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Joe,

Another good way to learn about the NanoVNA is to read old posts in this group. Many typical questions have already been answered. For example this post which deals with your question.

/g/nanovna-users/topic/73210908#12819

Roger

On Tue, Sep 21, 2021 at 04:03 PM, Joe WB9SBD wrote:

is it still calibrated?

How about really narrow like 7050 to 7060 Khz

still calibrated?

Joe WB9SBD

Joe,

The best way to learn about your NanoVNA is to "learn by doing". Calibrate your unit for 3 to 30 MHz. and make a measurement of a narrow band like 40M by zooming in. Then calibrate for just the 40m band and make a measurement. Then compare the two and see how different they are. This is a great way to become proficient with the NanoVNA.

Roger

Thanks, I was thinking of something like that.

Joe WB9SBD

Always calibrated however, unit does interpolation. Therefore, if you desire best accuracy over a given range, then cal over THAT range.

Ok,
say I set up Stimulus for 3 to 30 Mhz.

And then do a calibrate

Open
Short
load.

Now it is supposedly calibrated for anywhere between 3 and 30 Mhz correct?

Now I look at the who range and decide to zoom in on say 7 to 7.3

Start 7 Mhz
stop 7.3 Mhz

is it still calibrated?

How about really narrow like 7050 to 7060 Khz

still calibrated?

Joe WB9SBD

OK, that's adjustable for different jacket/braid/dielectric/center diameters, do you have to swap the cartridge for different strip lengths?

73, Willie N1JBJ

On 9/21/21 1:20 PM, William Smith wrote:

Hey Jim,

Do you have a pointer to the fancy adjustable one? I've been having a hard time finding anything other than 2 and 3 blade non-adjustable ones

73, Willie N1JBJ

Paladin CST Pro

looks like it

On Sep 21, 2021, at 2:56 PM, Jim Lux <jim@...> wrote:

the fancy adjustable one

3 blades cut jacket, shield,dielectric. I enjoy mine.

Hey Jim,

Do you have a pointer to the fancy adjustable one? I've been having a hard time finding anything other than 2 and 3 blade non-adjustable ones

73, Willie N1JBJ

Yes, I can calibrate the device, but when doing measurements, I get a lot of lines in a mess. If you have a look at the photo - measurement - you can se a curve form, but rather thick. The form of the curve is correct, but there is a big difference between measuring point, and this makes the "thick line".

If time permits tomorrow, I will make a "correct measure ment with my NanoVNA-F and compare the result.

Karl Jan

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...

Karl Jan

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
gate, carefully close the gate and stop just before the strippers start to
pull the wire through the gate, release pressure on the handles, when
possible rotate the cable 90 deg, repeat. Use your thumb nail to slide the
jacket off. Now I cannot attest that there is no damage to the shielding,
my eyes are 70 years old but I use magnifiers and I haven't noticed any
shield strands coming adrift.

Hope this helps someone.

John
VE7KKQ

On Tue, Sep 21, 2021 at 11:57 AM Dragan Milivojevic <d.milivojevic@...>
wrote:

It depends what you mean by pro.
While I was working for a cable provider the service men
used cheap tools like these:



I usually use the first one for small diameter coax as it is much
faster than adjusting the second one.

For larger diameter coax, pipe cutter with a sharp blade works
great. This style:
Also get cable cutter pliers, especially when cutting larger diameter
cable.
Once you try it you'll newer go back to usual wire cutters that mangle up
the
dielectric and center lead. Something like this, but these are usually
cheaper
to get locally then on AliExpress:





On Tue, 21 Sept 2021 at 18:57, kk7xo via groups.io <kk7xo=
[email protected]> wrote:

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?

It depends what you mean by pro.
While I was working for a cable provider the service men
used cheap tools like these:



I usually use the first one for small diameter coax as it is much
faster than adjusting the second one.

For larger diameter coax, pipe cutter with a sharp blade works
great. This style:
Also get cable cutter pliers, especially when cutting larger diameter cable.
Once you try it you'll newer go back to usual wire cutters that mangle up
the
dielectric and center lead. Something like this, but these are usually
cheaper
to get locally then on AliExpress:




On Tue, 21 Sept 2021 at 18:57, kk7xo via groups.io <kk7xo=
[email protected]> wrote:

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?

On 9/21/21 11:14 AM, William Smith wrote:

For instance, this is still a work in progress, but, for RG-8x:

BNC Connectors from HRO: Lands Precision BNC-10Z-DGN
N-type for RG-8x: (Silver) and (nickel)

Strip Tool: LP HT-322
Crimp Tool: LP DL-801G

Go together well.

The same tooling works with RG-58 and LP BNC-10F-DGN

Note that while the stripper is nearly perfect for RG-8x BNCs, it might require a little fidding for the other cables and connectors. The LP spec sheets show a wide range of strip lengths, and even LP doesn't sell the appropriate strip tooling. Go figure.

YMMV.

That's why I eventually got the fancy adjustable one.? I had a single purpose for crimp on to RG58 for thinnet networks, worked great. But didn't quite work for other sizes. With the adjustments, I could fiddle with it until it was perfect for the connectors I had and the coax I had.
They work up to about 1/2" diameter as long as it's a smooth shield. They won't work on corrugated shields (although I'm sure someone makes a stripper for that)

It's kind of like the (wretchedly expensive) tools for semirigid and SMA connectors.? Get the right tool set up right, and you can crank out dozens of cables in a day, all perfect.

For instance, this is still a work in progress, but, for RG-8x:

BNC Connectors from HRO: Lands Precision BNC-10Z-DGN
N-type for RG-8x: (Silver) and (nickel)

Strip Tool: LP HT-322
Crimp Tool: LP DL-801G

Go together well.

The same tooling works with RG-58 and LP BNC-10F-DGN

Note that while the stripper is nearly perfect for RG-8x BNCs, it might require a little fidding for the other cables and connectors. The LP spec sheets show a wide range of strip lengths, and even LP doesn't sell the appropriate strip tooling. Go figure.

YMMV.

73, Willie N1JBJ

On 9/21/21 10:17 AM, Jim Lux wrote:

On 9/21/21 9:57 AM, kk7xo via groups.io wrote:

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?

One of those multiblade spin around the coax

I've used a Paladin CST for decades.

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 just one size of coax or multiples, etc.

The 2 level, fixed size coax ones are cheapest ($20-30), the fancy ones have cassettes that you can swap in if you regularly use multiple sizes of coax.

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

Dick,

Does the article indicate how much "blow-by" you get (due to the mechanical switches in this design) as the frequency increases?

Roger

On 9/21/21 9:57 AM, kk7xo via groups.io wrote:

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?

One of those multiblade spin around the coax

I've used a Paladin CST for decades.

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?