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gvisser Post subject: looking for rare high-Z low-capacitance coax
Posted: Wed Oct 14, 2009 4:58 pm Lieutenant Joined: Wed
Oct 14, 2009 4:49 pm Posts: 3 For a physics research application
at Indiana University (Bloomington, Indiana), I am in urgent need of
a short length (5 feet is enough) of low capacitance coaxial cable.
The ideal type would be RG-114 (M17/47) which is 6.5 pF/foot, Z0=185
Ohm, air/polyethylene. However, anything <= 12.5 pF/foot would
be very useful. Does anyone have a line on where I can purchase (new
or surplus) or otherwise get something like this? Please respond if
you do... Thanks! Top flyingbrit Post subject:
Re: looking for rare high-Z low-capacitance coaxPosted: Mon Oct 26,
2009 3:37 pm Lieutenant Joined: Mon Oct 26, 2009 3:32
pm Posts: 1 The typical car radio replacement whip antenna will
have about 6 feet of RG-62A. At 93 ohms and 13.6 pF/ft it is not quite
what you want but is easily available at your local NAPA store.
Top gvisser Post subject: Re: looking for rare high-Z
low-capacitance coaxPosted: Tue Oct 27, 2009 10:04 am Lieutenant
Joined: Wed Oct 14, 2009 4:49 pm Posts: 3 Thanks - yes this
is true and I'm aware of RG-62(A) and we have some of that around the
lab. Really what I mean is that I'm seeking something better (lower
capacitance) than RG-62. I have no idea if RG-114 ever was really made?
But if there is any lead where to get something like that, or other
special low-capacitance cable, I'd still like to hear about it. [I am
also aware of a 125 Ohm foam polyethylene cable - 9.5 pF/ft - made (supposedly)
by CommScope, but have had zero success in trying to get some of it.
I suspect although they have a datasheet on the web, they don't really
make it?] Top yendori Post subject: Re: looking
for rare high-Z low-capacitance coaxPosted: Wed Oct 28, 2009 5:46 am
General Joined: Thu Sep 25, 2003 1:19 am Posts:
50 Location: texarcana Have you tried here? https://www.awcwire.com/ProductSpec.aspx?id=RG114-Coaxial-Cable
Rod Top gvisser Post subject: Re: looking
for rare high-Z low-capacitance coaxPosted: Fri Oct 30, 2009 4:49 pm
Lieutenant Joined: Wed Oct 14, 2009 4:49 pm Posts:
3 Hello Rod, Thanks for the lead! I had not found that one. Indeed
they do have the stuff in stock, now it is only a matter of the minimum
order $$ but that is for now my project manager to worry about.
In case anyone out there has a short length (5 feet is really enough)
I'd certainly appreciate to hear from you. But I'm glad to have found
a vendor that we can get it from. Thanks again!
Posted 11/12/2012
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