When we had the 800 Mhz clearance some years ago, there was a trade in
800 MHz filters particularly for Transmitters still using ch 59 or ch 60

We've since then had the 700 MHz clearance so the highest TV channel
still in use is Ch 48....

it seems according to eBay theere is still demand for Ch 59 AT800
filters...

https://www.ebay.co.uk/itm/394417469035?epid=13012049915&hash=item5bd51cf66b:g:DZcAAOSwgaVjv9xn

I can only assume that people are trying to use in-house modulators on
chs 61 to 68?

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On 20/02/2023 19:29, SH wrote:

When we had the 800 Mhz clearance some years ago, there was a trade in
800 MHz filters particularly for Transmitters still using ch 59 or ch 60

We've since then had the 700 MHz clearance so the highest TV channel
still in use is Ch 48....

it seems according to eBay theere is still demand for Ch 59 AT800
filters...

https://www.ebay.co.uk/itm/394417469035?epid=13012049915&hash=item5bd51cf66b:g:DZcAAOSwgaVjv9xn

I can only assume that people are trying to use in-house modulators on
chs 61 to 68?

If you are really close to a 4G mast and your aerial more or less points
at the mast then if your TV signals are weakish you might conceivably
have problems across a large portion of the UHF band.

--
Brian Gregory (in England).

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

I'd imagine it depends how wide open the sets first RF stage is. Surely,
though you would imagine another filter might be needed as well now, unless powers are well down.
Brian

--

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Blind user, so no pictures please
Note this Signature is meaningless.!
"SH" <i.love@spam.com> wrote in message news:tt0hm2$fied$1@dont-email.me...

When we had the 800 Mhz clearance some years ago, there was a trade in 800 MHz filters particularly for Transmitters still using ch 59 or ch 60

We've since then had the 700 MHz clearance so the highest TV channel still
in use is Ch 48....

it seems according to eBay theere is still demand for Ch 59 AT800
filters...

https://www.ebay.co.uk/itm/394417469035?epid=13012049915&hash=item5bd51cf66b:g:DZcAAOSwgaVjv9xn

I can only assume that people are trying to use in-house modulators on chs
61 to 68?

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

I was wondering about these devices, Could they also give interference the other way, to celular? Of course if its all in a coax then fine, but maybe some people have devices that work a bit like the old video senders. I know
an asian family near here has one of those as you can hear its fm sound at
over 600Mhz sometimes, so its analogue, probably from a vhs player source.
Brian

--

--:
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...
briang1@blueyonder.co.uk
Blind user, so no pictures please
Note this Signature is meaningless.!
"Brian Gregory" <void-invalid-dead-dontuse@email.invalid> wrote in message news:k5ioc0FooveU2@mid.individual.net...

On 20/02/2023 19:29, SH wrote:

When we had the 800 Mhz clearance some years ago, there was a trade in
800 MHz filters particularly for Transmitters still using ch 59 or ch 60

We've since then had the 700 MHz clearance so the highest TV channel
still in use is Ch 48....

it seems according to eBay theere is still demand for Ch 59 AT800
filters...

https://www.ebay.co.uk/itm/394417469035?epid=13012049915&hash=item5bd51cf66b:g:DZcAAOSwgaVjv9xn

I can only assume that people are trying to use in-house modulators on
chs 61 to 68?

If you are really close to a 4G mast and your aerial more or less points
at the mast then if your TV signals are weakish you might conceivably have problems across a large portion of the UHF band.

--
Brian Gregory (in England).

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

In article <tt0hm2$fied$1@dont-email.me>, SH <i.love@spam.com> wrote:

When we had the 800 Mhz clearance some years ago, there was a trade in
800 MHz filters particularly for Transmitters still using ch 59 or ch 60

We've since then had the 700 MHz clearance so the highest TV channel
still in use is Ch 48....

it seems according to eBay theere is still demand for Ch 59 AT800
filters...

I'm still curious about the apparent absence of LPFs to reject the 700MHz+ stuff. Not noticed an problems (1), though, with our TV set or a computer 'dongle' receiver.

