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Where is the diagram to show how you did this

Beautiful Tube Magic ancient tech from another era. Today it looks like it came from a parallel universe since they work so differently as semiconductors

Bought one of these from a local ham and used a sparkomatic speaker for sound back in the late 1980s. I remember using baudot on the C64 and rigging up something with an old telephone, was able to simply lay the telephone handset on the speaker, adjust the volume just so, and start reading text on the screen. It was so fascinating! Thanks for sharing.

I dont know if you have a link to the command information on the radio there. You dont have it posted in the video notes.

Good Job! Thank You :)

Nice video of the Hallicrafters S-20R. I have a friend that has one. He bought it as a Novice, but eventually sold it. He spilled some white paint on the AC cord at some point. Several years later, he saw an S-20R for sale at the Gaithersburg Hamfest. It had paint on the AC cord, so he bought it. He's not sure if it's his first radio, but he likes to think it is. I recently traded something for the earlier Hallicrafters S-20. It is not working and has a torn speaker. I plan to restore it at some point. Thanks for the video. 73 Paul AA1SU

Hi.when in Cw for tune up and your needle is pegging to the right, open the side hatch, and adjust the RF VOLT peg. This will allow your needle to fall back to 2/3 scale to give you room for adjustment. Each bands 2/3 scale may be different.it doesnt need to be accurate. Its just a needle float. Afterwards.. Keep in CW , put selector to IP and send. The needle should be at 200 210mA on IP scale. Adjust with carrier control. Dont be surprised when u do this you are sitting at 230 250mA !! This will burn out your bottles. 200mA is nominal and should deliver 90 100w output.

That's awesome!

The Realistic DX-160 radio has a dissimilar metal connection problem on the tuning printed circuit board with the rivets that connect the top side printed circuit to the printed circuit on the bottom side of the printed circuit board. Resoldering is not sufficient. The fix is to solder jumper wires on the top side of the board to replace the connection made by the printed circuit on the bottom side. Shining a bright light through the bottom of the board shows clearly where to solder the jumper wires on the top side. This is the RF amp and Local Oscillator circuit so it will require alignment. Operation without repair may be intermittent.

KF5WYX - Excellent video. I have the same radio, with the head. I'm very interested in APRS. In the past, I've flown weather balloons with a tracking circuit that transmits telemetry as APRS packets, so that I can go track them down (for photography purposes, the balloons carry a camera up to high altitude). When running those missions I would use a GPS unit in the car ( from memory the Aviator 5 or such ), which was able to send location to my kenwood, for beacon, and also could also decode incoming APRS position packets, which I used to track the balloon. The unit could even constantly update and navigate to an APRS target, the good old 'offline navigation' days. Unfortunately that GPS unit is very old and no longer a good option for general navigation, and mine is missing, I think it was damaged and discarded. Anyhow, I am also a software developer with some experience building mobile applications. I would like to use a NodeMCU controller, with a Max232 to connect it to the radio, and a bluetooth module to pair with my phone. My mobile app could then send my GPS location to the radio for sending a beacon, and could be used to decode the incoming packets for tracking other APRS beacons. I believe that with a little time invested, I could also build an offline navigation with routing feature, in order to track incoming beacons. This may help me to restart my areal photography hobby. I believe you said in the video that the RS232 serial port could be used to send GPS data to the radio, can you give more information on this? In the past, I believe the GPS device plugged into the little 2.5mm jack, and either used one of its pins to TX the NMEA sentences as serial data, or maybe it used some form of AFSK? I've no idea what would need to go in on that port, but I do not need it if indeed you can send NMEA sentences or GPS data in some other format to the radio directly. Alternatively, I imagine the mobile app could simply package up the position data as an APRS packet and send that via the TNC? I have no experience at all in working with a TNC, and would appreciate any references you might have! I'm going out of town for a spell soon, but I may be able to start looking at this project as soon as this week, as I have most of the electrical components already.

Thankyou for posting this. Got one of these at an estate sale as a fix up project.

I have to ask...... It sounded horribly distorted. Was that the radio or speaker or, the recording equipment?

작은 루프의 길이cm알고싶어요?

I’ve been trying to find one of these for several years. I’ve got a couple of the MB-40s but can’t find one of these.

