As of 2022 there are many badly performing clones on the market. V2/3GHz NanoVNA uses parts like ADF4350 and AD8342 which are costly and clones have been cutting costs by using salvaged or reject parts.
See official store and look for V2 Plus4/V2 Plus4 Pro versions only to avoid getting a bad clone. We have stopped selling V2.2 versions since October 2020, so all V2 hardware that are not Plus or Plus4 are not made by us and we can not guarantee performance.
Cheap torque wrenches on Aliexpress. Search for "Mxita sma torque wrench". Around €15-20.
You can have it adjusted to the torque you need. Steel sma connectors need 1 Nm, gold plated brass 0.5 Nm.
Hi there,
I might buy one just to compare with my 3D printed wrenches.
Do you ask the seller to adjust the torque, or how do you measure 0.5 Nm ?
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On Sat, 25 Apr 2020 at 18:03, Reinier Gerritsen <r.gerritsen@idcircuits.com>
wrote:
When you order, you can ask the seller to adjust it. I order 5 pcs, also
for my job. However, the screw setting the required torque was not
locked, so the calibration did not hold. I recently ordered a cheap
Newton meter (5N range). With a piece of wire at 125 mm from the sma
axis, you need a force of 4N to get a 0.5 Nm torque. Easily calibrated
yourself.
Op 25-4-2020 om 23:24 schreef CT2FZI:
You gave an idea: If you are talking about those cheap spring type Newton meter that we can find at aliexpress, I can print a 125mm SMA wrench and with a simple jig I can apply the calculated 4N, with no need of a specialized torque wrench ...
Just hang the newton meter above and apply the force till 4N.
I ordered a "Mxita sma torque wrench" from AliExpress in January and after 10 weeks it had not come, so I gave up on it. Eventually I was able to get a refund. The Tindie V2 page now advises that shipping is taking 60-100 days.
Bob
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