[QuadList] Recortec timer issue

[Guy Spiller]

I was definitely going to check the supply before really digging into 
it.  Don scanned the whole manual for me, so I just finished the "clean 
the surface area beneath the rotor with alchohol" procedure that it said 
to do before anything else, since apparently that often fixes whatever 
problems these things have.  It's working now, and maybe if get lucky, 
it will stay working after it gets hot.
Guy


On 9/23/2011 10:19 AM, LARRY wrote:
> Guy,
> One other odd thing I just remembered:
> The power supply for the recortec needs to be between 4.7, 4.8 vdc.
> The book makes mention of this.
> It seemed a little on the low side for TTL, but may be something else for you to check out.
> I guess if the DC supply voltage varies too much from the book spec, the clock pulses' one shots timing will also vary.
>
> That sorta reminds me of something like III would do. They built a whole PDP-10 DEC clone page CPU and ajusted all the one shots without bothering to first check the +5v supply.It wasn't: was 4.81 volts, and all the ones out on sites had to be run at 4.81 vdc.
> I know its not a big detail, but it's sometimes little stupid nit picky things like this that might keep stuff from working.
> larry
>
>
> Guy Spiller
> email: quadruplex at verizon.net
> phone: (804) 379-2050
> website: www.GuySpiller.com
> Midlothian, VA