Identity of amp unit. - UK Vintage Radio Repair and Restoration Discussion Forum

linescan87 · 28th Jun 2017, 7:29 pm

Hi All,

Does anyone here recognise this amp unit? I am told it came from a reel to reel tape player. Valve line up EF86(x2), EL84(x2), EZ80 and EM84.

Cheers,
John Joe.

brenellic2000 · 29th Jun 2017, 9:43 am

I don't immediately recognise it from any British tape-recorder though the knobs were used by several, mainly budget decks. I would suggest it is one of the High Street radio shop tape-recorder amp offerings such a from Stern-Clyne, Lasky.... of the early/mid-1950s.

llama · 29th Jun 2017, 10:43 am

It's the two EL84s that puzzle me. Mostly a single EL84 would be used switched between audio output and erase/bias oscillator duties. Maybe this points to its use with a 3-head deck.
Apart from that, the pairs of jacks each side with controls in between looks like the Stern's implementation of the classic Mullard (C?) circuit.
Graham

linescan87 · 4th Jul 2017, 11:38 am

Thanks for the replies, when I first seen it I thought it might be push pull output, but I can now see the second EL84 has nothing to do with the sound output. Good audio quality, I'm going to make a small box for it and use it as a general purpose amplifier.

Cheers,
John Joe.

Edward Huggins · 6th Jul 2017, 12:31 pm

This is bound to have a very high input sensitivity and would sound really good on low output Mono cartridges.

28th Jun 2017, 7:29 pm	#1
linescan87 Heptode Join Date: Mar 2014 Location: Meath, Ireland Posts: 551	Identity of amp unit. Hi All, Does anyone here recognise this amp unit? I am told it came from a reel to reel tape player. Valve line up EF86(x2), EL84(x2), EZ80 and EM84. Cheers, John Joe. Attached Thumbnails

29th Jun 2017, 9:43 am	#2
brenellic2000 Octode Join Date: Aug 2006 Location: Rye, East Sussex, UK. Posts: 1,647	Re: Identity of amp unit. I don't immediately recognise it from any British tape-recorder though the knobs were used by several, mainly budget decks. I would suggest it is one of the High Street radio shop tape-recorder amp offerings such a from Stern-Clyne, Lasky.... of the early/mid-1950s.

29th Jun 2017, 10:43 am	#3
llama Octode Join Date: Jun 2006 Location: St Osyth, Nr Clacton, Essex, UK. Posts: 1,482	Re: Identity of amp unit. It's the two EL84s that puzzle me. Mostly a single EL84 would be used switched between audio output and erase/bias oscillator duties. Maybe this points to its use with a 3-head deck. Apart from that, the pairs of jacks each side with controls in between looks like the Stern's implementation of the classic Mullard (C?) circuit. Graham __________________ Half my stuff is junk - trouble is, I don't know which half!

4th Jul 2017, 11:38 am	#4
linescan87 Heptode Join Date: Mar 2014 Location: Meath, Ireland Posts: 551	Re: Identity of amp unit. Thanks for the replies, when I first seen it I thought it might be push pull output, but I can now see the second EL84 has nothing to do with the sound output. Good audio quality, I'm going to make a small box for it and use it as a general purpose amplifier. Cheers, John Joe.

6th Jul 2017, 12:31 pm	#5
Edward Huggins Dekatron Join Date: Sep 2015 Location: Southwold, Suffolk, UK. Posts: 8,328	Re: Identity of amp unit. This is bound to have a very high input sensitivity and would sound really good on low output Mono cartridges. __________________ Edward.