Very interesting, Vern. Thanks for sharing.

The answer to the question is : 42

You probably already know them, but a couple of years ago I have been in contacts with a company called triad magnetics. They make all kinds of transformers, also to specification, including output transformers for audio. That may be a remnant of the earlier radio company. If you like, I can send you the information.

Sounds reasonable to me. I think you make a good case. BTW Happy National Radio Day.

Soviet tester: kzfaq.info/get/bejne/l8ieps2lvLKxm2Q.html kzfaq.info/get/bejne/rMebgqhnsbHJmIU.html kzfaq.info/get/bejne/kJOjndRq1bWyqX0.html kzfaq.info/get/bejne/lcCZdtmExp2yhKM.html

I just finished going through the datasheet of the 6B5 - it is the most unique datasheet I've ever seen. In a way it is like a sales brochure or a handout for a sales presentation given at a trade fair. My guess would also be that the unicorn radios were made to get manufacturers to adopt the 6B5 or other parts. Regarding the engineering samples you received during your time in the semiconductor industry I have a question, if you have the time: I have a small company here in Germany specializing in retrofit electronics for automated storage systems and would like to find customers in the US and also ultimately move the company there. Since my products are somewhat complex, kind of like a specialized PLC or the ECU of a car, and about 2-3k each, I've wondered how to approach potential customers. My current approach would be to have the full documentation available online + videos on YT that cover various aspects of how to install the systems etc. and then just a simple flyer I can hand out at trade shows or send via email after an initial phone contact. As for engineering samples, I'd make them available for free for an evaluation period after which they can be returned or purchased. Do you think this would be an effective approach? I'd highly value some input from someone who has a work live worth of experience in that regard.

Great video, very interesting. I enjoy the overlaid commentary as well :)

Bravo.........100walt light bulb tungsten ......old school......was a 50ohm .....cheers

I have a 666 and it is a good tube tester. However, found the tube chart for the EICO 667 is much more accurate and cn be used with the EICO 666 with a little adaption since the first 9 pin setting are the same. Also I have the EICO 610 adapter. It allows you to test Nuvisors, Novars, 10 pin miniture and Compactrons using the 666. The Eico 667 has sockets for them but they replace some of the older tube socket types. I also have a Hickcok 800A. Having had to repair both the Eico 666 and the Hickok 800A, the EICO is better built and easier to repair. The real advantage of the Hickok is the tube chart is reliable and it has all the sockets. If you are working on really old tube equipement I can recommend my Precision 912 tube tester from the 1940's.

I could help you.

would you like to grow your KZfaq channel ??

😊How are you? I hope you are very well. You are an inspiration to me, I watch every video of your channel. I think you are an inspiration name right so I think your videos should be released regularly which inspires me a lot. stay well Weren't you uploading videos to Facebook

I like my old military ME-26D/U VTVM's. They have a 100 Meg input impedance on DC. Other huge advantage to them is you can accurately measure AC up to 720 MHz due to the diode tube built into the AC probe. As you say though, trap for young players. If your looking at a service manual that calls for a meter that will present a 1k or 10k impedance and your using a meter with 100M impedance the readings will not match the service manual.

still running dads big weller... cracked and repaired Bakelite case.... its a beast 50 year old?

I found this fascinating - there are quite some traps for young players here. Documentation, videos and knowledge like this should be compulsory reading in engineering education. You moan quite a bit about old Sparky (hilarious), but I beg to differ - Sparky is doing people a great service!

The case looks great, Vern. I remember a friend telling me about this back in the day, but you explained it well. Cheers!

Wow, that was an epic job Vern and it worked so well. I wonder if something like that would be used in a repair workshop, most old timers would know what is wrong with the radio and just fix it. I cannot believe you can pick up stuff like that for 5 bucks, we have nothing like that here. Good luck with your vinyl cutter 👍🙂

How are you? I hope you are very well. You are an inspiration to me, I watch every video of your channel. I think you are an inspiration name right so I think your videos should be released regularly which inspires me a lot. stay well Weren't you uploading videos to Facebook😊? ❤

I live near an air force base. This might be fun.

That sure is better than the tube extenders with connections for a voltmeter, but they allow the use of a scope to check signal flow.

Nice effort to repair the canned ohm resistors! Very interesting piece of kit. Thanks! - JRH

Awesome repairs on a pretty cool old piece of equipment!

This video was horrendously long, and it was completely excellent too. Please don’t apologize for your in depth videos, people who can’t watch this video in its entirety wouldn’t watch it anyway, the rest of us love this content. Just scored two Genrad decade boxes in cherry condition for my bench, grab those units if you can, they’re fantastic. Thanks!

Thank you for this. You're a life saver...well...a money saver.

They probably should have called them cantdome instead of candome resistors. That was a great dive into it's particulars Vern. You really know your stuff! Steve from IL

DC meters from thar era were at best 3%. AC meters were in the 5% to 8%. range. The sensitive would be 1000 ohms /volt. A 20,000 ohm/ volt dc meter would have been very expensive in the 20s and 30s. I cut my teeth on 4, 5, 6, and 7 pin tubes. 01a, 45 ,6c6, 6d6 , 27, 24 80 just to name a few. The first transmitter I built was with a 01A tube. My regen receiver also used a 01A. I will be 87 years old this Tuesday.

