Sweet little radio. Perfect for a youngster such as I was six decades ago to learn from & get into ham radio. I learned more from dear ol’ Elmer’s publications than any schooling. Modern Radio Labs was the best!
Here in the uk I built kits like this in the 50s and 60s . They were great fun and the hobby has kasted all my life . I still enjoy old valve recievers though . Nice video . Best wishes to you .
Hi Mike and Andrea. Elmer was a great resource for the "radio curious" among us. Simple, kitchen table projects. Always lovved his "Hints and Kinks" on the last few pages of the instruction manual. Stay well.
the low voices station are SSB band , without VCO methode circuit , your receiver can hear all very top and is very stabil , its a very good receiver , thanks for watching
I never heard of MRL before. Well, this set is very similar to the ones written up by Alfred Morgan in "The Boy Electrician" and "The Boy's book(s) of radio and electronics". The use of a 1.4 volt power tube makes sense as they were the last of the battery tubes to become unobtainum. Note that you can use the 3volt battery tubes as well, since their filaments could be wired in parallel to run at 1.5 volts. So one can use 1Q5GT, 1C5Gt, 3Q5Gt, 3Q4, 3V4, 3S4. Also rf pentode types 1S4, 1T4, 1U4, 1U5. There are also Loctal based tubes as well. He recommends 6.3v tubes, but while the power types (6K6, 6G6, 6F6, 6V6 and 6L6) will work, the 6v RF pentodes (6SK7, 6SS7, 6SJ7, 6AU6, 6BA6, 6SC7, 6K7, 6J7, 6SD7, 6C6, 6D6) are a better choice (but you have to connect G3 to the cathode). Note some of these tubes are Octal base, some are 6 prong, some are 7 pin miniatures. 12v tubes are also OK, but you need a 12v filament transformer, 6v tubes can be run off of 4 series connected flashlight batteries, or "Lantern" battery. Usually the pentode tubes controlled regeneration by varying the voltage on G2 with a pot, but that puts a constant drain on the battery so the use of feedback control makes sense. A variable capacitor (150pf) from the tickler coil to ground works as well as the pot with capacitor to ground. There should be an RF choke in series with the headphones (about 1-3 mh), regeneration may be hard to control without it.
Well that guy was telling a story about when he found the magazine. They've got a pretty big website but I don't think they print the magazine anymore.
I built a sort of twinplex with a #19 dual triode tube but the plug in coil set I had only catches the top of the AM BCB. I built my first one tube radio as a young teen with a 201A tube that I was given and junkbox parts. I used all prewar parts on the twinplex except of course the chassis parts.
My friend had one but KDKA overpowered most of the bands making Short wave reception impossible. That was the main reason I built the greymark 2 band radio instead I made mine a three band because I used the phono input for an FM tuner. I could have built the all band kit because I didn't live near KDKAs tower.I didn't want to take the chance. the plug in coils is a good way of picking which bands you want to receive . I know the greymark superheterodyne would take more coils but switching coils would need a different rotary' switch. 73
Хороший приёмничек для начинающих. Один интересный факт - один мой знакомый, 70 лет, рассказывал, что в его деревне в 1952 году, ещё в Советском Союзе, один мужик изготовил себе радиоприёмник, но не такого типа, а простейший детекторный, так вот, за это его арестовали и увезли, больше его никто никогда не видел. Вот такие были времена.
Mike, thanks for the great video,that receiver is sounding very good , i built one earlier but using only the schematic but it didnt work ! i am now building it just like the layout maybe i will have better luck this time !, thanks again , Jerry K9UT
LOLOLOL!!!! The referenced "clip from 1936 shows a radio with 10 vacuum tubes" was in fact a clip from a "Star Trek" TV episode where Spock supposedly built something out of junk parts. I guess they had gotten caught in a "time warp" or something.
