B&O TV/Radiogram Console GPTV-609-RG - UK Vintage Radio Repair and Restoration Discussion Forum

GLENZ32 · 28th Apr 2011, 11:53 pm

This is not something you see every day especially in New Zealand. Its on a local auction site, I would love this but its too far away to just go and get.

Looks very restorable though...hopefully it gets saved and doesn't get butchered or made into some stupid modern entertainment unit.

Some info listed on the auction:

Model: Bang & Olufsen
Model: GPTV-609-RG
850mm High x 1465mm Wide x 430mm Deep
Fona Grand Prix stereo
VHF and UHF television (powers up but untested)
Turntable (tested and working)
FM Radio (Tests OK)
Sliding doors
Wooden cabinet

I gather this would be valve all the way through, looks to be from the 1960's?

Cheers
Glen

mark pirate · 29th Apr 2011, 5:16 am

That looks very nice, there have been a few tv radiograms of uk origin on ebay recently, these must be getting rare these days, wish i had the room for one!

Mark

Dillen_de · 29th Apr 2011, 8:42 am

Wonderful machine. It's from 1963.
If it has a stereo-decoder, that module will be transistor-based but the rest is all valves.
What I find particularly interesting is that it's now in New Zealand.
This photo was taken in Denmark in october 2009.

Click image for larger version

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Martin

murphyv310 · 29th Apr 2011, 9:05 am

That looks as if it is the same unit, It has the same chip out of the wood on the right hand side!

Dillen_de · 29th Apr 2011, 9:07 am

Definitely the same.
Missing power button and flaking paint at the frame, left side under the TV.

Another danish photo:

Click image for larger version

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Can't be many of them in New Zealand !
One hour left of the auction:
http://www.trademe.co.nz/Electronics...-371020510.htm

Martin

murphyv310 · 29th Apr 2011, 9:16 am

Amazing!

GLENZ32 · 29th Apr 2011, 11:15 am

Good Lord it is the same set! How on earth did it end up here in NZ! This is truly weird and what a coincidence!

Synchrodyne · 8th May 2011, 4:08 am

That’s an interesting machine. It’s hard to be 100% sure, but it looks as if the TV receiver part has its own audio controls. The raises the question as to where in the pathway was the audio switched between radiogram and TV. One might envisage a setup wherein line-level audio was fed from the TV sound channel demodulator to the radiogram amplifier section, ahead of the volume and tone controls. But maybe not. Perhaps the switching was done ahead of the audio power amplifier, or even at the speakers? What was “normal” for TV/radiogram combinations?

Cheers,

Danny · 9th May 2011, 8:12 am

Hi the norm for tv radio grams was to have a normal tvs set and gram with separate speakers or thay used part of the mains switch to connect each item to the speakers.
as decca/bush. interesting set and i bet it sound great. Danny

Synchrodyne · 22nd May 2011, 9:02 am

Thanks Danny. I guess that that arrangement makes sense, particularly for the mass-producers as it enabled the use of standard components. Though given that B&O was operating at the upper end of the market, one might have expected it to have done a little differently and for example fed the TV sound into the radiogram amplifier. Later (say 1970s) B&O TV receivers were provided with a 5-pin DIN audio outlet and when fitted with an optional internal AF isolating transformer tapped into the audio ahead of the volume control. As I recall though, the level was quite low, something like 100 mV for 100% modulation, probably aimed at tape recorder rather than amplifier inputs. (Didn’t the B&O 5000 FM tuner also have a 100 mV second AF output for tape as well as its main output variable up to 1V?)

Anyway, in the thread Beomaster 900k - Schematics at https://www.vintage-radio.net/forum/...ad.php?t=69471, roffe kindly pointed towards a site that has B&O schematics, namely: http://www.abo-center.dk/Abo_center_...amforside.html .

From this I found the schematics for the B&O Grand Prix TV 610 RG, which I imagine is similar to the item at interest in this thread. It is an assemblage of separate TV and radio chassis, switched at speaker level. The radio section (Grand Prix 610) is all-valve, with push-pull (but not distributed load) ECL86s in each channel. Its power supply includes a double-wound mains transformer, and it uses E-series valves. Provision is shown for an MPX decoder, but no details are given. The TV section (Capri TV 610) has an AC-DC power supply (somehow I would have expected better from B&O) and P-series valves, the audio output being a single PCL82. The gramophone part has a two transistor (germanium) RIAA preamplifier in each channel, with power supply from the radio unit. One wonders how different radio and TV might have sounded.

Cheers,

GLENZ32 · 22nd May 2011, 11:50 pm

Thanks for the intresting info on this B&O Synchrodyne, I wonder if the new owner has done anything with it?

28th Apr 2011, 11:53 pm	#1
GLENZ32 Hexode Join Date: Apr 2008 Location: Wellington, New Zealand Posts: 289	B&O TV/Radiogram Console GPTV-609-RG This is not something you see every day especially in New Zealand. Its on a local auction site, I would love this but its too far away to just go and get. Looks very restorable though...hopefully it gets saved and doesn't get butchered or made into some stupid modern entertainment unit. Some info listed on the auction: Model: Bang & Olufsen Model: GPTV-609-RG 850mm High x 1465mm Wide x 430mm Deep Fona Grand Prix stereo VHF and UHF television (powers up but untested) Turntable (tested and working) FM Radio (Tests OK) Sliding doors Wooden cabinet I gather this would be valve all the way through, looks to be from the 1960's? Cheers Glen Attached Thumbnails

29th Apr 2011, 5:16 am	#2
mark pirate Dekatron Join Date: Mar 2008 Location: Worthing, West Sussex, UK Posts: 5,185	Re: B&O TV/Radiogram Console GPTV-609-RG That looks very nice, there have been a few tv radiograms of uk origin on ebay recently, these must be getting rare these days, wish i had the room for one! Mark

29th Apr 2011, 8:42 am	#3
Dillen_de Tetrode Join Date: Jun 2007 Location: Copenhagen, Denmark Posts: 62	Re: B&O TV/Radiogram Console GPTV-609-RG Wonderful machine. It's from 1963. If it has a stereo-decoder, that module will be transistor-based but the rest is all valves. What I find particularly interesting is that it's now in New Zealand. This photo was taken in Denmark in october 2009. Martin Last edited by Dillen_de; 29th Apr 2011 at 8:51 am.

