[ARC5] Smart People: Multi-Set Current Corn-fusion

[John Franke]

Is the 100V holding steady as the number of loads is increased?

John WA4WDL

> On December 3, 2017 at 9:09 AM David Stinson <arc5 at ix.netcom.com> wrote:
> 
> 
> Dear People Smarter Than Me:
> 
> I'm confused.  Bumped-up the RAX "burn-in" to 100V
> B+, which is provided to all three receivers from
> the same buss, using a current-limited supply so
> if any of the old parts decides to "shuffle off
> this mortal coil," the supply will shut that down.
> Did some current measurements with all sets in the
> same operating mode:
> 
> All sets connected and off:  13 mA, within 1 mA of
> expected.
> LF set playing alone: 30 mA (has fewer stages than
> the others).
> LoHF set playing alone: 41 mA.
> HiHF set playing alone: 46 mA (about 10% "hot,"
> will check).
> but:
> All three playing normally at once: 83 mA.
> 
> Ummm... shouldn't that be like 117 mA?
> 
> Anybody got an idea?
> 
> 73 OM DE Dave AB5S
> 
> 
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