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Re: Measuring a Chokes Resistance and Reactance #measurement
Hi Tom I tried to install and did set the properties as shown in the png file but got error two error prompts with information that liblapack.dll and 587.dll was missing. So not straight forward to
By Kurt Poulsen · #13105 ·
Re: new member
Hi Bill, There's a wealth of information in the files section. 72 / 73... Larry AC8YE
By Larry - AC8YE · #13104 ·
new member
Hi, I have some idea of a few things I can do with new NanoVNA when it arrives. I will be paying attention to the posts here to help learn about the things it can do that are new to me. 73, Bill KU8H
By Bill Cromwell · #13103 ·
Re: #buying #buying
Hi Larry, Hoping you can assist, I am trying to make a bulk purchase of 22 H4's for radio club members in Australia, I have filled in the contact email to Maggie requesting a quote on shipping etc and
By Wayne Johnson · #13102 ·
Re: Testing directional coupler directivity and bandwidth
On Fri, May 1, 2020 at 01:40 PM, WB2UAQ wrote: Just did some return loss testing with the hp 8721 and not working as expected. After calibrating with a short the RL for an VSWR of 1.5 should be 14 dB.
By hwalker · #13101 ·
Re: contact details for Hugen
Sorry Dennis, Only members of my local Radio Club, My biggest problem is how on earth do I get my verification code by email to use Alibaba.com to ask them for a quote??Just keeps going round in
By Wayne Johnson · #13100 ·
Re: Measuring a Chokes Resistance and Reactance #measurement
Hi Tomasz. I will take a look at HAM_VNA. I have just been using spreadsheets. I am in the Bangor and District radio club i see you live near. Keep safe 73 de MI5AFL Ian __
By Ian McCrum MI5AFL <ij.mccrum@...> · #13099 ·
Re: Testing directional coupler directivity and bandwidth
You can measure all paths, one by one, measure the loss in the paths. Just remember to terminate all unused ports into 50 ohm resistors/terminators
By groups@... · #13098 ·
Re: Measuring a Chokes Resistance and Reactance #measurement
I find this topic non-trivial.. I usually measure components with S11 only and for displaying impedance and creating equivalent circuit use a copy of HAMVNA originally by Alex VE3NEA, I modified and
By tom Kawala · #13097 ·
Re: NanoVNA firmvare, compiled by DiSlord #firmware
Download NanoVNASaver development version from https://github.com/mihtjel/nanovna-saver/tree/Development Little fix Hardware.py to support H4 and 201 datapoint All work good
By DiSlord · #13096 ·
Re: Testing directional coupler directivity and bandwidth
Here is a pdf link to the return loss bridge based on the Stockton design: https://www.yagicad.com/Bridge1.pdf I¡¯ve been following this thread and I kept hearing about the Stockton design. Didn¡¯t
By Joe Joncas · #13095 ·
Re: Testing directional coupler directivity and bandwidth
Just did some return loss testing with the hp 8721 and not working as expected. After calibrating with a short the RL for an VSWR of 1.5 should be 14 dB. Measure about 13 dB. If I calibrate with an
By WB2UAQ · #13094 ·
Re: Log spaced frequency measurements #improvement #calibration
I just found pull request #129 by ae6ty, which does 95% of what I was thinking of! Adding small linear/more dense regions for the amateur bands might be useful as well....
By Rob O · #13093 ·
Re: Measuring a Chokes Resistance and Reactance #measurement
Open s2p file in VNWA software
By Ruslan Migirov · #13092 ·
Re: rf interferience
You read the Console Command user guide...... ;-) You need to get into the console mode (talk to the Nano via Putty or TerraTerm) and use the 'power' command. From the Console Command guide: power -
By Larry Rothman · #13090 ·
Re: rf interferience
What do you do to set the power output ? Tnx es 73, Dick, W1KSZ ________________________________ Sent: Thursday, April 30, 2020 9:16 AM To: [email protected] <[email protected]> Subject:
By Dick · #13089 ·
Re: #buying #buying
Paul, please refer to the forum wiki - it has all the answers you're looking for. There is also a files section in the forum with several user guides and other great info. Cheers!
By Larry Rothman · #13088 ·
#buying #buying
I see comments on various models, such as "F", "H" "H4" etc. What are the differences in these models? Thanks, Paul W8SBH
By Paul W8SBH · #13087 ·
Re: Measuring a Chokes Resistance and Reactance #measurement
Hi Pete You are right it depends on the type of DUT whether attenuations is acceptable and even a SMA inline attenaultor is not 50 ohm either. I have found the shunt T is ideal when measuring coils /
By Kurt Poulsen · #13086 ·
Re: NanoVNA firmvare, compiled by DiSlord #firmware
Add bigger font support not difficult (need just redefine font init, and made some space limit and changes in plot.c and ui.c), sorry but i not plan do it (and support it), source code open and
By DiSlord · #13085 ·