flying high ...

[Magnus Danielson]

>>>>> "j" == jhaible  <jhaible at metronet.de> writes:

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

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

The thing is... the only trigger point I had was the 240 diodes...
I didn't even bother to read the hint on the subject line!

I was figuring that you thought that "oh, all this diodes lying here
waiting to be used, why not try that 240 diode phaser-core they cooked
up in the Hi-Fly... ".

Question is, will you use the same diode-driver cursuitry or would you
do a remake of that?
For those not aquanted with the schematics... the driving cursuits for
the diode modulation voltages draws quite some current and care must
be used to handle the current/power well.

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

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

Ah. In any way, I think that taking insipiration of the modulation
curcuitry could be good for many other cases.

 >> 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!

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

Well, I *suspect* that the HiFly might do this, but it is generally
possible since you do have two independent AP-filterbanks (6-poles each).
The documents is indeed very hard to read, just figure... people like
Juergen and me are not quite sure on how to interprent it! ;-D

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

See! I missed that one!

Eventually we will understand it... I think ;)

 j> The modulation generator is very interesting, too.

Certainly.

Cheers,
Magnus