Topband: Phasing lines

[David Olean]

Hi Clive,

i have used chunks of LDF cable for phasing lines and my impression is 
that on VHF, you could trim them by the book and be well close enough. 
My impression is that they are very consistent from piece to piece.  
That being said, I always tested my lengths after cutting a bit long and 
then trimmed them to the actual phase length. (It is more fun to play 
with the test equipment!)

73

Dave K1WHS

On 3/3/2020 3:39 PM, dj7ww at t-online.de wrote:
> I have used LDF4-50 and LDF 4-75 by RFS for phasing lines on HF bands.
> They did as expected with 88%, however on VHF/UHF I would measure how they
> behave.
>
> 73
> Peter
>
>
> -----Original Message-----
> From: Topband [mailto:topband-bounces+dj7ww=t-online.de at contesting.com] On
> Behalf Of clive at gm3poi.com
> Sent: Dienstag, 3. März 2020 16:30
> To: topband at contesting.com
> Subject: Topband: Phasing lines
>
> Hi all,
>
> I wonder whether anyone has used LDF4-50A for phasing lines and verified the
> VF as being 88%. If not have you an idea of any spread on the VF.
>
> I want to use some where it could make the difference to cable length.
> However nothing will be assumed it will be measured. I note from the spec
> that
>
> they give a tolerance of 5% but I doubt some how that the VF varies that
> much.  73 Clive GM3POI
>
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