[RTTY] Icom CI-V with Transistors

[Jim Hargrave]

I am using a 3 transistor version. It has worked well on my IC-735 since 
1987.
It's housed in a "Sucrets" can along with the audio isolation transformers.

The In914 and 10 MFD capacitor from the Tx line to Ground provides the 
negative bias for the Rx line.

Jim w5ifp at gvtc.com


On 1/16/2014 9:19 AM, Dave AA6YQ wrote:
> I have used and recommended this circuit for many years; it works well:
>
> <http://www.dxlabsuite.com/commander/interface.jpg>
>
>         73,
>
>              Dave, AA6YQ
>
>
> -----Original Message-----
> From: RTTY [mailto:rtty-bounces at contesting.com] On Behalf Of Jim W7RY
> Sent: Thursday, January 16, 2014 12:39 AM
> To: rtty at contesting.com
> Subject: [RTTY] Icom CI-V with Transistors
>
> Has anyone used the "transistor type" of serial to TTL (CI-V) converter?  Had any issues?  I've built one with the MAX232 chip and
> it works fine.
>
> If anyone has had issues with a transistor type, please let me know.
> 73
> Jim W7RY
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