flying high ...

[jhaible]

> EMS Hi-Fly's phaser!
> So, you are using up that life-time supply of 1N4148's? ;-D

Yes, Magnus hit the point ! (Both, with the HiFli, and using up
litterally all the diodes I found in the basement)

> Are you doing the full works with the mode-switch stuff and the
> modulator?

I really don't know. For the moment, I'm just curious how well the
diode stuff works. Graham Hinton once said better don't do it,
use OTAs and just borrow the overall concept, but I really
want to try it. If I am satisfied, I will probably go on with the
control stuff, or maybe I'll put it aside for a while. Who knows.

No intention to do anything about the sequencer in the next weeks
(sorry). But I have finally resurrected the JH-4, and I have just ordered
a front panel from Schaeffer Apparatebau. I'll put the artwork to
the web pages soon. When the panel arrives, there is a lot to do, either
creating a different PCB to hold the potentiometers, or wiring it all by
hand.

Meanwhile, until the panel arrives, I'll try to build the all pass shifter
core 
of the HiFli.

> For those not knowing this, the Hi-Fly phase-core and modulation
> cursuitry is something very interesting and fairly extravagant.
> The 240 diodes are used in stacks of 20 for each of the 6 AP filters
> in the two phaserbanks. You can have them run 180 degrees to each
> other and thus perform through-zero phasing!

The last one I didn't know - is this implemented in the HiFli, or are you
just speaking of a general possibility ? (The documents I have are so hard
to read; it took me quite some time just to realize that each "diode
pair" in the schemos is actually 20 diodes, for example.)

There are some other interesting configurations, too, like feeding part
of the audio onput signal to the control voltage of the all pass filters.

The modulation generator is very interesting, too.

> Good luck Juergen!

Thanks,

JH.