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HelicopterRadio - Servo - Gyro - Gov - Batt › Need help with Tx & Rx frequency
03-13-2003 07:41 AM  14 years agoPost 1
Hayes

rrVeteran

Moab, Utah

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Hi Guys,

I was wondering what the best way to test my Tx & Rx frequency
strength. (Other then a rang check)

NewEnglandHeli.com
MagnumFuels.com
Team NEH
MWH Team Pilot

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03-13-2003 12:51 PM  14 years agoPost 2
SteveH

rrProfessor

Texas

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Don't understand your question as frequency is measured in Hertz, or the old Cycles Per Second, but you mentioned strength, which would indicate you want to measure the transmitter output power and your receiver's sensitivity.

Doens't really matter. Either way you need to get your equipment to someone with the test equipment and know how to test and if need be align the system. The best would be to send it in to the manufacture's certified repair center. Hope this helps.

SteveH

The government cannot give you anything without first taking it from someone else.

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03-13-2003 08:52 PM  14 years agoPost 3
Hayes

rrVeteran

Moab, Utah

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I phrased that wrong, I am looking to test signal strength and
receiver's sensitivity.
What I have done is put a base loaded antenna on my Rx and a
base loaded on my Tx. When they had the stock antenna's they
range check at 150 feet, now they only go to 100 feet.
(Is that ok or not)

NewEnglandHeli.com
MagnumFuels.com
Team NEH
MWH Team Pilot

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03-13-2003 11:36 PM  14 years agoPost 4
SteveH

rrProfessor

Texas

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Marc,

It's not untypical to loose some distance in the range test when going to base loaded antennas. I have no experience with transmitter base loaded antennas, but I did some tests a while back with a Deans base load antenna against a full length wire and the reduction was only about 25%. You are talking about 1/3 loss of distance and this COULD be because of both TX and RX base load antennas.

The RX mounting location, I have found, is important. Try to mount the antenna so the base load, which is now the majority of your antenna, is away from all other metalic and electronic parts.

I think I would also discuss this with the manufacturers of your antennas.

Good Luck,
SteveH

The government cannot give you anything without first taking it from someone else.

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03-14-2003 12:25 AM  14 years agoPost 5
raptorkid

rrVeteran

Maryland Posts:10000

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If you had a base loaded antenna it is always extended.Correct? So if you fly it the heli will only go 100 feet away from you till you loose signal.Right? Range checks are done with the antenna retracted.

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03-14-2003 01:20 AM  14 years agoPost 6
Hayes

rrVeteran

Moab, Utah

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WOW!!!!!!!

I had not thought of that,,,
I think I am going to remove the power stik antenna from my TX
and reinstall the stock one and check it with the base load on
the RX and go from there.....

NewEnglandHeli.com
MagnumFuels.com
Team NEH
MWH Team Pilot

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03-14-2003 02:27 AM  14 years agoPost 7
mr.rc-cam

rrNovice

USA

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General Info on rubber ducky on the Tx: http://www.bergent.net/antenna_field_test.html

If you are only getting 100' then something is very wrong. With the rubber duck on the Tx, the ground range should be several hundred yards (perhaps 30% less than a fully extended stock Tx whip antenna).

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