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

   Home   Help Search  
Pages: [1]   Go Down
  Print  
Author Topic: RFI?  (Read 3292 times)
KC2FZN
Member

Posts: 44




Ignore
« on: February 15, 2014, 04:51:02 PM »

I'm operating JT65 with a kenwood 450 into a signalink and the antenna is a OCF diapole fed with coax at 35 feet. When Jt65 transmits on the 20 meter band my computer screen locks up and there is a steady tone emitting from the motherboard. All other bands are fine using JT65. This has just occured withing the last month. I have been operating on the 20 meter band with jt65 for the past two years with no problems. When setting the power output with the signalink as little as 5 to 10 watts out causes this problem. Any suggestions and solutions will be appreciated.
Logged
K3LRH
Member

Posts: 58




Ignore
« Reply #1 on: February 16, 2014, 04:46:28 PM »

......try moving some wires around in the shack, particularly anything that is near the coax.  Also, check SWR.  Add more ferrites to the computer input(s)
Logged
N4UM
Member

Posts: 473




Ignore
« Reply #2 on: February 18, 2014, 10:14:41 AM »

K3LRH gave you some good advice.  You also might want to make sure your rig is well grounded to your computer with as short a lead as possible.  Also try installing snap on-ferrite RFI filters on ALL leads coming into and from your computer and your digital interface unit.  Checking SWR is also a good idea since RF may be present on the outside of your coax.  The main thing is not to give up but to keep trying different things. 
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!