This video reminds me of the younger days of mine, which was about 60 years ago. I, also, used to be a 'Radio Boy' , and spent much time studying, copying and making a small project like 'Two Transistor Reflex Radio ', 'a 807 QRP transmitter', etc. A Weller soldering gun and Simpson multimeter were Dream Machines at that time. Thanks you for reminding me the old good days.
I didn't stand a chance. I was an only child and had 3 radio Elmers...The girl next door's dad was a ham, my cousin was a TV Radio Repair guy who self educated and did the correspondence courses on electronics and was by all accounts, a radio engineer, and my shop teacher who was an antique radio nut and an EE.
Oh and the College in town just up the street was St. Lawrence University and they let me into the library. SLU was home of one of the the first AM Radio Stations in a College. In the early 1920s, the SLU physics department launched WCAD in a pig barn on campus. And when I was in high school, I would go up and look through their fabulous library Radio History collection.
I was bread boarding tube circuits as a kid. Someone gave me a bunch of old tubes from the 30's and 40s', and I had lots of parts from old TV's that I found waiting by the curb for the trashmen. I built a two tube wireless transmitter with a 6F6G modulated by another 6F6G. IIRC, I never had any problems with the 2N107 oscillating in the BCB, I used them as regenerative detectors in fact. Then again, hobby parts suppliers would buy surplus 'house marked' Ge transistors, and sell them as 2N107s, even though they might have been 2N404's, or something else. Also the CK722 was a lower freq rated device then the 2N107, IIRC. (It was also a hell of a lot LEAKIER). I might have never actually had a REAL General Electric 2N107, just units bagged and sold by RS, PolyPacks, or Lafayette Radio AS 2N107's.
I think that the CK722 was really early and being that it was Raytheon, it probably was a part that was left over from military graded devices. Still good , but not a select part. So that was a clever way to sell them. The 2N107 was similarly a part that did not meet higher specs by GE. Good to hear that the 107 would oscillate at BCB. I have a few vintage Germaniums to try in the circuit!
Hey, I remember seeing PolyPaks in the classifieds in the back of the electronics magazines. Like someone said, often the transistors that were in those cut-rate consumer stuff were sub-standard in one way or the other. The good 2N107 transistors from GE were expensive. I bought one, it came in a plastic vial. I still have it stuck in a drawer.
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Amigo Mike, me has echo llorar... GRACIAS. 73,s - ea5bii - José Luis
Let’s build all the circuits in your spiral notebook! A year after your notebook, I was 13, built a preamp and power amp from the back of the RCA tube manual. I didn’t understand the circuits very much at all, but they worked, and still do. But except for a few little projects from Popular Electronics, I didn’t build any more; never understood radio back then, had no guidance. Wish I had learned then, but it’s fun learning now.
I have a copy of that book printed several years prior to Radio Shack acquiring publication rights. I built a tube version of the transmitter called a "phono oscillator" in the early 60s. It had a 35W4 and a 50C5 and a honking power resistor to complete the remaining filament voltage drop.
Yes, I forgot about the Allied- Radio Shack deal! A phono oscillator classic widowmaker! I remember a radio repair guy friend of my dads who was, lets just say "inebriated" much of the time, draw out by memory on the kitchen table, a pictorial schematic of what you are describing but with a 12SA7 and a 35Z5 and yes a big resistor.
Yes giving it some air. I bought that Washburn in college because a nice looking girl played one - ha. You know who plays one? Cyndi Lauper. I saw her a couple of years ago and she is really good.
That circuit is simple, and it picks up FM stations pretty well if I remember, and it drives headphones. But with B+ on the phones, folks get nervous. I built some nice ones with the 6BQ7/6BZ7 and a 6AQ5 driving a speaker for the Aircraft Band and they really worked great.
Wow. I am not sure about that. I copied them from all of the books and they have been grouped and published endlessly online. Hey they don't work anyway - ask anyone.
What about the Armstrong Phasing Modulator for the FM Broadcast Band which would use a MC1496 for the DSB modulator portion of the Armstrong Phasing Modulator.
El.cev pronađena 1948.godine kad sam ja rođen a tranzistor 1952.god kad je rođena moja žena. Da li je to istina.pozdrav od Yu 1 Qg milan i cooking recepti.
This video reminds me of the younger days of mine, which was about 60 years ago. I, also, used to be a 'Radio Boy' , and spent much time studying, copying and making a small project like 'Two Transistor Reflex Radio ', 'a 807 QRP transmitter', etc. A Weller soldering gun and Simpson multimeter were Dream Machines at that time. Thanks you for reminding me the old good days.
Wonderful! Thanks for watching.
I love your notes with both tube and transistor circuits. That's real electronics!
Love the history of your youth ,You where more advanced than i was , i was doing a crystal set .
I didn't stand a chance. I was an only child and had 3 radio Elmers...The girl next door's dad was a ham, my cousin was a TV Radio Repair guy who self educated and did the correspondence courses on electronics and was by all accounts, a radio engineer, and my shop teacher who was an antique radio nut and an EE.
