Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Early B&W and Projection TV

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #136  
Old 12-08-2017, 07:20 PM
Crist Rigott Crist Rigott is offline
VideoKarma Member
 
Join Date: Oct 2015
Location: Waxahachie, TX
Posts: 1,506
Quote:
Originally Posted by Crist Rigott View Post
A very generous member of this Forum gave me a B&K 415 and a 1077B along with most of the cables. I wanted to use the 415 to align this set and after making up the missing cable and converting the mic connectors to BNC, I found out that the 415 doesn't work on the "sweep" function. So over the next week I'll dive into that to see if I can get it going. I'll make a post in the Test Equipment section when that happens.
I started the repair of the 415 located here:

http://www.videokarma.org/showthread...49#post3193149
Reply With Quote
  #137  
Old 12-08-2017, 07:30 PM
Kevin Kuehn's Avatar
Kevin Kuehn Kevin Kuehn is offline
Workin' Late Again
 
Join Date: Jan 2011
Location: WI
Posts: 3,824
Quote:
Originally Posted by Crist Rigott View Post
Yeah, a typo. I'll correct it. It should be 39.3C.
So I'm still not understanding why you said:

"the can and sleeve actually acts as a barrier to the surrounding heat of the chassis as shown by about a 3 to 5 degree difference between the can being on or off."

Looks like in each case they ran cooler without the can, but not by a long shot?
Reply With Quote
  #138  
Old 12-08-2017, 08:04 PM
Crist Rigott Crist Rigott is offline
VideoKarma Member
 
Join Date: Oct 2015
Location: Waxahachie, TX
Posts: 1,506
Quote:
Originally Posted by Kevin Kuehn View Post
So I'm still not understanding why you said:

"the can and sleeve actually acts as a barrier to the surrounding heat of the chassis as shown by about a 3 to 5 degree difference between the can being on or off."

Looks like in each case they ran cooler without the can, but not by a long shot?
What I was trying to say was that the can absorbs some surrounding heat from the chassis, thus it is hotter than no can at all and measuring just the tops of the E-caps themselves. At least I think that what I meant to say.
Reply With Quote
  #139  
Old 12-08-2017, 09:18 PM
Kevin Kuehn's Avatar
Kevin Kuehn Kevin Kuehn is offline
Workin' Late Again
 
Join Date: Jan 2011
Location: WI
Posts: 3,824
Gotcha. Thank you for posting the data, it's very interesting. Like you said there's quite a margin considering their rated life expectancy. It would be interesting to see how much warmer they run once the chassis is back in the cabinet, although a bit more difficult to aim the heat seeking light beam. What we need is a bunch of those remote temp sensors like folks are using on their telemetry equipped RC planes these days.
Reply With Quote
  #140  
Old 12-09-2017, 08:29 AM
Crist Rigott Crist Rigott is offline
VideoKarma Member
 
Join Date: Oct 2015
Location: Waxahachie, TX
Posts: 1,506
Quote:
Originally Posted by Kevin Kuehn View Post
Gotcha. Thank you for posting the data, it's very interesting. Like you said there's quite a margin considering their rated life expectancy. It would be interesting to see how much warmer they run once the chassis is back in the cabinet, although a bit more difficult to aim the heat seeking light beam. What we need is a bunch of those remote temp sensors like folks are using on their telemetry equipped RC planes these days.
Yeah we used thermocouples taped in places all over avionics packages at work. Then we had a computer log each one every second or so IIRC. Very detailed and very eye opening as to where the heat goes. Of course we would need to come up with a custom can that would allow the thermocouple wire to exit the re-stuffed E-Cap. We could gather a ton of data and come up with a 15 page report. But then would we really do anything different than what we are doing today?
Reply With Quote
Audiokarma
  #141  
Old 12-09-2017, 12:17 PM
Kevin Kuehn's Avatar
Kevin Kuehn Kevin Kuehn is offline
Workin' Late Again
 
Join Date: Jan 2011
Location: WI
Posts: 3,824
Honestly I so seldom watch my few restored TV's that component lifespan has never been a concern. Seems that most of us end up with a few favorite watchers, but for the most part there's not enough hours in the day once the collection grows past a dozen or so.
Reply With Quote
  #142  
Old 12-09-2017, 08:53 PM
Crist Rigott Crist Rigott is offline
VideoKarma Member
 
Join Date: Oct 2015
Location: Waxahachie, TX
Posts: 1,506
I decided to start work on the cabinet today. I removed the bezel and started to clean it up. I noticed that the "brass" area around the On-Off-Volume knob was quite well worn. It even has the thin plating worn off.



When cleaning the door the plating rubbed off with very little rubbing. And I mean very little. I then took all of the "plating" off. I thought Philco was the only one that skimped on the thickness of the plating. It looks like the aluminum door is bright nickel plated? Probably needs to be that way before it was brass plated. I guess I'll have to find a plating company to plate the door and the knob pieces. As a matter of fact, the bezel brass plating is gone along the most outer edge from repeated cleaning through the decades. I'll get an estimate on getting it all re-plated bright brass. Might even take my Predicta parts along too.

Reply With Quote
  #143  
Old 12-10-2017, 12:46 AM
Kevin Kuehn's Avatar
Kevin Kuehn Kevin Kuehn is offline
Workin' Late Again
 
Join Date: Jan 2011
Location: WI
Posts: 3,824
Looks nice in nickle, more modern. I've seen a lot of those get painted too.
Reply With Quote
  #144  
Old 12-10-2017, 09:25 PM
irext's Avatar
irext irext is offline
VideoKarma Member
 
Join Date: Dec 2016
Posts: 69
You do lovely work. It's almost a shame to put that chassis in a cabinet and hide it from view.
Reply With Quote
  #145  
Old 12-11-2017, 07:50 AM
John Marinello's Avatar
John Marinello John Marinello is offline
<-- "Byron"
 
Join Date: Dec 2005
Location: Lake Murray, SC
Posts: 1,055
I believe that's only a tinted lacquer that was applied to the door. Be careful, the bezel is the same way.
Reply With Quote
Audiokarma
  #146  
Old 12-11-2017, 08:32 AM
Crist Rigott Crist Rigott is offline
VideoKarma Member
 
Join Date: Oct 2015
Location: Waxahachie, TX
Posts: 1,506
Quote:
Originally Posted by John Marinello View Post
I believe that's only a tinted lacquer that was applied to the door. Be careful, the bezel is the same way.
John,
That makes sense. Yeah, the bezel is showing signs of the lacquer is rubbed off along the sharp edges. I look and see if I can buy some tint. We'll see.
Thanks.
Reply With Quote
  #147  
Old 12-11-2017, 10:49 AM
Eric H's Avatar
Eric H Eric H is offline
Administrator
 
Join Date: Jun 2002
Location: So. Calif
Posts: 11,565
Perhaps one of these Mohawk Toners might do the trick?

http://www.mohawk-finishing.com/cata...asp?ictNbr=171
Reply With Quote
  #148  
Old 01-19-2018, 02:31 PM
Crist Rigott Crist Rigott is offline
VideoKarma Member
 
Join Date: Oct 2015
Location: Waxahachie, TX
Posts: 1,506
I'm holding off on working on the cabinet for a bit because of the weather.

I did get a replacement flyback though. It is a Merit HVO-53. Came with instructions. Nice.



I did have to drill/file new notches to mount the new flyback.





I followed the instructions as to the wiring and reassembled the HV cage.



Then the moment of truth. It works very well. I'm getting 12.5Kv and it is dead silent! No more crackling sounds.
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 11:57 AM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
©Copyright 2012 VideoKarma.org, All rights reserved.