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Old 17th July 2012, 01:09 AM   #1
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Default Can anybody identify this amp?

Hello,
I am new to this blog and a relative electronics newbie.
I was wondering if anybody recognizes this amp.

Tube: 4xel84, 1x12ax7, 1xgz34. It is a mono amp push-pull type.

Attached pics of top and underside.

Any info would help.
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Old 17th July 2012, 09:33 AM   #2
DF96 is offline DF96  England
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Looks like it has been made from a kit, probably in the 1960s.
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Old 17th July 2012, 10:14 AM   #3
disco is offline disco  Netherlands
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Parallel PP EL84, good for 30 watts. At the first look a jukebox amp but it has "TV" input... so a console would be logical. Probably made in USA?
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Old 17th July 2012, 10:29 AM   #4
DF96 is offline DF96  England
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No, Europe. Two reasons: European names for valves used, and the input sockets appear to be Belling-Lee. These are widely used over here for TV antenna connections, and were for a while used for audio too.
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Old 17th July 2012, 10:34 AM   #5
DF96 is offline DF96  England
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Ignore my comment above about Belling-Lee. Another look tells me thay are phono/RCA.

I tried to edit my post but it didn't work.
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Old 17th July 2012, 12:22 PM   #6
disco is offline disco  Netherlands
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I was looking at the capacitors, seem American to me. But otoh, there was vivid export round 1960. For a German product the wireing is too sloppy (haha) I never came across that chassis build here, so probably not Dutch either. Maybe from Belgium?
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Last edited by disco; 17th July 2012 at 12:31 PM. Reason: thick fingers
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Old 17th July 2012, 12:51 PM   #7
DF96 is offline DF96  England
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Yes, the caps don't look like typical British. At the bottom right of the chassis (top view) it says Line Cord Remote something. That suggests American, as we would call it the mains lead. So why was an American kit using European valve names?

It was the sloppy wiring which made me think 'kit'.
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Old 17th July 2012, 01:30 PM   #8
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Interesting that the chassis shows a combination of European and North American valve names.
Perhaps a product of Canada?
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Old 17th July 2012, 05:10 PM   #9
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Thanks guys I appreciate this.

It does have "made in USA" stamped on it so that mystery is solved.

I am slowly making progress but without a schem it is a bit difficult.

There is a # stamped on it 14D220-2. I have searched endlessly using this # and it has been futile.
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Old 17th July 2012, 05:26 PM   #10
DF96 is offline DF96  England
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OK, wild guess: the amp was designed between 1953 (when EL84 appeared) and 1956 (when 6BQ5 US name appeared) - see EL84 and 6BQ5. Both dates are approximate, but the EL84 is a Philips design so would have appeared first in Europe.

Now consider 12AX7 (US 1947) and ECC83 (Eu 1954). If the dates can be relied on this puts the design (but not necessarily the manufacture) in 1953 or 1954 - give or take a year.

I will leave someone else to do the same exercise for the rectifier!
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