Ye olde TV sound tuners
 

I seem to remember that some time ago we discussed various devices in
use in the 1970s to feed TV audio into the hi-fi system. A visit to my
loft this evening (Kate wants to borrow my video tripod) found this
device. I had completely forgotten about it, but seeing it I do remember
making it and using it with success. It appears to have a dual function
as FM aerial selector as well as UHF TV sound tuner. Note that the
chassis is made from a double bend sign.

https://www.dropbox.com/sh/zeoaqmrqh...GJVBlXLsa?dl=0

Bill

Ye olde TV sound tuners
 

I have a commercial one, probably won't work now, by Motion Electronics. Has
the usual varicap twiddle buttons on the front and the inners click to
select band 1 3 and uhf. The latter of course being FM. There was a version
with fm stereo as well.



Does anyone remember the Celestion device which was a 6Mhz amplifier and FM
detector which had a probe you glued to the back of the tv. It worked by
detecting the leakage from the intercarrier sound from the IF strip.
I never got it to work very well. Did my back in fiddling around the back
of the tv tring to find the best spot.
Brian

--
From the Sofa of Brian Gaff Reply address is active
"Bill Wright" wrote in message
...
I seem to remember that some time ago we discussed various devices in use
in the 1970s to feed TV audio into the hi-fi system. A visit to my loft
this evening (Kate wants to borrow my video tripod) found this device. I
had completely forgotten about it, but seeing it I do remember making it
and using it with success. It appears to have a dual function as FM aerial
selector as well as UHF TV sound tuner. Note that the chassis is made from
a double bend sign.

https://www.dropbox.com/sh/zeoaqmrqh...GJVBlXLsa?dl=0

Bill

Ye olde TV sound tuners
 

In message , Brian Gaff
writes






Does anyone remember the Celestion device which was a 6Mhz amplifier and FM
detector which had a probe you glued to the back of the tv. It worked by
detecting the leakage from the intercarrier sound from the IF strip.
I never got it to work very well. Did my back in fiddling around the back
of the tv tring to find the best spot.

In the early 80s, I made a couple of baccy tin TV sound extractors (one
for me, and one for a works colleague). They were dead simple. The
signal was extracted from the TV using a coupling loop near the
circuitry of one of the 6MHz sound IF transformer cans (positioned for
maximum signal). In the baccy tin was a crystal oscillator and a
double-balanced diode ring mixer, which converted the 6MHz up into the
FM radio band. It was one of my 'heroic successes'. My colleague was
chuffed to death with his, and used it quite a lot,


--
Ian

Ye olde TV sound tuners
 

On 24/10/2014 04:47, Bill Wright wrote:
I seem to remember that some time ago we discussed various devices in
use in the 1970s to feed TV audio into the hi-fi system. A visit to my
loft this evening (Kate wants to borrow my video tripod) found this
device. I had completely forgotten about it, but seeing it I do remember
making it and using it with success. It appears to have a dual function
as FM aerial selector as well as UHF TV sound tuner. Note that the
chassis is made from a double bend sign.

https://www.dropbox.com/sh/zeoaqmrqh...GJVBlXLsa?dl=0

Bill

Somewhere in my attic I have a TV sound tuner. I bought it in a jumble
sale, and it did work (though not particularly well). It had a turret
tuner, two positions pre-labelled for BBC and ITV (at the 405 line
frequencies) and three other tuner positions for VHF/FM radio. Each
position was tuned with a screwdriver through a strategically placed hole.

It was originally an assemble-it-yourself kit - I eventually found an
advert for it in kit form - so someone had obviously made it up and then
decided they didn't want it.

It was a mains powered valve unit with an aerial in and line out socket,
so it needed to be connected to an amplifier to hear anything. The case
was perforated metal to let the heat out.

It was neither fish nor fowl, I discovered. Connected to a TV aerial it
gave OK sound on the TV channels but crap reception for radio.
Connected to an indoor V aerial it gave OK reception on the radio but
crap reception for TV. Of course, once 405 line transmissions were
switched off there was noting on the TV positions and I had better FM
reception on a radio, so it became redundant.

I am pretty sure I didn't throw it away, but I don't remember where I
put it, so no photos.

Jim

Ye olde TV sound tuners
 

On 24/10/2014 04:47, Bill Wright wrote:
I seem to remember that some time ago we discussed various devices in
use in the 1970s to feed TV audio into the hi-fi system. A visit to my
loft this evening (Kate wants to borrow my video tripod) found this
device. I had completely forgotten about it, but seeing it I do remember
making it and using it with success. It appears to have a dual function
as FM aerial selector as well as UHF TV sound tuner. Note that the
chassis is made from a double bend sign.

https://www.dropbox.com/sh/zeoaqmrqh...GJVBlXLsa?dl=0

I built one late 70s. It was a from a kit from an East London based
electronic component outfit, Elecrtovalue or something like that ?

