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  #31  
Old 08-14-2018, 10:55 AM
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From Mike. “I guess I figured out the "gauss" thing. thanks benman94! And I am just starting this project and I can use the help on this one from people with experience with the technology. With your comment about the convergence transformer, is it in reference to T702 on the Westinghouse schematic? Or are you referring to T701?

Marshall, please connect me with this guy so I can talk to him more.

email, phone number, whatever. Thanks.

Thanks, Mike”
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  #32  
Old 08-26-2018, 12:15 PM
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Greetings Marshall. We are packing up the cabinet and brass pieces today. We should leave here by around 8:00 on Monday morning and see you by 11:00 or so. FYI, in case you want to research it, and in case we need it later, the Westinghouse part number for the flyback is:

V-12977-C1

We never know what might show up out there and it would be a very, very good thing to have a spare, if possible. Before I can do anything on this set I will be building a bigger workbench. So as soon as the cabinet is in your hands I will have the space to press on. I have done some visual examination especially around the high voltage and flyback area and learned that the wiring around all of the rectifier sockets is very poor so that will have to be addressed early on in the restoration stage, after I get the power supply somewhat working. Also, my plan is to eliminate the filament wiring for the H.V. rectifiers and convert them from the original 3A3 tubes to solid state devices such as ECG508 Sylvania/Phillips devices. I am on a mission to find QTY 3 of those now. The focus rectifier tube will also be replaced with a solid state device of some type as well. By doing these modifications it not only eliminates vacuum tube heat, it also eliminates a lot of unnecessary wiring that has the potential to cause arcing which of course is very undesirable.


See you tomorrow.

Okay, see you tomorrow. We will place the cabinet in the garage as I will be taking it to our community wood shop for refinishing. I will post this in VK in hopes of a lead. Sad about Senator McCain.
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  #33  
Old 08-26-2018, 01:57 PM
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Hey Marshall,

You certainly have found a treasure in that fellow restoring your Westy chassis. Assume the same guy that restored your 21CT55. If possible this will be an even more interesting restoration. Look forward to following the progress and the back & forth between you and your tech you post here on VK.

Regards,
-Steve D.
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  #34  
Old 08-26-2018, 02:13 PM
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Steve, I’m very lucky to find Mike. We met in 2011 and he restored 4 other sets for me. We’ve become good friends.

I will be restoring the cabinet and brass pieces at our workshop.
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  #35  
Old 08-27-2018, 05:06 PM
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In my garage today. Soon, I will be taking the cabinet to our community workshop for refinishing.





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Last edited by etype2; 08-27-2018 at 06:52 PM. Reason: Missing word
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  #36  
Old 08-27-2018, 10:53 PM
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Thanks to the gentleman offering a R-3A3. Mike will contact you.

We found a cabinet number and serial numbers on the tag glued to the inside of the cabinet.







I don’t know what the numbers represent.
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Last edited by etype2; 08-27-2018 at 11:02 PM.
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  #37  
Old 08-28-2018, 06:39 AM
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Two horizontal output tubes. Two dampers. Three HV rectifiers. Three 5U4s.

The Authorized Westinghouse Service Man must have been a busy guy.
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  #38  
Old 08-28-2018, 12:45 PM
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I've always found it educational to look at the grime surrounding the knobs. The more grime, the more often this particular control was adjusted. All three of the hold controls look relatively clean so they weren't adjusted frequently. On the other hand, the convergence control looks like it was adjusted very often. Since the hue control is in the rear, we don't have any way to gauge how much it has been adjusted.

Speaking about the hue control, I don't know if it is a good idea trying to move the control to the front panel. The hue is adjusted by running a slug up and down in a coil form. Occasion adjustment might be OK, but daily adjustment or adjustment with every program might subject the coil to undue wear and tear.

Last edited by Tom9589; 08-28-2018 at 04:06 PM.
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  #39  
Old 08-29-2018, 02:06 PM
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Tom9589,

I’m leaning to plan B in regard to the hue control. Thinking about it, a hole would be required to be drilled in the pencil box materially changing the visible appearance of the set.
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  #40  
Old 09-07-2018, 03:22 AM
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The Beginning

SEPTEMBER 6, 2018
Due to the enormous Westinghouse chassis, Mike rebuilt his work bench to accommodate it. Here you see the main and sub chassis. I’ve seen Mike’s test equipment which are not shown in these photos, and it looks like these photos were taken shortly after completion of the bench. Power supply parts have been ordered and the restoration begins.

From Mike:

“The “beginning”. The bench is complete with power strip and overhead shelf for test equipment. The giant color chassis fits the new bench well. I noticed that the copper plate cover that I retrieved from the cabinet is not the one that I thought it was. It is actually the one for the bottom of the flyback area so we still need to find out if the original is available from ETF. I have allowed room on the new bench for yet another “jig tube” for when I get serious about testing the operation of the chassis after I get the power supply and sweep circuits going. I will be using the oscilloscope for much of the early testing of the power supply and sweep circuits. And I will pay especially close attention to safety of the flyback transformer.

Mike”
I spoke with Steve and the missing panel from the flyback box was not left behind at the ETF.
Tap on images for full view. This page blurs the images, so go here for full view. https://visions4netjournal.com/westinghouse/

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Last edited by etype2; 09-07-2018 at 03:29 AM.
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  #41  
Old 09-14-2018, 04:43 AM
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Nothing Major

UPDATE, SEPTEMBER 13, 2018
Nothing Major.
From Mike: I hooked up a variac to the chassis a couple of days ago and started it at 25 volts. Then about 5 minutes later I set it to 50 volts and watched the power supply tubes start conducting. They are a set of 5U4’s and there are 3 of them for the different voltages that form the power supply. The purpose of this exercise is to determine the exact running voltages that were originally designed in to the system using the 5U4 vacuum tubes. I got the voltage up to the nominal 120 VAC after many small steps and I got smoke from one of the resistors in the power supply. NOT a surprise at all. The reason for the smoke is an “open” capacitor in the power supply section of the circuitry. As it turns out, Westinghouse made this chassis such that the “power supply” is not limited to the chassis below in the cabinet. That chassis is only the first stages of the supply, which is rectification and “preliminary” filtering of the pulsating DC that is created from the rectifier tubes. There are a number of places in the chassis where they placed “redundancy” filtering to make sure that he DC was always pure everywhere in the system. I will be doing a lot of re-capping as a result of diagnostics in an effort to methodically bring this thing back to life. Once I determine what the “actual” operating voltages are, I will be installing solid state rectifiers in place of the 5U4’s and then applying resistance values in the system to reproduce the proper and “original” DC supply values. This placing of resistance values is necessary due to the fact that the solid state rectifiers are much more efficient than the original 5U4’s that are very inefficient by comparison.

I just placed a very large order for capacitors so I can press on to the next phases.

Regards, Mike.
Author: No photos on this one.
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  #42  
Old 09-14-2018, 02:18 PM
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UPDATE, SEPTEMBER 14, 2018
I live in a retirement community which has its own wood and metal shop. Today friends helped move the Westinghouse cabinet and we drove it to the wood shop.



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  #43  
Old 09-14-2018, 03:01 PM
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Make sure to keep it under watch so no old ladies talk their husband into making it into a book case...
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  #44  
Old 09-14-2018, 05:44 PM
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Talking

Will do, and my wife said “not another one?!”
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  #45  
Old 09-14-2018, 05:57 PM
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Lol.
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