When this dear old timer explained the regeneration it was like drinking a glass of water at body temperature. Went straight down without any discomfort at all. Wonderful.
This is one of my favorites, I liked the explanation of the schematic on the first radio, learned much. The home-built power supply is impressive, looks professional. Thank you for another great video!
As a school kid back in the 1960s I had a lot of fun with one tube radios. Very low budget, coils wound on cardboard tubes, parts scrounged wherever. I built it and it worked! so satisfying. I'd like to re visit the old tech once more but unfortunately there's no AM broadcasting in Malaysia now.
Great vide. It's nice to see a Weller Soldering Gun. I have had mine from when I was 12 years old. I am now 66 and it still works ok. Mind you it has had the trigger switch replaced many times. I used to be a TV Radio Engineer and it was used every working day. Cheers from old George in the UK 🇬🇧👍🤠
Thanks for all the information you provide in your videos. I'm beginning to understand the flow of tube amplifiers and radios more with every video i see. Keep being yourself i love the fun you have making these videos. Greetings from Holland 👍
You make the best vids in the hobby 'slinger! You can have a thousand old radios, but hearing that next one fire up after of may years of being silent never gets old.
Hey Ron happy to see one of your videos you're very good at what you do hope to see more of your videos from One tech to another I hope you're keeping safe from the virus got some radios to work on myself keep up the good work always enjoy your videos
Glad you talked about a variable grid leak gizmo. I have tried to get a homebrew single tube radio for many years and yesterday I thought I would try again. I had this variable thing that had the antenna hooked to one side and no leads on the other side. I decided the only way to see what this is is to remove it. BINGO - a variable grid leak and since I had just watched your video I knew what it was. Thank you. I will try to follow either one of your schmatics to hopefully get closer to get it working. I unfortunately do not have a variometer.
there is a radio station in paris france broadcasting 30s/40s non-stop 24/7 i listen over a korean app i use on android, you could rig it to send the app's audio from the tablet headphone jack over to a low power AM transmitter and that would be ideal for your work table radio demonstations after the repairs are complete. Your fine projects deserve better than today's commercial AM junk.
I think I can throw light on the 'mystery potentiometer' If the owner aspired to adding second triode tuning stage (which would greatly improve selectivity & gain), there would be a lot of oscillation, even without applying regen. Adjusting this potentiometer would go some way to controlling this. I built a 3 tube set, which had two tuning stages, just to prove how tricky such sets were to operate & it certainly was a demon to 'drive' The neutrodyne was one solution (again tricky to drive), but once screen grid tubes arrived on the scene, listening in became much easier!
I've built several one tube regens. I've built two versions of the one tube regen by A.P. Morgan in the 'boy electrician'. The first one as a teenager, using off the shelf parts from Radio Shack and Lafayette Radio, the 1H4G was found at Barry's Electronics in NYC's radio row area. I later built another one using the exact parts that Morgan did, including the strange 270 degree rotation National Radio tuning capacitor, vernier dial, breadboard base mount tube sockets, and Hammarlund plug in coils. The third receiver was the 'twinplex' described in a Lindsay book using a type 19 tube. That is actually a two tube set as the type 19 is a dual triode. Here I used as many period correct parts as possible, including a Hammarlund tuning capacitor, and a National vernier dial. You should run the radio at 22-45 volts and the amplifier at 100 volts if you have a dual supply there.
I made at home an model whith two 1 s 4 tube ,wonderfull and i work an superheterodyne with 5 tubes series d , performance radio at my home in Romania.verry ,verry nice !
gee, i wonder if that radio played the Charles Lindbergh 1927 news after becoming the first person to fly solo and nonstop across the Atlantic Ocean in his monoplane, Spirit of St. Louis and stuff like that? thanks another great video...:) oh, and when you work on a cat whisker radio your cat heads for the hills...:/
I have a radio very similar to the first one. Mine was made by Paragon. It is an RD5. I show it on my radios website. Use my name to search for the site. The radio operates exactly like the one you have. It squeals like a pig until adjusted. :)
Thanks for great, detailed video's. Is there, or can there be, a video on how to construct a power supply unit like yours? It certainly looks like the most useful way to power these old radios.
