'Standard' SR-V307 - UK Vintage Radio Repair and Restoration Discussion Forum

TonyDuell · 13th Dec 2018, 7:22 pm

I know I've said that vintage TV is not my thing, but I couldn't resist buying a
'Standard' (or is it 'Standard Radio') SR-V307. This is a tiny transistorised monochrome TV. It uses a directly-heated 3" (screen diagonal) CRT with the video modulation applied to the centre-tap of the secondary of the CRT heater transformer.

It runs off 9 C cells in a holder that forms the back bottom part of the case. Mine came with a set of leaking cells in there but fortunately the holder is
undamged. No corrosion on the contacts at all.

I've not powered it up yet but it doesn't look too hard to repair.

There's not much about it on the web, but it's in the 1972 volume of R&TVS which is on my bookshelf. So I have the circuit diagram, etc.

Does anyone else have one of these sets or any other information about it.

As to what I paid fpr it, I am not sure. £20 got me that set _and_ a Bush DAC90A radio (missing the mains lead/connector but otherwise looks complete and unmangled inside).

mark pirate · 13th Dec 2018, 10:56 pm

The Standard is a cute little set and gives a crisp picture when working well.
Sounds like you got the DAC90 for a good price, the Standard was a nice little bonus!

Mark

Restoration73 · 13th Dec 2018, 11:10 pm

I had the NTSC version badged as "Minny TV" which had a 14-position turret tuner
(channels 2-14 & U) to the right of the uhf knob which was the IF amplifier for the basic uhf tuner.
Standard Radio later got into the amateur radio market and was absorbed by Yaesu
(Standard Vertex) around 1999. They even had a factory in Shannon ROI in the mid 60's.

TonyDuell · 14th Dec 2018, 5:50 am

Restoration73 : Mine is the UHF-only model but I had noticed a little PCB with a 1 transistor IF amplifier on it ('Board 2' in the service information I have) that feeds the input of the main IF amplifier ('Board 4'). I wondered if that was to replace a VHF tuner that had acted as an IF amplifier on UHF.

Mark : To be honest I was more attracted to the SR-V307 than to the DAC90A (!). Yes I know the latter is an 'iconic' design but to me it's just a 4 valve + rectifier superhet radio. The TV looks to be more interesting electronically and it _is_ cute

Maarten · 14th Dec 2018, 12:21 pm

The consumer electronics branch of Standard radio went on to become Marantz a long time ago. They may have kept the Standard name on communications equipment until that branch was sold to Yaesu.

TonyDuell · 14th Dec 2018, 2:25 pm

Getting back to this little TV. I've cleaned up the case and looked about inside. I couldn't see any obvious signs of problems so I gave it 12V from my bench supply. I got some glow on the screen, so I connected my old Manor Supplies pattern generator to the aerial input. After fiddling with the hold controls I got a reasonable picture. Even better after a shot of propan-2-ol to the vertical hold control kept the vertical oscilaltor on-frequency.

I've put it back together for the moment. I suspect the other controls could do with cleaning too, but at least there are no major problems with it.

13th Dec 2018, 7:22 pm	#1
TonyDuell Dekatron Join Date: Jun 2015 Location: Biggin Hill, London, UK. Posts: 5,208	'Standard' SR-V307 I know I've said that vintage TV is not my thing, but I couldn't resist buying a 'Standard' (or is it 'Standard Radio') SR-V307. This is a tiny transistorised monochrome TV. It uses a directly-heated 3" (screen diagonal) CRT with the video modulation applied to the centre-tap of the secondary of the CRT heater transformer. It runs off 9 C cells in a holder that forms the back bottom part of the case. Mine came with a set of leaking cells in there but fortunately the holder is undamged. No corrosion on the contacts at all. I've not powered it up yet but it doesn't look too hard to repair. There's not much about it on the web, but it's in the 1972 volume of R&TVS which is on my bookshelf. So I have the circuit diagram, etc. Does anyone else have one of these sets or any other information about it. As to what I paid fpr it, I am not sure. £20 got me that set _and_ a Bush DAC90A radio (missing the mains lead/connector but otherwise looks complete and unmangled inside).

13th Dec 2018, 10:56 pm	#2
mark pirate Dekatron Join Date: Mar 2008 Location: Worthing, West Sussex, UK Posts: 5,185	Re: 'Standard' SR-V307 The Standard is a cute little set and gives a crisp picture when working well. Sounds like you got the DAC90 for a good price, the Standard was a nice little bonus! Mark

13th Dec 2018, 11:10 pm	#3
Restoration73 Nonode Join Date: Jun 2013 Location: Surbiton, SW London, UK. Posts: 2,801	Re: 'Standard' SR-V307 I had the NTSC version badged as "Minny TV" which had a 14-position turret tuner (channels 2-14 & U) to the right of the uhf knob which was the IF amplifier for the basic uhf tuner. Standard Radio later got into the amateur radio market and was absorbed by Yaesu (Standard Vertex) around 1999. They even had a factory in Shannon ROI in the mid 60's.

14th Dec 2018, 5:50 am	#4
TonyDuell Dekatron Join Date: Jun 2015 Location: Biggin Hill, London, UK. Posts: 5,208	Re: 'Standard' SR-V307 Restoration73 : Mine is the UHF-only model but I had noticed a little PCB with a 1 transistor IF amplifier on it ('Board 2' in the service information I have) that feeds the input of the main IF amplifier ('Board 4'). I wondered if that was to replace a VHF tuner that had acted as an IF amplifier on UHF. Mark : To be honest I was more attracted to the SR-V307 than to the DAC90A (!). Yes I know the latter is an 'iconic' design but to me it's just a 4 valve + rectifier superhet radio. The TV looks to be more interesting electronically and it _is_ cute

14th Dec 2018, 12:21 pm	#5
Maarten Dekatron Join Date: Dec 2007 Location: Haarlem, Netherlands Posts: 4,199	Re: 'Standard' SR-V307 The consumer electronics branch of Standard radio went on to become Marantz a long time ago. They may have kept the Standard name on communications equipment until that branch was sold to Yaesu.

14th Dec 2018, 2:25 pm	#6
TonyDuell Dekatron Join Date: Jun 2015 Location: Biggin Hill, London, UK. Posts: 5,208	Re: 'Standard' SR-V307 Getting back to this little TV. I've cleaned up the case and looked about inside. I couldn't see any obvious signs of problems so I gave it 12V from my bench supply. I got some glow on the screen, so I connected my old Manor Supplies pattern generator to the aerial input. After fiddling with the hold controls I got a reasonable picture. Even better after a shot of propan-2-ol to the vertical hold control kept the vertical oscilaltor on-frequency. I've put it back together for the moment. I suspect the other controls could do with cleaning too, but at least there are no major problems with it.