[GreenKeys] Speed Converters

[Andreas Müller]

Hi,
I noticed that some of the list are/have been working with speed converters. 
Does anybody have schematics for a simple (duplex) speed converter from 75 bd 
down to 45,45 and/or 50 bd. I have the following problem: due to the fact 
that the most laptop computers now available have no serial port I was 
thinking about using a port server which would provide 8 serial ports via the 
network connection (another advantage would be that I could use several tty 
channels form different computers). I got a "Port Sever 8" from DIGI 
(www.digi.com), but the slowest speed it knows is 75 bd, so I need to convert 
the speed seperately.
Does anybody have experience with such a setup and knows tty-software which 
can be rerouted instead of using the hardware addresses of the serial ports. 
How about HeavyMetal?
Thank you
Andreas, DD1LM 

Am Donnerstag, 15. Juni 2006 05:13 schrieb Ron Kolarik:
> Mainline UT-4, and I have the circuit board in the last rescue pile.
> No docs but all the chips are there and it's built into a chassis with
> some other logic......yours for shipping if you want it.  You'll need
> to replace the PROMs with either other PROMs or maybe an
> EPROM to make it easier to change.....no docs, not sure what will
> work.
>
> Ron  K0IDT
>
>
> ----- Original Message -----
> From: "Keith Densmore" <densmore at idirect.com>
> To: "GreenKeys List" <greenkeys at mailman.qth.net>
> Sent: Wednesday, June 14, 2006 10:31 AM
> Subject: [GreenKeys] Speed Converters
>
>
> Hi Y'all
> Back around 1980 ASCII  to baudot (and vica versa) speed converters were
> common. Some were built into the FSK converter and some were seperate. Does
> anyone have one of the  seperate units either homebrew or commercial or a
> construction article about the same.
>
> Thanks,
> Keith, VE3TS
>
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