[CQ-Contest] MFJ-434 Voice Keyer

[Alexis Deniz]

Ken,try with the n1mm,in the help of the software you have the chart of how 
do the conections.......73 Alex

www.yv5ssb.org.ve www.4m5dx.org www.yw5cq.org
----- Original Message ----- 
From: "Kenneth E. Harker" <kenharker at kenharker.com>
To: "K0HB" <k-zero-hb at earthlink.net>
Cc: "CQ-Contest" <CQ-Contest at contesting.com>
Sent: Monday, December 26, 2005 12:14 PM
Subject: Re: [CQ-Contest] MFJ-434 Voice Keyer


> On Sun, Dec 25, 2005 at 04:54:13PM +0000, K0HB  wrote:
>> Santa left me a new MFJ-434 voice keyer to help with contesting vocals.
>>
>> Has anyone here used that with CT or other software, and built the 
>> interface shown in the MFJ literature?
>
> Here's one idea:
> http://www.qsl.net/ae0q/contest/dvk_trlog.htm
>
>> MFJ shows two resistors on each 'input' wire --- a 470-ohm at the 
>> computer end of the wire and a 1K in series with that on the circuit 
>> board at the gate of the switch transistor.  What's the point of 
>> separating these series transistors?  It requires hiding a glob of 
>> 470-ohm resistors inside the Dsub at the computer end of the cable.  Why 
>> not just put single 1.5K resistor on the circuit board?
>>
>> 73, de Hans, K0HB
>> --
>> ><{{{{*> http://www.home.earthlink.net/~k0hb
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> -- 
> Kenneth E. Harker WM5R
> kenharker at kenharker.com
> http://www.kenharker.com/
>
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