Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Transistor Radio

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #1  
Old 05-16-2022, 04:29 PM
Dave A's Avatar
Dave A Dave A is offline
VideoKarma Member
 
Join Date: Aug 2003
Location: SE Pennsylvania
Posts: 1,529
Exclamation Channel Master/Sanyo xstr

Taking a stab at a CM 6 xstr radio. 5 caps at 30mf/6v and not polarity stamped. Is the black dot +/-? Meter thinks -. Not sure how the exclamation got included. Not needed
Attached Images
File Type: jpg thumbnail.jpg (45.7 KB, 45 views)
__________________
“Once you eliminate the impossible...whatever remains, no matter how improbable, must be the truth." Sherlock Holmes.

Last edited by Dave A; 05-16-2022 at 04:44 PM. Reason: text
Reply With Quote
  #2  
Old 05-27-2022, 01:24 AM
vortalexfan vortalexfan is offline
VideoKarma Member
 
Join Date: Sep 2018
Location: Northern Indiana
Posts: 1,848
Quote:
Originally Posted by Dave A View Post
Taking a stab at a CM 6 xstr radio. 5 caps at 30mf/6v and not polarity stamped. Is the black dot +/-? Meter thinks -. Not sure how the exclamation got included. Not needed
I second the (-) mark notion that you were thinking, because most electrolytic capacitors I've ever seen (with a few rare occasions) almost always have the negative polarity marked on them and the positive polarity unmarked.
Reply With Quote
  #3  
Old 05-29-2022, 07:33 PM
Blast's Avatar
Blast Blast is offline
blast, blast...
 
Join Date: Jun 2007
Location: Kansas City
Posts: 217
I had my way with a Channel Master model 6515 a few years back. 10 capacitors and it plays like a champ!
Attached Images
File Type: jpg IMG_6607 edit.jpg (128.7 KB, 16 views)
File Type: jpg IMG_6623 edit.jpg (54.6 KB, 18 views)
Reply With Quote
  #4  
Old 05-29-2022, 07:42 PM
Blast's Avatar
Blast Blast is offline
blast, blast...
 
Join Date: Jun 2007
Location: Kansas City
Posts: 217
Forgot to mention: The original capacitors in mine had black dots but, as I remember, the "+" was also well marked on top.
Attached Images
File Type: jpg IMG_6627 edit.jpg (87.4 KB, 23 views)
Reply With Quote
  #5  
Old 05-30-2022, 10:58 PM
probnot's Avatar
probnot probnot is offline
15.7Khz squeal with joy
 
Join Date: Oct 2020
Posts: 62
I have that radio under the Sanyo name and also got confused on the polarity of the caps when replacing them.

I ended up measuring the voltage across a few and confirmed the black dot was negative (-).
Reply With Quote
Audiokarma
  #6  
Old 05-31-2022, 03:50 AM
vortalexfan vortalexfan is offline
VideoKarma Member
 
Join Date: Sep 2018
Location: Northern Indiana
Posts: 1,848
I'm currently working on a mid 1960s vintage Akai AM/FM Transistor radio that the capacitors in that thing were a mish-mash of those capacitors that look like the ones that were used in these Channel Master/Sanyo radios, some Nichicon (Nippon Chemicon), and the notoriously bad "ELNA" capacitors, which the "ELNA" Caps of course flunked the ESR test on my newly acquired Analog ESR Meter, and the Nichicon caps of course passed with flying colors and the "Sanyo" caps (as I'll call them because they seem to almost always be in Sanyo made electronics from the 1960s and 1970s) were mediocre at best (they were measuring on the verge of failing.)
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 05:49 AM.



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