Videokarma.org

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

Notices

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #1  
Old 09-21-2016, 10:41 PM
Radiotronman's Avatar
Radiotronman Radiotronman is offline
VideoKarma Member
 
Join Date: May 2015
Posts: 588
Interesting, that makes sense, thanks!
Reply With Quote
  #2  
Old 10-12-2016, 12:56 PM
Radiotronman's Avatar
Radiotronman Radiotronman is offline
VideoKarma Member
 
Join Date: May 2015
Posts: 588
Just ordered my focus potentiometer to replace the one on my set. It's a 1k, 25 watt wirewound control. Surplus Sales of Nebraska had them for only $8. I also replaced the .05@1000v cap and the .035@1000 cap; since I had them on hand. I write down every cap I need to order, over 40 paper caps and 20+ electrolytics. Does anyone know what to replace the paper tubular caps in the chassis listed as 1.6 ohm caps? What are these? I've never seen them in sets before and what should I replace them with? They are like dyed on the sams as C4 and C5.
Attached Images
File Type: jpg image.jpg (118.7 KB, 21 views)
Reply With Quote
  #3  
Old 10-12-2016, 01:33 PM
Kevin Kuehn's Avatar
Kevin Kuehn Kevin Kuehn is offline
Workin' Late Again
 
Join Date: Jan 2011
Location: WI
Posts: 3,976
Shown on the schematic as polarized, so I suspect they are large mfd, low voltage electrolytic type? Apparently 1.5 ohms is their impedance at 120 hz. Using the below calculator I came up with 880 mfd to get close to 1.5 ohms. Looking at that Aerovox part number(PRS6/1000) I'm going to guess they're 1000 mfd @ 6v. I'll see if I can find that AV number in an old catalog.

http://www.allaboutcircuits.com/tool...ce-calculator/
Reply With Quote
  #4  
Old 10-12-2016, 01:46 PM
Kevin Kuehn's Avatar
Kevin Kuehn Kevin Kuehn is offline
Workin' Late Again
 
Join Date: Jan 2011
Location: WI
Posts: 3,976
Here's a Radio Master listing for those Aerovox PRS series. Oddly they don't list the complete part numbers. Maybe check and see if the 1000 mfd @ 6v fits the physical dimensions of what's in there.

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 08:46 PM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2026, Jelsoft Enterprises Ltd.
©Copyright 2012 VideoKarma.org, All rights reserved.