High Voltage AM Transmitter equals FUN!
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- čas přidán 27. 05. 2018
- Let's check out the Globe Scout Model 40A Transmitter. I purchased this to do a restoration video, and got a surprise inside! To learn more about electronics in a very different and effective way, check out my Patreon page. Click this link: / mrcarlsonslab
- Věda a technologie
To learn more about electronics in a very different and effective way, check out my Patreon page. There are many more videos there, and I share some of my very unique circuit designs as well. Click this link: www.patreon.com/MrCarlsonsLab
Mr Carlson's Lab
mvh Tomas
Mr Carlson's Lab : I love your videos, My Father was a radar engineer for Lockheed Aircraft Service he had a ton of those bakelite crystals and used to hand trim them to a specific frequency back in the day, quite a long lost art form in my opinion. Thanks for sharing.
Kind regards, Eric Dee
Mr Carlson's Lab I was wondering if I could get you to build a nixie tube clock that I could buy from you or maybe a kit with directions how to put it together
Mr Carlson's Lab awesome videos thumbs up keep up the good work
I’m not one who usually buys into online stuff. But I’ll take the dive and see what’s up. I enjoy electronics and I’m always looking for more insightful ways to learn
Mr Carlson you have the perfect voice and tone for your videos. very professional.
I had one of these when I was a kid ! I was going to a class to learn CW and theory, on my way to get my novice license ....! It worked pretty well, the ham I bought it from showed me all about the HV items and how to tune it up. I can still the remember the smell of the dust burning on the tubes ! lol
i am 78 years old now, but when i was a kid in detroit area, W8BXO, doc. weston, taught me everything about ham radioˇ bless his souľ Great show
"This was built in the 50s, an era when people still took responsibility for their actions" 😂 Couldn't have put it any better!
Well said! That really struck me as I'm from this era...things were simpler then and developed situational awareness as a bonus.
I feel like an electronics engineer that is willing to sell something with exposed high-voltage wiring to hobbyists' homes where children are liable to get at it isn't really taking responsibility for their actions
😂
@@toresbe I completely agree. It would be trivial to put a shield over exposed line-connected and high voltage terminals. It was irresponsible to leave the 120V relay screw terminals exposed to anything that might drop across the closely-spaced terminals.
bummer for those that did that and still had accidents and died.
So much of this just goes over my head, but I still enjoy watching these videos.
I have a Globe 300 it was a product of WORLD RADIO LABS of Council Bluffs Iowa
One of THE Big Ham Radio
sellers in the late 40's and 1950's and they were SO Big that they decided to put out their own line of Transmitters 😅 which basically competed with the Johnson Viking and Ranger
transmitters. WRL is just one of the great names of the Ham radio history's Golden Domestic built gear era.
Wonderful memories......
"This was built in the 50s, an era when people still took responsibility for their actions." And we had a much saner and better functioning society as a result.
I would have given my left arm to have your tutorials on demand when I was 10 years old and even younger.
I had no information back then. Just fascination , electrical toys to take apart and the odd electronics project kit.
So great Carlson Thx.
I could'nt agree more.
I remember building my first CW transmitter from an old television set purchased as junk from the Salvation Army thrift shop for $1.00.
I salvaged the excellent power transformer, but I was very fearful about putting the transformer primary across the 120 VAC power -----that would be a short circuit, wouldn't it? So I studied up and learned something about inductance and reactance.
My one piece of equipment that I designed, built and operated entirely by myself was a telephone answering machine. This was circa 1970 when home answering machines really wern't available at all.
I used a capacitor across the telephone circuit and when the ringing voltage came from a call, that voltage went through the capacitor and triggered a relay, set up as a locking relay. That turned on power to a couple of tape recorders, and power was witched between one that play a message on an endless loop of tape and then a thermal time delay relay switched to a second tape recorder that recorded a message.
Worked reasonably well, and I never got in trouble with the phone company!
I had everything nicely packaged in a plastic box.
Don't ask me about the OTHER box that allowed me to receive long distance calls without the caller being billed for them....
"when people took responsibility for their actions" true words right there.
Great video yet again mr. Carlson. Love watching these!
I don't think there has ever been a time when people have been particularly inclined to take responsibility for their actions.
At least they did back then more than today. Cartoons in the 1990s didn't have to warn you "don't try this at home", because people weren't completely dumb back then. Nowadays, people use their brains less and less.