England. 50 years ago I was into valve amplifiers. Mullard 20w 15 ohm .05% distortion, I built a stereo pair and I still use it. I have numerous other transistor (Bailey) and valve that I have built, but the old lady has never been bettered. Mullard El34 valves. I did get 410V across my nose once whilst tinkering underneath the beast. It was too heavy for one person and around 4 ft long. I was lying on my back and accidentally touched an HT connection with a soldering iron. I also built two Mullard 3 valve preamps. With it going full chat you can turn off the room heater. I love your videos but wonder what will happen to the beast when I snuff it. Happy New Year and all the best.
Brilliant. I think I said in your horn speaker amplifier video that it would be ideal with a single tube regenerative radio. First time I've seen regeneration done by tuning the anode and relying on anode-grid capacitative feedback. Most regenerative circuits of the early-mid twenties would inductively couple the anode and tuning coils. If they used a variometer the outer coil would be the grid tuning and the rotating inner coil would be for regenerative feedback. In those days they mainly used low frequencies. The first radio you showed went from 500KHz to over 5MHz which would be quite high frequency back then as a lot went off below 500KHz. With these low frequencies together with the low gain tubes of the time the tubes didn't show much tendency to become unstable because of capacitative feedback. Tuned grid-tuned anode rf amplifier stages were popular as well. It's only at higher frequencies that capacitative feedback starts causing problems.
HI Ron ,thank you for your interesting videos I always look forward to leaning from your many skills ,I have to catch up I have been away for a while ,so to my delight I have 3 videos to study ,much appreciated
I heard it, backed up a little, heard it again. I have no idea who/what that was but it definitely did not sound like it came from Ron or from another person in the room. It sounded "unnatural".
One Tube Radio explanation is very interesting. I have to add some of my understandings in your explanations. 1- Two switches have been used on antenna coil to reduce the step changes in inductance for fine tunning. Had one switch been used, it would have given larger step variations in the coil, resulting difficulty in fine tunning. 2- The variable output from the cathode, in my opinion, is for the tube to work as a diode detector without B+ supply to plate and may be used for headphones without Amplifier. These are just my understandings that may be wrong, please.
The regeneration control of the second radio didn't work very well. Originally the radio would have used a set of headphones as the anode load which would be in series with the regeneration coil. In this case the load was a 5K resistor to provide a DC path and the speaker amplifier. Could the resistor/amplifier combination offer a higher impedance load to radio frequencies than headphones thus reducing the effectiveness of the regeneration coil. Connecting a small capacitor across the headphone terminals would show if this was the case.
I would think that 500R pot on the second radio was definitely there to balance out the B battery voltage, which might actually have had a result on very early tubes with a wonky filament, as then you could choose the cathode section in use somewhat. But yes simply not using it is not going to make a difference, though in very weak signal areas it might make a difference in getting a signal that is out of the noise, compared to one where the set just oscillates.
I repair old radio's for a hobby. I have nowhere near close to the knowledge that Glasslinger has, but I do enjoy it a lot mainly 60's radio's. I also have a Philips 2514 with bakelite speaker year 1928. I never made an attempt to restore it because I just don't have the knowledge. It is that I live on the other side of the world otherways I would love to give this radio to Glasslinger, if he promisses to repair it and make a video about it. I would really love that! But that is very unlikely going to happen because of the distance.
please,please,please Glasslinger, can you find the time to make a video. About the Valve Characteristics, measuring device that we see you using now and again.Thankyou.
I am not sure that the tube on the second radio is healthy or not, I look at the white looking top on it and wonder if that is due to lost vacuum or some internal coating, but if that tube have lost vacuum it may be the reason the regen tuning and audio is poor. would be fun to know
An Internet address being spoken from a 1920’s radio ? Most homes didn’t have a phone or electricity in the 1920’s. 100 years on…we have automatic flushing toilets…they had outhouses !
It would be amazing if I ever had a chance to meet you and work with you on a project! You could teach much more than anyone could ever learn in school.
Looking at the schematic I was surprised to see that the B+ plate current flows through the headphones. An external amplifier connected to the headphone jack would have to provide a path for the plate current and yet not be affected by the presence of B+ voltage at it's input'
When building an auxilliary amp to connect to these early sets, provision should be made to accomodate the B+ voltage. A 10K resistor across the input terminals works fine.
Was at the crane estate in Ipswich Ma yesterday, and the docent placed his smartphone next to the intercom box for size and technology. Amazing he said it connected to every building on the estate, would have loved to see the switching apparatus.
A resistor and capacitor can be used to isolate the B+ from the headphones if it is a problem. Most headphones will work fine with a few milliamps of DC through them but ultra sensitive phones can "lock up" with DC bias.