Made my first Japan QSOs on 10 meters tonight! From Chicago suburbs to Niigata, Seto and Chiba, I used to live near Seto, so it’s extra special!

you need a way to add pauses for the rests then its goated

I recently have been working on my 1960 M3 after taking the organ out of storage after 20 years. This had the front cover still on it so the insides are very clean. Tube checked and replaced as needed amp tubes. Hammond oil to left cup for scanner and motor, both middle and right cups had three doses of filling cup, that was Friday night. Saturday checked and had some squealing bearings so I left it alone. Sunday night so two days later: tonight, I realized that some heat might get the oil to flow better. After ten minutes of going up and down the generator on the bottom side slowly back and forth, I started the organ and had NO SQUEEALING!! When I shut down the generator it ran for 16 seconds until it stopped. I imagine this might be rare? but if your organ is squealing give it some loving heat! Johnne in Clallam Bay, WA. I recently have been working on my 1960 M3 after taking the organ out of storage after 20 years. This had the front cover still on it so the insides are very clean. Tube checked and replaced as needed amp tubes. Hammond oil to left cup for scanner and motor, both middle and right cups had three doses of filling cup, that was Friday night. Saturday checked and had some squealing bearings so I left it alone. Sunday night so two days later: tonight, I realized that some heat might get the oil to flow better. After ten minutes of going up and down the generator on the bottom side slowly back and forth, I started the organ and had NO SQUEEALING!! When I shut down the generator it ran for 16 seconds until it stopped. I imagine this might be rare? but if your organ is squealing give it some loving heat! Johnne in Clallam Bay, WA.

Do you know where I can buy the SWR changing switch in the top of the radio

I built mine back in like 1980 or so. Still working strong! A few suggestions though: (1) The digit driver IC's run pretty hot. Try epoxying a small heat-sink to the top of each one of them. (2) The blue rice-grain light bulbs blow out a lot. Either add a resistor to lower their voltage by 25% or do what I did, replace the bulbs with white LEDs. (3) The FM discriminator drifts, due to a flaky voltage un-regulator. Replace the regulator with an adjustable IC regulator. The original design just subtracts a few volts from the unregulated +12 supply, so it's even less well regulated. (4) You might replace the speaker output plugs and sockets with something more mainstream, like 5-way plug and sockets. The originals are impossible to source and are flimsy too. (5) Suggest adding a standard cable TV socket on the back hooked to the FM input (one side) and ground. (6) The power-on surge is tremendous and can blink your house lights and wear out the power switch. Recommend adding a 120 VAC relay and 100 ohm resistor in series with the AC input. That does a soft-start so no more light-blinking and sparks from the power button.

Late to the dance here but this is a venerable radio. It's a "white face" model too! It was my first "advanced" rig,the one I got after passing my Advanced exam. I fired this up when I got my ticket in the mail and called CQ on 20m with one of those sexy 2x2 calls - KB6HK - and got so many responses back. Turns out, in the old call sign system, this was Baker or Howland Island in the Pacific. (I was in Southern California.) When I gave my QTH everyone disappeared!

SB-310 was general coverage receiver . Would not match SB-401 with stock crystals .

Nice mate this is 4S7JL

take it to the car wash

6H6 tube is very cheap and common

Cool!

I have one of these, nice radio. I use it to check into nets. Do you have a pinout of the accessory socket? There is a dummy plug installed that has two jumpers, in place of the scrambler. The dim switch on mine has been modified to provide LSB in the down position. Any info you have would be welcome.

Yeah now don’t forget AM 29.000

I have the same radio and am starting to restore it. I saw in your video that you have the same problem as me with the s meter, I replaced the R25 22k 1w resistor near the capacitor c140. original value was 104k. I decided to replace all the resistance and capacitor.

I have the same radio and am starting to restore it. I saw in your video that you have the same problem as me with the s meter, I replaced the R25 22k 1w resistor near the capacitor c140. original was 104k. I decided to replace all the resistance and capacitor.

Sound like star wars

Ya gotta love a ten tec

HAARP was active

Nice signal 👌

I found mine at the curb, just needed a new power chord.

I hope you can make a few more detailed videos of it being tuned up and making QSOs.

Did you make a contact?

I have one these, work fine! 73 DE PY2RPJ TNX

I don’t know why, but that radio voice makes my anxiety kick in.

it looks like it was bobbing around in the sea

Had the mk III. Was a fantastic radio.

Icom Mic connected to Kenwood ;D it can't work properly.

Excellent transmission numbers to you up there 73

Heh. Great food for thought. Thank you .... best wishes from New Zealand.

I just saved a '60 M3 from the dump this morning! It's my second one.

I am quite impressed with the receiver sounds pretty good ....👍🏼👍🏼👍🏼

a garden hose what

Overcomplicated.

Did you add the mode switch or was it there. Mine is missing the mode switch

That's a better antenna that some of the commercial stuff I see for sale. Nice job.

"QSL for the lamp" 🧑‍🍳👌 Is there a coax choke at the base of the lamp? I'm wondering if the coax is actually your radiator, with a 90s-flavored vertical counterpoise.