On Sep 1, 2012, at 9:02 PM, Don Wilhelm w3...@embarqmail.com wrote:
As for your wattmeter problems, I suspect that the diodes D16 and D17 may be
half bad. Yes, that is rare, but possible - they have been damaged enough
to change their characteristics but not make them either open or
On Sep 1, 2012, at 9:02 PM, Don Wilhelm w3...@embarqmail.com wrote:
Bill,
I am puzzled why a bad EL5146C would cause an INFO 080 problem. INFO 080
normally is the inability of the MCU to properly communicate with another
firmware processor. While it is entirely possible that the EL5146C
Bill,
Yes, you can substitute 1N4148 diodes - they are not as flat with
respect to frequency and the response at very low powers will not be as
accurate, but other than that, they will work just fine.
73,
Don W3FPR
On 9/3/2012 12:51 PM, Bill Coleman wrote:
I have some 1N5711's on order from
My KPA100 has been giving good service for nine and a half years. Back in July,
it was giving me an INFO 080 issue, which I tracked down to a defective U6 -
EL5146C on the KPA100. I've successfully replaced this chip, and now the KPA100
is responding.
Because of the part replacements, I have
Bill,
I am puzzled why a bad EL5146C would cause an INFO 080 problem. INFO 080
normally is the inability of the MCU to properly communicate with
another firmware processor. While it is entirely possible that the
EL5146C was dragging down the output of the +5v regulator and causing
the KPA100
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