(1) Yet!

Jim

--
Please use the address on the audiomisc page if you wish to email me. Electronics https://www.st-andrews.ac.uk/~www_pa/Scots_Guide/intro/electron.htm
biog http://jcgl.orpheusweb.co.uk/history/ups_and_downs.html
Audio Misc http://www.audiomisc.co.uk/index.html

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On 04/04/2023 10:02, Jim Lesurf wrote:

In article <tt0hm2$fied$1@dont-email.me>, SH <i.love@spam.com> wrote:

When we had the 800 Mhz clearance some years ago, there was a trade in
800 MHz filters particularly for Transmitters still using ch 59 or ch 60
We've since then had the 700 MHz clearance so the highest TV channel
still in use is Ch 48....
it seems according to eBay theere is still demand for Ch 59 AT800
filters...

I'm still curious about the apparent absence of LPFs to reject the 700MHz+ stuff.

They're available, I have one fitted to the input of my masthead amp.
(fitted the day COM 7 closed :- )  )

<https://www.tlc-direct.co.uk/Products/MXF5GF.html?source=adwords&ad_position=&ad_id=&placement=&kw=&network=x&matchtype=&ad_type=pla&product_id=MXF5GF&product_partition_id=&campaign=shopping_excluded&version=finalurl_v3&gclid=Cj0KCQjwuLShBhC_
ARIsAFod4fLGMR12nz95CfHJjgIB9vZ1nD-TUhCeFQZaoapGaKhCaIVzN8UYDUEaAjW8EALw_wcB>

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On Tue, 21 Feb 2023 18:05:32 -0000
"Brian Gaff" <brian1gaff@gmail.com> wrote:

I was wondering about these devices, Could they also give
interference the other way, to celular? Of course if its all in a
coax then fine, but maybe some people have devices that work a bit
like the old video senders. I know an asian family near here has one
of those as you can hear its fm sound at over 600Mhz sometimes, so
its analogue, probably from a vhs player source. Brian

If it's Asian music, I could only take so much of that at one sitting.
Is there any legal obligation to not create such interference?
--
Davey.

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Jim Lesurf wrote:

I'm still curious about the apparent absence of LPFs to reject the 700MHz+ stuff. Not noticed an problems (1), though, with our TV set or a computer 'dongle' receiver.

(1) Yet!

Apparently ofcom declared it wouldn't be a problem!

<https://www.ispreview.co.uk/index.php/2017/05/ofcom-tv-interference-not-big-problem-mobile-broadband-700mhz.html>

ICBA to find the original on the ofcom website but from that diagram
they were expecting the up/down "halves" of the mobile bandwidth to be
reversed within 700MHz compared to 800MHz?

So the spectrum adjacent to the TV channels would be from the phone, not
from the base, and it looks like more than an 8MHz gap compared to a
1MHz gap?

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Wed 05/04/2023 11:06, Andy Burns wrote:

Jim Lesurf wrote:

I'm still curious about the apparent absence of LPFs to reject the
700MHz+
stuff. Not noticed an problems (1), though, with our TV set or a computer
'dongle' receiver.

(1) Yet!

Apparently ofcom declared it wouldn't be a problem!

<https://www.ispreview.co.uk/index.php/2017/05/ofcom-tv-interference-not-big-problem-mobile-broadband-700mhz.html>

ICBA to find the original on the ofcom website but from that diagram
they were expecting the up/down "halves" of the mobile bandwidth to be reversed within 700MHz compared to 800MHz?

So the spectrum adjacent to the TV channels would be from the phone, not
from the base, and it looks like more than an 8MHz gap compared to a
1MHz gap?

It may not be a problem as it looks as though much of 5G - at first at
least - will be in the 3.4GHz and 3.6-4GHz bands. Also remember that 5G
- even more than 4G - does its best to operate at the lowest possible
radiated power such that the weakest signal being received is only just
above the noise floor.

--- SoupGate-Win32 v1.05
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