Mike,
I have not done it, but I too can read schematics - I checked th eKIO2
interface connections and the KPA100 AUX I/O pinout to resolve any
conflicts.
In this particular case, you should believe the schematic - the XV
series owners manual text is incorrect (Ron, if you are listening, take
note).
The 12CTRL signal is needed on pin 8 of the XV144 DE-9 (but it need not
be 12 volts, the ACC pin 7 output will drive this signal just fine.
The 8R input to the XV144 is on pin 9 - this does not have to be 8 volts
for the XV144 operation, it only must be a low level during transmit, so
the ACC Pin 10 - keyout signal will work FB.
Yes, the ground (common return) lines connect to XV144 DE-9 pin 1, and
either K3 ACC pin 5 or 12 may be used at the other end.
73,
Don W3FPR
Mike Downs wrote:
I have just completed an Elecraft XV144 transverter and it is working with my
K2. Now I want to use it with my K3, but I am uncertain how to wire the
connector cable at the K3 end. I think the correct connections are as follows
using the ACC connector on my K3:
ACC Pin 2 - Auxbus: connect to green wire - Pin 6 on DB-9
ACC Pin 7 - K3 on signal: connect to red wire - Pin 8 on DB-9
ACC Pin 10 - Keyout: connect to black wire - Pin 9 on DB-9
ACC Pin 5 or 12 - Gnd: connect to bare wire - Pin 1 on DB-9
This is correct as far as I can determine from looking at the XV144 schematic on page A-5 of the XV
manual. However, in reading the circuit description on page 23 of the manual there are
discrepancies. For example, in paragraph 3 on page 23 it says "+12 volts is supplied via pin 9
of the DB-9 connector to Q5." Not so according to the schematic - it is pin 8. Also, in the
7th paragraph on page 23 it says "when the 8R signal at pin 6 of the DB-9 interface goes to a
logic low" it switches between receive and transmit mode. Not so according to the schematic -
it is pin 9. So, which do I believe, the schematic or the text?
Can someone who has successfully interfaced the K3 with an Elecraft XV
transverter please tell me the correct pins to use on the ACC connector? Thanks.
Mike, ks7d
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