[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

RE: Re: Arrow 14 el 70CM RHCP



So 3/4 wave of coax at 435 MHz would be about 25 1/2 inches, ((468 / 435) *
.66) wouldn't it? 

-----Original Message-----
From: John Wright [mailto:g4dmf@g4dmf.co.uk] 
Sent: Wednesday, August 27, 2003 4:52 AM
To: amsat-bb@amsat.org
Subject: [amsat-bb] Re: Arrow 14 el 70CM RHCP


At 15:04 26/08/2003 -0500, you wrote:
>This is very cool.  I never thought about making the matching cables 
>3/4
>wavelength long.  That puts the Tee further away from the radiating 
>elements.  It also makes it easy to measure the coax with the MFJ-259 SWR 
>analyzer (not a problem for me because I have the MFJ-269 that does UHF).


Making the cables 3/4 also allows the use of equipment that will only 
measure up to 2 mtrs.
3/4 on 70cm is 1/4 on 2 mtrs. just divide the frequency by 3, and make 1/4 
sections for that frequency.



G4DMF
All outgoing Email is checked with NAV 2003


----
Sent via amsat-bb@amsat.org. Opinions expressed are those of the author. Not
an AMSAT member? Join now to support the amateur satellite program! To
unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
----
Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org



AMSAT Top AMSAT Home