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Joined: Sat, Apr 4th 1998, 00:00 Roles: Super Moderator Moderates: N/A

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QST Downloads Feb 19th 2016, 16:34 9 13,728 on 19/4/24
March 2016 QST Compact Multiband Dipole Feb 19th 2016, 15:23 1 8,535 on 19/2/16
Antenna analyzer vs feedline type Sep 21st 2012, 14:37 1 10,120 on 21/9/12
USB to Serial Port problems--Prolific Drivers Aug 3rd 2012, 18:27 2 11,375 on 26/12/15
Italian Phishing emails! Dec 13th 2011, 14:20 1 9,801 on 13/12/11
John K0GMO needs help designing SS Amp Nov 17th 2011, 15:53 1 9,665 on 17/11/11
1 Farad Capacitor to Eliminate Headlight Flicker? Oct 19th 2011, 13:14 4 12,256 on 9/11/11
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Latest Posts

Topic Author Posted On
Telemetry on 6/4/23
The Shannon Hartley Channel capacity theorem can be useful for predicting how much SNR you need for a particular data rate. ISM bands can be quite noisy as there are so many unlicensed devices using there bands.
Should I tune for Resistance or Impedence? KT8DX on 31/3/23
If your head is swimming, it is likely that you aren't a math genius that can easily understand numbers well enough to tune by them. Many folks think in terms of pictures, so graphical representations are more understandable.

You may want to investigate other analyzers to see if there is something with a display you understand.
It may help to practice at home.
Should I tune for Resistance or Impedence? KT8DX on 27/3/23
A Smith Chart is a graphical representation of impedance that is more intuitive than R +/- jX

If you use a Smith Chart normalized to 50 ohms, the closer you get to the center the better the SWR.
"Error in Sound Input" Message Goldingen81 on 24/3/23
This may be a memory access violation
You may want to try JTDX and see if the problem persists.
Ferrite cores are significantly more effective at HF if 10 to 15 turns are wrapped around the toroid.

Zak W1VT
ARRL Senior Lab Engineer
keying NM0L on 20/3/23
12F629 PIC programmed as a keyer. Input by pins 2 and 3.
Accepts straight key input if the ring and tip are connected together at power up.

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