Re: characteristic impedance
No luck with that link. Bob Hi Bob, Please download from: http://ha3hz.hu/images/download/nanoVNAPartner0.20.rar neb sent it to me for testing, which I gladly did. Since I didn't get a detailed
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Bob Albert <bob91343@...>
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#10318
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Re: How to find the right ferrite toroid for a receiving antenna balun?
See also http://k9yc.com/2018Cookbook.pdf for "The Measurement Setup For Chokes" and "Winding Guidelines".
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Oristo
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#10317
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Re: Is my off brand a Brick?
Yes, Oristo, I had found that sane 'workaround' last night. I will give it a test today. John TI4JWC
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John
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#10316
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Re: How to find the right ferrite toroid for a receiving antenna balun?
I think Dave meant to link this document by K9YC - http://k9yc.com/RFI-Ham.pdf. It¡¯s the one where he compares a number of different types (#43, #61, #73, #78, etc) and why he often prefers #31. But
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Pomology
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#10315
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Re: Alibaba ordering
On Mon, Jan 27, 2020 at 04:17 AM, Gyula Molnar wrote: The parcel spent 6 days on the road, except it had no movement for a week. ============================================================== Gyula,
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hwalker
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#10314
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Re: How to find the right ferrite toroid for a receiving antenna balun?
All the data he presents in the referenced paper uses 31 material. The type of choke I referred to is shown in Figure 3 of the paper. I see nothing nixing 43 or other material (31 and 73) in the
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W0LEV
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#10313
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Re: characteristic impedance
Hi Yes here it is Remember to set a frequency span e.g. 0.05 to 500Mhz then calibrate and save to e.g. location 0. Then follow the steps described in the right side I see you missed that Kind regards
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Kurt Poulsen
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#10312
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NanoVNA-Saver and NaNOVNA-H4 Calibration
The problem I had with the big noise in the phase chart of NanoVNA-Saver was because I was measuring the load standard I had used for calibration. The Returnloss measured after calibration was that
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Jos Stevens
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#10311
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Re: Alibaba ordering
Mrs. Maggie is doing very well, correct. After I sent the money, I asked if it had been received. He replied that he did and sent a pdf of the shipment with a photo of the shipment. You can follow the
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Gyula Molnar
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#10309
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Re: How to find the right ferrite toroid for a receiving antenna balun?
Here's what my 2 core FT-240-K choking impedance looks like. X=0 a little above 11 MHz after which X is capacitive.
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W5DXP <w5dxp@...>
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#10308
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Re: characteristic impedance
Works perfectly with me, any firewalls or antivirus protection hyperactive? OE8UWW
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Helmut Wabnig
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#10307
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Re: characteristic impedance
Sorry, can't get the file from http://ha3hz.hu/images/download/nanoVNAPartner0.20.rar nor /g/nanovna-users/wiki#nanoVNA-Partner, Any suggestions? Oristo <ormpoa@...> ì¶
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ñRÓñ÷ë
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#10306
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Re: characteristic impedance
Thanks, Gyula; link updated at /g/nanovna-users/wiki#nanoVNA-Partner
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Oristo
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#10305
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Re: characteristic impedance
Hi Bob, Please download from: http://ha3hz.hu/images/download/nanoVNAPartner0.20.rar neb sent it to me for testing, which I gladly did. Since I didn't get a detailed description, there are a few
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Gyula Molnar
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#10304
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Re: OT: But I hope someone from this group can provide some info on this
Bonjour Pierre, Non, il n'y avait pas de possibilit¨¦ de contr?le par le port USB dans le firmware. Je te joins le sch¨¦ma r¨¦cup¨¦r¨¦ aupr¨¨s du vendeur. Cordialement Jose
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Jose Luu
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#10303
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Re: Is my off brand a Brick?
The on/off switch is a good point to provide a clean 5Volt. I use the free pin of the switch to connect to 5Volt so when I switch off it connects to the battery And Yes, when running from a 5Volt
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Erik Kaashoek
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#10302
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Re: characteristic impedance
Hello Kurt, Do you please have an example for measuring coax impedance with nanoVNA partner version 0.20 ? Unfortunately neb40gsm does not provide any help info. Attached is:
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Rudi
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#10301
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Re: How to find the right ferrite toroid for a receiving antenna balun?
perhaps off-topic but this is the first item of interest to me. keep it up. much of the list is just nattering. wrote:
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Tony Michel
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#10300
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Re: How to find the right ferrite toroid for a receiving antenna balun?
No ... that simply isn't true.? W4OP is correct for the reason he states. Whether on topic or off topic, this isn't the place to be spreading bad information. Dave?? AB7E
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Dave AB7E
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#10299
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Re: How to find the right ferrite toroid for a receiving antenna balun?
I agree that this topic is outside the general outlines for this list, but then again I didn't bring it up.? For anyone who would actually like to understand what makes a good common mode choke,
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Dave AB7E
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#10298
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