[Moon-Net] 2M antenna matching Data

Paul Andrews paulmandrews1 at gmail.com
Tue Nov 8 20:51:34 CET 2016


Buy a long pipe.  :)

On Tue, Nov 8, 2016 at 1:38 PM, serge <ve1kg at eastlink.ca> wrote:

> Conrad I reflected on your helpful email. What happens if you need a coax
> length of 41/2 M????????
> Serge VE1KG
>
> ----- Original Message -----
> *From:* Conrad PA5Y <g0ruz at g0ruz.com>
> *To:* Ray Rector <wa4njp at bellsouth.net> ; serge <ve1kg at eastlink.ca> ; Steve
> Bell <eagle572 at comcast.net> ; moon-net at mailman.pe1itr.com
> *Sent:* Tuesday, November 08, 2016 5:56 PM
> *Subject:* Re: [Moon-Net] 2M antenna matching Data
>
> Here is a tip for cutting phasing lines with adequate accuracy for 2m.
>
> Presumably we all have a long piece of metal tubing.
>
> In my case I wanted lines of 4m long so I put the N type on one end of the
> cable and slid a washer over the cable so that the connector could not go
> into the 4m long piece of tubing that I had. Put the coax into the tubing,
> pull the cable tight so that the connector is right up against the washer
> and the washer is up against the end of the tube. With the cable under
> tension cut the cable at the opposite end of the cable. Be careful that you
> fit the connectors using the same dimensions after you have cut and you
> will be within a few degrees at 2m. I did 8 cables this way and the total
> spread measured on an R&S VNA was 2.6 degrees.
>
> More than good enough.
>
> Regards
> Conrad PA5Y
>
> On 8 November 2016 01:42:53 CET, Ray Rector <wa4njp at bellsouth.net> wrote:
>
>> Well said Serge, same roll close together make them the same length and
>> put it on the air... Yes there will be some difference, but you or I and
>> the people you are working will not know the difference,  Spend all day,
>> make them with in 0.00001 wavelength of the same, and you will not realize
>> the difference, you nor I have the ability to see of check any difference..
>> We all would like it to be perfect, we can get very close with a tape
>> measure, on 144 or below you probably will never see the difference..
>> Ray
>>
>> ------------------------------
>> *From:* serge <ve1kg at eastlink.ca>
>> *To:* Steve Bell <eagle572 at comcast.net>; moon-net at mailman.pe1itr.com
>> *Sent:* Monday, November 7, 2016 5:09 PM
>> *Subject:* Re: [Moon-Net] 2M antenna matching Data
>>
>> GE Steve
>> Just cut 2 equal lengths of coax from the same roll of coax if possible
>> then
>> you are done.
>> Serge VE1KG
>> ----- Original Message -----
>> From: "Steve Bell" <eagle572 at comcast.net>
>> To: <moon-net at mailman.pe1itr.com>
>> Sent: Monday, November 07, 2016 8:18 PM
>> Subject: Re: [Moon-Net] 2M antenna matching Data
>>
>>
>> > Curt,
>> >
>> > I have the same question---I have a 13 El 2m Yagi per K1FO design and
>> > wish to build a second one, with added phasing harness to improve my EME
>> > capability.
>> >
>> > It looks like the different phase angles which you measured may cause
>> > trouble with the total array gain and also affect the antenna pattern.
>> >
>> > Please keep this topic on Moon-net for others to ponder.
>> >
>> > Steve Bell KJ7OG
>> > _______________________________________________
>> > Moon-Net posting and subscription instructions are at
>> > http://www.nlsa.com/nets/moon-net-help.html
>> >
>>
>> _______________________________________________
>> Moon-Net posting and subscription instructions are at
>> http://www.nlsa.com/nets/moon-net-help.html
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>>
>>
>> ------------------------------
>>
>> Moon-Net posting and subscription instructions are at http://www.nlsa.com/nets/moon-net-help.html
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>>
> _______________________________________________
> Moon-Net posting and subscription instructions are at
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>
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