Falcrist some people indeed shy away from responsibility, perhaps better to say held accountable. If you touched the b+ it was usually your own fault, you didnt sue the maker because the possibility of being injured existed.
As you go back in time, you see that people are less and less likely to be held accountable for their actions... not more (at least in part because almost everyone carries a decent quality video camera in their pocket).
Education and intelligence levels are slowly increasing.... not decreasing (at least in part because if you do something stupid, you'll quickly find yourself on youtube or facebook as an example for everyone else).
And I was warned PLENTY of times in the 80s and 90s not to try things at home.
What the heck are you people smoking?
Not the same crap you've been smoking, apparently. I disagree that intelligence levels are slowly increasing. People are still doing stupid things and it seems even stupider things nowadays than before. The whole YOLO and ensuing idiot maneuver that inevitably followed comes to mind.
"when people used to take responsibility for their own actions" Subscribed...
Yes, I want to see the modifications! Thank you for this beautiful piece of vintage gear! 🙌
I have learned so much about transmitters from these vids!
Great video! My first transmitter as a novice was a Globe Scout 680a, very similar to the 40A. That 5 pin connector in the back that looped the heater and B+ through it was used for when out in the boonies. A 6 volt storage battery would light the tubes and a dynamotor or vibrator pack would provide the plate voltage. Many older receivers had the same loop through plug/socket. My dad was a ham too. Today he was born exactly 100 years ago today. He has long passed though. But it was cool to see this today. Dave-N2DS
Thanks for stopping by Dave!
Someone threw away the dynamotor for one of my radios. He thought, and rightfully so, it was an old automotive part.
Yes, please show modifications! I had one of these back in the late 50's; brings back a lot of nostalgia...
I love this tech Im 64 years and studied the old hetdrodine tube type tv and radios. Dont see much of this at all anymore. Thanks for the video.
You're welcome Greg!
I was having a really bad day, then I saw your video and while my day is still kind of bad, it brings some sunlight into it. Thank you!
dito
Same here, pneumonia on a holiday off because someone wouldn't stay home while sick...
@@garbleduser Where do you live that you couldn't claim the time as sick time instead of holiday?
Im a new broadcast "engineer" hire. I am in awe of the ingenuity and brilliance of the engineers before me. I feel really dumb when I look through their old mods and hand drawn schematics. I fell into this job and want to say thanks.
Smiling!
Back in the 80's I worked for Missouri Radio Center/MOcom. The owner took in an old WRL Duo Bander 84. World radio labs. I gave him 15 dollars for it, took it home. To my surprise it worked on 80 and 40 meters, after I cleaned it of all the hay and bird poop. Took it out of storage a few years ago and not working so good. Your video may have inspired me to try and get it running again,
“An era when people took responsibility for their actions.” Love it 😊
A "thumbs up" FROM Mr. Carlson is very high praise indeed...
This is the video which I credited for giving me interest in amateur radio licence. Ever since this I saw this video and got my license I’ve been hunting around for globe equipment (which is extremely rare in the uk) and hit the jackpot a few weeks ago with a globe king 500B tx just 100 miles from me so I’ve just got to get the full license now. Keep up the good work making sure this stuff is saved.
M7BLJ Jake
I have several vintage 1950s AM transmitters like this including a Globe King 500, made by the same company that made the Globe Scout. However the Globe King is considered a "500 watt" transmitter consisting of 3 decks mounted in a rack. Namely a power supply desk, a modulator deck and an RF deck. It is basically a 4-400 tube modulated by a pair of 811''s. Also have a couple 100 watt category plate modulated transmitters including a Johnson Viking 2 (early 1950s) and a Johnson Viking Valiant (also 1950s). I've had them all on the air at one time or another. Just for the record I am a licensed ham.
Boy did you bring back very fond memories, owned one of these in the early-mid sixties when I had my novice license along with a National NC 303 receiver....thank you Dad, (miss you).
Wow! This takes me back to the 1950's when I was a boy and did all kinds of things like this. I don't know how many vacuum tube radios and TV's I scrapped or repaired back then. But then I went away to college, discovered computer programming, and that changed my life forever.
I still think the Internet and computers really did a disservice to the younger generation. I am 66years of age , and grew up in the age where we could build our own home brew sets, and shortwave and ham radio were just so much fun, because we were actually trotting all over the globe with air waves and no physical connection with coax such as with cable television! Slow scan ham radio was so cool!
Always impressed with how good of a communicator Mr Carlson is.
