[TenTec] AUX Keying OminiVI Plus

[John Huffman]

I have had success with the Keyall from Jackson Harbor Press.

http://home.att.net/~jacksonharbor/keyall.htm

Hard to beat $11.  I use a "Y" cable between the TX IN and TX OUT and 
the Keyall.  I turn off the AUX Key circuit  through the menu.
The Keyall is silent, unlike the AUX relay, and is rated at 500 V and 
2.5 A.

73 de K1ESE
John


Dr. Gerald N. Johnson wrote:
> On Sat, 2007-05-26 at 07:13 -0700, Jim WA9YSD wrote:
>   
>> This will be the third time I have to send in my OMNI VI Plus to get the AUX Key circuit repaired.  Could RFI be blowing this for me?  How do I prevent this from going out?  Is there a better fixe out there?
>>    
>>   K9TF/WA9YSD
>>     
> What is that circuit keying? Lots of amplifiers key significant voltage
> and current which can fry the internal keying transistor and if the
> keyed circuit is a relay coil, inductive kick from the coil adds insult
> to the driver transistor.
>
> It is quite practical to create a circuit using a small protected reed
> relay or a couple MOSFET transistors that will key a few hundred volts
> at 20 amps though a couple hundred volts at a quarter amp is usually
> enough.
>