Published By
Created On
13 Aug 2020 19:03:56 UTC
Transaction ID
Cost
Safe for Work
Free
Yes
Ellie with the DPMS AR-15
Author
Content Type
Unspecified
video/mp4
Language
Unspecified
More from the publisher
Controlling
VIDEO
30 WA
30-watt-amplifier-7-mhz
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
...
https://www.youtube.com/watch?v=dAp3kVLqee8
Transaction
Created
1 year ago
Content Type
Language
video/mp4
Controlling
VIDEO
QRP-L
qrp-labs-qdx-kit-build-transmitter
In this video I complete the earlier receiver build
https://www.youtube.com/watch?v=KmpNxhZiJXg&t=1967s
0:00 A quick diversion into the QDX Bandpass filter
4:42 Walkthrough of transmitter build components
6:14 Winding the output transformer T1
11:53 Installing L4 the RFC coil
12:29 BS170s installed
12:58 On the air on 20m with the oscilloscope monitoring output - first contact
15:59 Calling CQ on 40m
18:36 Trying 3:3 turns ratio on T1 and wrapup
...
https://www.youtube.com/watch?v=7wgnr-Mgv7M
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
ETHAN
ethan-at-quail-creek-shooting-dpms-ar-15
...
https://www.youtube.com/watch?v=OqySqA8wEv0
Transaction
Created
1 year ago
Content Type
Language
video/mp4
Controlling
VIDEO
TINYP
tinypico-radio-part-2-tayloe-detector
Dan Tayloe's original document
http://www.norcalqrp.org/files/Tayloe_mixer_x3a.pdf
The Eagle files for the board are here
https://github.com/thaaraak/Tinypico-Radio/tree/master/eagle
No changes to the micropython source for this video
I meant to say LM4562 - https://www.ti.com/lit/ds/symlink/lm4562.pdf
A separate debugging video is here:
https://youtu.be/EarY64Lf3ls
...
https://www.youtube.com/watch?v=iwBk3jIxszI
Transaction
Created
1 year ago
Content Type
Language
video/mp4
Controlling
VIDEO
PYBOA
pyboard-stm32f4-radio
In this video I use the digital signal processing from the earlier video:
https://www.youtube.com/playlist?list=PLsMaN1bGWynysVNJgQ9jhQnYDfqz3-Cd8
and build a radio replacing opamps for phase shifting with DSP on the F4. The tayloe detector used is described here:
https://www.youtube.com/watch?v=iwBk3jIxszI
The code is up on github here:
https://github.com/thaaraak/PyboardRadio
The pyboard is available here
https://pyboard.org/
Note I am not using micropython but rather just flashing from STMCube with
https://www.amazon.com/gp/product/B01J7N3RE6/ref=ppx_yo_dt_b_asin_title_o01_s01?ie=UTF8&psc=1
The results were not as good as I had hoped. It looks like I damaged the Tayloe detector board and I wasn't getting the upper sideband suppression I had hoped. I will spin another board and post results
...
https://www.youtube.com/watch?v=I8ZwlgjXAZM
Transaction
Created
1 year 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 year ago
Content Type
Language
video/mp4
Controlling
VIDEO
PRODU
producing-double-sided-pcb-with-uv
In this video I show the method I use to produce PCBs using photosensitive dry film
Materials (no affilition for any)
Sodium Hydroxide (Lye) - ACE hardware
Sodium Carbonate (washing soda) - ACE Hardware
Photosensitive film - https://www.amazon.com/gp/product/B01NCS88LU/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
UV LED lights - https://www.amazon.com/gp/product/B08MZQGZLT/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
Transparency - https://www.amazon.com/Samsill-Transparent-Projector-Transparency-Printers/dp/B07F45YXJD/ref=sr_1_5?keywords=samsill%2Btransparency&sr=8-5&th=1
Ferric Chloride etchant - https://www.amazon.com/gp/product/B008O9XMYA/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
Copper board - https://www.ebay.com/itm/313742922377
Kicad - https://www.kicad.org/
Laminator - nothing special here as you don't need high heat - a simple Iron would do also
Laser Printer - Brother HL-2300D (ink jet wont work)
Old Picture Frame
0:00 Intros
1:29 Materials needed
5:28 The process in a nutshell
7:00 Printing the Transparencies
10:40 The transparencies
11:44 Doubling up the transparencies
12:00 Aligning transparencies front and back
13:11 Using an old picture frame to sandwich the board
14:12 Laminating the photosensitive dry film to the copper board
17:00 Exposing the board to UV
19:26 The exposed board - and removing the protective film
20:37 The sodium carbonate bath
23:45 Etching the board **** DANGER - PLEASE USE GOGGLES and GLOVES ****
24:23 The etched board
25:33 Removing the film with sodium hydroxide **** DANGER - PLEASE USE GOGGLES and GLOVES ****
27:00 The completed board
27:31 The completed board under the microscope
...
https://www.youtube.com/watch?v=Q50hZpxnpME
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
TINYP
tinypico-radio-part-9-transmitter
In this video I start to build up the transmitter portion. Not much micropython here unfortunately.
I am going to be using a few sources. This is traditional phasing transmitter
http://www.arrl.org/files/file/Technology/tis/info/pdf/9304027.pdf
and this is one built around the Tayloe mixer seen in the receiver
http://www.wb5rvz.org/ensemble_rxtx/index?projectId=14
Specifically this portion
http://www.wb5rvz.org/ensemble_rxtx/09_qse
I will be building both and comparing. In this video I will build up the Audio phasing section. Schematics and board here:
https://github.com/thaaraak/Tinypico-Radio/tree/master/kicad/Transmitter
More on Phasing radios can be found in Chapter 9 of Experimental Methods in RF design
...
https://www.youtube.com/watch?v=_56MiQ4oBJw
Transaction
Created
1 year ago
Content Type
Language
video/mp4
Controlling
VIDEO
ENSEM
ensemble-rxtx-build-11-driver-finals-and
Final build video with driver, finals and testing.
One note, the initial testing was done with 7 Mhz. This is wrong. The build is for the 30, 20 and 17m bands and that is why the signal produced on 40m was not a pure sine.
...
https://www.youtube.com/watch?v=t--Jya1244Q
Transaction
Created
1 year ago
Content Type
Language
video/mp4