Pro Audio Design Forum

crin wrote: ↑ is there a particular reason why you suggest the 1510 instead of the 1512?

The datasheet is clear.
Here high gain is needed.

JR. wrote: ↑Sat Jan 23, 2021 1:21 pm I notice that some new weather remotes track barometric pressure too (mine doesn't)... it seems temp, humidity, and barometric pressure should be enough information to predict weather.

JR

Barometric pressure is the most important.

For the balanced only version, I would manage going from 4 caps to only one, by means of footprints to allow the cap to jump over the J1 node.

I do not understand about J1 J2.
I see a balanced-only configuration as a underpopulated board, no J1 no J2 no VR2 but a strap, four caps become one.

Yes. A link given by mediatechnology in a previous post. http://www.janascard.cz/PDF/An%20ultra%20low%20distortion%20oscillator%20with%20THD%20below%20-140%20dB.pdf Very informative, a key source. With: Resistors are preferably 0.1%, 15 ppm/K through-hole types, capacitors are preferably polystyrene...

I was amazed to see very good notch depth despite a +/- 10% capacitor. Thanks to the two trimmers adjusted in SE mode to accurately get Fc 1KHz, I get -96dB notch depth on the 6 cases I simulated. The trimmed 15.9k range is: 14.5k to 17.7k. The trimmed 15.9k/2 range is: 7.4k to 8.6k. So, I think you...

I have done more work about the two ways to build a balanced notch filter. This is about J1 and J2. What is best two jumpers or one jumper. I had thought a twin H was better rather than a double Twin T. It looks good and can be built with all equal capacitors. Then I realized that this was not a rat...

mediatechnology wrote: ↑Tue Jan 19, 2021 4:43 am You need a "cotton region" shelter for your outdoor instruments...

https://proaudiodesignforum.com/forum/p ... f=12&t=476

Definitely. This is the real thing and it would look great in JR backyard.

So far, with simulations I found no difference. Virtual grounds connected or not, no difference detected. The unbalances, I tried: inputs amplitudes 0.25 0.75 ( iso 0.5 0.5 ) input resistance 1K 2K ( iso 1K 1K ) With or without differential output load 100K. Interesting. I found the same thing on t...

I cannot resist to tell a most stupid mistake of my own. That was with a battery charger. A cheapo. I set the charger near the car battery, checked I had an ok voltage at the battery, so far so good. A couple of hours later, I came back to check. From a clumsy move, the charger tumbled down, while i...