[OZAPRS] Back to Back TNC's

[Ray Wells]

Andrew,

I'd just use a DIN to DIN with the appropriate leads crossed over.

The source impedance of a typical TNC is reasonably low for tx audio 
and, rx impedance is typically >10k. Audio levels would be 'about' 
matched. Typical demodulators can handle a reasonably wide range of 
input levels starting at a couple of hundred mV

I've used that technique with 9k6 modems (YAM and Baycom USCC)

Ray vk2tv

On 11/12/10 12:09, Andrew Rich wrote:
> What is the best way to hook two TNCs together at audio level ?
> A little audio transformer ?
> - Andrew -
>
>
> _______________________________________________
> OZAPRS mailing list
> OZAPRS at aprs.net.au
> http://lists.aprs.net.au/mailman/listinfo/ozaprs

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.aprs.net.au/pipermail/ozaprs/attachments/20101211/a1697331/attachment.htm>