[NSRCA-discussion] Trainer box frequency interference

[Tony]

IF the wrong buddy box cord is use that does not "kill" the RF from the
trainer box, it is possible.  Power is provided from the master box to the
trainer via the buddy cord, but a line is used to disable the RF from the
buddy box.


Tony Stillman, President
Radio South, Inc.
139 Altama Connector, Box 322
Brunswick, GA  31525
1-800-962-7802
www.radiosouthrc.com

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of J N Hiller
Sent: Wednesday, October 28, 2009 8:04 PM
To: NSRCA Mailing List
Subject: [NSRCA-discussion] Trainer box frequency interference

Question for Tony
I have herd of a transmitter being used as a trainer box transmitting a
signal while turned off. Today I witnessed the condition. While starting my
airplane a club member was preparing to fly with a buddy box. The non
primary transmitter (buddy box) was on my frequency and caused interference
even though it was turned off, luckily I hadn't gotten started yet and
noticed the interference. As a test we pulled the crystal from the buddy box
TX being used which stopped the interference.
The primary TX was on another frequency and the buddy box TX was on my
frequency but of a different brand than their primary TX.
If you would please explain how this is possible it may save someone's
airplane and possibly some hard feelings. I the future the club members will
just get both frequency clips, but how many more are out there. We were
lucky today.
I was about to upgrade to 2.4 but the dentist the $$ yesterday.
Thanks
Jim Hiller
Spokane WA.


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