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Author Topic: Straight Key Basics  (Read 1496 times)
KG6YSF
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Posts: 91




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« on: October 07, 2012, 07:49:02 PM »

I have been a general for a little while now but am still very shakey electrical design and terminology. That stated I am wanting a understanding of a simple cw key. I have a Drake TR-7 that, to my understanding, has to be tuned to an antenna in cw mode. So I want to make sure that i understand the princible of a key so yhat I can make one without damaging my radio.
The way I understand a cw key is that it is a switch that creates a closed circuit. If that is corect a simple momentary switch that connects the two leads would sufice for a basic key. Note: I am not looking for something to work code with, I simply want something to tune my radio into a dummy load.
Any thoughts and imput would be appreciated.

73s 
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"Rangers Lead The Way!"  "Sua Sponte"   "Litalis Velox Silens"
When all else fails ham radio is there!
FT2900, FT8900, VX6, Ft60, TS940SAT, Drake TR7, MFJ 969
AC5UP
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« Reply #1 on: October 07, 2012, 08:55:44 PM »

A straight CW key like a J-38 is essentially a single pole, single throw, momentary switch.
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AA4N
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Posts: 111




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« Reply #2 on: October 07, 2012, 08:57:00 PM »

You've got it right.  A morse key is just a normally open momentary switch.  You could substitute any old toggle switch or push button switch if all you are going to use it for is tuning up.

Cheers

Mike AA4N
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KG6YSF
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Posts: 91




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« Reply #3 on: October 07, 2012, 10:17:10 PM »

Thanks "old man."  I needed to hear I was on the right thought process.  My head has been realy scattered lately.

73s
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"Rangers Lead The Way!"  "Sua Sponte"   "Litalis Velox Silens"
When all else fails ham radio is there!
FT2900, FT8900, VX6, Ft60, TS940SAT, Drake TR7, MFJ 969
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