Re: What has happened?
#nanovna-v2
I have tried 3 different calibration sets, they all get the same result. Measuring at DC is ok. My NanoVNA is a SAA-2N, this is a device with N-connectors, so I don't think they have don their job...
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Karl Jan Skontorp
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#24817
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Re: Stripping Coax
It would depend on what coax you are working with. Lately I've been using RG316, quite by accident I discovered that I can neatly remove the outer jacket with my Ideal strippers by using the 14AWG
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John
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#24816
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Re: Stripping Coax
It depends what you mean by pro. While I was working for a cable provider the service men used cheap tools like these: https://s.click.aliexpress.com/e/_AmaRuK https://s.click.aliexpress.com/e/_9QEcIK
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Dragan Milivojevic
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#24815
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Re: Stripping Coax
That's why I eventually got the fancy adjustable one.? I had a single
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Jim Lux
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#24814
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Re: Stripping Coax
For instance, this is still a work in progress, but, for RG-8x: BNC Connectors from HRO: Lands Precision BNC-10Z-DGN https://www.hamradio.com/detail.cfm?pid=H0-009969 N-type for RG-8x:
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William Smith <w_smith@...>
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#24813
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Re: Stripping Coax
I tried to find some catalog info, but you need to dig through distributors pages.. There's different flavors of these things. 2 and 3 level stripping, adjustable or not, whether are not you handle
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Jim Lux
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#24812
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Re: What has happened?
#nanovna-v2
Check your cal loads with an ohm meter to see if they are OK at DC. Take a look at the inside socket of the SMA connectors. Perhaps "drilled out" by rotating pin after too may uses. Roger
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Roger Need
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#24811
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Re: PC Boards for QEX Step Attenuator Available
Dick, Does the article indicate how much "blow-by" you get (due to the mechanical switches in this design) as the frequency increases? Roger
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Roger Need
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#24810
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Re: Stripping Coax
One of those multiblade spin around the coax I've used a Paladin CST for decades.
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Jim Lux
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#24809
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Stripping Coax
I have a ratchet crimp connector and can install various types of terminations. But what tool(s) do the pros use to strip coax? Any suggestions?
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Albert Pion
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#24808
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PC Boards for QEX Step Attenuator Available
I have ordered a limited batch of boards from JLCPCB for the QEX September/October 2021 ¡°Miniature SMA Step Attenuator¡± pp 9-21 by Tom Alldred VA7TA. If you are interested in a board, at $3.00 ppd
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dick faust
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#24807
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Re: What has happened?
#nanovna-v2
On 21/09/2021 13:45, Karl Jan Skontorp wrote: > Hi all! > Is there anyone who can be so kind as to give me some help to make my device work again or at least tell me what has happened to my device? >
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David J Taylor
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#24806
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Re: Sweeping an Antenna from the Shack
Good point. But, people should keep in mind that PL259 and N style connectors are two different animals. The outer shell of a PL259 is part of the Rf connection, but the outer shell of an N connector
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Joe
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#24805
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What has happened?
#nanovna-v2
Hi all! Is there anyone who can be so kind as to give me some help to make my device work again or at least tell me what has happened to my device? I have a NanoVNA V2_2 - SAA-2N with the DiSlord
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Karl Jan Skontorp
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#24804
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Re: Sweeping an Antenna from the Shack
One thing I have found is when tightening the pl259 you have to make sure the nubs are well seated in the so239 no air gaps. Unfortunately it is easy to just screw the connection together and not
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K8HTB
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#24803
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Re: examples of effect of feedline loss on apparent VSWR
Even more interesting is to do a wide/multt-band sweep with the nanoVNA: You can easily see the effects of frequency on feedline losses in the loss. I usually do a 1-30MHz sweep of my multiiband-HF
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Mat Breton
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#24802
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Re: Sweeping an Antenna from the Shack
Better, the pdf didn't include the figures... -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but
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Roy J. Tellason, Sr.
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#24801
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Re: Sweeping an Antenna from the Shack
Howdy Albert, You can get SMA connectors for RG-8X (and -59, any .242" coax), tho you do of course need the ratchet crimper with the appropriate dies.. I got both on amazon a while back. PL-259s are
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KV5R <kv5r@...>
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#24800
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Re: Sweeping an Antenna from the Shack
Since the antenna is SMA, would it make sense to put BNC connectors on the RG-8x and use a BNC->SMA adapter? Then not only do you avoid the PL-259 entirely, but you can easily calibrate at the SMA. If
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William Smith <w_smith@...>
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#24799
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Re: Sweeping an Antenna from the Shack
If you calibrate at the end of the cable, there should be no difference in either case. But I would choose option 1 because the attenuation of 18 feet of LMR-100 at 145MHz is only 1.62 dB and the
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btomek@...
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#24798
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