep 2015, 2:15 pm   #1
Janey123
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Default Marconi R1155 Receiver. Power supply construction.

Hello all. This is a long shot and I hope someone can help.

We recently spent a very emotional day at RAF Coningsby in Lincolnshire where we met a veteran RAF WOp/AG who, in December 1944, baled out of his burning Lancaster, survived but became a prisoner of war. This man is now 92 years old but remembers and talks of his adventures as if it were yesterday. He has also written an excellent book about it all. A while ago, some remains of his Lancaster, 'B' Baker, were found and among this was a small part of his Marconi R1155 radio. This piece was eventually returned to him, mounted on a plaque, and is now one of his most treasured possessions.

Anyhow, we were so taken by this old gentleman, who has now become a very valued friend, to the point where we thought how nice it would be if we could buy a working Lancaster radio to take to him as a thank you for the time he gave to us.

Knowing absolutely nothing about these radios apart from what they looked like, we bought one off eBay which the seller said was fully working and had been converted to a 240V supply. We soon learned that it wasn't just as simple as plugging it into a domestic power socket and away you go!

I've done a little research and know that it needs an external power supply but clearly it is a specialist thing and is totally beyond my understanding and/or capabilities, hence my rambling post on here.

Could anyone help please? If anyone knows of someone who would be prepared to make a power supply for us, at a cost obviously, or could provide any help at all I would be so grateful.

Thanks for taking the time to read this.
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Old 29th Sep 2015, 2:55 pm   #2
TonyDuell
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Default Re: Marconi R1155 Receiver. Power supply construction.

The first thing you need to do (I think) is to determine if it has been converted to 240V mains and if so how. Or is it totally original. Or what. Obviously originally these sets were not used on 240V mains (it doesn't exist in a Lancaster), but after the war many were modified in various ways by radio amateurs who had bought them as surplus equipment and wanted to use them.

This is not my area at all (I have seen an R1155 but know nothing about them) but I would post photos of the chassis/insides of your set to the appropriate forum here (vintage military/amateur) and somebody will know how much (if anything) is not original

Alternatively get the technical manual for the set and compare your set with the layouts there. It should be possible to see if anything is totally different.
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Old 29th Sep 2015, 3:08 pm   #3
paulsherwin
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Default Re: Marconi R1155 Receiver. Power supply construction.

Jane, are you looking for someone to visit you and advise on the condition of your radio and its prognosis?
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Old 29th Sep 2015, 4:07 pm   #4
Janey123
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Default Re: Marconi R1155 Receiver. Power supply construction.

Thanks for your reply Tony. I will take some photos and post them on here.

Thank for your reply Paul, if it's possible for someone to do that, we might be interested. What would we need to do to arrange this, how much would it cost etc.

Thank you both
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Old 29th Sep 2015, 4:11 pm   #5
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Default Re: Marconi R1155 Receiver. Power supply construction.

Just a point I wonder if the one you have Has been modified for 240Volts AC and all it "might" need if working is an aerial and possibly a speaker if not fitted in side the case by said person who modified it.
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Old 29th Sep 2015, 4:36 pm   #6
Ed_Dinning
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Default Re: Marconi R1155 Receiver. Power supply construction.

Hi Jane, Radio Bygones magazine often has articles in it about these sets. A google will give you some details. The latest edition has pictures of wireless set ups in various bombers.
There is a member of this forum, who lives in the Alston area whose relative designed the ground simulator for wireless operators in Lancasters, called the "? box".

I've built several power supplies for these sets and their associated transmitter the 1154; I'm presently doing one for another forum member.

These sets were sold in huge numbers, and cheaply following the war and there were many articles in the radio magazines about converting them for "ham" use. This usually involved fitting a 240v power supply and possibly a loudspeaker.
The original supply came from the aircraft 28v DC system and through a small motor generator to supply the transmitter and receiver.

If you want to speak to me send me and e-mail through the PM (personal message) system one this forum.

Ed
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Old 29th Sep 2015, 4:52 pm   #7
M0FYA Andy
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Default Re: Marconi R1155 Receiver. Power supply construction.

Buying an R1155 without knowing much about them is a real gamble - so many were messed about with when they were readily available from the surplus shops.
I know someone in Grantham who could advise you on its condition, not too far from Retford if you could take it to him. Do you want me to contact him and ask if he'd have a look at it?
Andy
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Old 1st Oct 2015, 1:02 am   #8
Janey123
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Default Re: Marconi R1155 Receiver. Power supply construction.

Thanks for your replies

Andy, I would be very grateful if you could contact your friend with a view to us taking the radio to him. One weekend maybe?

Hamish, it doesn't have any power cables and there is no speaker fitted.

Thanks.
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Old 23rd Oct 2015, 10:41 pm   #9
Janey123
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Default Re: Marconi R1155 Receiver. Power supply construction.

Andy, just wondering if you managed to contact your friend to see if he would be prepared to look at the radio for me?

Thanks
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Old 24th Oct 2015, 3:06 pm   #10
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Default Re: Marconi R1155 Receiver. Power supply construction.

Janey, if you could post a photo of the front panel and case exterior this would show some of the modifications. I would suggest also contacting the seller and asking how long ago it was working, and if possible what changes were made - are you able to do this? Ebay has policies protecting buyers, and it should be as described. Plus, i usually find sellers are helpful. Photos on here will only post if low resolution, so you need to set your camera to maybe 3 megapix.
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Old 24th Oct 2015, 7:30 pm   #11
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Default Re: Marconi R1155 Receiver. Power supply construction.

I think it is a good thing there is no speaker fitted as at least it limits what has been modified.

My R1155 has a homebrew power supply/audio output and speaker.Though I have not seen it for weeks as it is in storage at Pickfords plus other stuff should we find a buyer for the house up here.

Shame I am not still in Misterton where I lived for 30 years as I am sure I could have helped.
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Old 24th Oct 2015, 9:00 pm   #12
M0FYA Andy
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Default Re: Marconi R1155 Receiver. Power supply construction.

For some reason I didn't spot your posting of the 1st asking me to contact my pal in Grantham. I'm just catching up on the forum after being out all day at a VMARS auction where, ironically, so was he!
I'll give him a call tomorrow.

Andy
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Old 25th Oct 2015, 12:42 pm   #13
M0FYA Andy
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Default Re: Marconi R1155 Receiver. Power supply construction.

Janey, you have a PM

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