Actually, most of the RS-232 manual switches that I have disassembled
have 25 or more poles on the rotary switch, and they have plenty of
positions too, but only two positions are available until you break off
additional tabs on the switch.
73,
Don W3FPR
On 11/26/2012 9:42 AM, Ed Muns wrote:
Dick K6KR has covered the issues well. To expand Dick's advice on the
RS-232 switch, here is some more detail.
microHAM products that provide K3 Serial CAT control via their USB
connection to your PC cannot be used with the K3 Utility for firmware
upgrades. You will need to use a direct Serial connection to your PC with
the K3 Utility. That means disconnecting the microHAM Serial connection
from the K3 and then connecting a Serial cable to your PC. (The latter can
be a Serial COM port on your PC or via a USB-Serial adapter such as Dick
describes below). Therefore a simple manual switch is handy so you can
switch between CAT control with the microHAM box and K3 Utility usage via
the direct Serial connection. Connect the common DB9 port of the switch to
the K3 Serial connector and then each of the switched DB9s to the microHAM
K3 Serial DB9 and the direct Serial DB9 cable respectively. This assumes
that the "2x1 RS232 manual switch" is what we think it is ... a SPDT DB9
switch.
Ed W0YK
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