Sma adapters?

has anyone done a permanent install of a usrp1 or usrp2 with heavy duty
feed line? pictures?? how to secure everything? my coax is just lmmr400
with a N Male, i need either a jumper cable or adapter. which has method
works best? suggested vendors? thanks

On Aug 19, 2010, at 5:15 AM, dave k wrote:

has anyone done a permanent install of a usrp1 or usrp2 with heavy duty feed line? pictures?? how to secure everything? my coax is just lmmr400 with a N Male, i need either a jumper cable or adapter. which has method works best? suggested vendors? thanks

A short jumper cable between the thick LMR400 cable and the USRP might
be a good idea for strain relief. You can order all of the required
adapters and cables from a distributor like Digi-Key, or a cable/adapter
vendor like Pasternack. Pasternack will also make custom cables in
single quantity.


Mark J. Blair, NF6X [email protected]
Web page: http://www.nf6x.net/
GnuPG public key available from my web page.

On Aug 19, 2010, at 5:15 AM, dave k wrote:

has anyone done a permanent install of a usrp1 or usrp2 with heavy duty feed line? pictures?? how to secure everything? my coax is just lmmr400 with a N Male, i need either a jumper cable or adapter. which has method works best? suggested vendors? thanks

A short jumper cable between the thick LMR400 cable and the USRP might be a good idea for strain relief. You can order all of the required adapters and cables from a distributor like Digi-Key, or a cable/adapter vendor like Pasternack. Pasternack will also make custom cables in single quantity.

I’ll add Jameco and Mouser to the list of vendors who sell RF
adaptors/cables, etc.

When I’ve had to do this, I’ve put an ‘N’ to SMA on the fat cable, and
used a short piece of thin flexible cable with SMAs on it.
Jameco stocks cables with SMAs with both RG58 and RG-174. The RG174
is thin, but lossy, so you don’t want to use too much of
it, depending on your operating frequency.


Marcus L.
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org

On Aug 19, 2010, at 11:10 AM, Marcus D. Leech wrote:

When I’ve had to do this, I’ve put an ‘N’ to SMA on the fat cable, and
used a short piece of thin flexible cable with SMAs on it.

That’s exactly what I did in my semi-permanent GPS-disciplined
oscillator installation. I also do the same thing when I connect my
outdoor discone antenna to my USRP. Both of them have thick feedlines
(similar to RG8, LMR400, etc.) terminated with male N connectors, and
that’s a lot of mass and leverage to hang off a little SMA connector.


Mark J. Blair, NF6X [email protected]
Web page: http://www.nf6x.net/
GnuPG public key available from my web page.

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