29th Apr 2011, 9:05 am	#4
murphyv310 Dekatron Join Date: Sep 2006 Location: Kilmarnock, Ayrshire, UK. Posts: 5,422	Re: B&O TV/Radiogram Console GPTV-609-RG That looks as if it is the same unit, It has the same chip out of the wood on the right hand side! __________________ Cheers, Trevor. MM0KJJ. RSGB, GQRP, WACRAL, K&LARC. Member

29th Apr 2011, 9:07 am	#5
Dillen_de Tetrode Join Date: Jun 2007 Location: Copenhagen, Denmark Posts: 62	Re: B&O TV/Radiogram Console GPTV-609-RG Definitely the same. Missing power button and flaking paint at the frame, left side under the TV. Another danish photo: Can't be many of them in New Zealand ! One hour left of the auction: http://www.trademe.co.nz/Electronics...-371020510.htm Martin

29th Apr 2011, 9:16 am	#6
murphyv310 Dekatron Join Date: Sep 2006 Location: Kilmarnock, Ayrshire, UK. Posts: 5,422	Re: B&O TV/Radiogram Console GPTV-609-RG Amazing! __________________ Cheers, Trevor. MM0KJJ. RSGB, GQRP, WACRAL, K&LARC. Member

29th Apr 2011, 11:15 am	#7
GLENZ32 Hexode Join Date: Apr 2008 Location: Wellington, New Zealand Posts: 289	Re: B&O TV/Radiogram Console GPTV-609-RG Good Lord it is the same set! How on earth did it end up here in NZ! This is truly weird and what a coincidence!

8th May 2011, 4:08 am	#8
Synchrodyne Nonode Join Date: Jan 2009 Location: Papamoa Beach, Bay of Plenty, New Zealand Posts: 2,944	Re: B&O TV/Radiogram Console GPTV-609-RG That’s an interesting machine. It’s hard to be 100% sure, but it looks as if the TV receiver part has its own audio controls. The raises the question as to where in the pathway was the audio switched between radiogram and TV. One might envisage a setup wherein line-level audio was fed from the TV sound channel demodulator to the radiogram amplifier section, ahead of the volume and tone controls. But maybe not. Perhaps the switching was done ahead of the audio power amplifier, or even at the speakers? What was “normal” for TV/radiogram combinations? Cheers,

9th May 2011, 8:12 am	#9
Danny Heptode Join Date: Jul 2003 Location: North Walsham, Norfolk, UK. Posts: 516	Re: B&O TV/Radiogram Console GPTV-609-RG Hi the norm for tv radio grams was to have a normal tvs set and gram with separate speakers or thay used part of the mains switch to connect each item to the speakers. as decca/bush. interesting set and i bet it sound great. Danny

22nd May 2011, 9:02 am	#10
Synchrodyne Nonode Join Date: Jan 2009 Location: Papamoa Beach, Bay of Plenty, New Zealand Posts: 2,944	Re: B&O TV/Radiogram Console GPTV-609-RG Thanks Danny. I guess that that arrangement makes sense, particularly for the mass-producers as it enabled the use of standard components. Though given that B&O was operating at the upper end of the market, one might have expected it to have done a little differently and for example fed the TV sound into the radiogram amplifier. Later (say 1970s) B&O TV receivers were provided with a 5-pin DIN audio outlet and when fitted with an optional internal AF isolating transformer tapped into the audio ahead of the volume control. As I recall though, the level was quite low, something like 100 mV for 100% modulation, probably aimed at tape recorder rather than amplifier inputs. (Didn’t the B&O 5000 FM tuner also have a 100 mV second AF output for tape as well as its main output variable up to 1V?) Anyway, in the thread Beomaster 900k - Schematics at https://www.vintage-radio.net/forum/...ad.php?t=69471, roffe kindly pointed towards a site that has B&O schematics, namely: http://www.abo-center.dk/Abo_center_...amforside.html . From this I found the schematics for the B&O Grand Prix TV 610 RG, which I imagine is similar to the item at interest in this thread. It is an assemblage of separate TV and radio chassis, switched at speaker level. The radio section (Grand Prix 610) is all-valve, with push-pull (but not distributed load) ECL86s in each channel. Its power supply includes a double-wound mains transformer, and it uses E-series valves. Provision is shown for an MPX decoder, but no details are given. The TV section (Capri TV 610) has an AC-DC power supply (somehow I would have expected better from B&O) and P-series valves, the audio output being a single PCL82. The gramophone part has a two transistor (germanium) RIAA preamplifier in each channel, with power supply from the radio unit. One wonders how different radio and TV might have sounded. Cheers,

22nd May 2011, 11:50 pm	#11
GLENZ32 Hexode Join Date: Apr 2008 Location: Wellington, New Zealand Posts: 289	Re: B&O TV/Radiogram Console GPTV-609-RG Thanks for the intresting info on this B&O Synchrodyne, I wonder if the new owner has done anything with it?