Hello again.
I checked the board, resistance values and it follows the schematic. I went ahead and breadboarded the same circuit and get the same result. The 3 240R resistors and the paired transistors get hot. Circuit still draws 33ma. Head Scratcher...
Thank You
-Hans Buscher310-776-0143 text
On Apr 10, 2018, at 6:09 PM, Ken Stone otherunicorn@... [cgs_synth] <cgs_synth@yahoogroups.com> wrote:
Check the values of the other resistors, and look for shorts etc. Something is turning on the transistors way harder than they should be.On Wed, Apr 11, 2018 at 5:29 AM, andrew buscher hansbuscher@... [cgs_synth] <cgs_synth@yahoogroups.com> wrote:Hello. Recently built this phaser. It works but the 3046 and 220Rs get quite hot. I swapped the 3046 with BC550s in 4 positions and the 123 transistor is boiling.
When manipulating the Phase control I get a +2.2v to +4v swing at pin 8. With only the 3046 and vtl5c3/2s in, the circuit draws 33ma on the +15vdc side. I'd like to know more about this part of the Phaser. I looked around for other "vactrol driver" schemes and found nothing that looks like this one. Very interesting.
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Thanks Ken!
-Hans Buscher
310-776-0143 text
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