... the branding on the front

See posts 12 and 13.

Gents, are you referring to the decal on the cabinet? That simply says ‘Stereophonic’ there are a couple of letters missing. there is no other branding (or indeed anything else) on the cabinet.

6AN7 Pentagrid converter.
6BR5 Tuning indicator with Triode.
6N8 Pentode with dual diodes (Remote cut off) Possibly last IF & detector/ AGC
6BH5 RF Pentode Perhaps 1st RF
EF86 Sharp cut off AF Pentode (driver for 6BQ5?)
6BQ5 Power out put Pentode.
6CG7 Medium mu Twin triode. Audio amp pre amp for turntable.

Some ideas

The snake is likely "S"

The snake is likely "S"

See posts 12, 13 and 17.

Yes! I realise its not a snake but if it had a head like one that may relate to a brand. Meanwhile the snake in here is amusing. She lives about six feet from mine, keeps an eye on things & will line up at the door if she gets locked out.

The Mouse hunt is always interesting if one gets in.

Had a look on Radio Museum. There is one uncommon local radio manf that used that valve but that valve quantity is not mentioned,but it was only used here.

Reverse engineering is starting to look like the go. There is a way to go about it; But it is tedious and an AutoCAD useful as a starting point.

Marc

Nice veneer, birch? Turntable Garrard RC 100? Cartridge Ronette?

I have developed a hate of of some of those changer turntables. Too much over engineering making them unreliable as a changer and likely to drop even a small stack onto the tone arm.

They are supposed to be serviced around 500 Hrs which rarely happens. That coupled with storage should be a warning that it will need servicing, which will invariably be removing dried Grease soap.

Philips used Shell Alvania II on some of their stuff. This will be obsolete however, mixing grease brands and types can and will cause the soap to go solid and have no lubricating properties. All the old stuff has to be removed.

That unit looks to be one made by Classic Radio going by the dial plate.

A mate of mine had one very similar in the early 1960's and I still have a solid state tuner/amp made by them in 1978 and its radio dial is remarkably similar in style.

The so called "snaky" bit is I am sure is the start of Stereophonic on that badge.

My mate's unit had a pair of Rola 8MX speakers installed along with a Collaro turntable which that one in the pic looks to be...cannot read that badge on it though so just guessing.

Thanks

Yes it’s a Collaro turntable and I’m well aware of the issues with them. Once cleaned up and properly lubricated they tend to be ok.

I have not heard of Classic Radios before, someone on another forum also suggested the same. Is there anyone who would have service info on them?

There were two "Classic" radio firms - one in Melbourne, the other in Sydney. They were not related to each other in any way.

As far as I know, the Melbourne Classic Radio firm never made stereophonic equipment.

The changer is a Collaro Conquest, stereo version. Nice changer when working properly. These date from 1958 to 1961.

QUOTE: Classic Radio & Television Pty. Ltd.

230 Collins Street, Melbourne, Victoria.
10A Claremont Avenue, Malvern, Victoria. (1946 – 1952)
80-90 Waverley Road, East Malvern, Victoria. (1952 – 1960)

Classic Radio Pty. Ltd. manufactured large radiograms, often with cocktail bars incorporated and Televisions in the late 1950’s. This company was not affiliated Classic Radio Pty. Ltd., Sydney, NSW.

The cabinets were made by Creative Cabinets Pty. Ltd. and Cavalcade Radio Pty. Ltd. marketed the radios and TV’s with showrooms at 271 Pitt Street, Sydney, NSW and 230 Collins Street, Melbourne, Victoria. Both companies were subsidiaries of Classic Radio, grouped as the Classic Group

The valve line-up is quite similar to my 10-valve unit. Mine has a EM84 vs the 6BR5 in your unit. They both display the indication on the side of the valve.

The tuner lineup is similar too, mine has 6BH5 RF amp, 6AN7, 6BH5 IF amp and 6AL5 diodes. Yours has the 6BH5 and 6AL5 combined in the 6N8.

Only the rectifier is completely different, mine having a 6V4 (which I replaced with a 6CA4), while you have the oddball GZ32. Fortunately if it blows there's lots of plug-compatible replacements.

As for one channel dead, remember you have the working channel to compare voltages with. So, first thing is to swap the 6BQ5's around and see if the fault moves or stays. It might be just a bad speaker connection. It shouldn't be hard to work out.

The valve line-up is quite similar to my 10-valve unit.

So you don't know the brand of yours,either?

It is amazing when looking and participating in (Moderator) American Radio Forum. Just how many jump in the deep end with stereo amps.

The amps are duplicates. It is absolute folly to touch the working amp. to do anything other than tube jockeying. Many do not do that and reap the penalty. Everything you need to know, measure & compare is manifest in that working amp.

You can even use an Oscilloscope / signal tracer & audio generator to see where the signal stops: "Simplesness" (TV add).

So you don't know the brand of yours,either?

See https://vintage-radio.com.au/default.asp?f=2&th=647
Ignore the part about it being broken, I repaired it ages ago. Works well as ever.
The main thing is although the technologies are similar, mine is mono only.