¿ªÔÆÌåÓý

?BITX keyer pull up resistor without jack #ubitx


 

At this point I have no intention of using my ?BITX for CW.? I understand I still need the pull up resistor between pins 2 and 3 on the Raduino.? I am trying to eliminate as many unnecessary wires as possible.? Couldn't I just connect a 4.7k resistor between the pins without using the jack or am I missing something?


 

¿ªÔÆÌåÓý

yup

?

?

Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ

?

Owner - Operator

Big Signal Ranch ¨C K9ZC

Staunton, Illinois

?

Owner ¨C Operator

Villa Grand Piton ¨C J68HZ

Soufriere, St. Lucia W.I.

Rent it:

Like us on Facebook!

?

Moderator ¨C North American QRO Group at Groups.IO.

?

email:? bill@...

?

?

From: [email protected] [mailto:[email protected]] On Behalf Of Doug W
Sent: Saturday, April 28, 2018 5:55 PM
To: [email protected]
Subject: [BITX20] ?BITX keyer pull up resistor without jack #ubitx

?

At this point I have no intention of using my ?BITX for CW.? I understand I still need the pull up resistor between pins 2 and 3 on the Raduino.? I am trying to eliminate as many unnecessary wires as possible.? Couldn't I just connect a 4.7k resistor between the pins without using the jack or am I missing something?


Virus-free.


 

Here's what I ended up doing.? Might be useful for anyone not wanting the keyer jack and an easy way to go back later.? I folded over about 5mm of the bottom of each leg of the 4.7k resistor to bulk them up.? Then i crimped on molex kk terminals on each leg.? I put heat shrink on each leg and then popped the resistor in the digital connector where the wires for pins 2 and 3 previously resided.? After double checking with my DVM I fired her up and it's all good.? I figured it is best to keep the rig as low drag as possible.


 

Hi Doug,?

I just tack soldered the resistor to the back of the connector, so the wires could be completely removed from the harness if desired.?

-Justin N2TOH?


 

That is certainly a faster, easier solution.? I had a bag of connectors in front of me and must have been in the mood for a craft project.? As they say, to a man holding a hammer every problem looks like a nail...


Marko Pavlicevic
 

Also, you can add SMD 1205 version of 4.7K on the Raduino board.