PCS Electronics PCS Electronics - home page PCS Electronics  
RegisterSearchFAQAM & FM Radio transmitters shop UsergroupsLog in
how to avoid Dopler DF

 
Reply to topic    PCS-Electronics Forum Index » FM transmitters View previous topic
View next topic
how to avoid Dopler DF
Author Message
stylzmovement
Compulsive poster:)
Compulsive poster:)


Joined: 11 Oct 2003
Posts: 142

us.gif

Post how to avoid Dopler DF Reply with quote
what do you guys do to avoid the FCC and DTI direction finding equipment ?
Wed Mar 17, 2004 11:49 am View user's profile Send private message
RadioMan
Regular poster
Regular poster


Joined: 03 Nov 2003
Posts: 48

Post Reply with quote
I've only been on-air for 3 & 1/2 months so I'm not a good example. But what I have done is this:

1) Make sure my frequency is open (no one for at least 70 miles, about a hours drive, from my location). I also found a frequency that has 1st & 2nd adjancent frequencys open in both directions(example: center or fundamental freq at 98.1Mhz. Nothing at 97.7, 97.9, 98.1, 98.3, 98.5.
The FCC requires this for LPFM's. For full power commerical-type operations, they have to have 3 adjancent channels open on each side. This is a great way to make sure your not stepping on anyone else.

2) Keep the signal as clean as possible. Don't overmodulate. I use an old Sony 3/4" U-matic VCR that has an audio limiter built in. I have no use for it anymore so I just set it to input and pass my audio thru it. That way if I run my mixer (Mackie 12 channel-pretty clean itself) too hot the limiter in the VCR holds it to acceptable levels-no distortion.

3) I have checked with my neighbors to see if they are getting any interference on their TV or house radios. I don't tell them why I'm asking however. If they ask me, I just say that "I picked up some interference the other night and wanted to see if others have also."

4) I don't say anything to bring attention to myself. I try to sound as professional as the big guys. I don't say I'm a pirate or microbroadcaster, I don't use foul language, I don't use my real name, I don't give out my phone number or address (although I'd love to know if anyone is really listening), and I use logos's and call letters. The FCC (commish) has a "call letter finder" at their website. They also have a "frequency finder" that will tell you if a particular freq is open in your location. You need to know the lattitude & longitude of your exact location. It is a good idea to use calls that no one else use's. Don't idenify yourself as "KQRS" when their is a BIG "KQRS" in the midwest. (Don't use KCUF. Someone actually applied for that and the commish turned it down with no explanation needed.)

5) I know exactly how far my signal is going out. I live in a large city and I don't want to go too far. I got in my car, drove around & made a coverage map.


Anyway, those are just some of my thoughts, right or wrong.

Good luck, have fun.

Radioman
Fri Mar 19, 2004 8:28 pm View user's profile Send private message
Display posts from previous:    
Reply to topic    PCS-Electronics Forum Index » FM transmitters All times are GMT + 1 Hour
Page 1 of 1

 
Jump to: 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group