Next up Radiograms?
 

I've seen a few published discs intended to be played at 80rpm.
Perhaps somebody thought it was a nicer number. Frankly the tolerance
wasn't that great anyway, hence the speed control on most players.

As for starting in the centre, it was normal for professional
broadcast recordings, and I think early movie soundtracks, to use edge
and centre starts on altenate discs, so that the change in background
noise would be less noticeable.

Rod.

On Sat, 17 Jan 2015 09:09:58 -0000, "Brian Gaff"
wrote:

And who remembers Pathe discs. What idiot used 90 rpm and starting in the
middle and playing outwards?

Brian

--
From the Sofa of Brian Gaff Reply address is active
"Indy Jess John" wrote in message
...
On 16/01/2015 17:22, the dog from that film you saw wrote:

had one of those 'stack 7 singles to play in turn' record players and a
long radio tuning display that was about 24 inches long, it glowed in a
lovely orange when on.

I have seen one with a 78rpm motor (and a + or - slider for some variation
but it certainly didn't get down to 45rpm) and a head containing magnet
and coil which took a steel needle held in by a screw. It had an
autochanger which could hold about 6 records, but unless extra long play
needles were used, you couldn't play 6 sides without it going too blunt to
be nice sound.

Jim

Next up Radiograms?
 

On Fri, 16 Jan 2015 23:42:31 -0000
"Max Demian" wrote:

"Brian Gaff" wrote in message
...
Ah yes dials, I used to like dials. a Dynatron radio was actually
multi coloured but it was only coloured paint on glass and
cunningly designed optics. Had a motorised tuning system for its
presets, so the pointer moved and you could hear it tuning when you
pushed a preset. Very cunning and also very prone to get stuck when
it was older! Sigh.
Strangely the cheap bakelite dropper run radios went on for ever
even with the huge blister in the top where the dropper cooked the
cabinet.

Those things were lethal as the chassis was live and the aerial
simply had a capacitor between the terminal and the live set
inside. Elf and Safety was a bit naff in those days, yet none of us
died despite regular belts off the devices, Heck you could even pay
for a shock at the amusement arcades and get your feet s rayed in
shoe shops back then.

http://en.wikipedia.org/wiki/Pedoscope

You stuck your feet in the slot at the bottom of the column and could
see the bones of your feet inside the outline of the shoe. There were
extra viewing ports at the side so a parent and shop assistant could
see too.


Yep, remember those.

--
Davey.

Next up Radiograms?
 

On Sat, 17 Jan 2015 09:07:27 -0000
"Brian Gaff" wrote:

Black market Mercury? Just as well you did not store it in aluminium
cans then.
Even at school in the late 50s/early 60s, we could legally handle
mercury in class.
Brian


Including chasing it around the desktop with bare fingers. Imagine
that now.

--
Davey.

Next up Radiograms?
 

"Brian Gaff" wrote in message
...
And who remembers Pathe discs. What idiot used 90 rpm and starting in the
middle and playing outwards?

Well modern optical discs start in the middle. It would just be difficult to
position the needle manually in the start grooves.

--
Max Demian

Next up Radiograms?
 

"Brian Gaff" wrote in message
...
And hum.

The so-called "mains energised" speakers had a "hum-bucking coil" in series
with the voice coil to cancel out induced mains hum.

Some even used the whole things as a transformer. Another wheeze was a
gram motor that was also a transformer for the mains. I think the main use
of the field coil was a choke for the psu.
Were magnets that hard to make back then? I had one from a speaker that if
you put it on the side of the fridge it took two people to remove it.
Bit like Magnatron magnets.

I think decent magnets that kept their magnetism were large and/or expensive
in the 30s.

--
Max Demian

Next up Radiograms?
 

On Sat, 17 Jan 2015 14:13:08 -0000, "Max Demian"
wrote:


Well modern optical discs start in the middle. It would just be difficult to
position the needle manually in the start grooves.

Different design requirements. The start of the track on an optical
disc is optimised for focusing servos, and the start of the track on a
gramophone disc is optimised for human beings with right hands.

Rod.

Next up Radiograms?
 

"Brian Gaff" wrote in message
...
Black market Mercury? Just as well you did not store it in aluminium cans
then.
Even at school in the late 50s/early 60s, we could legally handle mercury
in class.

A schoolmate of mine used to nick it from the school and sell it to some
shop somewhere.

--
Max Demian

Next up Radiograms?
 

On Sat, 17 Jan 2015 10:55:31 +0000, Roderick Stewart
wrote:

I've seen a few published discs intended to be played at 80rpm.
Perhaps somebody thought it was a nicer number. Frankly the tolerance
wasn't that great anyway, hence the speed control on most players.

As for starting in the centre, it was normal for professional
broadcast recordings, and I think early movie soundtracks, to use edge
and centre starts on altenate discs, so that the change in background
noise would be less noticeable.

Rod.

On Sat, 17 Jan 2015 09:09:58 -0000, "Brian Gaff"
wrote:

And who remembers Pathe discs. What idiot used 90 rpm and starting in the
middle and playing outwards?

Brian

--
From the Sofa of Brian Gaff Reply address is active
"Indy Jess John" wrote in message
...
On 16/01/2015 17:22, the dog from that film you saw wrote:

had one of those 'stack 7 singles to play in turn' record players and a
long radio tuning display that was about 24 inches long, it glowed in a
lovely orange when on.

I have seen one with a 78rpm motor (and a + or - slider for some variation
but it certainly didn't get down to 45rpm) and a head containing magnet
and coil which took a steel needle held in by a screw. It had an
autochanger which could hold about 6 records, but unless extra long play
needles were used, you couldn't play 6 sides without it going too blunt to
be nice sound.

Jim



They were cut vertically rather than laterally.
I have no doubt they did things differently to avoid paying royalties.



--

Graham.

%Profound_observation%

Next up Radiograms?
 

"charles" wrote in message
...
In article ,
Indy Jess John wrote:
On 16/01/2015 20:03, Woody wrote:
What most people overlook is that those sort of units used decent
speakers, either a Whiteley 8" or 10" (a 'proper' speaker is ever
there was one,) or as the space available deminished the
ubiquitous
EMI 6"x9" which many many radios, radiograms, and record players
of
the sixties often used.

Ah, them were't days.


I remember speakers with a field coil rather than a permanent
magnet.
They always had plenty of bass.

Indeed, the field coil was used as a choke on the HT supply.



Ah, the old hum bucking coil - and yes I did spell that correctly!


--
Woody

harrogate3 at ntlworld dot com

Next up Radiograms?
 

Davey wrote:

You stuck your feet in the slot at the bottom of the column and could
see the bones of your feet inside the outline of the shoe. There were
extra viewing ports at the side so a parent and shop assistant could
see too.


Yep, remember those.


So that's why my feet fell off when I was 10!

Bill