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Re: [time-nuts] Cables dor 10 mHz

MS
Mark Spencer
Mon, Jul 30, 2012 8:03 PM

Yep..  I'm slowly replacing my no name rg 58 jumpers with double shieled rg 400.  I also have some 1/4 inch "heliax" cable that also works well.

I found that terminting all of the un used outputs with 50 ohm terminators  also helps keep the noise down.


On Mon, 30 Jul, 2012 3:31 PM EDT Chuck Forsberg WA7KGX N2469R wrote:

I am driving a Flexradio 1500, Racal-Dana 1992 counter,
Advantest U3641 spectrum analyzer, and my new
HP 3586B+ selective  level meter with the 10 mHz from
my Thunderbolt.  I had been using some old Ethernet cables
to drive this lot until last weekend.

I noticed that WWV on 10 mHz was being swamped by
leakage from these old cheap cables.  This weekend I
replaced the lot with fat instrumentation grade cables.
This appears to have prevented the Thunderbolt's 10 mHz
from messing with Boulder's signal.

-- Chuck Forsberg WA7KGX N2469R    caf@omen.com  www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
Omen Technology Inc      "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231  503-614-0430


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Yep.. I'm slowly replacing my no name rg 58 jumpers with double shieled rg 400. I also have some 1/4 inch "heliax" cable that also works well. I found that terminting all of the un used outputs with 50 ohm terminators also helps keep the noise down. ------------------------------ On Mon, 30 Jul, 2012 3:31 PM EDT Chuck Forsberg WA7KGX N2469R wrote: >I am driving a Flexradio 1500, Racal-Dana 1992 counter, >Advantest U3641 spectrum analyzer, and my new >HP 3586B+ selective level meter with the 10 mHz from >my Thunderbolt. I had been using some old Ethernet cables >to drive this lot until last weekend. > >I noticed that WWV on 10 mHz was being swamped by >leakage from these old cheap cables. This weekend I >replaced the lot with fat instrumentation grade cables. >This appears to have prevented the Thunderbolt's 10 mHz >from messing with Boulder's signal. > >-- Chuck Forsberg WA7KGX N2469R caf@omen.com www.omen.com >Developer of Industrial ZMODEM(Tm) for Embedded Applications > Omen Technology Inc "The High Reliability Software" >10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 > > >_______________________________________________ >time-nuts mailing list -- time-nuts@febo.com >To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >and follow the instructions there.