Literally everything of importance is explained, proper safety warnings are always given.
Another excellent video!
A modification video on this RF amplifier would be marvelous Mr Carlson! I'd be interested in signal clarity and RF power increases for example.
That tuning reminded me of tuning up the old radio teletype sets back in the 1970's they were some powerful units, could talk around the world with them if you had the right antenna, we took over an old marine compound back in 1971, the jar-heads had two poles that had to have been over 60 feet tall with antenna's strung between them every so many feet. Buddy of mine had to strap on some Gaff's and climb those poles to tear down their sets and replace them with antenna's cut to our frequencies. Now I took the Field Wire-man course back when I first enlisted in the Army and we climbed poles for a week, but I would have been scared to death to climb that far. Ah well, I do envy that old buddy of mine; haven't seen him since '71 but I did hear from him in '77.
An era when people took responsibility for their action: how true this statement!!!!!
Oh what memories you have brought back. There was the Globe Scout, Globe Chief and
the monster Globe King. I still have much of the old AM transmitting equipment like
an ART-13 from WWII Aircraft. Lots of high voltage there. LOL
All great equipment!
I have fun when I visit Mr. Carlson's Lab!!
another fine quality natural selection helper device, we need more things built that way ;)
There must have been Elmers so that you would learn without the shock.
@@ProperLogicalDebate I received a nasty shock one evening when working on a 100 Watt class plate modulated transmitter. I had it powered up into a dummy load, plate voltage on full, and I have the meter connected and was adjusting a sliding tap resistor with a screwdriver while monitoring voltage to the modulator tubes. At some point I got a bit careless and my index finger touched the metal stem of the screwdriver while my left hand contacted the chassis. I got full DC plate voltage in one hand, through my heart and out the other. It knocked my across the room. For a few seconds I saw a bright flash then stars, had a metallic taste in my mouth, felt off balance. When I recovered a few moments later I could smell burned flesh where the current entered my right hand. It was a painful shock and when I think about it I can still feel it to this day (it happened around 20 years ago). Since then I never entered my hands near a transmitter (or any HV device) with it plugged in and the power on. Even if I am making adjustments it gets powered down, unplugged and discharged first before my hand gets anywhere near the insides.
Modifications are always fun. Would love to see them.
you make me miss my former head tec. don foster so much as i am now 78 and sow much water under the bridge so to speak ( we were in portland , or. usa ) thank's carl stout . can't beleve i have forgot so much !!
Yes, I would like to see !
Ahhhh, another video featiring the smooth, dulcid voice of Mr. Carlson. Nice....
thank you most kindly for taking the time to fully explain what (and how) is going on with these circuits, you are definitely an old school ace, a rare breed these days....and...who knows how to explain it comprehensively to boot! thank you sir.
You're welcome Blake!
Love seeing your vintage electronics presentations .I began my journey in electronics at the age of 12 am now 62. You are absolutely the best instructor. You remind me of a couple of my first instructors in advanced electronics and color television design and circuitry classes in 1971 @ ft. Bliss & 1975 Homestead afb . And of course my father who started it all and i learned about radar and guidance systems from. THANK YOU !
I'm so glad you've decided to depot the transformer from the previous video. That's going to be so cool to watch!
Yes please to the modification video!
No modifications needed please!
Thanks for article! Reminds me of my early ham radio days (ex-WA2YTO) and my original transmitter, an EICO 720, also with a single 6146.
I always love watching old stuff get a makeover for the modern times :)
Great video. When I first got my general in 1959 I built a Globe Scout 680A which was similar to this one, but ran more power. You have a great way of explaining things!
Mr Carlson, you are a celebrity!
As a ham this is a great looking rig! Pleasure to just watch the thing come to life.
"took responsibility for there own actions", what a wonderful era it must have been...
Yes, please. Mod it up. Really look forward to that!
I wish that I'd had a video like this when I started in electronics years ago. Well done, sir.
I don't know that much about electronics, but watching you doing your thing does three things for me:
1) Total relaxation. Seriously, watching your videos takes the stress right out of my day. =)
2) I learn lots of things. Your explanations and methodology alone are worth a college course.
3) It inspires me to dive further into the world of electronics myself.
I love old electronics. To see them restored and appreciated so much is very satisfying. Thanks for doing this.
Always a pleasure to see a new video from you.