Fantastic radio. And nice demonstration of the 1 valve radio. Those components have shrunk somewhat nowadays, give me a valve any day. No offence to the marvellous tech of today.
Yes, it sure was. It was a cover of Blood On The Rooftops, but I forget which band played it. I just held the microphone to the speaker while playing a TH-cam video. It's one of my favorite songs.
@@michaelsimpson5417 It's one of my favourite songs too. About your radio, I had a HAC regenerative receiver kit as a kid, they were advertised in Practical Wireless magazine in England back in the 60's and early 70's, it used a single triode and those Denco plugin coils if you remember those? I still find it immensely rewarding getting such good results from such a simple set, plus you get more involved with both hands on the knobs !!
Sweet little radio. Perfect for a youngster such as I was six decades ago to learn from & get into ham radio. I learned more from dear ol’ Elmer’s publications than any schooling. Modern Radio Labs was the best!
Neat little radio, sounds great with your audio amp. Thanks for sharing.
Here in the uk I built kits like this in the 50s and 60s . They were great fun and the hobby has kasted all my life . I still enjoy old valve recievers though . Nice video . Best wishes to you .
Hi Mike and Andrea. Elmer was a great resource for the "radio curious" among us. Simple, kitchen table projects. Always lovved his "Hints and Kinks" on the last few pages of the instruction manual. Stay well.
Hi Karl! I wish he was still around. I have a thousand questions to ask him.
Me and my dad built re-gen SW radio in 70's ,worked really well
the low voices station are SSB band , without VCO methode circuit , your receiver can hear all very top and is very stabil , its a very good receiver , thanks for watching
I never knew you had a TH-cam channel. I'm glad I found it. Another regen related channel to watch!
I never heard of MRL before. Well, this set is very similar to the ones written up by Alfred Morgan in "The Boy Electrician" and "The Boy's book(s) of radio and electronics".
The use of a 1.4 volt power tube makes sense as they were the last of the battery tubes to become unobtainum. Note that you can use the 3volt battery tubes as well, since their filaments could be wired in parallel to run at 1.5 volts. So one can use 1Q5GT, 1C5Gt, 3Q5Gt, 3Q4, 3V4, 3S4. Also rf pentode types 1S4, 1T4, 1U4, 1U5. There are also Loctal based tubes as well. He recommends 6.3v tubes, but while the power types (6K6, 6G6, 6F6, 6V6 and 6L6) will work, the 6v RF pentodes (6SK7, 6SS7, 6SJ7, 6AU6, 6BA6, 6SC7, 6K7, 6J7, 6SD7, 6C6, 6D6) are a better choice (but you have to connect G3 to the cathode). Note some of these tubes are Octal base, some are 6 prong, some are 7 pin miniatures. 12v tubes are also OK, but you need a 12v filament transformer, 6v tubes can be run off of 4 series connected flashlight batteries, or "Lantern" battery.
Usually the pentode tubes controlled regeneration by varying the voltage on G2 with a pot, but that puts a constant drain on the battery so the use of feedback control makes sense. A variable capacitor (150pf) from the tickler coil to ground works as well as the pot with capacitor to ground. There should be an RF choke in series with the headphones (about 1-3 mh), regeneration may be hard to control without it.
I didn't know Nuts & Volts was still being published. That aside, this is a great receiver. Love that tuning sound.
Well that guy was telling a story about when he found the magazine. They've got a pretty big website but I don't think they print the magazine anymore.
I have a subscription to Nuts & Volts. It's hard to find on the magazine rack at the bookstore, but it's hard to find a bookstore, for that matter 😉
Thanks for showing my pictures in your Video! It's always nice to see you upload.
I went to look up your last name for the video and found that your actual name is "Mighty Max."
@@michaelsimpson5417 Well my grandmother always used to call me that... so now that's my email! :)
I built a sort of twinplex with a #19 dual triode tube but the plug in coil set I had only catches the top of the AM BCB. I built my first one tube radio as a young teen with a 201A tube that I was given and junkbox parts. I used all prewar parts on the twinplex except of course the chassis parts.
