Hmv 5612 - UK Vintage Radio Repair and Restoration Discussion Forum

condense · 2nd May 2020, 2:53 pm

Hello
I rescued a set from my neighbours' house clearance but I can't find a schematic. It looks just like a HMV 1121 on the outside. The 5612 is an export model from the looks of it. I've tried to use the 1121 (trader service sheet 987) but there are some significant differences in the capacitors used from my investigations so far. Sorry for my ignorance (this is only my 3rd set) Any chance anyone has a schematic for the 5612?
Alternatively I would be grateful for any hints on the value of this black capacitor (2nd from left) in this photo? It seems different from all the others - could it be an electrolytic?

ekjdm14 · 2nd May 2020, 2:57 pm

Anything like the 5412 per chance? That's the only similar model number I can find in the VRSD.

condense · 3rd May 2020, 1:49 pm

Thanks for that.
There are some similarities but it's not close enough for me to work out what is what in terms of the schematic.
The radio museum site has the 5612 as a export variation of the 1121 but it is quite different under the chassis.

Any help gratefully received - otherwise I think I will have to guess some capacitor values...

Philips210 · 4th May 2020, 2:00 pm

Hi.

One possible suggestion is to see if there's a comparable Marconiphone export model with the same valve line up.
HMV and Marconiphone were brand names used by EMI before they were sold to British Radio Corporation (BRC) in about 1957.

Regards,
Symon

G6ONEDave · 4th May 2020, 2:57 pm

There was a HMV 5613 and 5614 that used valve types X18, W17 (2 of), ZD17 and N18 (2 of in push-pull). I have service data for both and could scan if not otherwise available.

condense · 4th May 2020, 7:08 pm

Thank you for your help.

The valve lineup is AZ31, DH14?, N151(x2) and Z77 so I don't think it is the same sadly - I am really stumped.

2nd May 2020, 2:53 pm	#1
condense Tetrode Join Date: Jun 2012 Location: Cardiff, Wales, UK. Posts: 79	Hmv 5612 Hello I rescued a set from my neighbours' house clearance but I can't find a schematic. It looks just like a HMV 1121 on the outside. The 5612 is an export model from the looks of it. I've tried to use the 1121 (trader service sheet 987) but there are some significant differences in the capacitors used from my investigations so far. Sorry for my ignorance (this is only my 3rd set) Any chance anyone has a schematic for the 5612? Alternatively I would be grateful for any hints on the value of this black capacitor (2nd from left) in this photo? It seems different from all the others - could it be an electrolytic? Attached Thumbnails

2nd May 2020, 2:57 pm	#2
ekjdm14 Banned Join Date: Feb 2019 Location: Congleton, Cheshire, UK. Posts: 609	Re: Hmv 5612 Anything like the 5412 per chance? That's the only similar model number I can find in the VRSD.

3rd May 2020, 1:49 pm	#3
condense Tetrode Join Date: Jun 2012 Location: Cardiff, Wales, UK. Posts: 79	Re: Hmv 5612 Thanks for that. There are some similarities but it's not close enough for me to work out what is what in terms of the schematic. The radio museum site has the 5612 as a export variation of the 1121 but it is quite different under the chassis. Any help gratefully received - otherwise I think I will have to guess some capacitor values...

4th May 2020, 2:00 pm	#4
Philips210 Nonode Join Date: May 2007 Location: Redruth, Cornwall, UK. Posts: 2,573	Re: Hmv 5612 Hi. One possible suggestion is to see if there's a comparable Marconiphone export model with the same valve line up. HMV and Marconiphone were brand names used by EMI before they were sold to British Radio Corporation (BRC) in about 1957. Regards, Symon

4th May 2020, 2:57 pm	#5
G6ONEDave Octode Join Date: Dec 2019 Location: Owston Ferry, North Lincolnshire, UK. Posts: 1,701	Re: Hmv 5612 There was a HMV 5613 and 5614 that used valve types X18, W17 (2 of), ZD17 and N18 (2 of in push-pull). I have service data for both and could scan if not otherwise available.

4th May 2020, 7:08 pm	#6
condense Tetrode Join Date: Jun 2012 Location: Cardiff, Wales, UK. Posts: 79	Re: Hmv 5612 Thank you for your help. The valve lineup is AZ31, DH14?, N151(x2) and Z77 so I don't think it is the same sadly - I am really stumped.