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Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment. |
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16th Jul 2019, 7:39 pm | #1 |
Retired Dormant Member
Join Date: Jul 2019
Location: Brighton, East Sussex, UK.
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Valve amp identification
Hi I was wondering if you could help me. I found an old valve amplifier in a junk shop and wondered if you could help me identify it? I'd love to be able to restore it but have no idea what each wire is for what and what the knobs even do.
It turns on and left knob is power on then volume I presume. The right knob clicks into 3 positions. Not sure what this means it was used for? Any help you could give me would be great. Even if its just some guidance on where to connect a speaker to see if it works! Thanks, |
16th Jul 2019, 7:43 pm | #2 |
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Re: Valve amp identification
That is, or was, a radio. Note the IF Transformers, tuning coils trimmer capacitors and cut out for the tuning scale.
What valves are fitted?
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16th Jul 2019, 8:23 pm | #3 |
Dekatron
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Location: Cornwall, UK.
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Re: Valve amp identification
6K8G, 6K7G, 6Q7G, 6V6G....6X5G?
The tuning capacitor is missing along with the tuning mechanism and tuning scale and the audio output transformer might be missing, other bits might be missing too. The three position switch will be the waveband switch, originally it most likely would have covered the Medium Wave band, the Long Wave band and one of the Short Wave bands. Lawrence. |
16th Jul 2019, 9:01 pm | #4 |
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Re: Valve amp identification
Basically it's only any good for parts. It WAS a radio as already stated but has been severely robbed of essential parts. As it is, the valves might be worth selling on eBay for about a fiver each.
Sorry but it's useless as it is.
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17th Jul 2019, 3:11 am | #5 |
Octode
Join Date: Aug 2003
Location: Welwyn Garden City, Herts. UK.
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Re: Valve amp identification
And there is no output transformer which would have been mounted on the speaker which is also missing.
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17th Jul 2019, 8:54 am | #6 |
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Re: Valve amp identification
It looks very similar to but not exactly the same as a Cossor 464 chassis possibly a 463
Most Cossor sets of this period had the supply taps on the transformer making me think this is an export model or possibly from a gram. Cheers Mike T
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17th Jul 2019, 4:03 pm | #7 |
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Re: Valve amp identification
For the sake of safely I would advise the OP to not attempt to plug in to the mains as it cannot work as it is. Leave well alone and sell as spares on ebay. It's not an amplifier anyway.
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17th Jul 2019, 4:57 pm | #8 |
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Re: Valve amp identification
I totally agree with Sideband. It's the remains of an old radio and not worth bothering with, and is worth around a fiver for the valves and possibly the mains transformer.
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17th Jul 2019, 5:17 pm | #9 |
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Re: Valve amp identification
I also agree. You can clearly see the cutout in the chassis where the speaker would have fitted. It dates from the 1940s and is effectively unrestorable in its current condition.
Don't attempt to power it up, it won't work and you may get a shock. |
17th Jul 2019, 5:26 pm | #10 |
Dekatron
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Re: Valve amp identification
When I saw the photos, I immediately thought, "Old radio, partially complete. No tuning capacitor, but RF coils and IF transformers still there, plus (obviously) valves and mains transformer."
No use as-is, though the valves look visually OK. If heaters are intact, may be worth advertising them on eBay or whatever, couple of quid each as otherwise untested. |
17th Jul 2019, 6:37 pm | #11 |
Rest in Peace
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Re: Valve amp identification
If you bought this as a valve amplifier then I am sorry to say, you were done.
I advise like the others, that you dont mess with it just try and sell for £5 as spares. Mike |
18th Jul 2019, 7:26 am | #12 |
Octode
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Location: Llandeilo, West Wales, UK.
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Re: Valve amp identification
Sad to say there appears to be more and more old radio chassis being sold as 'valve amplifiers' these days.
I guess a lot of traders actually do not know (being kind) what they do or do not have... It's got valves so I thought it was an amplifier?
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18th Jul 2019, 9:53 am | #13 |
Dekatron
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Re: Valve amp identification
Three of the valves and the mains transformer and the chassis could be used with a quantity of new parts to make a simple low power (about 3 watts) amplifier. In addition, a new output transformer would be needed- about £15-£20.
Effectively, though, a complete and working radio with a "Gram" input already has this capability and is a radio as well. Looks like we've lost the OP though......
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