Your detailed information about every part of the equipment nearly gives me goosebumps (-;
very cool piece of gear, i wish my grandfather were around to see your vids! RIP: WB3GNR
Wow, great video, certainly for us old timers :-)
Sure would like to see mods to the transmitter, Very nice video, keep them comming. Greg
I want to add his electronics course is the best I have seen. It also covers surface and through hole, tube , and PCB making.. Awesome course !!!
My vote is probably too late, but I would love to see your mods to this unit. I'll poke around, maybe you already did one. F.Y.I. I spent my first two years in the Air Force working on AM avionic transceivers (AN-ARC793 and AN-ARC546) that were installed on the F4 fighter. Lots of fun with tubes and high voltage and motorized mechanical tuning. We eventually retrofitted these planes in 1981/82 with an all solid state modular unit AN-ARC164. Back then I had all the latest and greatest test gear that I don't have now. Thanks, Mr. Carlson, VERY interesting and instructional video.
Perfect video me, thanks. I'm in the process of homebrewing a AM valve based transmitter. :) Good caution notes on high voltags :)
Love it! I started out in my teens working on old black & white TV’s then tube type CB’s. Grew up in far West Texas (120 miles to the closest city, El Paso) so I didn’t have much access to any other gear. After high school and marriage I went to a tech school and was in the first class that didn’t teach vacuum tube theory. So I learned it pretty much on my own, so I really enjoy watching and learning more and more about the nuances of vacuum tubes. I am currently restoring a 1929 Radiola receiver and man has that ever been an education. Hand wound wire resistors “cards” for lack of a better term. “Mystery” components as they are referred to in the literature, which just turn out to be a negative feed back variable capacitor, but Radiola was not labeling it on the schematic in an attempt to skirt around a German patent on the circuit design. Wholly different world than other vacuum tube gear I have previously worked on. GE Pre-Progress, and Progress line, Motracs, and Mastr II and Micor high power base stations & repeaters. Great video Paul. Side note: I was taught that a pi network was called that because the schematic was shaped like the Greek letter pi. Please “Hot Rod” that transmitter, I would love to see your improvements to that circuit.
I've always loved electronics and poked around with it. You have got me hooked on playing with vintage systems Thank you
YAYE finally something worth watching on "the CZcams" im always happy to see you posting a new video.
Ahhh, the good old 6146. Years ago, Just about every transmitter I had, used them and never a problem. My first was a Heathkit DX-60B as well as a Johnson Viking II. I miss them now as I homebrew solid state these days :-)
B+ is Battery plus .
Hey Mr CARLSON i am totally fascinated by the way you are teaching us vintage and nowadays electronics.
w2aew and you are two of my favorite electronic - channels.
Thank you and many Greetings from Hamburg Germany .!
Sweet! Looks like I'm not going to bed yet. Thanks Mr Carlson!
Such a beautiful transmitter! Thanks for the video.
WRL made great equipment. I enjoyed watching this video very much. I had the Globe King 400C that put out 400 Watt on AM. It was rock solid and I had all the coils for the 20 - 160 Meter bands. I had a Johnson Viking 122 VFO and a wonderful National 183D Receiver. There are a couple of pictures of me with my rigs back in 1958 on my Facebook timeline. My call sign was K9BYI. I got my novice license when I was 11 years old. Looking forward to seeing more videos on older ham gear.
Thanks for taking the time to write Bruce!
Thank you for explaining how the circuit works, very educational. I enjoyed it very much.
My Dad had this radio back in the 50s. I have always wanted this transmitter, good find. I have my ham license too, but ham radio is not like it used to be back in the day. I see the old filter capacitors have been replaced with a bank of new electrolytic caps. Electrolytic capacitors become trash after 10 to 15 years.
Wow...beautifully made and crafted transmitter! and equally beautifully made videos Mr Carlson...although a little bit much addictive ;) ..can't stop watching one after another...I appreciate the high quality of your scripts and communication style. Thank You and Keep-on the good work!
Yes, Mr. Carlson! Hot rod the Globe Scout transmitter, please! I learn something every time I watch you work on this old gear. Today I learned the meaning of 'dipping the plate current', something I've always been curious about. Thanks!
My father (who recently passed away) told of a gentleman named Buck who stuttered so bad it was almost impossible to understand him. But, when he keyed his mic, all the stuttering went away. This was back in the early 50's, so I'm guessing this is the kind of equipment he used. Dad said he was always welcome in Buck's ham shack, but was forbidden to go in when he wasn't there... Now I know why :-) Wish dad could have seen this video, thanks Mr Carlson :-)
Wow. I have never seen an older tube-type radio in action. What an excellent presentation! Modern transceivers make things so much easier and a lot safer! I would love to build a tube-type transmitter one day and operate CW. I have a passion for Morse code. 73 de AD0WE
Wow, That's one of the radios that I started with when I got my novice license. This brings back many great memories. Thank you.
