hummmmmmmm - diyAudio
Go Back   Home > Forums > General Interest > Everything Else

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 11th October 2003, 10:10 AM   #1
peterr is offline peterr  Netherlands
diyAudio Member
 
peterr's Avatar
 
Join Date: Apr 2002
Location: Amsterdam
Default hummmmmmmm

Yes, I am desperate:

I am having big problems with groundloop hum through the cable antenna connection of my tuner. It is so bad that it is impossible to listen to the radio. I tried connecting the antenna ground to earth ground, this helped a little but not nearly enough.

does anybody know how to solve this?
__________________
Keep an open mind. It helps.
Peter
  Reply With Quote
Old 11th October 2003, 10:33 AM   #2
Netlist is offline Netlist  Belgium
diyAudio Moderator Emeritus
 
Netlist's Avatar
 
Join Date: Jan 2003
Did you try with a small new cable directly connected to the wall?

/Hugo
  Reply With Quote
Old 11th October 2003, 01:19 PM   #3
jam is online now jam  United States
diyAudio Member
 
jam's Avatar
 
Join Date: May 2001
Location: Auburn, CA, USA
Peter,

You need an isolation transformer that breaks your ground connection to your antenna. Several companies make them. (Tributaries is one)

An easy way to make one is use two 75ohm to 300ohm converters (impedence matching transformers) and hooh up the 300 ohm leads togther. There will be some insertion loss, but a quick solution none the less.

Regards,
Jam
  Reply With Quote
Old 11th October 2003, 02:36 PM   #4
moamps is offline moamps  Croatia
diyAudio Member
 
Join Date: Oct 2002
Location: Croatia
Hi,

insert two ceramic caps 10 to 100nF between receiver connector and antenna wall connector.

regards
Attached Images
File Type: jpg anntena.jpg (5.1 KB, 94 views)
  Reply With Quote
Old 12th October 2003, 07:04 AM   #5
peterr is offline peterr  Netherlands
diyAudio Member
 
peterr's Avatar
 
Join Date: Apr 2002
Location: Amsterdam
Thanks for the suggestions.
I will try them and see if it helps.
Thanks.
__________________
Keep an open mind. It helps.
Peter
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



New To Site? Need Help?

All times are GMT. The time now is 12:49 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2