[GreenKeys] TD gears for the dual head 28 ASR

[Peter Gottlieb]

You wouldn't need a buffer (besides the on-chip ones) to receive 60 and send out 
at 100, but if you ran a tape at 100 you would need a buffer to send out at 60.  
A little micro with a few K of RAM could probably do nicely.



On 2/4/2013 10:43 PM, paul0926 at comcast.net wrote:
> Christian wrote: "wouldn't it be easier to just keep it running at 100 WPM,
> and just use a pair of UARTS and loop-TTL to TTL-loop converters to
> make it transmit/receive at whatever speed one pleases?"
>
> I favor this approach, but doesn't it need a buffer to compensate for the 
> speed difference? That aspect seems tricky to design.
>
> Paul
> KD0DFR
>
>
>
> ----- Original Message -----
> From: Christian Gauger-Cosgrove <captainkirk359 at gmail.com>
> To: gfmurphy at earthlink.net
> Cc: Greenkeys <greenkeys at mailman.qth.net>
> Sent: Mon, 04 Feb 2013 22:25:37 -0000 (UTC)
> Subject: Re: [GreenKeys] TD gears for the dual head 28 ASR
>
> Hellos:
>
> While I know why people what to run their TTYs at 60 WPM, but quite
> honestly, wouldn't it be easier to just keep it running at 100 WPM,
> and just use a pair of UARTS and loop-TTL to TTL-loop converters to
> make it transmit/receive at whatever speed one pleases?
>
> Now, in a perfect world, a better, and more fun solution would be to
> get two 28RT sets, one which has the punch geared for 100WPM, and the
> reader with a gear shifter; the other 28RT set put with the punch on a
> gear shifter and the (climbing head) reader geared to 100 WPM. Because
> that would just look cool.
>
>
> Cheers,
> Christian
>
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