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2 Jun 2020 07:14:20 UTC
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Modifications to the MDT 7 MHz QRP transceiver (and a 2 x MDT contact)
Modifications for the OzQRP MDT 40m DSB transceiver kit. They improve frequency range, tuning ease and convert a dynamic microphone into a speaker-microphone. There is also a demonstration of what QRP DSB from another MDT sounds like on a direct conversion receiver. It can be quite copiable but tuning in is much harder than for SSB.
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https://www.youtube.com/watch?v=rDd4cjkOAi8
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https://www.youtube.com/watch?v=rDd4cjkOAi8
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More from the publisher
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WANT
want-to-become-a-ham-buy-this-month's
A look at the 14 page feature all about amateur radio in this month's (April 2024) issue of Silicon Chip. You'll find it at most good newsagents.
Details of the Australian Ham Radio Handbook referred to can be found here:
https://books.vk3ye.com/index.htm
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https://www.youtube.com/watch?v=AQMn7lb04p0
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1 month ago
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video/mp4
English
Controlling
VIDEO
WHICH
which-crystal-set-kit
Thinking about getting someone a crystal set kit for Christmas? In this video I compare two kits that are available online and at retail outlets. Watch to find out which is the winner.
Science Fair kit: https://www.radiomuseum.org/r/radio_shac_science_fair_crystal_rad_2.html
Aviosys circuit: https://akizukidenshi.com/download/ds/aviosys/2pk2300_k23_crystal_radio.pdf
Cool386 article: https://www.cool386.com/crystal/crystal.html
PS: If you liked this video please consider supporting Amateur Radio VK3YE by:
* Subscribing on YouTube
* Checking my books page at https://books.vk3ye.com
* Shopping on Amazon via: https://amzn.to/3iiDQXv, or
* Shopping on eBay via: https://ebay.us/i9DuWP
(then if you buy something I'll get a small commission at no cost to you)
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https://www.youtube.com/watch?v=pRqXy77rDlo
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Created
5 months ago
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video/mp4
English
Controlling
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AUSTR
australian-foundation-amateur-homebrew
OFFER CLOSED! Australian Foundation amateurs can now build their own transmitting equipment thanks to improved regulations. To celebrate we're giving away parts to put more Foundation homebrew rigs on the air. Just put your Australian Foundation callsign in the comments below and I'll send you a free 7.2 MHz ceramic resonator suitable for various receiver and transceiver projects (Be quick - maximum 20 people).
Building from schematic diagrams (project for your ceramic resonator): https://www.youtube.com/watch?v=yEnqAQbQTcE
More on the Beach 40: http://home.alphalink.com.au/~parkerp/projects/projbeach40.htm
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https://www.youtube.com/watch?v=t0DQhttxcSg
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Created
1 year ago
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video/mp4
Controlling
VIDEO
CHEAP
cheap-10-111-mhz-crystals-how-far-do
Cheap 10.111 MHz crystals are sometimes available in bulk for a few cents each. They're handy for 10 MHz homebrew CW transmitters. How well do they work in a VXO circuit?
In this video I try two crystals in parallel. Series L and variable C allows stable coverage over the CW end of the band. The oscillator is even stable enough to key if desired.
PS: To support this channel please start your Amazon Shopping here (no extra cost to you) https://www.amazon.com/?&_encoding=UTF8&tag=v0108-20&linkCode=ur2&linkId=76822b913d6201ba868f1e9c3c326184&camp=1789&creative=9325
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https://www.youtube.com/watch?v=gu5F90ivQMI
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Created
1 year ago
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THE T
the-thousand-hour-radio-a-low-drain-am
A TRF AM broadcast receiver using the popular ZN414 / MK484 single chip radio IC. Performance is surprisingly good for its 2.5mA current draw. The video gives a demonstration of its performance and description of the circuit.
The Cool386 website referred to is at: http://members.iinet.net.au/~cool386/
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https://www.youtube.com/watch?v=lJehuHHaOv8
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Created
1 year ago
Content Type
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video/mp4
Controlling
VIDEO
"BEAC
beach-40-7-mhz-dsb-txcvr-pt-3-circuit
If you're having trouble finding a 7.2 MHz ceramic resonator (though see the comment under an earlier video), a wide range variable crystal oscillator can do the job.
This video describes the small modifications needed to make a wide range 'super VXO' for 7 MHz with a pulling range of over 50 kHz. The crystals needed - 7.122 & 7.159 MHz - are cheaply available as well. As with the first video you're encouraged to draw along for the circuit.
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https://www.youtube.com/watch?v=c-Zte_J7O1M
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Created
1 year ago
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video/mp4
Controlling
VIDEO
A SIM
a-simple-binaural-direct-conversion
Two ICs is all that's needed to make a simple binaural direct receiver. Making use of both your ears it's like tuning the HF bands in stereo.
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https://www.youtube.com/watch?v=_a8dVt0hK44
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Created
1 year ago
Content Type
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video/mp4
Controlling
VIDEO
EXAMP
examples-of-qrp-activity
Some examples of HF and VHF under 5 watt (or QRP) amateur radio activity, mainly to accompany talks to radio clubs. More details on QRP at http://home.alphalink.com.au/~parkerp/qrp.htm
PS: To support this channel please start your Amazon Shopping here (no extra cost to you) https://www.amazon.com/?&_encoding=UTF8&tag=v0108-20&linkCode=ur2&linkId=76822b913d6201ba868f1e9c3c326184&camp=1789&creative=9325
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https://www.youtube.com/watch?v=td7Phcug2-I
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Created
1 year ago
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video/mp4
Controlling
VIDEO
2020
2020-beru-contest-and-other-cw-dx
2 hours with a battery and T-vertical antenna in a park near home. Running a linear amp this time (~70w?). DX contacts made on 20, 30 & 40m.
PS: Like these videos? Wish to support this channel? If so please store this link to Amazon Shopping as a bookmark or favourite. https://www.amazon.com/s?k=amateur+radio&camp=1789&creative=9325&linkCode=ur2&linkId=459b07464cb38819b3376396431e47d3&tag=v0108-20&ref=as_li_qf_sp_sr_tl Then when you buy something I receive a small commission (at no extra cost to you). Or check my books page to see if any appeal. http://home.alphalink.com.au/~parkerp/vk3yebooks.htm
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https://www.youtube.com/watch?v=HRrfTZVg_Fc
Transaction
Created
1 year ago
Content Type
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video/mp4