On Mar 18, 2005, at 11:46 AM, Jack Brindle wrote:
Don and I have extensively discussed the use of the microphone 5 volt
line. I fully agree with his strong suggestion to not use it. In my
case I found problems with RF Feedback that I have been able to
directly associate with my use of the
I have a strange one for the group.
I use a TigerTronics SignaLink for PSK. Yesterday I
set the jumpers up to use it on the K-2. The interface
can get it's power from the mic jack. The manual
states that the unit draws 10 ma and I've used it this
way on my IC-735. When I tried power up the
Howard,
If your SignalLink interface has large capacitors on its voltage input line,
the answer is YES - it will draw significantly more than 10 ma when you turn
the switch on.
YES it is likely that the SignalLink is causing the +5 volt rail on the
front panel and Control board to drop long
Don is essentially right as to what is happening, although the MCU is
not being scrambled. The 5A line is connected directly to the
18C452's reset line (MCLR). When 5A drops below about 4.5 volts for at
least 200 microseconds, it triggers a reset for the microcontroller. It
doesn't take
4 matches
Mail list logo
