0:00 Intro 0:51 Radio Modules description 1:10 Transmitter 3:00 Receiver 6:30 Order of construction 8:24 Building/Testing Sidetone generator 10:35 Building/Testing the low pass filter 12:28 Building the transmitter 14:34 Testing the transmitter - and a problem 20:22 Wrap up ... https://www.youtube.com/watch?v=HLBK545heEA
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.
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https://www.youtube.com/watch?v=WEw7npUQ6WQ
In this video series I will be building up the Magnis SDR. All the schematics and manual can be found here:
https://theveteransdr.com/downloads.html
The Cypress PSoC documentation
https://www.cypress.com/file/127131/download
PCM3060 Audio Codec
https://www.ti.com/lit/ds/symlink/pcm3060.pdf?ts=1635695536210&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FPCM3060
0:00 Intro
1:48 The Cypress PSoC
2:26 The PCM3060 Audio Codec
3:00 Board walkthrough and Parts required
5:00 The Magnis Manual
5:46 Build order
9:50 Wrap up
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https://www.youtube.com/watch?v=MKxdg0Hv1wg
This video is a followup from the ESP32 based exciter I built earlier
https://www.youtube.com/watch?v=jnVwxNwio8E
In this video I build up an IRF530 based amplifier kit from ebay (I am not affiliated in any way with this)
https://www.ebay.com/itm/324226076515?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
I found some very helpful documentation from these sites
https://dk9jc.de/blog/equipment/142-diy-kits-70w-ssb-linear-hf-power-amplifier-ft-817-kx2-kx3
https://pa-11019.blogspot.com/2016/11/diy-kits-70w-ssb-linear-hf-power.html
I drew the circuit out in Kicad and put it up on my github repo
https://github.com/thaaraak/70W-Amplifier
The LPF was design with this tool
https://rf-tools.com/lc-filter/
and the final LPF is here
https://drive.google.com/file/d/1peP7PhWqO40iudCxUwbCiS6jZ2zzk-PE/view
0:00 Intro and Component Walkthrough
1:52 Schematic Walkthrough
4:08 Board Walkthrough
5:48 Endcaps removed from board
6:19 Output transformer first end cap
6:59 Ferrite tubes and bushings in place
8:26 Testing continuity
9:00 T/R Relay installed
10:30 Relay and Bias tested
13:59 Input transformer installed
14:39 Electrolytics installed
14:57 IRF530s installed
15:40 Output/Input transformers wound
18:15 feedback resistors installed
18:54 RFC installed
19:24 Excited connections to the Amplifier and test setup
21:55 Final testing on the oscilloscope
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https://www.youtube.com/watch?v=JgiakIxMjfI
In this series I will be building a 20m SSB transceiver from this site
https://www.qsl.net/v/va3iul//Homebrew_RF_Circuit_Design_Ideas/Homebrew_RF_Circuit_Design_Ideas.htm
The specific transceiver is this one
https://www.qsl.net/v/va3iul//Homebrew_RF_Circuit_Design_Ideas/TRX_QRP_20m_SSB.gif
Link to the MC3362 datasheet
http://pdf.datasheetcatalog.com/datasheet/motorola/MC3362DW.pdf
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https://www.youtube.com/watch?v=izTtZlVAlt4
This amplifier is from Experimental Methods in RF design
Some changes/substitutions:
- FT 114-61 instead of FT 61-114
- BN-43-202 instead of BN-43-201
- IRF540 instead of IRF530
- 7xFB 43-101 instead of 3x FB43-801
- BS-170 for Bias on/off
All toroids and 5Watter available from kitsandparts.com. Silver Mica caps from various places
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https://www.youtube.com/watch?v=dAp3kVLqee8