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Author Topic: Where to attach a COS Line on HTX-242?  (Read 325 times)
KK2QQ
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Posts: 40


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« on: August 27, 2003, 04:04:46 AM »

Hello:

I'm looking to modify the HTX-242 for IRLP operation.  I need to tap into the radio to add a COS Signal Line to hook to the IRLP Interface Board.

Does anyone have any idea where I might be able to get a good COS Signal from within the HTX-242 Circuitry?

Thanks.

*Bradley
KK7QI
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WB2WIK
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Posts: 20543




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« Reply #1 on: August 27, 2003, 12:11:59 PM »

I'm not familiar with the HTX-242 at all, however if the rig has a "BUSY" (incoming signal, or squelch broken) indicator of any sort -- usually a green LED that illuminates to indicate the RX frequency is busy -- then the signal that drives that LED indicator can be used to drive an external COS function.

The LED will have a voltage drop across it when it's illuminated, and won't when it's not.  You can use that signal to directly drive other circuitry, or buffer it and drive a relay.

WB2WIK/6
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KA0MR
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Posts: 221




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« Reply #2 on: September 01, 2003, 10:00:24 AM »

Configuring this radio for this purpose of ILRP most like it will become an "auxillary" station. Be sure you read Part 97 in regards to "auxillary station" rules and any radio below 221 MHz may not be used.
 Bob KAØMR
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