phono for rf

[WB2TBB]

But what frequency? I don't think I am too concerned about impedance bumps
at hf frequencys. At least those caused by using UHF connectors.
...Dave
-----Original Message-----
From: Cross, Alan (HOU) <Alan.Cross at COMPAQ.COM>
To: HEATH at LISTSERV.TEMPE.GOV <HEATH at LISTSERV.TEMPE.GOV>
Date: Tuesday, April 27, 1999 11:39 AM
Subject: Re: phono for rf


>Thank you !
>
>Having experience working with moving high speed, complex data just above
>the noise level on extremely long transmission lines --- having any
>"impedence bump" in the line was a real nightmare ---- used to wrangle with
>engineering staff when all the care we took was undone because of using the
>wrong connector at the termination end.........  besides - the RCA jacks
are
>cool - no other hams use them :-)
>
>alan, wa5uzb
>
>
>-----Original Message-----
>From: Multi-Volti Devices [mailto:multi-volti at SOFTHOUSE.COM]
>Sent: Monday, April 26, 1999 11:39 PM
>To: HEATH at LISTSERV.TEMPE.GOV
>Subject: phono for rf
>
>
>This topic has probably been discussed before, but I was told by the late
>RCA engineer who got me interested in engineering that the RCA/phono jack
is
>a constant impedance 50 ohm connector (or perhaps close to 50, don't
>remember his exact words, and at least for hf), and that is why Collins
used
>it on hf gear and type N connectors for higher freqs. Can't remember if he
>called it a balanced connector, but he did call UHF connectors unbalanced.
>Not sure if that's because one conductor is grounded, because N and BNC
>would be unbalanced by same logic...guess that's why you use open wire
>feeders and feedthrus...
>
>Murray
>
>UHF (PL-259, SO-239), are unbalanced and
>
>--- --- --- --- --- --- --- --- --- --- --- --- --- --
>To subscribe: listserv at listserv.tempe.gov
>and in body: subscribe HEATH yourfirstname yourlastname
>To unsubscribe:  listserv at listserv.tempe.gov
>and in body: signoff HEATH
>Archives for HEATH: http://www.tempe.gov/archives
>--- --- --- --- --- --- --- --- --- --- --- --- --- --
>
>--- --- --- --- --- --- --- --- --- --- --- --- --- --
>To subscribe: listserv at listserv.tempe.gov
>and in body: subscribe HEATH yourfirstname yourlastname
>To unsubscribe:  listserv at listserv.tempe.gov
>and in body: signoff HEATH
>Archives for HEATH: http://www.tempe.gov/archives
>--- --- --- --- --- --- --- --- --- --- --- --- --- --
>

--- --- --- --- --- --- --- --- --- --- --- --- --- --
To subscribe: listserv at listserv.tempe.gov
and in body: subscribe HEATH yourfirstname yourlastname
To unsubscribe:  listserv at listserv.tempe.gov
and in body: signoff HEATH
Archives for HEATH: http://www.tempe.gov/archives
--- --- --- --- --- --- --- --- --- --- --- --- --- --