Thank you for posting Mike. Grew up building these radios.
Great little radio! Reminds me of playing with the radiola 3 or crosley 51😊
Very nice video, I enjoy your website and now I can watch your videos, gotta love a radio that squeals.....!
Thanks, Perry!
Interesant. Voi încerca să construiesc unul. Interesting. I will try to build one.
Im sure i heard some FT8 around 8.07 nice wee radio, thanks for sharing
It looks very interesting . I want to build one. Thanks for sharing.
My friend had one but KDKA overpowered most of the bands making Short wave reception impossible. That was the main reason I built the greymark 2 band radio instead I made mine a three band because I used the phono input for an FM tuner. I could have built the all band kit because I didn't live near KDKAs tower.I didn't want to take the chance. the plug in coils is a good way of picking which bands you want to receive . I know the greymark superheterodyne would take more coils but switching coils would need a different rotary' switch. 73
Now that was good stuff, ty.
Хороший приёмничек для начинающих. Один интересный факт - один мой знакомый, 70 лет, рассказывал, что в его деревне в 1952 году, ещё в Советском Союзе, один мужик изготовил себе радиоприёмник, но не такого типа, а простейший детекторный, так вот, за это его арестовали и увезли, больше его никто никогда не видел. Вот такие были времена.
Soon coming here as well.
Puro arte. Buen trabajo.👍
Super radio!
Mike, thanks for the great video,that receiver is sounding very good , i built one earlier but using only the schematic but it didnt work ! i am now building it just like the layout maybe i will have better luck this time !, thanks again , Jerry K9UT
Jerry, if you are winding your own coil, make sure the wires go to the proper pins. See this:
www.analogdial.com/MRLClone/MRLClone4.htm
I believe if you adjust the regen to just past the breaking point you can listen in on single sideband ham communications.
Nice video and info . We at inkits looking to building such kits . Best of 73s de VU3SUA FROM India
LOLOLOL!!!! The referenced "clip from 1936 shows a radio with 10 vacuum tubes" was in fact a clip from a "Star Trek" TV episode where Spock supposedly built something out of junk parts. I guess they had gotten caught in a "time warp" or something.
Yeah, they had gone into the past and Spock built some gadget to try to communicate with the ship. (I think) When it blew up I busted out laughing.
Thanks. Brazil 👏👏
Fantastic radio. And nice demonstration of the 1 valve radio. Those components have shrunk somewhat nowadays, give me a valve any day. No offence to the marvellous tech of today.
In radios DC stands for direct conversion - as opposed to a superhet
Hi Gareth, not in this case. This is a regen radio.
@@michaelsimpson5417 Oh yes, my mistake.
I would love to understand how this works.
That sounded like an excerpt from a version of Blood On The Rooftops at the end?
Yes, it sure was. It was a cover of Blood On The Rooftops, but I forget which band played it. I just held the microphone to the speaker while playing a TH-cam video. It's one of my favorite songs.
@@michaelsimpson5417 It's one of my favourite songs too. About your radio, I had a HAC regenerative receiver kit as a kid, they were advertised in Practical Wireless magazine in England back in the 60's and early 70's, it used a single triode and those Denco plugin coils if you remember those? I still find it immensely rewarding getting such good results from such a simple set, plus you get more involved with both hands on the knobs !!
How do you build the tuning capacitor with the Bakelite or wooden rod
Here's how I did it:
analogdial.com/MRLClone/MRLClone2.htm
I got a detector crystal from MRL but it is still in the little green box it came in.
There is one in a little green box here, on Page 2
www.analogdial.com/Osterhoudt/Osterhoudt1.html
Wow! Sounds like no agc circuit .
LOL!
Show us a schematic!!!
Check the link under the video for the entire handbook with instructions.
Yporfavor en español