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Old August 19th 17, 04:53 PM posted to uk.radio.amateur,rec.radio.amateur.dx
Jimbo Jimbo is offline
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First recorded activity by RadioBanter: Aug 2017
Posts: 10
Default [S&DWS] Foundation Course Material in PDF Format


"Rambo" wrote in message
...
On Sat, 19 Aug 2017 15:35:41 +0100, "Jimbo"
wrote:


"Ian Jackson" wrote in message
...
In message , Gareth's Downstairs Computer
writes
On 19/08/2017 10:34, Jimbo wrote:
sexes).
when I was newly licensed and poor I used 75 ohm TV coax and
belling
lee
connectors on HF and got away with it .......


And it was standard on 145MHz. (QQV03-10 anyone?)

Actually, the original B&L connector is a pretty good 75 ohm match up to
1GHz and more. If I remember correctly, many 50 ohm BNCs are not so hot
500MHz. With 75 ohms, the problem is maintaining the structural return
loss constant while having enough PTFE insulation to hold the pin in
place. Some are only really good to around 200Mhz. Of course, for most
purposes, both are usable to much higher frequencies.

And mixable!



I got a load of weird connectors and adaptors from a guy that worked at
the
sub base at New London in 1979 ...still using them ......

Type 43 connector?


no idea ... oh was that a submarine joke? ....