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Mike M. KU4QO That fake screen clear just scrolls the last line entered on the screen off the top of the display. This gives the impression that there is only one constantly updating data being

Arv, Thanks for posting. Can you explain the reason for this line in your code? Serial.println("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"); // fake screen clear I'm wondering if it had anything to do

This Arduino based voltmeter is handy for use on the workbench. It can be built as a zero-to-5V version, or as a zero-to-50V version. This is free code, feel free to modify it to suit your own needs.

Have you built it? Notberto – LU5DNM De: [email protected] [mailto:[email protected]] En nombre de nestor fernando casari Enviado el: sábado, 15 de septiembre de 2018 10:50 a.m. Para: [email protected]

I added a dip meter function to my SNA by using a Return Loss Bridge and a pickup coil. Added a quick scan function to find the dip over the whole frequency range, and then center it on the display.

Maybe you see this before but it whorth a check vna with 455 khz if nice concept and very easy to do it at home? The link http://dspview.com/viewforum.php?f=25&sid=cd4692b1464d64b7cb64974a28145306

This is probably best for US hams because it relates to standard 3/4 inch (1.05 inch OD) PVC Plastic pipe as coil forms. Recently I had opportunity to perform tests on 3/4 inch (1.05 inch OD) PVC pipe

Hi Arv, I built this Lab Power Supply out of a Dell ATX computer power supply: https://www.youtube.com/watch?v=WeYK2gY4z-A I had fun building it because I had to study up on all the different power

https://www.instructables.com/id/DIY-Power-Supply-/?utm_source=newsletter&utm_medium=email These work well but there is room for improvement. Add another 2200 to 4400 mfd across the +12V and +5V

Qrpguys have a Field Strength Meter which has the 8307 chip on it along with a 3 wire voltmeter ...W1GHZ has a schematic of his power meter (DEMI-ABPF) Looks line terminate input w/50 ohm resistor and

Those are popular… Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Villa Grand Piton –

Arv And for the price of $12. I will protect it with a plastic pen. I'll post the photos as soon as it's done. 73 QRO Arv Gilles F1BFU /FR 2018-09-11 23:11 GMT+02:00 Arv Evans <arvid.evans@...>:

Giles That looks very good. With power connections it seems to be an "active probe" which should be good for general use and also for use with a spectrum analyzer to follow signal paths to see where

I forgot the diagram. here it is Gilles F1BFU / FR 2018-09-11 22:32 GMT+02:00 Arv Evans <arvid.evans@...>: -- Gilles - F1BFU/FR

my RF probe bought on eBay. Attached photos. 73 QRO Gilles F1BFU / FR 2018-09-11 22:32 GMT+02:00 Arv Evans <arvid.evans@...>: -- Gilles - F1BFU/FR

RF Detector Probes can also be used with your spectrum analyzer to trace signals through circuits, and to note places where the signal is clean versus where it has spurs or harmonics. _._

RF Detector probes are very useful, but you have to understand how to use them, and what they are telling you. http://n5ese.com/rfprobe1.htm http://www.n5ese.com/rfprobe2.htm

Network analyzers run the full range from simple to complex and manual to automatic. There are many on-line advertisements for commercial units and many designs for making your own SNA. What is an

Hello I have been playing with use of hashtags on this groups.io site.? The result indicates that this may be an interesting way to group related discussions under a single topic, and thus help with

Another test set from older times that is not seen much in our modern era is the Q-Meter. It is used to find the Q-factor of components and circuits. This is interesting because it lets you predict