On 25/11/2016 15:27, Dave Plowman (News) wrote:
In article ,
Jim Lesurf wrote:
I've been working though a folder of old Ferrograph documents, scanning
them to put onto the ukhhsoc website. I came across a circuit diagram that
doesn't look to me like it is of any Ferrograph item. Presumably mis-filed
at some ancient time.

I have put a copy at

http://jcgl.orpheusweb.co.uk/temp/Unknown.jpeg (about 3MB file)

Can anyone recogise this and say what it is?

Did Ferrograph ever use DIN connectors? Also can't say I can remember ever
seeing a 5 pin DIN used as a headphone socket. Sounds like something
Grundig would do. ;-)


I remember my Dad had a Grundig TK40 and that used 5 pin DINs for all
the connectors.

--
Graeme Wall
This account not read.

In article ,
Graeme Wall wrote:
On 25/11/2016 15:27, Dave Plowman (News) wrote:
In article ,
Jim Lesurf wrote:
I've been working though a folder of old Ferrograph documents,
scanning them to put onto the ukhhsoc website. I came across a
circuit diagram that doesn't look to me like it is of any Ferrograph
item. Presumably mis-filed at some ancient time.

I have put a copy at

http://jcgl.orpheusweb.co.uk/temp/Unknown.jpeg (about 3MB file)

Can anyone recogise this and say what it is?

Did Ferrograph ever use DIN connectors? Also can't say I can remember
ever seeing a 5 pin DIN used as a headphone socket. Sounds like
something Grundig would do. ;-)


I remember my Dad had a Grundig TK40 and that used 5 pin DINs for all
the connectors.

DIN connectors were pretty common on most German stuff at one time.
Odd given the German reputation (and rightly so) for engineering things
well. Spawn of satan, DIN connectors. ;-)

--
*In some places, C:\ is the root of all directories *

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

On 26/11/2016 01:23, Dave Plowman (News) wrote:

DIN connectors were pretty common on most German stuff at one time.
Odd given the German reputation (and rightly so) for engineering things
well. Spawn of satan, DIN connectors. ;-)

An odd point of view, considering the alternative.
Who would design a plug that connects the signal before the ground?
And which leaves the signal pin so exposed when a cable is connected at one end only?
I'm sure that phono connectors have resulted in much needless destruction.

--
Eiron.

In article ,
Eiron wrote:
On 26/11/2016 01:23, Dave Plowman (News) wrote:

DIN connectors were pretty common on most German stuff at one time.
Odd given the German reputation (and rightly so) for engineering things
well. Spawn of satan, DIN connectors. ;-)

An odd point of view, considering the alternative.

Lots of alternatives.

Who would design a plug that connects the signal before the ground?

Why would that matter? No domestic connector like that is designed to be
plugged and unplugged regularly. Unlike, say, a charger lead to your
phone. Or headphones.

And which leaves the signal pin so exposed when a cable is connected at
one end only? I'm sure that phono connectors have resulted in much
needless destruction.

Destruction of what?

Problem with the standard quality DIN sockets and leads found on domestic
equipment is they become unreliable long before a similar phono does.

You can buy good quality connectors to the same format as DIN, though.

--
*I'm not a paranoid, deranged millionaire. Dammit, I'm a billionaire.

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

On Sat, 26 Nov 2016 01:23:05 +0000, Dave Plowman (News) wrote:

In article ,
Graeme Wall wrote:
On 25/11/2016 15:27, Dave Plowman (News) wrote:
In article ,
Jim Lesurf wrote:
I've been working though a folder of old Ferrograph documents,
scanning them to put onto the ukhhsoc website. I came across a
circuit diagram that doesn't look to me like it is of any Ferrograph
item. Presumably mis-filed at some ancient time.

I have put a copy at

http://jcgl.orpheusweb.co.uk/temp/Unknown.jpeg (about 3MB file)

Can anyone recogise this and say what it is?

Did Ferrograph ever use DIN connectors? Also can't say I can remember
ever seeing a 5 pin DIN used as a headphone socket. Sounds like
something Grundig would do. ;-)


I remember my Dad had a Grundig TK40 and that used 5 pin DINs for all
the connectors.

DIN connectors were pretty common on most German stuff at one time. Odd
given the German reputation (and rightly so) for engineering things
well. Spawn of satan, DIN connectors. ;-)

Yes they were! They may have gained some kudos if they'd thought to
insist that pins 1 (and 4) were *only* ever designated as inputs and pins
3 (and 5) *only* as outputs so that the only legitimate 5 or 3 pin DIN
connecting cables were wired as cross-over types but they overlooked this
opportunity to enforce a commonsense standard that would have curtailed
the profiteering opportunities in the interconnect marketplace, a feature
that would have endeared this interconnect standard to the "Hi-Fi buying
Public".

The only advantage of the constant current sources into virtual earth
sinks system was the ease with which you can mix the outputs from several
sources into one virtual earth sink (and the capability to bridge stereo
pairs to downmix to mono without inducing distortion in the source
amplifiers), otherwise (discounting the stereo into mono feature) it
makes more sense to use constant voltage sources feeding mid to high Z
sinks as is more typically the case with the phono plug and socket
alternative.

--
Johnny B Good