I need a little help!
I just bought this new Etherwave Theremin with Plus Kit.
I started to install the 5 wire harness to the 11-211 PCB. I noticed that there was a resistor that goes from the +12v to the GRD, do I remove this resistor?
Thank you Ben
benroy@gosciencezone.com
cell 423-596-0730
From: Eastleigh, Hampshire, U.K. ................................... Fred Mundell. ................................... Electronics Engineer. (Primarily Analogue) .. CV Synths 1974-1980 .. Theremin developer 2007 to present .. soon to be Developing / Trading as WaveCrafter.com . ...................................
Joined: 12/7/2007
"That's not a resistor, it's a diode! And yes, it has to be removed." - Thierry
That diode kind of puzzles me - the only function I can see it serving is to prevent the +12V rail from ever going -Ve (its strapped between +12V and 0V, anode to 0V), so its presumably fitted to protect against this event.. Moog are not known for "wasting" components for "needless" protection.
So I would remove this diode to enable connection of the kit, but fit it back on the underside.
Fred.
Fred wrote: "So I would remove this diode to enable connection of the kit, but fit it back on the underside."
That's what you would do. What Moog does on new instruments with the current 11-211J board release is either installing the diode for the Standard version or not installing it in the Plus version.
From: Eastleigh, Hampshire, U.K. ................................... Fred Mundell. ................................... Electronics Engineer. (Primarily Analogue) .. CV Synths 1974-1980 .. Theremin developer 2007 to present .. soon to be Developing / Trading as WaveCrafter.com . ...................................
Joined: 12/7/2007
Thanks for the information Thierry,
Is this diode fitted on the add-on board, or is it simply not deemed needed? ... Its all entirely academic, I cannot see the fitting / not fitting the diode can make any difference unless the supply was reversed or there were -ve spikes on the supply, neither of which seems likely. I have not observed any situation where this diode could go into conduction.
Fred.
There is no diode on the add-on board. I for myself didn't yet find a situation where this diode was needed, too. I guess that's a transient thing to prevent short reverse situations in the switch-on or switch-off moment, when there is not the additional load from the Plus add on. But it's a guess.
Thanks for the information Thierry,
Is this diode fitted on the add-on board, or is it simply not deemed needed? ... Its all entirely academic, I cannot see the fitting / not fitting the diode can make any difference unless the supply was reversed or there were -ve spikes on the supply, neither of which seems likely. I have not observed any situation where this diode could go into conduction.
Fred.
Thank you
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