CW Touch Keyer

 

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TROUBLE SHOOTING

 

Weak Battery

A weak battery will result in the 5V regulator loosing regulation creating erratic product performance.  A fresh new 9V battery as an average is rated at 650mAH.  This means the touch paddle product will work with one battery for over 300 hours.

 

 

Erratic paddle performance

When using any touch paddle product, be sure you have a good grounded station.  Stray  RF will can cause self or erratic keying, especially with end fed antennas or any antenna in close proximity.

What could be happening is the cable from the touch paddle product, going to your rig, can be acting as an RF counterpoise from the RF currents coming down the feed line to the radio and into the sense circuits of the touch paddle product.  This may result in erratic performance.

To cure this, just lay out an RF counterpoise wire on the ground (or around the room) about 1/4 wavelengths long (see below) and connect it to the radio chassis. The radio will be at a natural zero point for RF currents.

Of course proper station grounding is vital to good performance.  A 1/4 wave counterpoise, for the operating frequency, will substantially help with RF issues if you cannot ground your station.

 

 

 

Counterpoise length  236/Fq in mHz.

Band

mHz

1/4 wave length in feet

160

1.8

130'

80

3.5

66' 10"

60

5.331

43' 11"

40

7

33' 5 "

30

10.1

23' 2"

20

14

16' 9"

17

18.068

12' 11"

15

21

11' 2"

12

24.89

9' 5"

10

28

8' 4"

 

 

Paddle Sensitivity

Sensitivity adjustment is about 5% using the trim pots. Since each individual has a different capacitance on their finger tips, the trim pots allow for this adjustment.  Too much resistance and the circuit will fail to trigger.  Too little and the paddles with act a proximity sensor. The proper adjustment is to just touch the paddle and have it trigger.

 

 

Reverse Paddle

In models that are paddles only (no electronic Keyer), the paddles are reversed by rewiring the output cable.  Models with an electronic keyer are reversed by software programming.

 

 

 

Speaker

On models with a built-in electronic keyer there is a small Piezo speaker. This speaker is not very loud. The Piezo is for field programming.  Most rigs have a built in side tone. The speaker can be turned down by the internal volume control.

An external 8 Ohm speaker will easily be heard.

 

 

Tune Mode

Models with a built-in electronic keyer have a tune feature. In Iambic A or B mode, touch both paddles for a least 5 dot/dash repetitions. Release. Now your output, from the electronic keyer output jack, is a steady state for your to tune up your rig. Touch either paddle and it returns to the normal operating mode.