405-Line VHF Aerials 2013 to the present day.

[peter_scott]

Spare EF50 valves for it can be obtained from the Radar Room...

I never doubted it for an instant!

Peter

[Heatercathodeshort]

What's that strange aerial for?
No idea but there was one on the old ship so we thought we should put one on the new one..J.

[Nuvistor]

May as well have a guess.
Perhaps an aerial for use by the aircraft when landing, or even finding the ship when returning.

I am sure others will have much better suggestion.

Frank

[peter_scott]

"This is a variant of Elbit's NATACS Communications Intelligence (COMINT) / Direction Finding (DF) systems. The NATACS System is capable of coping with advanced agile frequency communication radios. This fully integrated system - equipped with ultra-fast, Wide Band Receivers and Direction Finding (DF) Systems has outstanding scanning rates enabling the handling of extremely dense electromagnetic environments in the HF/VHF/UHF/HUHF frequency bands thanks to its Active or Passive receiving antennas connected through RF distribution units, characterized by frequency hopping, burst, and other agile transmissions. Among its main features is the Automatic Direction Finding and "FIX" signal classification and identification capability, focus on signals of interest by activating various filters and criteria (azimuth sector, signal type, etc.), monitor signals of interest (content & traffic), high-level analysis of suspected signals and signals of interest and high-capacity Digital Audio & IF Wideband Recording. In their regular load, the boats do not carry this antenna."

[peter_scott]

This one is a cheat from 1969. I doubt if the aerial is still there.

[G6Tanuki]

Google "Street View" can be useful spotting aerials: I was looking round Shipston on Stour's streetview entries when I noticed this "Antex" still above one of the buildings in the High Street.

Pointing at Sutton Coldfield/Lichfield of course.

[KeithsTV]

My grandmother lived in a village near to Shipston on Stour. I don't remember much about her TV or the aerial apart from there were two downleads and a diplexer near the TV with a single cable to the TV. Was this a common arrangement or was the diplexer fitted at the top of the mast?

Keith

[Heatercathodeshort]

I don't think I have posted this one before. Dorking High Street, Surrey.
Lined up with Crystal Palace and Beulah Hill the 'wrong' side of Box Hill channels 1 & 9.

I find it quite amazing how this aerials survive with just a length of what is basically wire strapping them to the stack. John.

[1955APREN]

Both types were used the belling & lee type was bronce coloured one fitted to
the window ceil with two wood sreews a band i & band 3 inputs one lead to the tv.Also used a lot was a antiferenc outside water proof type in a metal box oftern mounted on the bottom of the aerial mast with short leads from both aerials and one down lead . As the metal work on the outside one was connected to the outer
of ths coax , one of my work mates insisted that this should be mounted on the brick work with rawlpugs and screews , claiming that if mounted on the mast half the dipole on the band 3 aerial was s/c. in practise I do not remember any lost of signal either way. Also remember that some tv had two aerial in puts so a diplexer was not required.
Regards Derrick

[Heatercathodeshort]

The diplexer was often fitted at the back of the receiver when the customer's original installation had been for the Band 1 transmission only. When the ITA was added an additional aerial was required particularly in weak signal areas and this was often brought down on a separate down lead and combined.

This picture shows the old school house at Warnham village. The Band 1 section has unfortunately lost a few teeth. Channels 1 & 9. The UHF aerial is looking at our 'local' Midhurst. John.

[Peter.N.]

Some of the earlier TVs had separate aerial inputs for band 1/111 which were fine in our area but we had problems with the single input sets when the new Crystal Palace transmitter opened, the BBC signal was probably 100 times stronger than ITV as the Channel 9 transmitter was in Croydon but we were virtually looking at Crystal Palace.

It needed a bit of ingenuity to sort that out.

Peter

[Graham G3ZVT]

Originally Posted by KeithsTV

My grandmother lived in a village near to Shipston on Stour. I don't remember much about her TV or the aerial apart from there were two downleads and a diplexer near the TV with a single cable to the TV. Was this a common arrangement or was the diplexer fitted at the top of the mast?

My Grandmother lived in Manchester and had a vertical Band I dipole for Holme Moss on the back wall of their house and a vertical Yagi on the roof for Ch9 and the two downleads were combined in a diplexer screwed to the skirting board.
It was a Belling-Lee unit, dark gold I think. As a teenager I removed it and experimented with it, It came as a surprised that screwing the brass cores into the former increased the resonant frequency, and I always think of that diplexer whenever I encounter a brass core.

Graham.
G3ZVT

[Graham G3ZVT]

As this old thread has been bumped, perhaps I should post these pictures of old aerials I took in Scotland.
https://www.***********/gp/g3zvt/61825D

Graham.
G3ZVT

[beery]

Hi Graham,

I'm used to the 'H' and 'X' types, but some of those are distinctly ewe shaped

I've added a couple more that I recently spotted in Ware. The second one is a bit of a surprise as in the the scheme of things the house is not all that old.

Cheers
Andy

[Heatercathodeshort]

The house looks modern to us but probably dates from around 1961. Great pics!

I have seen a 'fishtail' Band 3 aerial in Godalming. It's in great condition as was the one that has recently vanished from a house on the A320 Woking road at Slyfield.

I will do my very best to take a picture of it even if it means blocking the road with a concrete mixer...It's situated at a diabolical bottleneck. I believe they were manufactured by 'K' Aerials of Guildford. John.

[Graham G3ZVT]

Originally Posted by AidanLunn

Loads found around London on a recent trip through there to Hastings

1) Lewisham
2) Southwark
3) Newington
4) Fortune Green/Child's Hill
5) Golder's Green

I just want to get a GEC BT302 in one of those properties and get this on it:

http://www.youtube.com/watch?v=VeUyOVk_wI4

and pretend it's 1964!

Go for it!
Family tradition has it that the original showing of "The Quatermass Experiment" hastened my birth!
So look what will be playing on my Cossor 916 on my birthday next month?

https://youtu.be/Q9b7_x0g0uM?t=197

Strictly speaking the set should be an HMV1802

Graham.
G3ZVT

[Peter.N.]

I remember that - gruesome.

Peter

[SteveCG]

Re, post no 468:

I think (but am not 100% certain) the double 5, Band III aerial is a Labgear jobbie.

[G6Tanuki]

Originally Posted by KeithsTV

My grandmother lived in a village near to Shipston on Stour. I don't remember much about her TV or the aerial apart from there were two downleads and a diplexer near the TV with a single cable to the TV. Was this a common arrangement or was the diplexer fitted at the top of the mast?

In the case of the "Antex" from memory there was no diplexer needed: the 'X' was connected to the Yagi's active element by a short length of 300-Ohm flat feeder and then there was only one coax down to the TV.

In plenty of other cases I can remember, the BI and BIII active-elements were similarly paralleled at the antenna, or they did the nasty-but-surprisingly-effective technique of using the same active-element as a 1/2-wave dipole for BI and a 3/2-wave one for BIII. This worked better when your BI station was at the top end of the band and the BIII was at the bottom end so giving a reasonable approximation to a 3:1 ratio - I dread to think of the mismatch between a 45MHz and 210MHz pairing!

[Nuvistor]

The Antex was supplied as a combined band 1 band 3 aerial or as a band 1 only aerial.
One down lead for the combined, a diplexer required if a band 3 aerial was also required, which was usual.

We fitted the combined in good signal areas and seperate when in poor areas, usually to try and reduce ghosts. The diplexer was normally fitted on the mast but I have seen them fitted inside with two downleads especially if the two aerials were located in different places to get get the best reception.

Frank