Help to ID this chassis and valves - UK Vintage Radio Repair and Restoration Discussion Forum

Otari5050 · 14th May 2017, 8:20 am

Hi folks,

Picked up a Gulbransen desk-top radio-gram but it's missing the ID info off the back.
Also missing two tubes, which so far I believe are a type 80 rectifier and possibly a 2A5 output.
I'd like to ID the chassis so I can find a diagram for it and work out what the tube complement is, as only one has a number on it (the others have worn off) and that's the one in the centre at the rear which is a type 85.

Yarraman · 14th May 2017, 9:47 am

If one of the tubes is an 85 then the radio must run on 6.3 volt tubes, so i would expect the output to be a 42 with an 80 rectifier. The others could be 6A7 convertor and possibly a 78 or 6D6 IF amp. Most of the schematics for these are all very similar.

short wave · 14th May 2017, 11:30 am

Any chance of a front photo as well? thanks

Otari5050 · 15th May 2017, 10:16 am

Here it is in all its resplendent glory

14th May 2017, 8:20 am	#1
Otari5050 Pentode Join Date: Jun 2015 Location: Auckland, New Zealand Posts: 100	Help to ID this chassis and valves Hi folks, Picked up a Gulbransen desk-top radio-gram but it's missing the ID info off the back. Also missing two tubes, which so far I believe are a type 80 rectifier and possibly a 2A5 output. I'd like to ID the chassis so I can find a diagram for it and work out what the tube complement is, as only one has a number on it (the others have worn off) and that's the one in the centre at the rear which is a type 85. Attached Thumbnails

14th May 2017, 9:47 am	#2
Yarraman Tetrode Join Date: May 2007 Location: Auckland, New Zealand Posts: 78	Re: Help to ID this chassis and valves If one of the tubes is an 85 then the radio must run on 6.3 volt tubes, so i would expect the output to be a 42 with an 80 rectifier. The others could be 6A7 convertor and possibly a 78 or 6D6 IF amp. Most of the schematics for these are all very similar.

14th May 2017, 11:30 am	#3
short wave Pentode Join Date: Mar 2013 Location: Leeds, West Yorkshire, UK. Posts: 239	Re: Help to ID this chassis and valves Any chance of a front photo as well? thanks

15th May 2017, 10:16 am	#4
Otari5050 Pentode Join Date: Jun 2015 Location: Auckland, New Zealand Posts: 100	Re: Help to ID this chassis and valves Here it is in all its resplendent glory Attached Thumbnails