On Sun, Aug 11, 2019, 11:29 AM Alan Perry via cctech
wrote:
>
>
> On 8/11/19 6:58 AM, Charles via cctech wrote:
> > Anyway. I did a bit more Googling and discovered that plain water
> > dissolves the PVA goop just fine. No need to use a lot of expensive
> > alcohol which seems to be a less effect
On Sun, Aug 11, 2019 at 7:44 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 interfa
On 8/12/2019 1:25 AM, Chuck Guzis via cctech wrote:
On 8/11/19 8:51 PM, Douglas Taylor via cctech wrote:
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.
Ah, the *Emulex* TC02. You had me going there--DEC al
On 08/11/2019 08:00 PM, Douglas Taylor via cctech wrote:
This is where the electrical engineer could help. How do
you determine how long a cable the 74LS240 can drive?
Well, there are several considerations. First, it takes
some current to charge up the cable capacitance. More
current c
On 8/12/19 8:11 AM, Douglas Taylor via cctech wrote:
> The bad news is that the cable lengths must be short to use the Qualstar
> 1260 with a PDP11, the good news is that I can lift and carry the tape
> drive! For many of us in this hobby that it is extremely important.
>
> After looking at pict
Another consideration with the TC02 is the small buffer. I don't know
what tape speed your drive runs at, but we lost a lot of sales to Dilog
because of buffer overflow on some of the faster CDC dirves. When we
came out with the TC03, it had a larger buffer to handle this.
cheers,
Nigel John
