Jack,
You need to put an 'exponential' symbol between those parentheses and
the 2 in those formulas - the voltage must be squared where the
formulas you included indicate multiplying by 2.
For your power output level, it *may* be a bit low. Check the output
with a 13.8 volt supply voltage -
-Original Message-
From: Jack Regan [mailto:ae...@sbcglobal.net]
Sent: Monday, March 23, 2009 5:06 PM
To: 'Jack Regan'
Subject: RE: [Elecraft] KX1 Spring Tune Up Update
Don has pointed out that the formulas I posted did not appear as superscript
2, indicating a squaring function so I
This update represents a more accurate determination of the power output AND
an adjustment of the KX1 so it would reflect these new, accurate power
measurements.
The DL1 was used to determine the power output. Some initial confusion
occured becasue the DL1's formula for calculating power is
I purchased an Elecraft DL1 because of its' linearity and the built in VDC
test points. Here is the first set of test data.
Notes:
The SCOPE PWR was Vp-p * .3535 = Pav
The TP1 PWR was ((V * 1.414) + 0.15))2 / 50 = P(watts)
BAT: 1) DVM 11.93 UNLOADED 2) DVM 11.90 KX1 RECEIVE 3) KX1 11.6 KX1
Jack,
First, the 10 MHz 'scope probe is your limiting factor on your 'scope
measurements. What that 10 MHz rating means is that at 10 MHz, the
response of your probe is down -3dB from the actual voltage. If the
probe's rating is 'right on the money', the actual voltage measured at
10 MHz
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