Wonderful! What was done to improve the first radio? Would be nice to s.how the variameter coil is wired. Also s.how the _mystery potentiometer_ is connected.
As always, a great video. I have a question. NASA has for some time now been trying to invent technologies for exploring the surface of Venus, where lead flows naturally. That are having difficult coming up with a viable radio transmitter that lasts longer than a few minutes. Do you think that some type of vacuum tube technology could be designed to operate at 900 degrees from temperature resistant materials? This is more of a brain exercise because NASA would never do something cheaply.
This is stretched #14 copper buss bar. By stretching it, it becomes straight and rigid. The black covering is black shrink tubing. In the old days they used varnish soaked woven cotton sleeve but that is no longer available.
The tube is the detector. The bias is such that it conducts more on positive half cycled of RF than negative. The RF is filtered simply by the headphones or speaker not responding to high frequencies. No extra capacitor is needed.
It would be a cleaner design if all the power, RF, and audio connections were on the back of the radio. Still, pretty cool to see how radio was like 100 years ago. My Great-Grandparents could have had a very similar radio. WNAX, here in South Dakota (our first radio station) began in 1922 ? I think… It’s very possible they listened to WNAX on that style of radio, or a crystal set…who knows.
When this dear old timer explained the regeneration it was like drinking a glass of water at body temperature. Went straight down without any discomfort at all. Wonderful.
This is one of my favorites, I liked the explanation of the schematic on the first radio, learned much. The home-built power supply is impressive, looks professional. Thank you for another great video!
As a school kid back in the 1960s I had a lot of fun with one tube radios. Very low budget, coils wound on cardboard tubes, parts scrounged wherever. I built it and it worked! so satisfying. I'd like to re visit the old tech once more but unfortunately there's no AM broadcasting in Malaysia now.
Same here. Then you´ll need to build a small AM transmitter and plug it into a conventional radio :-D
maybe someone should step up and change that? even if you never get a listener it would be cool to have your own little pirate radio station going
You ought to be able to pick up AM stations from other countries. Imagine it, no local interference.
Ron there is no one quite like you on YT showing very early radio design. Thanks for posting it.
LOVE IT! My 1st shortwave radio was a regen. Tuning a regen is an art in itself....
Man I would love to spend a day with you the Knowledge that you could teach
Yup, spending an afternoon with this guy would be a treasure! I would try to learn everything I could from him.
Where the phrase "they just dont make em like they used to" really applies.
Great vide. It's nice to see a Weller Soldering Gun. I have had mine from when I was 12 years old. I am now 66 and it still works ok. Mind you it has had the trigger switch replaced many times. I used to be a TV Radio Engineer and it was used every working day. Cheers from old George in the UK 🇬🇧👍🤠
Thanks for all the information you provide in your videos. I'm beginning to understand the flow of tube amplifiers and radios more with every video i see. Keep being yourself i love the fun you have making these videos. Greetings from Holland 👍
You make the best vids in the hobby 'slinger! You can have a thousand old radios, but hearing that next one fire up after of may years of being silent never gets old.
Really cool. Been into old radio's as a hobby for years. It's always a lot of fun getting them running again.
Great job thanks for the video.
Greetings from Germany
This is some amazing history you got there. I love it so much. And what a great channel. Newcomer here.
Thank you, Ron. I always enjoy your videos. They’re always very informative. Cheers!
Hey Ron happy to see one of your videos you're very good at what you do hope to see more of your videos from One tech to another I hope you're keeping safe from the virus got some radios to work on myself keep up the good work always enjoy your videos
Fascinating stuff with those concentric rotating coils. And that grid leak adjustment...wow. Adjusting a spring to compress carbon? Very cool.
Great to see the variable carbon dust resistor!
Someday I would like to see a video on your power supply design. Looks intriguing
Brilliant Video Ron
Blessings From Birmingham England
Another incredible video.
You are amazing. Thank you for making these fascinating videos.
Thanks very enjoyable good to see you back.
Hi old metal it is good for listen radio Caroline !
Impressive work. I love how you simplify the circuit diagrams.
