On Monday, February 19, 2001 1:06:04 AM UTC+2, Malcolm Stewart wrote:
Am doing a clear out and can offer a Powertran Electronics Linsley Hood
Amplifier complete with circuit diagram. This was an early DC coupled
design, and I think had a good reputation in its day. As amplifier is
faulty and hasn't been used for a few years, it is only suitable to
knowledgeable person with suitable test gear and access to components.

Available free from Milton Keynes, UK - taker to arrange collection or
carriage

Contact me via email if interested:

M Stewart

I am trying to repair my linsey-hood amp from about 1975. I would love a copy of the circuit diagram
hopefully !
Joy Wellbeloved
Cape Town

wrote in message
...
On Monday, February 19, 2001 1:06:04 AM UTC+2, Malcolm
Stewart wrote:
Am doing a clear out and can offer a Powertran
Electronics Linsley Hood
Amplifier complete with circuit diagram. This was an
early DC coupled
design, and I think had a good reputation in its day. As
amplifier is
faulty and hasn't been used for a few years, it is only
suitable to
knowledgeable person with suitable test gear and access
to components.

Available free from Milton Keynes, UK - taker to arrange
collection or
carriage

Contact me via email if interested:

M Stewart

I am trying to repair my linsey-hood amp from about 1975.
I would love a copy of the circuit diagram
hopefully !
Joy Wellbeloved
Cape Town



JLH came out with a few mods to it later which improved its
stability and particularly its d.c. offset drift. I think I
have that too if you want it.


--
Woody

harrogate three at ntlworld dot com

Talk about an old thread. ;-)

But while we're at it, mine has taken to go into oscillation (sometimes)
triggered by say a light being switched on or off in the same room. What I
hear sounds like mains hum, on both channels. Switching it off and on
again sorts it. Another weird fault. ;-)

--
*Give me ambiguity or give me something else.

Dave Plowman London SW
To e-mail, change noise into sound.

I am trying to repair my linsey-hood amp from about 1975.
I would love a copy of the circuit diagram hopefully !


** This is probably the power amp stage:

http://sound.au.com/tcaas/HFN11-72.gif

Looks pretty typical of that era - quasi complementary, direct coupled, low
bias class AB.

The VI limiter ( Q7, Q8) has me worried, where are the reverse diodes to
prevent C-B conduction of the limiters and where are the flyback catching
diodes across the output devices ??


.... Phil