¿ªÔÆÌåÓý

ctrl + shift + ? for shortcuts
© 2025 Groups.io
Date
Re: touch screen question - new nanovna H
Yes, remove the protective film. I had to take a screwdriver and remove the front cover in order to get mine off, but that's easy. 73, Willie N1JBJ
By William Smith <w_smith@...> · #23458 ·
touch screen question - new nanovna H
Hello, This is my first post to this group after just receiving a nanoVNA purchased from Aursinc. The clear plastic case for the unit and accessories has a label that says "Hardware version 3.5". The
By Roger · #23457 ·
Re: Call for discussion on Bluetooth HC-05 module #bluetooth
On Jul 20, 2021 15:46, Anne Ranch <anneranch2442@...> wrote: > > > > I realize this is not primary purpose of this forum, however, recent > discussion of HC-05 Bluetooth module "issue" prompted
By jankae · #23456 ·
Re: Call for discussion on Bluetooth HC-05 module #bluetooth
OK, this is the problem with Chinese cloned parts, anything popular is going to get ripped off, cloned till it's no longer recognizable, and sold for one cent less than the other guys, which is going
By William Smith <w_smith@...> · #23455 ·
Re: Call for discussion on Bluetooth HC-05 module #bluetooth
http://www.martyncurrey.com/hc-05-and-hc-06-zs-040-bluetooth-modules-first-look/
By Dragan Milivojevic · #23454 ·
Re: Call for discussion on Bluetooth HC-05 module #bluetooth
Er, that is actually three options not two (¡°couple¡± implies two). There is actually a fourth option - don't switch on your computer. Steve (nitpicking) L.
By Stephen Laurence · #23452 ·
Re: Call for discussion on Bluetooth HC-05 module #bluetooth
OK, I shall proceed. Let me say that I am unable to find HC-05 specification which will actually describe 1. what does the button on my HC_05 do. I realize there are many versions of HC-05 and I am
By Anne Ranch <anneranch2442@...> · #23451 ·
Re: Negative Antenna Gain
I think the OP was working at VHF and UHF, so the RBN (which is HF) doesn't help much there. Antenna gain is usually stated in dBi, gain relative to a theoretical isotrope (which cannot exist in
By Jim Lux · #23450 ·
Re: Negative Antenna Gain
https://www.staples.com/Tram-Amateur-Dual-band-Base-Antenna-With-17ft-Base-Antenna-8dB-144MHz-11dB-440/product_2088511 is 8.3 and 11.7, so maybe they took a page from WiFi specs and added the two
By William Smith <w_smith@...> · #23449 ·
Re: Negative Antenna Gain
Hi Anne Yes, the gain values were more a product of the marketing department than the engineering department.? ? I vividly remember a 5/8ths ground plane antenna with 17 dB of gain! (And they would
By KENT BRITAIN · #23448 ·
Re: Call for discussion on Bluetooth HC-05 module #bluetooth
IMHO it's appropriate, as it seems to be a common 'accessory' that people are interested in. If anyone is annoyed by it, they have a couple of options at the bottom of every single message posted to
By William Smith <w_smith@...> · #23447 ·
Re: Negative Antenna Gain
Assuming the OP is licensed amateur radio enthusiast and primarily interested in evaluation HF antennas here is a resource to check https://www.ncdxf.org/beacon/intro.html per introduction - "reverse
By Anne Ranch <anneranch2442@...> · #23446 ·
Call for discussion on Bluetooth HC-05 module #bluetooth
I realize this is not primary purpose of this forum, however, recent discussion of HC-05 Bluetooth module "issue" prompted me to post this. ( I am not in favor of hijacking somebody else thread ) . If
By Anne Ranch <anneranch2442@...> · #23445 ·
Re: Negative Antenna Gain
Hi Jim It would be a good start, certainly a learning experience.I commonly haul a 50 MHz - 47 GHz antenna range to VHF/UHF Conferences. The Nano does not have the dynamic range to do a very good
By KENT BRITAIN · #23444 ·
Re: Help with bluetooth HC-05 module #bluetooth
You do know that you issue the AT commands from the serial port, not through the Bluetooth connection. Just making sure. Once when I had ordered 5 of these, one wouldn't work while the others had no
By Max · #23443 ·
Re: Negative Antenna Gain
pretty much. You need to watch out for ground reflections (so good practice is to measure with the AUT at multiple different heights spanning a wavelength or two) And, if you want accurate gain
By Jim Lux · #23442 ·
Re: Help with bluetooth HC-05 module #bluetooth
Thank you DiSAlord, I will do so lateron, today the weather is vy nice so I won't stay inside now. Regards, Jos Op 19-7-2021 om 21:51 schreef DiSlord: -- Dit e-mailbericht is gecontroleerd op virussen
By Jos Stevens · #23441 ·
Re: Negative Antenna Gain
If you are trying to measure antenna gain, this is not the best way to do it. Ideally, the two antennas are separated by a distance that is greater than the Rayleigh distance. That could be hundreds
By Zack Widup · #23440 ·
Re: Help with bluetooth HC-05 module #bluetooth
Since I cannot get? connect to the device I could not issue AT commands. I did use this time to 57600 Baud to try if it worked with an other (lower) speedrate then I used before. When I keep a record
By Jos Stevens · #23439 ·
Re: Negative Antenna Gain
If I understand correctly, all I need is 3 antennas. 1 receiving reference, 1 transmitting reference, 1 DUT. Connect the recieving reference to the S21/CH1 port. Connect the transmitting reference to
By Jim Barber · #23438 ·