What a brilliant refresher for an OM who's fast becoming an Old Man! When I was first fiddling with electronics in the 70s reflex circuits were common in simple receiver designs. But as semiconductors got cheaper - and the ubiquitous LM386 etc audio amps appeared, then reflex designs took a back seat. So thank you Peter for rekindling the design - and hopefully introducing it to a new audience as well as re-introducing it to other old hams like me. 73 / 72 G4MAD G-QRP 16290
👍Nice one Peter, thank you. I built the 10 minute TX mentioned here and had been wondering about a simple RX to go with it to make a transciever. Looks like this fits the bill. Not sure if I could put up with that sidetone at the end though 😆.
Hello Peter I just want to say that your teachings are the best ever because of you I am able to understand a lot about this amazing hobby just want to let you know that I am from hastings in new Zealand
Hey Peter ....thanks for the QSO on the single transistor rig! Mine was 400mW and my CW was really bad...partly keys...partly 30 years not having done it but we got there!!! I purchased your handbook for some light reading !!! It is really good, just what I needed to work out the "lay of the land" in modern times! 73 George VK2AOE
Thanks George. I've left a link to a video on the thread on your page. I was running 10w from a uBitx. The single transistor rig wouldn't have made it on 80m (40m is far better for the distance between us).
A BC548 exhibits useful gain from DC to 20MHz and it will amplify a complex waveform with energy at 7MHz and audio *at the same time*. Simple, effective. The inductor on the collector is not labeled, assume it is 1mH, same as the one on the base for the audio path. Reviving an old technique from the valve days, when a tube was hard to come by!
Too complicated for my basic electronics knowledge to understand Peter. Lol FYI, I picked up your ebook and paperback from Amazon.👍🍺🤓🇦🇺 "Australian Ham Radio Handbook"
It is definitely possible to build a one transistor receiver with no other active devices -- no RF from local oscillator, no AF amplification. See my ET-2 project on the SolderSmoke blog. I have videos in which you can listen to the receiver (with the mic taped to one of the headphones -- no outside AF amplification). Three cheers for N0WVA. Farhan VU2ESE listened to this receiver in my shack. His reaction: "Wow, you could really make contacts with this." Indeed, I made 20 contacts with it. This is a true regen, with a single FET serving as: RF amplifier, oscillator, detector and AF amp. 73 Bill N2CQR
What a brilliant refresher for an OM who's fast becoming an Old Man!
When I was first fiddling with electronics in the 70s reflex circuits were common in simple receiver designs. But as semiconductors got cheaper - and the ubiquitous LM386 etc audio amps appeared, then reflex designs took a back seat.
So thank you Peter for rekindling the design - and hopefully introducing it to a new audience as well as re-introducing it to other old hams like me.
73 / 72
G4MAD G-QRP 16290
👍Nice one Peter, thank you. I built the 10 minute TX mentioned here and had been wondering about a simple RX to go with it to make a transciever. Looks like this fits the bill. Not sure if I could put up with that sidetone at the end though 😆.
Hello Peter I just want to say that your teachings are the best ever because of you I am able to understand a lot about this amazing hobby just want to let you know that I am from hastings in new Zealand
Hey Peter ....thanks for the QSO on the single transistor rig! Mine was 400mW and my CW was really bad...partly keys...partly 30 years not having done it but we got there!!! I purchased your handbook for some light reading !!! It is really good, just what I needed to work out the "lay of the land" in modern times!
73 George VK2AOE
Thanks George. I've left a link to a video on the thread on your page. I was running 10w from a uBitx. The single transistor rig wouldn't have made it on 80m (40m is far better for the distance between us).
Congrats Peter , another nice lil rig ! I like your work ! 73 , K9UT
Love the simple circuits!!
Very nice build!
Good Stuff. Hello from Sydney.
Excellent
This is awesome
A BC548 exhibits useful gain from DC to 20MHz and it will amplify a complex waveform with energy at 7MHz and audio *at the same time*. Simple, effective. The inductor on the collector is not labeled, assume it is 1mH, same as the one on the base for the audio path. Reviving an old technique from the valve days, when a tube was hard to come by!
Too complicated for my basic electronics knowledge to understand Peter. Lol
FYI, I picked up your ebook and paperback from Amazon.👍🍺🤓🇦🇺
"Australian Ham Radio Handbook"
I have a made-by-myself 1 transistor 3 volt low impedance radio accualy im making one now
Please do not start making youtube faces.
It is definitely possible to build a one transistor receiver with no other active devices -- no RF from local oscillator, no AF amplification. See my ET-2 project on the SolderSmoke blog. I have videos in which you can listen to the receiver (with the mic taped to one of the headphones -- no outside AF amplification). Three cheers for N0WVA. Farhan VU2ESE listened to this receiver in my shack. His reaction: "Wow, you could really make contacts with this." Indeed, I made 20 contacts with it. This is a true regen, with a single FET serving as: RF amplifier, oscillator, detector and AF amp. 73 Bill N2CQR