[TowerTalk] Actual LP Performance vs Tribanders

[Larry Phipps]

If you use the TRX-Meter utility to do your automatic plotting, it allows for precise calibration of the S-Meter against a standard. You just need a signal source and step attenuator to do the relative calibration... or a calibrated generator to do absolute calibration. The procedure creates a table of corrected values for each S-unit from S1 to S9, plus each 10dB above S9. My TS-850S it turns out, is a pretty constant 4dB/S-unit from S1 to S9.

The TRX-Meter utility can do a very nice job of plotting VHF/UHF beams where height above ground is high. It should also work reasonably well with HF beams that are VERY close to your qth.

Larry N8LP



----- Original Message ----- 
From: Pete Smith 
To: N2TK at arrl.net ; towertalk at contesting.com 
Sent: Monday, June 28, 2004 7:35 AM
Subject: RE: [TowerTalk] Actual LP Performance vs Tribanders


At 07:27 AM 6/28/2004, N2TK wrote:
>Why not leave the power constant and use a switchable attenuator to keep the
>s-meter constant? That would seem to give more accurate and more repeatable
>readings.


Sure, if you have one.  Would also save having to do the conversion from 
power ratios to dB.

73, Pete N4ZR
The World HF Contest Station Database
was updated on June 5, 2004
2728 contest stations at
www.pvrc.org/WCSD/WCSDsearch.htm  

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