[TRLog] Using W9XT DVK with keyer paddles

[LarryX Tyree contractor for brentc]

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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