Actually that device somehow looks military to me, very well built. Also very well messed up… you do have the patience of a Saint. Amazing stuff. And the result were amazingly accurate meter readings. Interesting device. Thanks for sharing!

Great work untangling that rats nest of messed up modifications. It probably is more accurate now than it ever was from the factory. Also thanks for the autopsy of the candohm. There is no question why they fail anymore.

I think part of the color issues in-camera are due to your white balance being off. I am assuming the "plain printer paper" you were holding was white, but it looks very blue.

Should point out that shaft must have grease applied before putting bevel gears onto it to prevent cold weld.

Fantastic review. Thanks Vern 😊

Input pulley will be turning clockwise viewed from top as per engine rotation

Great video, been waiting on a good one comparing the two. I am new to GMRS and radios. For 2 weeks i have been racking my brain between these. After watching this, I believe i will be purchasing the UV-5G Plus. Really just looking for a good truck radio for emergencies as I spend alot of time fishing, hiking, and camping out in the Daniel Boone National Forest here in Kentucky without cell service. We have a repeater covering approximately 75 miles here so hopefully this connects to it no problem.

unsubscribed

Thanks again for a very thorough and fair comparison and review. I am amazed at the great functionality of these little radios. Personally, I have no use for them - I'm not well-versed in this particular technology, and I doubt any of it is allowed in Europe - but they're certainly little marvels, that's for sure. And somehow it's sad that they'll never be repaired if anything goes wrong.

Radio Mechanic do you ever say your name? I watch radio restoration videos and two- way radio reviews for entertainment after spending 35 years in the two-way industry. And I need a name when I talk back to you during the video. Just to myself sane. BTW keep up the videos I find you very entertaining.

What about actual spectral purity? Some of the earlier modes had 3rd harmonic issues. I have the smaller unit and the battery won’t last very long on high power.

Tariffs help, but when the politicians are on the pocket of the big C, it makes things hard.

Greetings: The two detector diodes are usually connected together before being connected to the top of the second IF transformer secondary or one of the diodes is connected directly to ground. I do recall seeing the second diode contributing to the AVC signal but not in he way shown here. I seem to recall that the detected signal exiting the bottom of the transformer going to the 455khz filter (low value caps) then to the volume control and first audio amp was separate from the negative DC that becomes the AVC signal (but I could be wrong)..

What a beauty! These simple looking cheap radios have stood the test of time much better than the big ugly overblown things the rich folks were buying

Being a PC "man" for the last 50 years - besides being an electronics guy - I have a hard time understanding why people are abandoning their trusty Win10 PC. There is nothing that goes pop when the support discontinues for Win10. And your anti-virus system "Windows Defender" built in - is still going strong with the usual updates over time - no changes here. It's the kernel - the central portion of the Win10 operating system - that is no longer updated with latest inventions and minor bugs found. This CAN and MAY be a threat in the future. Exactly these words have scared the heck out of users thinking their Win10 PC would go pop or at least be riddled with all kinds of virus programs. Microsoft has done a very good job scaring people to buy new computers this way. Think about it: If you are satisfied with the your Win10 functionality, and dont need any AI or 3D functions - keep your Win10 PC. It wont pop !

Great restoration! Looks and sounds superb.

Hi Vern, that came up great. A nice radio for your collection. Regarding the waterslide paper, the backing with the print on it is discarded when the printed waterslide part is slid off, you shouldn't see the printing. Looking at the first dial it did look better in the camera, very strange. Very nice project 👍🙂

A damn fine job sir! The sound is amazing, even through the camera. Gee, getting 610 AM as a strong signal, huh lol well done!!)))

I just purchased a Triplett 630-PLK Type 7 now after watching this and hearing Ron talk about how these meters are useful for measuring high megohms in capacitors. I'd like to ask about your meters. They look new! I'm assuming that's not by chance based on the meters I've seen for sale so far. Would you mind talking about how you go about getting them in this condition please? Even the straps look new! Thanks in advance - love the channel! Cheers - Luther

Nice job, Vern!

It is the modern restorations that color the bottom feet or base black. Most if having a two tone finish the color would be as close to the center of the face color and here the top. I always thought the radio dial color was the same as a manila envelope in color. That's a pretty darn nice looking and sounding radio after all that work. Great job Vern.

Looks good and I like the light feet to give contrast and lift the set of the bench. As for the dial colour if is is an image file of scanned file then select your colour hue and tweak the saturation for the colour and the gamma for the contrast and mid tone. I think doing it with the printer setting you call on preset stock paper settings and there are so many variables you will chase your tail. Hope this is of some help Sounds sweet. Standard paper will bleed ink on a laser jet so less ink and more dithering is used giving a weaker contrast, photo paper is more resistant to bleed but if you use this setting on standard paper the print will look soft. Try switching ink / toner saving or Eco off, then have another crack with standard paper setting but print on photo paper. Not sure what image software you use but if it is MS paint the colour pallet is rather crude try MS photo editor or similar working with a jpg or photo file.

That’s a beautiful finish, and the radio looks and sounds just great. A restoration project to be proud of.

That came out real nice David I mean Vern!