Pertec Interface Cable Length

Douglas Taylor dj.taylor4 at
Sun Aug 11 22:51:55 CDT 2019

On 8/11/2019 10:44 PM, Chuck Guzis via cctech wrote:
> On 8/11/19 6:00 PM, Douglas Taylor via cctech wrote:
>> I just looked at the TC02 and the Qualstar, there are termination
>> resistor packs on each.  The Qualstar has a bunch of 74LS240 IC's near
>> the J1 and J2 pertec interface cables.  The TC02 has a bunch of 74LS374
>> chips near the J1 and J2 connectors.
>> This is where the electrical engineer could help.  How do you determine
>> how long a cable the 74LS240 can drive?
> TC02?  The DECtape controller?
> Sorry, I must be dense; I'm not following.
> --Chuck

The TC02 is an Emulex TS11 emulation for pertec interface tape drives.  
The J1 and J2 are sort of standard terminology, don't know why.

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