Very odd old Band I aerial

[Graham G3ZVT]

How did the feed arrangements work here?

http://www.rhiw.com/hanes_02/rhiw_fi.../aerial_03.jpg

Has it even been assembled correctly?


Here is the parent article.

http://www.rhiw.com/hanes_02/rhiw_first_tv/rhiw.htm

[AdrianH]

It looks like some form of splitter harness with the co-ax going to the middle of the driven elements through the end of the driven element tube a bit like an rf choke. If it works is anyone's guess.

Adrian

[Andy Green]

It probably would work, it may affect the symmetry of the antenna, you sometimes see a similar feed arrangement with MF verticals Like the old BBC MF Franklin at Daventry are fed Up the inside and terminated at a height.

[peter_scott]

Great story. Thanks for posting.

Peter

[Panrock]

Probably the two dipoles were simply connected in parallel, and with the effect of the director elements the match can't have been very good.

Steve

[Nuvistor]

Originally Posted by Panrock

Probably the two dipoles were simply connected in parallel, and with the effect of the director elements the match can't have been very good.

Steve

It was probably a matching harness for the two dipoles, can’t remember how to work the lengths out now. Can’t see from the photo but presume the dipoles had insulators like any other Yagi.

If the story is correct it must have been reasonable to receive Holme Moss albeit noisy.

[Refugee]

I have seen two 625 TV aerials connected in parallel in the past.

[Nuvistor]

Photo of a stacked UHF Array in post 11, I remember helping install that one.
https://www.vintage-radio.net/forum/...d.php?p=862271

[Refugee]

That is double the two I can remember.
The location now has satellite TV
https://www.google.com/maps/@51.6156.../data=!3m1!1e3

[peter_scott]

By the end of 1938 TV&SWW published a map showing locations of good reception beyond the normal AP service area.

Peter

[Mr Hoover]

Originally Posted by peter_scott

By the end of 1938 TV&SWW published a map showing locations of good reception beyond the normal AP service area.

Peter

There's a BBC report from 1948 measuring AP signal strengths in the outer reaches of the service area.
https://www.bbc.co.uk/rd/publications/rdreport_1948_02

[Mr Hoover]

Also there's another report from 1950 monitoring signal strengths at Greatstone on Sea in South East Kent(nr Lydd and Dungeness).
AP Ch1, Sutton Coldfield Ch4 and Eiffel Tower 46 MHz vision, 42 MHz sound(441 line transmissions) were observed.
https://www.bbc.co.uk/rd/publications/rdreport_1950_25

[dtvmcdonald]

I'd still love to have somebody figure out if in fact
those lines coming out the driven elements' ends are feedlines.

I've tried and failed to find out a way to make it work.

[Refugee]

Judging by the telephone pole in the background there is something very odd about the orientation of the array.

[Mr Hoover]

There's a BBC report showing the Holme Moss
service area here.
https://www.bbc.co.uk/rd/publications/rdreport_1954_02
Once Divis started up from Northern Ireland he'd
have probably received a better signal from there.

[Graham G3ZVT]

Originally Posted by Refugee

Judging by the telephone pole in the background there is something very odd about the orientation of the array.

It looks OK from this angle



Sorry I couldn't resist. The pictures in the second link of my OP put things in perspective.

[peter_scott]

Originally Posted by Mr Hoover

Also there's another report from 1950 monitoring signal strengths at Greatstone on Sea in South East Kent(nr Lydd and Dungeness).
AP Ch1, Sutton Coldfield Ch4 and Eiffel Tower 46 MHz vision, 42 MHz sound(441 line transmissions) were observed.
https://www.bbc.co.uk/rd/publications/rdreport_1950_25

I had seen the earlier field strength report before but hadn't spotted the 1950 one. Very interesting! Thanks for posting.

Peter