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Old 11th April 2013, 12:42 AM   #1
london is offline london  Canada
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Default Help needed to identify this british made Amp

Help needed to identify this British made Amp.

I got this amp and radio tuner two month ago. There is no name no model id what so ever. It has 2 5Y3 and 4 6v6. Uses cable to connect to a multiband tuner.

I am looking for schematics. thanks
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Last edited by london; 11th April 2013 at 12:50 AM.
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Old 11th April 2013, 01:33 AM   #2
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What about the other little 9-pin sitting there?

The hammertone finish seems Rogers/Cadet-ish to me but i've seen similar ivory bell covers on the PT's of some ole Electrohome chassis.... how bout a pic of the Tuner?
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Old 11th April 2013, 02:08 AM   #3
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Leo,

2X 5Y3s are good for 250 mA. and that is more than enough to support 4X 6V6s. Does the power amp PSU energize the tuner too?

I can see converting that mono setup into a stereoblock. New O/P "iron", say Edcor, would be needed. To avoid punching a hole for an additional 9 pin socket, use a single twin triode (12AX7?) as the voltage amplifier for both channels and MOSFETs (ZVN0545A?) for the "concertina" phase splitters. More or less ripping the Dyna ST35 off is what I'm aiming at.
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Last edited by Eli Duttman; 11th April 2013 at 02:09 AM. Reason: typo
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Old 11th April 2013, 02:19 AM   #4
london is offline london  Canada
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I think one 5Y3 on the top side feeds the tuner.
it uses 6LD3 which is on the top.
the pictures below are tuner
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Last edited by london; 11th April 2013 at 02:38 AM.
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Old 11th April 2013, 02:30 AM   #5
london is offline london  Canada
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all the tubes were made in England except 6v6 and 5y3.
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Old 11th April 2013, 02:47 AM   #6
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The rectifier pair would be shared amongst all the electronics. A single 5Y3 can't support 4X 6V6s.

I'm guessing the tuner is AM only, from the appearance of the variable capacitor and the 3 IF "cans".

Combine an AM tuner with a mono power amp that seems to contain a small O/P transformer in relation to its power O/P and I'm starting to think we're looking at the "guts" of a "top shelf" console radio.

The 6LD3 is a Loctal based tube that would be found in an AM radio. What is the miniature tube on the amp chassis?
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Last edited by Eli Duttman; 11th April 2013 at 02:48 AM. Reason: typo
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Old 11th April 2013, 03:00 AM   #7
TheGimp is online now TheGimp  United States
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Would it be possible to trace the license plate serial number? Does the certifying agency still exist?
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Old 11th April 2013, 03:29 AM   #8
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Well this one is intriguing...the chassis has definite British markings and hook-ups but the 6V6, 5Y3 topology isn't typically Anglo implementation for this period IMO....but I am definitely thinking Rogers/Cadet as they made some equipment here in Canada and I've had a couple of strange Rogers/Cadet types on the shelf myself.

The British license tag throws me off, however. How bout a pic of the harness? Might help narrow it down a little further or at least eliminate some possibilities.

Might be time for some of the Brits here to 'ave a look-see...DF96 and others?
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Last edited by devilsindetails; 11th April 2013 at 03:32 AM.
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Old 11th April 2013, 03:49 AM   #9
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Another look at the photos shows the tube on the amp's top IS a 6DL3. That's a rim lock, not Loctal, socket.

I'm reasonably certain, at this time, that we are dealing with a fancy radio's innards.

Beyond doubt, the power trafo is substantial. If a conversion to a HIFI stereoblock is to be made within the confines of the existing chassis, space for 2X new O/P trafos is limited. I believe 2X Edcor GX series parts could fit into the limited available space. In order to get full HIFI bandwidth, triode wired finals are necessary. That's far from bad, but approx. 6 WPC is what will be obtained and mid 90s efficient speakers are needed.
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Old 11th April 2013, 04:12 AM   #10
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I'd like to get a better view, from above, of the corner partially obscured by the power trafo in the clip I've uploaded.
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