Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

donate to eham
   Home   Help Search  
Pages: Prev 1 [2]   Go Down
  Print  
Author Topic: Heathkit HW-16 Circuit Breaker  (Read 9507 times)
KG8LB
Member

Posts: 399




Ignore
« Reply #15 on: March 24, 2016, 03:32:46 AM »

The little glass encased breaker was pretty common in electrical devices of that era . Just a set of contacts on a bi-metal arm . Current passing through the bi-metal would heat it. When the heat level was sufficient , the arm would curl away and open the circuit . Most looked like oversized NE-2 lights . You can replace it with a fuse or a standard panel mount breaker . 
  Trouble shooting over-current problems is often aided with a Variac and a plug in Ammeter . Bring up the voltage slowly , watch the current . Disconnect suspect components (chokes, caps etc)  and re-check the current . Usually , the problem is quickly located. It is the last component you opened or something downstream from there.
Logged
KD0REQ
Member

Posts: 1795




Ignore
« Reply #16 on: March 28, 2016, 12:42:16 PM »

can't beat 1920s tech for quick smoke/no-smoke testing.  take a light bulb socket, wire in series with the black wire of an outlet, plug into that.  if the light bulb glows full-brightness for any period of time, you have an overload issue.   full bright all the time, primary short in the transformer or wiring.
Logged
Pages: Prev 1 [2]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!