RCA phono jacks on Heath gear

AL DOLGOSH al.dolgosh at HAMRADIO.ORG
Sat Oct 31 17:01:00 EST 1998


The impedance of a coaxial line is a resultant of the ID to OD ratio and the
spacing.  The RCA connector is hardly a coaxial connector.

Will it cause an impedance bump? Yes!

Will it matter on anything below UHF? No!

The moral of the story - don't worry about it.

Al - K8EUR

-> Message-ID:  <003b01be050f$7da890c0$074afdd0 at default>
-> Date:         Sat, 31 Oct 1998 12:46:09 -0800
-> From: Jim Berry <basalop at gte.net>
-> Subject:      Re: RCA phono jacks on Heath gear
->
-> Hello Group,
->
-> Bob Miller said:
->
-> > interconnects  are 50
-> > ohms and not a good match for F systems.
->
-> Help me on this one folks.  Is the impedance of a connector determined by
-> the pin diameter or the spacing between the pin and the connector outer
-> body?
->
-> Is there really that much difference between 50 ohm and 70 ohm?
-> Does anyone know what the impedance of a RCA phono plug really is?  Does it
-> really matter?
->
-> I have been using and making up all kinds of jumpers using type F connectors
-> and RG-6 (70 ohm coax).  What if I was to use F connectors and 50 ohm RG-58?
-> That is if it can even be used with F connectors.
->
-> 73 Jim K7SLI (Getting ready for all the gremlims and goblins to arrive)
-> While I am at it, anyone got a manual for a Heath IM-13 VTVM?
->

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