Re: LF: Testing LF losses in materials

["Walter Blanchard" <blanch@pncl.co.uk>]

At 15:03 23/01/01 Tuesday, Mike G3XDV wrote:


> ............................. I am back to using black plastic sticky tape (a
> reel of this stays cold in the microwave oven - though the cardboard
> former gets warm).

I used to use plastic sticky tape (any colour) to insulate between inner 
and outer of  RG-213 coax cable where I'd joined it  (typical amateur using 
odd lengths!) . Then I found I was losing 1-2 dB at each joint at 70 cms so 
abandoned it  and used foamed polyethylene instead which is fine. Don't 
know if there are different types of plastic tape with different RF properties.
Walter G3JKV.