It used a Philips G8 IF strip, and a varicap tunerhead.

It never worked brilliantly, BBC 2 had carrier buzz, that I could never
completely tune out, though BBC 1 and ITV were fine. However after dark
the IF strip would pick up 'monkey chatter' presumably on 6 MHz HF
bands. Putting it in a metal case didn't really improve things.
In the end, I ditched it, and took an audio feed from my Sony
portable telly (that luckily had a earthed chassis)

--
Mark
Please replace invalid and invalid with gmx and net to reply.

Ye olde TV sound tuners
 

Ian Jackson wrote:

In message , Brian Gaff
writes






Does anyone remember the Celestion device which was a 6Mhz
amplifier and FM detector which had a probe you glued to the back
of the tv. It worked by detecting the leakage from the intercarrier
sound from the IF strip. I never got it to work very well. Did my
back in fiddling around the back of the tv tring to find the best
spot.

In the early 80s, I made a couple of baccy tin TV sound extractors
(one for me, and one for a works colleague). They were dead simple.
The signal was extracted from the TV using a coupling loop near the
circuitry of one of the 6MHz sound IF transformer cans (positioned
for maximum signal). In the baccy tin was a crystal oscillator and a
double-balanced diode ring mixer, which converted the 6MHz up into
the FM radio band. It was one of my 'heroic successes'. My colleague
was chuffed to death with his, and used it quite a lot,


Sennheiser made a prototype TV sound extractor using a 6 MHz sniffer.I
may still have it in the garage :) They wanted a way of connecting
their headphones to TVs. Never saw it in production though.

Ashley

--

Ye olde TV sound tuners
 

In article ,
Mark Carver wrote:
On 24/10/2014 04:47, Bill Wright wrote:
I seem to remember that some time ago we discussed various devices in
use in the 1970s to feed TV audio into the hi-fi system. A visit to my
loft this evening (Kate wants to borrow my video tripod) found this
device. I had completely forgotten about it, but seeing it I do remember
making it and using it with success. It appears to have a dual function
as FM aerial selector as well as UHF TV sound tuner. Note that the
chassis is made from a double bend sign.

https://www.dropbox.com/sh/zeoaqmrqh...GJVBlXLsa?dl=0

I built one late 70s. It was a from a kit from an East London based
electronic component outfit, Elecrtovalue or something like that ?

Electrovalue were based in Englefield Green, near Egham, when I used them
(mid 60s). It's possible they emigrated from East London. There was also a
firm close to West Hampstead tube station who did various kits of this
type, but I can't rmemeber their name.

--
From KT24

Using a RISC OS computer running v5.18

Ye olde TV sound tuners
 

On 24/10/2014 09:26, charles wrote:
In article ,
Mark Carver wrote:

I built one late 70s. It was a from a kit from an East London based
electronic component outfit, Elecrtovalue or something like that ?

Electrovalue were based in Englefield Green, near Egham, when I used them
(mid 60s). It's possible they emigrated from East London. There was also a
firm close to West Hampstead tube station who did various kits of this
type, but I can't rmemeber their name.


My memory is going, just Googled (because we discussed this very topic
in 2011 over in u.t.b), and it was Manor Supplies.


--
Mark
Please replace invalid and invalid with gmx and net to reply.

Ye olde TV sound tuners
 

Brian Gaff wrote:
I have a commercial one, probably won't work now,
Definitely won't, with DTT.

by Motion Electronics. Has
the usual varicap twiddle buttons on the front and the inners click to
select band 1 3 and uhf. The latter of course being FM. There was a version
with fm stereo as well.


Does anyone remember the Celestion device which was a 6Mhz amplifier and FM
detector which had a probe you glued to the back of the tv. It worked by
detecting the leakage from the intercarrier sound from the IF strip.
I never got it to work very well. Did my back in fiddling around the back
of the tv tring to find the best spot.
Brian

Found one of those in the loft as well. Made by Celestion under licence
from some other firm. I seem to remember it worked pretty well.

Bill

Ye olde TV sound tuners
 

Mark Carver wrote:

It never worked brilliantly, BBC 2 had carrier buzz, that I could never
completely tune out, though BBC 1 and ITV were fine. However after dark
the IF strip would pick up 'monkey chatter' presumably on 6 MHz HF
bands. Putting it in a metal case didn't really improve things.
In the end, I ditched it, and took an audio feed from my Sony
portable telly (that luckily had a earthed chassis)

With total disregard for H & S (due to my ignorance) I fixed deaf granny
up with a pair of ex-army headphones connected to the speaker wires in
the telly.
She came to believe that they helped her rheumatics and wore them all
the time, whether or not the telly was on.

Bill