Thanks ✨✨
Glad you talked about a variable grid leak gizmo. I have tried to get a homebrew single tube radio for many years and yesterday I thought I would try again. I had this variable thing that had the antenna hooked to one side and no leads on the other side. I decided the only way to see what this is is to remove it. BINGO - a variable grid leak and since I had just watched your video I knew what it was. Thank you. I will try to follow either one of your schmatics to hopefully get closer to get it working. I unfortunately do not have a variometer.
there is a radio station in paris france broadcasting 30s/40s non-stop 24/7 i listen over a korean app i use on android, you could rig it to send the app's audio from the tablet headphone jack over to a low power AM transmitter and that would be ideal for your work table radio demonstations after the repairs are complete. Your fine projects deserve better than today's commercial AM junk.
fascinating how such a rudimentary circuit and inductance compliment catches the waves.
Love your videos Glasslinger.
nice construction and good demonstration!
I think I can throw light on the 'mystery potentiometer' If the owner aspired to adding second triode tuning stage (which would greatly improve selectivity & gain), there would be a lot of oscillation, even without applying regen. Adjusting this potentiometer would go some way to controlling this. I built a 3 tube set, which had two tuning stages, just to prove how tricky such sets were to operate & it certainly was a demon to 'drive' The neutrodyne was one solution (again tricky to drive), but once screen grid tubes arrived on the scene, listening in became much easier!
Really cool radio sets, specially the first one. Astonishing what one can do with just one tube !
I've built several one tube regens. I've built two versions of the one tube regen by A.P. Morgan in the 'boy electrician'. The first one as a teenager, using off the shelf parts from Radio Shack and Lafayette Radio, the 1H4G was found at Barry's Electronics in NYC's radio row area. I later built another one using the exact parts that Morgan did, including the strange 270 degree rotation National Radio tuning capacitor, vernier dial, breadboard base mount tube sockets, and Hammarlund plug in coils. The third receiver was the 'twinplex' described in a Lindsay book using a type 19 tube. That is actually a two tube set as the type 19 is a dual triode. Here I used as many period correct parts as possible, including a Hammarlund tuning capacitor, and a National vernier dial.
You should run the radio at 22-45 volts and the amplifier at 100 volts if you have a dual supply there.
Always glad to see an update from you Ron!
I made at home an model whith two 1 s 4 tube ,wonderfull and i work an superheterodyne with 5 tubes series d , performance radio at my home in Romania.verry ,verry nice !
The Phenix is a lovely looking radio..
Amazing the tube works at 22V!
gee, i wonder if that radio played the Charles Lindbergh 1927 news after becoming the first person to fly solo and nonstop across the Atlantic Ocean in his monoplane, Spirit of St. Louis and stuff like that? thanks another great video...:) oh, and when you work on a cat whisker radio your cat heads for the hills...:/
BTW, Lindbergh was the 83rd person to fly solo across the Atlantic.
@@gabevee3 thanks
Wow, great video. I love these old radios. Always good to see you. Hi to Miss Kitty. Take care 🙂
I have a radio very similar to the first one. Mine was made by Paragon. It is an RD5. I show it on my radios website. Use my name to search for the site. The radio operates exactly like the one you have. It squeals like a pig until adjusted. :)
Hey Ron, I'm looking forward to the Pilot Tv I really love to see you working on it
Thanks for great, detailed video's. Is there, or can there be, a video on how to construct a power supply unit like yours? It certainly looks like the most useful way to power these old radios.
Estaría muy bueno si armar una de estas radios con tubos modernos ....seria muy didáctico para los aficionados...exelente todos sus videos
England. 50 years ago I was into valve amplifiers. Mullard 20w 15 ohm .05% distortion, I built a stereo pair and I still use it. I have numerous other transistor (Bailey) and valve that I have built, but the old lady has never been bettered. Mullard El34 valves. I did get 410V across my nose once whilst tinkering underneath the beast. It was too heavy for one person and around 4 ft long. I was lying on my back and accidentally touched an HT connection with a soldering iron. I also built two Mullard 3 valve preamps. With it going full chat you can turn off the room heater. I love your videos but wonder what will happen to the beast when I snuff it. Happy New Year and all the best.
I love your story about the EI34 amp. Did you sketch a schematic you'd care to share? p.s. Im a Chesterian, living in Canada, pip pip
Alright, I needed a glasslinger fix !
Fantastic video!!!!! :D
This was excellent .
I have a crystal set using one of those tuning condensers from a Atwater kent they look the same
Excellent! Thank-you and God Bless.
Brilliant.
I think I said in your horn speaker amplifier video that it would be ideal with a single tube regenerative radio.
