[QuadList] First Tech Publication posted to website: Ampex 1021Intersync...

[WVGO]

Interesting question, Don.
It always seemed to me back then that the Intersync drift was more a 
function of ambient temperature than the power supply voltage changing.
I worked at a PBS station way back then that had 3 1200s and a 2000, 
which, probably unlike most commercial operations, were not powered up 
24/7.  You could forget doing anything with the machine for at least an 
hour after powerup....otherwise, you'd be tweaking discriminators almost 
continuously instead of just a couple of times  per shift.
Guy


Don Norwood wrote:
> Here's a question and a "special offer"..........
>  
> David mentions Merlin.  They offered as one of their upgrades, a 
> separate power supply for the Intersync.  The mod consists of an OEM 
> +/-12 volt supply from HP which is mounted in the rear of the machine 
> and removes the servo system from the machine's power supply.  I have 
> a 1200 with this mod, and it certainly works OK, but I can't tell that 
> there's really any difference in stability of the Intersync.  Does 
> anyone know what specific problem this upgrade was supposed to address?
>