Golborne Vintage Radio

I've just found this valve amplifier lurking in my stores. The chassis metalwork looks professional but the under chassis wiring looks a bit DIY. The cage over the top could well be a later addition. Possibly built from a kit? Does anyone recognise it?

2x EL34 push-pull into a Radiospares Heavy Duty output transformer
1x GZ34 rectifier
1x ECC83
2x EF86, in screening cans

All valves are Pinnacle or unbranded.

Good hefty looking mains transformer.

From the front panel , it looks like it was aimed more at PA than domestic hifi, though the valve and transformer line-up suggests rather better quality than much PA.

I'm thinking of flogging it at the NVCF. Any idea how much I should ask?

I remember those, It looks like one of the mid 1960s "Linear" brand or one of it's derivatives. It could be from a kit, but then the factory ones were cheaply put togther. The caps have been replaced as has the output transformer, a weak spot.

Sold to Pubs, small halls and Pop groups at the time. The top cage is original.

Brian

That looks very much like a Linear conchord or L50 amplifier. They were a budget amplifier and not well respected in the amplifier business. Some were also branded RSC. 

Here is a link to the schematics http://www.chambonino.com/carlsbro/carlwires.html

Al

Sorry cross posted with beamcurrent

Thanks for the quick ID. the schematic looks about right. They weren't exactly proud of their name, as I can't see any branding at all on the amp.

Since it looks like a proper 8 ohm output, from the RS output transformer it's got to be worth £75-£100 to someone, if slightly tidied up.
For some reason RS output transformers command quite a price secondhand, and that mains transformer looks rather fine as well, even if the audiofool thought police would say it doesn't visually match the output transformer! 8 ohm amps will have been designed for a better frequency response from the outset so are a lot better bet than a PA amp (100V line).
And then there are (hopefully) good valves in it.
What do others think?
If NVCF doesn't raise interest at a good price, try Audiojumble.

Thanks Jeremy. We can price it up on the day and see how it goes.