First time I've seen regeneration done by tuning the anode and relying on anode-grid capacitative feedback. Most regenerative circuits of the early-mid twenties would inductively couple the anode and tuning coils. If they used a variometer the outer coil would be the grid tuning and the rotating inner coil would be for regenerative feedback.
In those days they mainly used low frequencies. The first radio you showed went from 500KHz to over 5MHz which would be quite high frequency back then as a lot went off below 500KHz. With these low frequencies together with the low gain tubes of the time the tubes didn't show much tendency to become unstable because of capacitative feedback. Tuned grid-tuned anode rf amplifier stages were popular as well. It's only at higher frequencies that capacitative feedback starts causing problems.
HI Ron ,thank you for your interesting videos I always look forward to leaning from your many skills ,I have to catch up I have been away for a while ,so to my delight I have 3 videos to study ,much appreciated
Does anyone else hear a stray voice at 21:40 saying something like "oh my gawd"?
I heard it, backed up a little, heard it again. I have no idea who/what that was but it definitely did not sound like it came from Ron or from another person in the room. It sounded "unnatural".
Neighbor maybe?
I had my headphones on im kinda certain it was ron
One Tube Radio explanation is very interesting.
I have to add some of my understandings in your explanations.
1- Two switches have been used on antenna coil to reduce the step changes in inductance for fine tunning. Had one switch been used, it would have given larger step variations in the coil, resulting difficulty in fine tunning.
2- The variable output from the cathode, in my opinion, is for the tube to work as a diode detector without B+ supply to plate and may be used for headphones without Amplifier.
These are just my understandings that may be wrong, please.
Nice little Home Build Radio..
Excellent Very Good.
The regeneration control of the second radio didn't work very well. Originally the radio would have used a set of headphones as the anode load which would be in series with the regeneration coil. In this case the load was a 5K resistor to provide a DC path and the speaker amplifier. Could the resistor/amplifier combination offer a higher impedance load to radio frequencies than headphones thus reducing the effectiveness of the regeneration coil. Connecting a small capacitor across the headphone terminals would show if this was the case.
It does have a capacitor. The inductance range of the variometer is far too large, probably made for frequencies down around 100khz.
early radios were certainly geared for the technically inclined.
I would think that 500R pot on the second radio was definitely there to balance out the B battery voltage, which might actually have had a result on very early tubes with a wonky filament, as then you could choose the cathode section in use somewhat. But yes simply not using it is not going to make a difference, though in very weak signal areas it might make a difference in getting a signal that is out of the noise, compared to one where the set just oscillates.
hot damn hes back the ronster!!
I repair old radio's for a hobby. I have nowhere near close to the knowledge that Glasslinger has, but I do enjoy it a lot mainly 60's radio's. I also have a Philips 2514 with bakelite speaker year 1928. I never made an attempt to restore it because I just don't have the knowledge. It is that I live on the other side of the world otherways I would love to give this radio to Glasslinger, if he promisses to repair it and make a video about it. I would really love that! But that is very unlikely going to happen because of the distance.
friday is much nicer now I have seen this has been uploaded.
please,please,please Glasslinger, can you find the time to make a video. About the Valve Characteristics, measuring device that we see you using now and again.Thankyou.
I am not sure that the tube on the second radio is healthy or not, I look at the white looking top on it and wonder if that is due to lost vacuum or some internal coating, but if that tube have lost vacuum it may be the reason the regen tuning and audio is poor. would be fun to know
Totally enjoyed that. TY
An Internet address being spoken from a 1920’s radio ? Most homes didn’t have a phone or electricity in the 1920’s. 100 years on…we have automatic flushing toilets…they had outhouses !
It would be amazing if I ever had a chance to meet you and work with you on a project! You could teach much more than anyone could ever learn in school.
Nice...,... 👍👍
Can you tell us more or do you have a video on that power supply you're using
Unfortunately, this was put together from stuff I had on hand, much of it unique and not available any more so the design cannot be reproduced.
Thanks Ron! How about some more glass blowing videos when you get some time?
50 watt AM radio.
18:00 It was intented, to control filament voltage, and current.
Very good!.
Looking at the schematic I was surprised to see that the B+ plate current flows through the headphones. An external amplifier connected to the headphone jack would have to provide a path for the plate current and yet not be affected by the presence of B+ voltage at it's input'
When building an auxilliary amp to connect to these early sets, provision should be made to accomodate the B+ voltage. A 10K resistor across the input terminals works fine.
