Відео

First off, AMAZING JOB AND VIDEO! What type and form of acrylic paint did you use? Spray? Brushable? And if brushed, what consistency? Thick, medium or thin? Maybe just let me know the name, lol. Thanks.

well I have the 20b1 set. so hoping its good

I used 47 uf for the power supply caps and mine doesnt have a field coil speaker.

Funny that part 5 from the play list is missing, did youtube drop it?

I would spend 500 bucks for a rebuilt tube cause I just cant let go and throw stuff out.

My cloth picture tube band had also slipped down!!! and we were using a dolly and tipping the set

Is anyone interested in a B&K 415 with the manual

oh wow a total series on my set!! Totally amazed people drop off sets to be worked on. you must either have a fan base or very well known in your area. Had thought years ago Id try to get peoples tvs and radios working up to the 50s but never got past the nostalgia of I keep everything I own!!! Never bought stuff if I didnt like the looks/coolness of it.

In the beginning of your video you talk about the electrodes (obviously you mean electrons) coming out of the gun and flying towards the screen. It may have been pointed out in your earlier videos but it should be mentioned that the emitted electrons have very low speed and will not fly towards the back of the screen spontaneously. As I understand it, it is the high DC voltage that is placed between the gun and the back of the screen that accelerates them towards the screen where they hit the phosphor that emits light as a result of the collision.

"There's something very strange going on..." subconscious Carl Kolchak quote

Very interesting stuff! Looks like it is coming along greatly. I have been finding many of those 270 pF IF coupling caps to be bad in these sets, between 630 based chassis as well as the 621TS. Sorry that the test CRT is causing the brightness issue!

Hi Bob, it seems there is always something to be learned with each restoration. Since I have never worked on that model, I pulled the schematic to see what you were up against. If I remember correctly, I think the TV by itself consumed 285 watts, and 320 watts in a combo configuration, which used a separate higher power audio amplifier. The coupling capacitor value in the IF amp chain determines the IF bandwidth (a larger cap value produces a wider bandwidth and, so on.). Your discovery of the brightness problem (which you found by trial and error) is a regular part of my troubleshooting technique, especially if problem symptoms don't make any sense. I call this a "Reality Check", which consists of substituting out test equipment and test fixturing (one by one) to double-check that it is actually functioning correctly. This may sound far-fetched at first but, the technique has proven to be extremely valuable during exhaustive troubleshooting efforts. As you well know, those tapped power resistors are all custom parts. Replacing them with individual fixed resistors is usually cumbersome. The green corrosion on the resistor leads/terminals is an indication the resistor maximum body temperature has been exceeded or, the resistor has been operated for long periods of time at maximum rated body temperature.

Thanks for the tips! Just fixed my 10" Techniques bass speakers using glue, money notes (paper, not cloth) & a touch of newspaper. Works perfectly at low to medium volume, with some slight distortion at high. It had a hole in it from when my brother tried to vaccum the speaker, which eventually ripped around a third of the speaker.

I might be mistaken, but perhaps that resistor in the flyback can be replaced with a modern power resistor. By 1948, if one didn't live in or near one of the largest three U.S. markets, it wouldn't have been practical to own a TV set in areas like Houston, Minneapolis, Cincinnati or Omaha.

In the early days the cabinet and electronics were HUGE and the crt was tiny. I remember seeing a pre war TV in our favorite thrift shop in the early 70s. It had a tall cabinet with 3 chassis in it and a small square crt. I really wanted it because it was so old and cool but parents weren't about to buy it for me and I doubt I could have done anything with it unless I got lucky and it worked. Had a lot of light house and radio style tubes in it.

Another super evening and really love to watch these videos. I just love to follow along and amaze myself. Love this channel My very favorite channel so happy Bob posted another video I patiently wait for each new episode. thanks Mike

The people who bought that model where more then likely wealthy and could afford the unit along with paying the electric bill to run it T hat was a top self unit with 30 tubes for the best picture quality possible for that time period would you not agree ?

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