[Elecraft] K2: Erratic action of the Hand Key "Autodetect" function

[Sverre Holm]

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Jim Sheldon
Sent: 9. mai 2005 23:41


Picked up a couple of 5711's from our local "surplus" electronics dealer.
They appear to do the trick - hasn't glitched once since I switched out the
4148 (914) diodes.
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Good to hear that Shottky does the trick!

The PIC16F77 datasheet is a bit overwhelming, see
http://ww1.microchip.com/downloads/en/DeviceDoc/30325b.pdf, but on page 125
it has the Input Low Voltage condition. Among them one can read "Input Low
Voltage is minimum VSS and maximum 0.8V". Then it should not be a surprise
that an input voltage in the 0.7-0.8 Volt range sometimes may cause erratic
behavior.

73

Sverre
LA3ZA
http://www.qsl.net/la3za/