I use Kicad. (freeware, easy to use and an extensive library of components and footprints) You start from your circuit diagram and from there you create the PCB layout. You can have a rule check performed on both your schematic and your PCB. You even get a 3D view. You export the Kicad file and send it to the PCB manufacturer. A few days later you will receive a professionally made PCB in your mailbox. (with silk screen, corrosion protection, drilled holes, ...) Easy, simple and no polluting chemicals at home.

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CLASS H is my choice.. No one can hear or even feel 2Hz... LOL I like 8-ohm- 4-Ohm... Impedance.. When you get below 2-Ohms.. unless it's a subwoofer things start to get pretty MUDDY to me.. You got a couple of nice BOAT anchors there.. Maybe you could convert them into the infamous infrared heaters..

In today's world and with advancements in transistor tech. using an older or newer tube amp. is like going to an ART SHOW with sunglasses classes on... Tubes do NOT provide a better or warmer sound than a good high-end transistor amp. does today.. Hey, it's all in the EARS of thee BEHOLDER. If you want to spend a lot of money on old technology...go for it.. For my home sound system, I like to run professional live music amplification and speakers. P.A. equipment to me sounds just as good as a GOOD looking Artsy, Fartsy, setup that costs 10s of thousands of dollars.. Look at the specs.. of your equipment before you buy.. Learn how to understand electronic specification data sheets.. Why buy an amp. for $3K when you can get one for $400 that has just as good or better specifications on the data sheet..

I first assumed the timer circuit was to delay the B+. Not so! Nice informative video.

Schneider Electric, YIKES! Go Eaton Looks like Schneider cheeped-out using worst possible parts inside.

I have a pair of these Ona storage shelf. I’ve overhauled them but it was early in my interest in tube amp work. Requires a recheck before use. I did acquire a quad of NOS 6FW5 which is near same tube but it has a higher screen voltage. I did try 6AU5 in amp and it’s easy to replace them. When set up I found no benefit.

I'm having trouble with a tube radio that is discharging to the metal plate, and the volume and tuning knobs when it's on... I tried reversing the plug (as it Doesn't have ground discharge) and it doesn't kick when it's on but when it's off.

Why do you make it so difficult ? In my opinion it is possible to design an electronic circuit that fits in the original can and with only 3 connections. (X, L and P)

I restored and got this signal generator too. I got BNCs on mine too.

can someone explain the purpose of the centre tapped capacitor on the input of the ac line, what is the significance of it being centre tapped, just trying to learne something new, thanks

I think you have to much fun it’s gotta be illegal right !

I just bought a Silver tone 1807 radio. Can you tell me what kind of antenna I would need?

Hello. I have a boombox which does not play any radio station clearly. Every station has static noise. My car radio plays them all good so the signal is good. The boombox is very clean inside and has a new fm antenna. Where should I check? TY

Beautiful car!

Hi Paul - Just an idea but may be very useful for others who own this radio: A video about building a power supply for this radio. Most people who own this radio opt for a home brew power supply that doesn’t use the dynamotor (including myself). Would really enjoy to see how you would design a supply for this radio. Just an idea… thanks!

lol. wow, what PITA! So glad I never had to deal with that system. 😂

bom dia, preciso do mosfet( mxr-9745rt1) usado no icom ic706mkiig, teria alguma impresa que voce mi indicaria para comprar 73, ( pu1mas) marcos. rio de janeiro.

If this is a replacement for a tung-sol P229D, where do the grounds come from?

Have you tried blinker fluid?

Wow…talk about over-engineering to solve a problem that doesn’t exist. 😂 While the skill and knowledge is impressive, I’d convert the car to 12v (for many advantages) and then carry an extra flasher unit. When any single component on that board fails, how to you repair that while on a road trip?? KISS is a great philosophy to apply.

Really cool video love seeing all the big iron ,and well Big everything inside that transmitter makes working on old tube amps feel like building models on a 1/32 scale. You have a diverse and very interesting channel im very thankful that you share your knowledge.

Good job Alex.

These brown PCBs in Heathkits are my favorite.

Guess what, I just got a Heathkit O-11! I'd download the manual and instructions to it.

Fascinating ...

This is so cool. A retired EE here and can certainly appreciate this stuff. But the programming you can get is not so cool LOL. I remember my grandpa sitting by the radio for hours listening and enjoying himself.

Awesome job professor 👍

It's a dry wet amp one amp is dry or clean the other has effects or wet awesome design 😊

Perfect Paul... looks great...

not bimetal, it's just a wire, when it gets hot it gets longer. some flasher unit pass the lamp current through the wire instead of using a separate heater.

changing flash rate is a feature not a bug, it tells you to replace the bulb

At the last time it was detected that vioce coil of speaker is disturbed, need to be replaced.

It was the fault of B+ supply,I had also repaired such types of faults in ,GE,gec,hmv radios about 45 years back in thear 1979.thanks .

Can you give me an example of a video where the Vedolyzer was used to fix modern equipment! I'm so bummed!

I'm a bit disappointed that you got it working after so long and then didn't use it to fix modern equipment! haha

17:30 I could not find the video referenced, though aware the helical cut causes induction. What I never could find or get an answer on is if this affects the signal through the resistor and/or surrounding signal(s). You and others have warned about resistor selection in RF circuits, however, carbon composition resistors are no longer being manufactured and becoming difficult to obtain. So then does that mean at that time radios will be no longer repairable? Or am I over thinking replacing out of value resistors in this 1964 German radio? Thanks in advance, Adriel

I can design and build the same thing with half the components and one third the size.😂

Hi, I am lucky to have got one of these beauties, from an expat VE SK ham, here in CX land...dirty switches cleaned out well , I would love to have a go at the illumination, but...at 73, I may leave it for the next owner...cheers, love your videos, 73! Raul, CX3DRG

For so many years i've been wondering how this type of relays works, in detail , and once again, i am learning from you. Thank you so much for sharing with us all this Informations in this beautiful world of electrics and electronics!

Thanks for this video, we learned a great deal from you. Great job.

I need you for like one day

I believe that was an old spermalater, that helped guys to reduce fertility after having 12 kids. You just set it crotch height, turn it on and let it do its job. No future worries about ever having kids Bada-Bing-Badaboom!!!

I must assume that substituting LED turn directional bulbs is not advised?

I'd be afraid to remove a cover screw from this thing.

Mr. Carlson’s Lab draws together such a great group of folks. Best comments, wonderful people 🤙

Isn’t that ridiculous?

I love that you make the alignments simple to follow as it can help others with diagnosing a radio. Examples of this: IF alignment (looking for highest signal peak) Oscillator alignment (dial tracking accuracy) Antenna trimming (signal strength)

@1:43 Mr.C, I did not expect you to be one of those that doesn't use the little ribbon. It goes under the battery so you can pull on it to get it out easier.

WoW