开云体育

I went to AliExpress to see: there is a great many choice of capsules, unfortunately with about no information at all. Nosem and Takstar brands seem to be the most widespread. It's like shooting in

Hallo, sorry for my mistake. But, please let me say something to your comment. Just to clarify, you‘re saying that Most backplates are made out of solid brass. You are completly right and this was

Hi Ralf, It's not me that's building a capsule, it's michaeljtbrooks. However, I can make some comments: "2- /the backplate cannot be stiff enough. That is one reason for partial cancelation of

Hey, Jerry Lee, my namens Ralf and this is the first reply in this forum. I‘ m writing from Germany so please excuse my bad language. About 10 years ago I made a very similar experiment wich I

Whatever few ohms there don't matter compared to the Gigaohm input resistance of the Alice circuit. Look elsewhere. Surely 20 micron thickness does not help with sensitivity, but all the parasitic

It is more of a relative observation. A Chinese K87-style capsule with exactly the same circuit gives a hotter output, requiring 11 o-clock on the gain. Headphone amplifier: Behringer DX2000

Interesting project. I made a basic omni circular capsule many years ago (I had access to a friends lathe and pretty well equipped workshop at the time).? Diaphragm material was an issue (especially

What impedance converter (head amp) are you using? What polarization voltage (bias) are you using? What preamp?

Really amazing! Brilliant! All encouragement Best wishes David P

Awesome! And yes…. You are “supposed to do that” lol! Best Regards, Jules Ryckebusch

I've been doing the thing that you're not supposed to do: building my own condenser capsules. I thought I'd share my technique. I wanted to experiment with the shape of the capsule, membrane tension,

This is only a quick 'concept' schematic.... As we have discussed in this thread already, the decision to use a single sided audio output does not affect the option of creating a balanced output. The

But this is not balanced or am I missing something? Can we go further with this one?

I think you could try something like this..... You could use a dual OPA1642 and a single OPA1641. By not regulating the op-amp supply, - and carefully selecting the feed resistors for the regulated

How would it be with 3 opamps? regarding not concentrating on the existing PCB

Probably not. In fact it would probably be better to simply regulate the Voltage Multiplier? DC supply, and not the op-amp supply That might help minimise current drain -? which is going to be

Is C8 and C9 still necessary?? C13,C14?

*Here's a (very) rough schematic* ( http://www.jp137.com/lis/OPA.Alice.mod.ideas.jpg ) of what would be involved, using the existing dual PCB. Notice the output is now single single sided (but still

Quiescent current of each section is rated at 2.3mA maximum, for a total of 9.2mA, which is still within specs. Does not leave much for operating currents, but it shouldn't be an issue. Typically,

You might just keep it in spec (max 10mA) if you don't regulate the op-amp supply, and? just regulate the voltage mulitplier (VM) supply. I found that using 27k feed resistors to the VM circuitry