Oh and the College in town just up the street was St. Lawrence University and they let me into the library. SLU was home of one of the the first AM Radio Stations in a College. In the early 1920s, the SLU physics department launched WCAD in a pig barn on campus. And when I was in high school, I would go up and look through their fabulous library Radio History collection.
Wow, tough early life. ;-)
I was bread boarding tube circuits as a kid. Someone gave me a bunch of old tubes from the 30's and 40s', and I had lots of parts from old TV's that I found waiting by the curb for the trashmen. I built a two tube wireless transmitter with a 6F6G modulated by another 6F6G.
IIRC, I never had any problems with the 2N107 oscillating in the BCB, I used them as regenerative detectors in fact. Then again, hobby parts suppliers would buy surplus 'house marked' Ge transistors, and sell them as 2N107s, even though they might have been 2N404's, or something else. Also the CK722 was a lower freq rated device then the 2N107, IIRC. (It was also a hell of a lot LEAKIER). I might have never actually had a REAL General Electric 2N107, just units bagged and sold by RS, PolyPacks, or Lafayette Radio AS 2N107's.
I think that the CK722 was really early and being that it was Raytheon, it probably was a part that was left over from military graded devices. Still good , but not a select part. So that was a clever way to sell them. The 2N107 was similarly a part that did not meet higher specs by GE. Good to hear that the 107 would oscillate at BCB. I have a few vintage Germaniums to try in the circuit!
Hey, I remember seeing PolyPaks in the classifieds in the back of the electronics magazines. Like someone said, often the transistors that were in those cut-rate consumer stuff were sub-standard in one way or the other. The good 2N107 transistors from GE were expensive. I bought one, it came in a plastic vial. I still have it stuck in a drawer.
Amigo Mike, me has echo llorar... GRACIAS. 73,s - ea5bii - José Luis
i love these old books
These things are great to pick up at book sales and pour through.
Let’s build all the circuits in your spiral notebook!
A year after your notebook, I was 13, built a preamp and power amp from the back of the RCA tube manual. I didn’t understand the circuits very much at all, but they worked, and still do. But except for a few little projects from Popular Electronics, I didn’t build any more; never understood radio back then, had no guidance. Wish I had learned then, but it’s fun learning now.
Hi. In my 15 I have got my lu7amq amateur callsign!. I have some nice remembers of that times! Lets make this broadcaster to celebrate! 73's Mike!
73's Julian and yes let's see this thing work!
I have a copy of that book printed several years prior to Radio Shack acquiring publication rights. I built a tube version of the transmitter called a "phono oscillator" in the early 60s. It had a 35W4 and a 50C5 and a honking power resistor to complete the remaining filament voltage drop.
Yes, I forgot about the Allied- Radio Shack deal! A phono oscillator classic widowmaker! I remember a radio repair guy friend of my dads who was, lets just say "inebriated" much of the time, draw out by memory on the kitchen table, a pictorial schematic of what you are describing but with a 12SA7 and a 35Z5 and yes a big resistor.
I still have that Radio Shack book.
A classic that Radio Shack inherited from the Old Allied Radio company. Mine is all marked up.
I hope one day you will tell us about electronic books, I want to read it... like you did sir.
¡Gracias Ruis and Luis! Espero que hagas muchos proyectos de radio para niños divertidos a partir de los libros antiguos.
Nice dulcimer!
Yes giving it some air. I bought that Washburn in college because a nice looking girl played one - ha. You know who plays one? Cyndi Lauper. I saw her a couple of years ago and she is really good.
Grande mestre!
Would be good to hear that VHF Super Regen in action Mike.
That circuit is simple, and it picks up FM stations pretty well if I remember, and it drives headphones. But with B+ on the phones, folks get nervous. I built some nice ones with the 6BQ7/6BZ7 and a 6AQ5 driving a speaker for the Aircraft Band and they really worked great.
Will the fidelity be good enough to broadcast songs to a restored tube radio? If not, can it be improved?
I don't know! We shall see if it performs.
Dear Mike
Please publish your schematics collection.
Thanks,
Phil
:-)
Wow. I am not sure about that. I copied them from all of the books and they have been grouped and published endlessly online. Hey they don't work anyway - ask anyone.
Age 15? He’s got “The Knack” !
Yeah and I remember bringing a girl up to my "shack" - that did not go well.
@@MIKROWAVE1 Might have helped if you had painted it pink!
What about the Armstrong Phasing Modulator for the FM Broadcast Band which would use a MC1496 for the DSB modulator portion of the Armstrong Phasing Modulator.
El.cev pronađena 1948.godine kad sam ja rođen a tranzistor 1952.god kad je rođena moja žena. Da li je to istina.pozdrav od Yu 1 Qg milan i cooking recepti.
Milan Da, u pravu si, mislim za bipolarni tranzistor.
Brings back memories of six grade electronics class
The best!