XPost: uk.radio.amateur   
   From: Rambo@thisaintreal.org   
      
   On Sat, 19 Aug 2017 15:35:41 +0100, "Jimbo"   
    wrote:   
      
   >   
   >"Ian Jackson"  wrote in message   
   >news:1M0ZGuBgmCmZFwJs@brattleho.plus.com...   
   >> 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?   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)