Re: aerial id please

Michael O'Beirne

Hi Chris

I may be able to help.

I Googled Niphan sockets and they seem to resemble old fashioned bright metal power sockets found on caravans and trailers. I may have the wrong Niphan!

Inside the D11 wagons, the antenna connections from the transmitter to the dummy load and VSWR meter were the coarse thread Plessey type coaxial connectors. The external socket(s) on the side of the vehicle for connecting the coax for a dipole was the standard Burndept type. The dipole centre piece was also a Burndept.

The antenna wire was normal R4 copper.

Marconi provided TX and RX baluns for a 75 coax to 600ohm open wire feeder using R4 for use with Vs and rhombics for long haul links but we had no use for them. Besides, the huge real estate needed for a rhombic was strictly for a home station or specialist units with lots of infantry for protection.

I have in storage a TX balun - a massive thing the size and shape of a chamber pot with two long feed through insulator "horns" for the open feeder. I cannot recall the coax socket but it was bigger than a Burndept.


-----Original Message-----
From: Chris_Suslowicz
Sent: Monday, November 11, 2019 12:09 AM
Subject: Re: [wireless-set-no19] aerial id please

Ian Cooper wrote:

Thanks Chris. The antenna was in with a load of Larkspur era equipment and though I thought it may belong to the era, I couldn't relate it to any sets that I have.
I don't think it was used with the D11 or D13, but could be wrong - they were using the Burndept sockets rather than Niphan (or Pattern 104 fine thread for some of the aerial connections - set to ATU, etc.), and Niphans are just Too Bloody Heavy. The "Wire, Electric, R4" was still used though, probably with the specialised transformers and terminating resistors for making up rhombic and sloping vee aerials, not sure about dipoles.

People who actually used the kit in anger will be able to fill in the details. (Waves at G8MOB and others.) :-)>

Best regards,
Chris. (G8KGS)
Junior Password Gnome.

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