Gary, W9XT, has provided the following instrutions for those of
you who are using his DVK card and would like to use the same
card for the paddle inputs. This information will be in the next
manual. He is also working on a mod to support the PTT signal.
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Keyer Paddle Support
TRLog has support for using a keyer paddle through an LPT port to
send CW. These modifications allow the Contest Card to support this
feature.
Caution: Making these modifications could void the FCC class B certification
of the Contest Card. It will be your responsibility to see that proper
steps are made to prevent interference to nearby radios, TVs, etc. If
interference occurs, you must stop using this device until you correct
the problem. Furthermore, making this modification will void the warranty
if, in the opinion of Unified Microsystems, damage occurred because of
improper modifications or poor workmanship in making the changes.
1) Add a wire from U11 pin 1 to U11 pin 15.
2) Install a 10K, 1/4W 5% resistor between U11 pin 16 and U11 pin 10.
3) Install a 10K, 1/4W 5% resistor between U3 pin 14 and U 11 pin 6.
4) Add a wire from J1 (the DB-25) pin 17 to U11 pin 10 (including the
resistor added in step 2). The wire connecting to J1 will need to be
soldered to the pin on the solder side. You may wish to route and
solder both ends of this wire on the solder side.
5) Add a wire from J1 (the DB-25) pin 18 to U11 pin 6 (including the
resistor added in step 3). The wire connecting to J1 will need to be
soldered to the pin on the solder side. You may wish to route and solder
both ends of this wire on the solder side.
6) Add a wire from U11 pin 9 to U9 pin 9.
7) Add a wire from U11 pin 7 to U9 pin 7.
Modify your cable as follows:
J1 pin 17 to the DOT contact on your keyer paddle
J1 pin 18 to the DASH contact on your keyer paddle
J1 pin 5 to the COMMON on your keyer paddle.
(Note there may already be a wire connected to pin 5 if you are using the
optional record switch. Both the keyer COMMON and record switch GROUND
wires may be connected to pin 5 if both are used.
73 Tree N6TR
tree@contesting.com
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