Love these videos! Highly educational and interesting for a electronics enthusiast
Another great master class in appreciating useful electronic gadgets from the golden era ! Very much enjoy the value of your experience and knowledge in this field, and safety warnings not to attempt working on these without proper methods and understanding. Between you and Uncle Doug, I have returning interest in electronics that I had a young man. Thanks for your effort !
I still have a Globe Scout 680, that my dad built from a Kit, back in the mid 50's. He or I could never get it to to work with a VFO. Worked great with crystals. Your video has Inspired me to drag it out and preserve it, Been in storage many years. Thanks for your very informative video.
Wonderful and very interesting,Thank you.
Very cool, thanks for showing how the old tube circuitry works.
Glad you liked it!
Absolutely great stuff Mr Carlson. Love this channel.
Yes, please do "soup it up" on the Globe Scout! The first transmitter I ever had was a Globe Scout. I missed it so much that a few years ago I found one at the Huntsville Hamfest and bought it. Sadly, one of my X's family stole it and I no longer have it. Have not seen any since the last one that I bought. Looking forward to the "depotting" of the transformer too.
Thank you for sharing this vintage transmitter…… It would be nice to see some cool mods done to it……. Stay safe……
Thank you sir for another great video. I still use my old Swans. Also like you informing the new folks about B+ and its potential for being lethal and being responsible for your own actions.
Wow, thank you Mr. Carlson for your wonderful video here. I'm enjoying it so much because it reminds me of my boyhood with similar vacuum tube radio devices. 🙂
I absolutely loved your presentation! Yes on the future kids on the transmitter. Thank you1
Awesome, Thank You !! Mods are most welcome!
Mr. Carlson, Thanks so much for every video you produce, especially your Patreon Videos. I learn so much every time I watch one and I’m amazed that I’m retaining a lot of this information. I’m also having a great time learning. I also learn a lot just reading the comments and your responses. You make the answers to so many of what seem to be, very complex questions, seem fairly simple just the way you answer them. You are such a class act.
Thanks for your kind words Buddy!
Yep! Definitely like to see the follow up mods. Thank you for your content!!
What a great video. I operated a Globe Scout 65A, a later version of this one, when I got my Novice license in 1955. The Globe Scouts were very affordable but unrefined. Constantly replacing the transmit switch was a way of life for owners. The AM modulation was ‘screen modulation’ which is a cheap technique. These were typically used by novices on CW. I bought mine new and paid
$ 100 wired and tested. A kit version was available for a few dollars less.
My first transmitter. That was such a very nostalgic video for me. Great stuff as usual.
Thats the great thing about electronics, whatever sphere one is into, and no matter what your skill level, there is fun for all, such is the diversity of our great hobby.
I love the videos of Mr. Carlson. He is truly the Bob Ross of Electronics.
Cool transmitter. It reminds me of the Heathkit DX-60 I built in 1972. That was the first year the FCC decided that Novices could be trusted with VFOs, so I also built the matching unit to free me from being rockbound. My receiver was a beautiful old Hallicrafters SX-101A. 73’s from the former WN4BCG.
Very good information. Very good delivery!
EXCELLENT video!, I was the kid(old dude)in the remote class room with his hand up all the time while you were going over schematic by the way ,Ha
Great video as always. I'm looking forward to seeing what you do with this transmitter.
You definitely have the most interesting channel on youtube. Excellent topics
Hello, Paul. I just wanted to say, thank you for sharing your knowledge on vintage electronics. I grew up basically tagging along in my grandfathers Radio/TV shop. Just recently, I decided to restore some old equipment. Your channel has been such a valuable resource for me. I look forward to following along on Patreon as well. Keep up the superb work and your passion for teaching electronics.
Thanks for your kind comment Jeremy!
Paul - Another interesting vid. I always learn something new. Depot sounds like fun - can't wait!
Very nice class Mr. Carlson..... Enjoyed the schematic part the best, thanks
I'm glad you said "take responsibility for their own actions" !
Excellent video. Great background and knowledge transfer. Thank you! I learned a lot. Your videos are very well produced.