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Old 2nd May 2019, 2:46 pm   #1
Electronpusher0
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Default RAS radio - any info wanted especially a photo of the back cover.

I had a good day at our local car boot today, came away with a type D Avo, a railway torch (working) and this radio.
I do not recognise the manufacturer and a google search brings up nothing.
I am quite excited to try and get this working as it is in such good condition so I would appreciate if anyone could help with the following:

1 Any info on the manufacturer.
2 Schematic and/or service information
3 A photo of the back so I can make a replacement
4 Any information how to get the marks off the Bakelite (see photo)

I paid 10 by the way.
I will post about the Avo in the appropriate place.

Peter
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Old 2nd May 2019, 6:24 pm   #2
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Default Re: RAS radio - any info wanted especially a photo of the back cover.

Uncanny resemblance to the Strad 511: https://www.radiomuseum.org/r/rmelectric_strad_511.html
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Old 2nd May 2019, 6:39 pm   #3
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Default Re: RAS radio - any info wanted especially a photo of the back cover.

Coffee cream knobs are very Strad.
Loctal valves, side ways tuner, and the corners cut off the chassis rear looks familiar but I can't place it.
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Old 2nd May 2019, 6:53 pm   #4
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Default Re: RAS radio - any info wanted especially a photo of the back cover.

Thanks, I have just downloaded the service sheet for the Strad 511, the chassis layout is identical, the only difference I can see is that the 511 is 3 band whereas mine is MW/LW only.

Peter
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Old 2nd May 2019, 7:44 pm   #5
Boater Sam
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Default Re: RAS radio - any info wanted especially a photo of the back cover.

Why 2 pairs of aerial and earth sockets?
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Old 2nd May 2019, 7:45 pm   #6
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Default Re: RAS radio - any info wanted especially a photo of the back cover.

Hi Peter I've had one or 2 of these over the years, an easy set to work on and operate nicely when done.
There may also be a connection to RM Electric that had a works on the Team Valley at Gateshead during/ post war.

Ed
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Old 2nd May 2019, 9:25 pm   #7
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Default Re: RAS radio - any info wanted especially a photo of the back cover.

Quote:
Originally Posted by Boater Sam View Post
Why 2 pairs of aerial and earth sockets?
I think the set has been modified, it looks like a replacement loudspeaker transformer has been mounted on the speaker baffle (on the 511 it is under the chassis)
The 511 also has an external speaker socket, this sits in the centre of the rear chassis, where an apparent Aerial and earth socket sit on mine.
I wonder if the original loudspeaker socket failed and has been replaced by a aerial / earth socket from someones spares box.

I will investigate.

Peter
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Old 2nd May 2019, 11:01 pm   #8
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Default Re: RAS radio - any info wanted especially a photo of the back cover.

R-A-S Rent a set.
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Old 3rd May 2019, 5:33 am   #9
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Default Re: RAS radio - any info wanted especially a photo of the back cover.

Quote:
Originally Posted by MALC SCOTT View Post
R-A-S Rent a set.
Interesting!

Perhaps a Strad 511 without SW to reduce cost and re-badged?

Peter
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Old 3rd May 2019, 5:37 am   #10
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Default Re: RAS radio - any info wanted especially a photo of the back cover.

Thanks to Malc's hint about Rent-a-set I found this previous thread which confirms the above.

https://www.vintage-radio.net/forum/...ad.php?t=87172

Peter

Last edited by Electronpusher0; 3rd May 2019 at 5:38 am. Reason: Forgot to paste in the link
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Old 3rd May 2019, 5:02 pm   #11
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Default Re: RAS radio - any info wanted especially a photo of the back cover.

Quote:
Originally Posted by Electronpusher0 View Post
Quote:
Originally Posted by Boater Sam View Post
Why 2 pairs of aerial and earth sockets?
I think the set has been modified, it looks like a replacement loudspeaker transformer has been mounted on the speaker baffle (on the 511 it is under the chassis)
The 511 also has an external speaker socket, this sits in the centre of the rear chassis, where an apparent Aerial and earth socket sit on mine.
I wonder if the original loudspeaker socket failed and has been replaced by a aerial / earth socket from someones spares box.

I will investigate.

Peter

I have investigated.
The output transformer on the speaker baffle seems to be original, there is no signs that a transformer was ever mounted under the chassis as in the 511 (see photo)

Also the central A E socket is wired as an extension speaker socket (in parallel with the internal speaker) as per the 511, but the socket is also original, it is riveted in place exacly the same as the other A,E,PU socket.
The "A" terminal is the speaker "live" and the "E" terminal is to chassis (as is the other end of the internal speaker)
Quite what the "A" stands for in this context I do not know.

Peter
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Old 5th May 2019, 7:08 am   #12
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Default Re: RAS radio - any info wanted especially a photo of the back cover.

OK, I think I have nailed it down.
I found this thread:

https://www.vintage-radio.net/forum/...ad.php?t=78547

That thread was about a set looking like a Strad 511 but with a different valve line up and series heater chain with a chassis that looked like a 553W, badged Roland.

The set in that thread is identical to mine.
I have also traced the power supply section of mine and it is the same as the 553W with the exception that the resistor accross the dial lamps measures 172 ohms instead of 40 as per the service sheet for the 553.
The chassis on mine is also identical to the 553W, including valve line up, but with a different dial plate to fit the 511 case and no SW.

It seems that RM made a reduced cost radio using a 511 case with a 553W chassis and loudspeaker/ output transformer but with a 511 dial plate and no SW.

These were then badged for other suppliers. We know at least two of the others, Rent-a-set and Roland.

On with the restoration......

Peter
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Old 5th May 2019, 7:55 am   #13
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Default Re: RAS radio - any info wanted especially a photo of the back cover.

Hi Peter, dial lamp bypass resistors were often altered, sometimes as an official mod, sometimes by service people due to the problem with switching on and off with the valves "hot" and blowing bulbs.
See some of the threads on Bush DAC series

Ed
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Old 7th May 2019, 4:52 pm   #14
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Default Re: RAS radio - any info wanted especially a photo of the back cover.

Here are a couple pics of the back cover.
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Old 7th May 2019, 6:53 pm   #15
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Default Re: RAS radio - any info wanted especially a photo of the back cover.

Thank you very much! I can now make a replacement.
However I still have to finish the refurbishment, it is basically working but "deaf". I checked all the valves on my Mullard HSVT and 3 of them definately need replacing.
The BacoBrite arrived today so I can polish the case. (the case of yours Malc looks great by the way)

Peter
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