Hold a cell phone next to the radio then wonder what technology they will have 100 years from now .
Was at the crane estate in Ipswich Ma yesterday, and the docent placed his smartphone next to the intercom box for size and technology. Amazing he said it connected to every building on the estate, would have loved to see the switching apparatus.
no se podía pedirles más 👍
Snazzy intro ron ;)
08:19 The old thing is so sensible that it can capture imperial probe Drone....
Does the B+ really have to go through the headphones to get to the plate of the tube?
Yes. You can see another very similar radio at
makearadio.com/restoration/paragon-radio-restoration.php
A resistor and capacitor can be used to isolate the B+ from the headphones if it is a problem. Most headphones will work fine with a few milliamps of DC through them but ultra sensitive phones can "lock up" with DC bias.
Wonderful! What was done to improve the first radio? Would be nice to s.how the variameter coil is wired. Also s.how the _mystery potentiometer_ is connected.
Is it possible the first radio was a kit?
Thanks for the video.
Perhaps, but more likely a magazine article, where they gave a parts list and some very general instructions, and the reader was left to DIY it all.
@@SeanBZA
I noticed the front cover had a "P" drilled into it, that's why I thought it was a kit. Looked too professional...in a sense.
Maybe you can help me restore a home-made set, it's a 3 tube, 4-pin base, square wire.
Missing a knob but looks 95% there.
Tube has a 1927 date on it.
As always, a great video. I have a question. NASA has for some time now been trying to invent technologies for exploring the surface of Venus, where lead flows naturally. That are having difficult coming up with a viable radio transmitter that lasts longer than a few minutes. Do you think that some type of vacuum tube technology could be designed to operate at 900 degrees from temperature resistant materials? This is more of a brain exercise because NASA would never do something cheaply.
take a look about the 1P24b tube his specs are surprising !
On #1 does it matter if you have the .01 condenser from B+ to B-? Have not seen one before.
Provides RF bypass to the power supply. Not usually necessary but good design practice.
@@glasslinger Is the COM A-and B- tied together?
@@estpst Depends on the set, but usually that is the norm.
@@glasslinger Ty
I think just a diode hanging of the antenna would perform better!
The tube, acts as a diode too.
I enjoy your great videos! Would you happen to have a 1, or 2, meg pot with a 400, or 500, k taper?
What is the rigid wire in the receivers made of?
This is stretched #14 copper buss bar. By stretching it, it becomes straight and rigid. The black covering is black shrink tubing. In the old days they used varnish soaked woven cotton sleeve but that is no longer available.
5:09 So the regeneration was capacitive and not inductive, even though the diagram show a coil on the feedback control?
I didn't know they could tune like that up into the short wave , my little c crain will do that. The old one is cooler
QUE BONITO!
Greetings:
Where is the detector to cut the rf envelope in half?
Where is the path to filter out the RG from the output?
The tube is the detector. The bias is such that it conducts more on positive half cycled of RF than negative. The RF is filtered simply by the headphones or speaker not responding to high frequencies. No extra capacitor is needed.
It would be a cleaner design if all the power, RF, and audio connections were on the back of the radio. Still, pretty cool to see how radio was like 100 years ago. My Great-Grandparents could have had a very similar radio. WNAX, here in South Dakota (our first radio station) began in 1922 ? I think… It’s very possible they listened to WNAX on that style of radio, or a crystal set…who knows.
Yes, I have sets with connections on the back, and some with all connections internal to the box. These were very primitive sets, probably EARLY 20's.
Are you able to pick up radio emissions from back in the day
Only when I have my transmitter operating! I have a CD with old radio programs and can play it over the air.
eski radyoları nerden buluyorsunuz
I only wish I knew what he was on about.
音は再生式ラジオだね。むかし作った、と言ってもST管は既に無かったのでMT管でね。
コイルinコイル・・・日本では輸入品(特許品)だったらしい。
VV(バタフライバリコン)で代替しちゃった。一応0V1ですかね？
25:07 aaaaaaandemonitozed xD
GREAT &FB OM 73
I dread saying this but, interesting P hole...
Takes a confident person to compliment someones p-hole. ;-)
@@nobodynoone2500 😅👀
I personally wish you hooked wires together before you soldered them. Otherwise it looks like a hack job...
You look very prety
This person is like a MAD SCIENTIST ,,,,, BUT i think they have licked 1 to many charged capacitors