Ye olde TV sound tuners

On Fri, 24 Oct 2014 16:47:19 +0100, "Brian Gaff"
wrote:

Yes, I saw one of those many moons ago. It had, I think a Fireball tuner in
it.
I'm sure others could be used though, not much to choose.
With regard to drift on the sound receivers for fm at uhf, the one I had
had a kind of self locking setting on a button. That worked well at uhf,
but the am sound on vhf, particularly itv did drift a bit.
They used those Mullard tuners 1042 and 1043. I used to test and align m
modules with those back in the day. Some very crude dodges to stop uhf
instability at times, like taking the lid off and bending the lines inside..
grin.
Now we seem to all have little miniscule things as tuners.
Brian


Those were probebly the first thing I worked on that had SMD
components.

We didn't get any special tools or soldering arrangements though.

--

Graham.

%Profound_observation%

Brian Gaff wrote:

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.

Brian, did you mean "varicap"?

--
SteveT

Steve Thackery wrote:

Brian, did you mean "varicap"?

Sorry, I should have worded that much better. I was asking if the
tuner used varicap diodes, or air-spaced variable capacitors with
moveable vanes.

--
SteveT

On Sat, 25 Oct 2014 04:13:41 -0500, "Steve Thackery"
wrote:

Steve Thackery wrote:

Brian, did you mean "varicap"?

Sorry, I should have worded that much better. I was asking if the
tuner used varicap diodes, or air-spaced variable capacitors with
moveable vanes.

I am sure he meant varicap because he mentioned the multi-turn pot
push button units. The ELC1042 was available in the late '70s and the
1043 a bit later.
The 1042 would tune down to the amateur ATV part of 70cms without any
modification.

--

Graham.

%Profound_observation%

Graham. wrote:

I am sure he meant varicap because he mentioned the multi-turn pot
push button units. The ELC1042 was available in the late '70s and the
1043 a bit later.
The 1042 would tune down to the amateur ATV part of 70cms without any
modification.

That's fascinating - thanks, Graham.

--
SteveT

In article , Steve Thackery
scribeth thus
Graham. wrote:

I am sure he meant varicap because he mentioned the multi-turn pot
push button units. The ELC1042 was available in the late '70s and the
1043 a bit later.
The 1042 would tune down to the amateur ATV part of 70cms without any
modification.

That's fascinating - thanks, Graham.


Still have a Panasonic TV that was designed for sound it has a small 5
inch screen on it and years ago I added in a meter on the front that
measured the AGC line and put a few rechargeable batteries therein and
for quite sometime it was very useful for sorting out "Ghosting" as you
could take it up on the roof top with you and see the picture as you
moved the aerial around.

Now sadly redundant, must get around to taking out the very nice Sifam
meter before it goes to the tip...
--
Tony Sayer

"tony sayer" wrote in message
...
Now sadly redundant, must get around to taking out the very nice Sifam
meter before it goes to the tip...

How is signal strength and quality (freedom from multi-path) determined
nowadays when aerials are installed? Is it done by meter or by looking at
the end result by watching channels on each of the multiplexes? I know that
a lot of set top boxes have some form of signal strength display for each
mux, but you don't usually get any indication as whether you've got a strong
signal that's denatured by lots of multipath and co-channel interference.

I forgot to watch when we had our aerial upgraded to a wideband one (the
older grouped aerial for analogue was deaf to one of the multiplexes). When
I had an aerial fitted about 15 years ago, when analogue was still the main
means of reception, the fitter had a device very much like you describe: a
small TV screen and a signal strength meter, fitted into a rugged case.

NY wrote:
"tony sayer" wrote in message
...
Now sadly redundant, must get around to taking out the very nice Sifam
meter before it goes to the tip...

How is signal strength and quality determined
nowadays when aerials are installed?

Various test gear will give signal strength, s/n raio, and Bit Error Ratio.

http://www.pulsat.com/products/Proma...d=Cj0KEQjwlK2i
BRDk0Jnjso6AgM0BEiQAdX-iYxx4-2HzhAS6BDwfKzM6wTaSWXN4Vaiqycryfxplf-caAl6T8P8HAQ

Bill

On Fri, 24 Oct 2014 16:54:12 +0100
"Brian Gaff" wrote:

Peak Sound?
I saw one of those, but it did not have a hum ehen I heard it, so
maybe you were the victim of the old kit problem of alternative
components supplied which was a real pain.

Brian


Might have been. It had a folded drilled aluminium chassis, and all
parts were mounted to it. Long gone now, it gave way to a Goodmans
Module 80 Receiver, which I still have. I repaired that (it gained a
sudden hum!) a couple of years ago, with much appreciated help from
these 'ere newsgroup folks.

--
Davey.