Wurlitzer Lyric Amp circuit - UK Vintage Radio Repair and Restoration Discussion Forum

Norman Raeburn · 20th Nov 2019, 8:32 pm

Hi Folks, I have been given an amplifier to look at from a Lyric Jukebox (1978/9). I don't have any further info on the model. The amp is a model S79 and has two pairs of 2N3055's in it and a board with the drivers. There are also two festoon lamps which are I think in series with the speakers. I have checked the output transistors in circuit and they seem ok, I will probably need to disconnect them to check thoroughly. I have not powered this up yet as I don't want to damage anything. Does anyone have any service info on this amp please. I have googled it but could only find one picture. Any help gratefully received. Norman

Alistair D · 20th Nov 2019, 9:42 pm

This thread gives a source of cheap manuals if no-one has what you need.
https://www.vintage-radio.net/forum/...ad.php?t=73246

Al

vidjoman · 20th Nov 2019, 10:50 pm

Had a look at my manuals but the only Lyric amp circuit that I have has got ECL86 valves in it. I've done several transistor versions (there seem to be many variants) but never had a manual. They are pretty basic and recall that the outputs were transformer driven. They are, after all, a cheap Wurlitzer from the German company.

sortedradio · 21st Nov 2019, 1:06 pm

Hi Norman,
I have a copy of the Lyric 1977 manual, which I don't think will be much different to the 1978. I will send you a pdf if you message me your email. It is too big at just over 17MB to post here.

20th Nov 2019, 8:32 pm	#1
Norman Raeburn Heptode Join Date: Feb 2008 Location: Leven, Fife, Scotland Posts: 823	Wurlitzer Lyric Amp circuit Hi Folks, I have been given an amplifier to look at from a Lyric Jukebox (1978/9). I don't have any further info on the model. The amp is a model S79 and has two pairs of 2N3055's in it and a board with the drivers. There are also two festoon lamps which are I think in series with the speakers. I have checked the output transistors in circuit and they seem ok, I will probably need to disconnect them to check thoroughly. I have not powered this up yet as I don't want to damage anything. Does anyone have any service info on this amp please. I have googled it but could only find one picture. Any help gratefully received. Norman

20th Nov 2019, 9:42 pm	#2
Alistair D Nonode Join Date: Jan 2010 Location: Edinburgh, UK. Posts: 2,008	Re: Wurlitzer Lyric Amp circuit This thread gives a source of cheap manuals if no-one has what you need. https://www.vintage-radio.net/forum/...ad.php?t=73246 Al __________________ I won't tell you how I discovered that.

20th Nov 2019, 10:50 pm	#3
vidjoman Dekatron Join Date: Jun 2013 Location: East Sussex, UK. Posts: 3,326	Re: Wurlitzer Lyric Amp circuit Had a look at my manuals but the only Lyric amp circuit that I have has got ECL86 valves in it. I've done several transistor versions (there seem to be many variants) but never had a manual. They are pretty basic and recall that the outputs were transformer driven. They are, after all, a cheap Wurlitzer from the German company.

21st Nov 2019, 1:06 pm	#4
sortedradio Heptode Join Date: Jan 2008 Location: Sheffield, South Yorkshire, UK. Posts: 656	Re: Wurlitzer Lyric Amp circuit Hi Norman, I have a copy of the Lyric 1977 manual, which I don't think will be much different to the 1978. I will send you a pdf if you message me your email. It is too big at just over 17MB to post here. __________________ Martin BVWS member GQRP Club