OK. As promised. My findings!
All component values were correct.
All soldering was done to the correct pads.
All the joints looked good....until....
I took a really close look at T2's leads.
On the bottom they looked great but on the top (really hard to see)
they were not bonding to the pad. Either I didn't strip off enough enamel
or shoved the lead in too far or both.
Anyway, you folks were correct. I applied a little heat, a little more
solder, waited a few seconds and voila'...
You can guess the outcome. Thanks for assist!
72,
Glen, NK1N
----- Original Message -----
From: "Glen Johnstone" <[EMAIL PROTECTED]>
To: "Ron D'Eau Claire" <[EMAIL PROTECTED]>; <[email protected]>
Sent: Monday, June 26, 2006 11:14 AM
Subject: RE: [Elecraft] Yet another KX-1 Question
Ron,
Thanks for the info. You are correct about the testing. I wouldn't have
even done my test except it 'sounded' low.
I'll be troubleshooting tonight. I may have miswound T2 or goofed on a
component sub or better yet, soldered 'em to the wrong pads. I'll post my
findings.
73,
Glen, NK1N
PS. I know you meant "origanal KX1".
Ron D'Eau Claire <[EMAIL PROTECTED]> wrote:
Glen, NK1N wrote:
I agree on the receiver sensitivity. I aligned my 2 band KX-1 with a -103
dBm signal. When I used a -73 dBm signal (standard S9), I got 4-5 bars on
the S-meter for 40 and 20. Perfect!
After building and installing the KXB3080 and doing all the RX alignments,
I find the -73 dBm signal barely lights 2 bars on 20. Hmmm.
I expect the KX1 20m circuitry was compromised to pull it down to 80m.
-------------------------------------
Just the opposite Glen.
The receiver front end circuitry was redesigned to operate very
efficiently
across the 80-20 meter range. The original KXB3080 uses a simple
capacitively-coupled input circuit. The KXB3080 mod replaces this with a
transfomer-coupled input.
I wouldn't suggest how effective looking at the "S-Meter" is for
evaluating
receiver performance. I haven't tried it. Running actual SN+N/N
sensitivity
tests, I found the end result was actually slightly *better* receiver
performance on all four bands.
Ron AC7AC
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