Shack Accessories - G7SYW's amateur radio bits & bobs...
 
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Shack Accessories

| Posted in The Shacks

Morse code (CW) paddle

Within my station is an MFJ 564 paddle which is used for sending morse code, or CW as it’s also known.
Yes, even though morse code is one of the oldest methods of radio communication, it is still very widely used and popular with operators who prefer to use as little power as possible (QRP) to maintain a contact.

Some amateur operators prefer to use the original style of morse key (straight key) which is the type often portrayed on TV and film as used by telegraph operators in westerns etc. A lot of the old “keys” can be quite collectable which makes them valuable.

The paddle differs in that they are best described as two keys mounted back to back horizontally. The
major difference being that one (often the left) is used to produce the “dots” (dit) and the other to produce the “dashes” (dah).
MFJ-564 morse paddle

When both contacts are closed simultaneously by squeezing the paddles together, the ‘iambic’ function (alternating dits and dahs) are created with an electronic keyer. The keyers are now normally built into the transceiver but external keyers for radios without the built-in keyer are available.

The paddle type keys are often referred to as iambic paddles, however, they are more accurately described as dual lever paddles as it is the electronic keyer that produces the iambic keying.

Iambic keying or squeeze keying creates alternating dits and dahs. This makes sending some characters
easier, like the letter C, by merely squeezing the two paddles together.
In single-paddle/key, non-iambic keying, the hand motion would require alternating four times for C (dah-dit-dah-dit). Download a copy of the international morse code here

Kenwood SP23 Extension Speaker

To compliment the Kenwood range of transceivers, matching external loudspeakers are available as are power supply units to make a complete line-up.
Kenwood SP23 extension speaker

I use a Kenwood SP-23 external speaker, while not being perfectly matched (in size) to the TS-850, but instead to the slightly smaller TS-450 & TS-570 transceivers, it still gives clear audio due to the front facing speaker, unlike the radio which has the speaker on the top panel as do most other radios.

Some of the higher specification external speakers contain filters to allow the operator to tailor the sound to their liking and make weak signals easier to hear. Some contain circuits for noise reduction which can also help in picking out really weak signals from man made and atmospheric noise.