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: [1]   Go Down
  Print  
Author Topic: Why is ALC A Negative Voltage?  (Read 1298 times)
HA5RXZ
Member

Posts: 380




Ignore
« on: October 03, 2006, 05:44:18 AM »

Something I've often wondered but never thought of asking. When an amplifier supplies an ALC signal why is it always negative with respect to chassis?

HA5RXZ
Logged
K0BG
Member

Posts: 10248


WWW

Ignore
« Reply #1 on: October 03, 2006, 08:06:14 AM »

A way back, when tubes were king, the ALC voltage was derived from the grid bias which was negative with respect to ground. It stuck.

Alan, KØBG
www.k0bg.com
Logged

Pages: [1]   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!