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 A Philips model 131 battery radio fixed
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 Return to top of page · Post #: 1 · Written at 3:01:51 PM on 11 June 2016.
Fred Lever's Gravatar
 Location: Toongabbie, NSW
 Member since 19 November 2015
 Member #: 1828
 Postcount: 571

Well i'm at it again. You radio guys and gals must think all I do all day is sit in the workshop and fix up old useless radios!

It's not so, its just that I am hyperactive!

Any way, I bought this thing last year and have written up a story about how I made it work again.
Somebody may be able to tell me what model it is and point me to a circuit diagram.

Read and laugh at how I get into technical trouble through ignorance once more.

Cheers, Fred.

Philips Model 131 Radio


 
 Return to top of page · Post #: 2 · Written at 8:32:24 PM on 11 June 2016.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 5502

I believe it's a model 123, though that may only apply to the all-electric version. If the model number does turn out to be different I will update the details.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 3 · Written at 9:05:47 PM on 11 June 2016.
Robbbert's avatar
 Location: Sydney, NSW
 Member since 18 September 2015
 Member #: 1801
 Postcount: 1074

A battery set, that would have been a horrible surprise.

The thing looks like a standard Mullard in every way, except it is Philips. (not rebadged)

For the filaments you could have used one or two D batteries in parallel, this would have been simpler and no hum.

I notice it has a shortwave band. Does it work?


 
 Return to top of page · Post #: 4 · Written at 9:07:53 PM on 11 June 2016.
MonochromeTV's avatar
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 1043

I believe it could be a model 131.

Kevin Chant does have the service manual for it:

http://www.kevinchant.com/uploads/7/1/0/8/7108231/131.pdf

The Mullard version is the model MBS1112:

http://www.kevinchant.com/uploads/7/1/0/8/7108231/mbs1112.pdf


 
 Return to top of page · Post #: 5 · Written at 9:26:35 PM on 11 June 2016.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 5502

It is, indeed. Links updated.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 6 · Written at 10:04:19 AM on 13 June 2016.
Fred Lever's Gravatar
 Location: Toongabbie, NSW
 Member since 19 November 2015
 Member #: 1828
 Postcount: 571

Hi folks, thanks Brad, Robbbert, Monochrome for the above work on identifications.
You are all dead right that's what it is a 131. I downloaded the circuit and also read a bit more about Philips radios.

Robbbert I fired it up again and noted the shortwave does not work at all but I wont try and find out why.
The selector switch has degrading wafers that are buckled so I don't want to move it again.
Probably there are contacts not making somewhere. I noted on another Philips set the same thing with the wafer switches.
The material used and the thickness of the wafers is substandard, with entropy taking over and the material just disintergrating.

I found that a single "D" NiCad which has a natural range of 1.0 to 1.6 volt worked like a charm for the filament supply.
A 1.5 volt float circuit on that cell would probably be a solution for a "battery eliminator".
One other thing I may try is grabbing one of those "supercapacitors" next time i'm in Jaycar. A couple of Farads may do the trick nicely.

Thanks again all for the ID work.

FredL.


 
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