Published By
Created On
18 Jul 2020 08:18:49 UTC
Transaction ID
Cost
Safe for Work
Free
Yes
Desert Eagle .50 at Quail Creek
Author
Content Type
Unspecified
video/mp4
Language
Unspecified
More from the publisher
Controlling
VIDEO
ESP32
esp32-radio-on-a-board-part-2-audio
This is the second part of the ESP32-A1S Radio I started here:
https://www.youtube.com/watch?v=redvZ7LcXT0
The earlier video I did on the arduino audio tools is here:
https://www.youtube.com/watch?v=oqtkR2FRKYI&t=156s
0:00 Intro
0:35 Audio Interface on the Board
2:03 Testing the board using the SineWaveGenerator
3:58 A problem discovered with audio output
6:01 Testing Audio Input to Output - and another problem
7:43 Input problem fixed?
8:19 Testing Audio I2S In to Audio I2S Out
...
https://www.youtube.com/watch?v=fqF4M520zEc
Transaction
Created
1 month ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
QST W
qst-wattmeter-part-2-installing-and
In this video I install the AD8307 logarithmic amplifier. If you want to skip the Hot Air gun work go to approx 09:10.
The board I made is on github at
https://github.com/thaaraak/QST-Watt-Meter-
I have an Eagle schematic and board and also a PDF of the board. Dont forget to print out mirrored.
...
https://www.youtube.com/watch?v=WEw7npUQ6WQ
Transaction
Created
1 month ago
Content Type
Language
video/mp4
Controlling
VIDEO
QCX T
qcx-transceiver-part-7-final-assembly
This video completes the series with the transmitter assembly, power testing and on the air.
The 15W QRPoMeter can be found on eBay. I have nothing to to with this product but its a fun and effective little kit
https://www.ebay.com/itm/QRPoMeter-Digital-15W-QRP-Wattmeter-Dummy-Load-VSWR-Meter-Kit/254438084535
...
https://www.youtube.com/watch?v=hjk74vSZF8o
Transaction
Created
1 month ago
Content Type
Language
video/mp4
Controlling
VIDEO
ESP32
esp32-with-external-lora-board
This is a followup to an earlier video I did
https://www.youtube.com/watch?v=Gl6FiF01iAE
The above video gives a full background on LoRa - In this video I show how to connect a standard ESP32 to an off the shelf LoRa board.
This is the LoRa board I am using
https://www.amazon.com/gp/product/B07BD42DYY/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
This as antenna (note the above board does not come with an antenna)
https://www.amazon.com/gp/product/B086ZG5WBR/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Code is pretty much the same as the Heltec board although pins are different (and as I note the low power LoRa output pin works on this board)
https://github.com/thaaraak/ESP32-Lora
...
https://www.youtube.com/watch?v=yIS4DbOkT60
Transaction
Created
1 month ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
20M S
20m-ssb-amplifier
I thought I do a video showing show experiments I have been doing for a 5W push pull style amplifier at 14 Mhz.
Charlie Morris has a great video explaining the math here
https://www.youtube.com/watch?v=CtyabG69d4g&t=1503s
The push/pull style amplifier is based on the Ensemble RXTX power amplifier described here
http://www.wb5rvz.org/ensemble_rxtx/10_pa
The ltspice circuit is on my github repo
https://github.com/thaaraak/ltspice
Note that the original ensemble amplifier sets the bias of the mosfets using a reference circuit which I did include in the ltspice model - but I used a simple 5V regulator in mine.
Here's the site that I used for the lowpass filter
https://rf-tools.com/lc-filter/
and the Toroid calculator is here
https://toroids.info/T37-6.php
...
https://www.youtube.com/watch?v=efGYnsF4bDU
Transaction
Created
1 month ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
MAGNI
magnis-sdr-part-4-usb-update-tx-rx
I had hoped to get all the receiver circuitry done but this video was running a bit long so I stopped after installing the relays and testing the band pass filters
Here's the magnis forum (thanks again to N8VET)
https://groups.io/g/TheVeteranSDR/topics
0:00 Intro and plan of attack
2:17 USB update and correction
3:10 Controlling the LO frequency with HDSDR
4:20 Installing Q1 and Q2 for Transmit and Band change control
5:46 Relays K1, K2 and K4 installed
6:05 Relays tested
7:16 Checking continuity for K2 and K4
8:27 Checking the bandpass relay K1
8:57 Building the band pass filters for 20 and 40m
10:02 Bandpass filters built
11:59 Bandpass filter installed and testing setup
12:32 Observing the output of the 20 and 40m bandpass filters on the spectrum analyzer
...
https://www.youtube.com/watch?v=7QMK3L9dE1U
Transaction
Created
1 month ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
QRP L
qrp-labs-10w-amplifer-build
In this video I put together the QRP Labs 10W Linear Amplifier
https://qrp-labs.com/linear.html
I mention a couple of times that the bias reference circuit sets the BS170 DC bias at ~10V - that isn't correct its 2.7V
Index
0:00 Intro
05:27 Build Order
07:58 Power supply
09:12 Power supply Testing
09:50 BS170 Bias Reference
13:02 BS170 Bias Testing
14:25 Input Splitter and Winding T201
19:57 Input Splitter Testing
22:00 BS170 Push Pull 1st Stage and Winding T202
26:21 How to tell BN43 and BN61 cores apart
27:09 First stage RFC
28:13 Testing First Stage
29:28 Final Stage Build
31:59 IRF510 Install
32:42 Mounting to Heatsink
34:26 Final Mounting
36:00 Installing T203 and T204
38:49 Final testing - power measurement
40:38 Bias Pot adjustment
41:47 Harmonics displayed on Spectrum Analyzer
...
https://www.youtube.com/watch?v=wBiz594O5LA
Transaction
Created
1 month ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
HOMEB
homebrew-si5351-board
I had been meaning to create a homebrew version of the si5351 boards that Adafruit and others sell. This is a quick video going through that build
Here's the circuit
https://github.com/thaaraak/si5351
and the code I used to test
https://github.com/thaaraak/ESP32-A1S-Tayloe/blob/master/si5351/si5351.ino
Here are the parts from digikey
https://www.digikey.com/en/products/detail/skyworks-solutions-inc/SI5351A-B-GTR/4069612
https://www.digikey.com/en/products/detail/epson/TSX-3225-25-0000MF20X-AJ3/5260885
0:00 Intro
1:14 The circuit
2:09 The board built
2:35 Testing and wrapup
...
https://www.youtube.com/watch?v=I5qqiTxyq0M
Transaction
Created
1 month ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
OLLY
olly-running
...
https://www.youtube.com/watch?v=Se-GENVP5lQ
Transaction
Created
1 month ago
Content Type
Language
video/mp4