Search found 292 matches

by terkio
Tue Jan 05, 2021 4:34 pm
Forum: The Peabody Lounge
Topic: Entropy
Replies: 1299
Views: 613719

Re: Entropy

With these cheap valves I often I see leaking from around valve handle/stem, my suspicion is that these valves are not engineered for many lifetime operations. Sometimes the leaking stops when turned hard open or hard closed, so I stopped trying after neither position stopped the drip. Some designs...
by terkio
Tue Jan 05, 2021 8:30 am
Forum: The Peabody Lounge
Topic: Entropy
Replies: 1299
Views: 613719

Re: Entropy

I really hate it when physical things do not behave as expected (its the laws of physics). I previously mentioned it was an odd "coincidence" that the sink cut off valve started dripping after I shut off the hot water heater... Now after repairing the heater and bringing it back online, the drip ha...
by terkio
Sun Jan 03, 2021 2:16 pm
Forum: The Peabody Lounge
Topic: Entropy
Replies: 1299
Views: 613719

Re: Entropy

Replacing faucets and stop valves is not rocket science. I do it myself, I cannot afford a plumber for this 😱. That is just a matter of using the right gasket and perfectly clean mating surfaces. Gentle torque is all that is needed when things are done right. Cleaning and letting soak in vinaiger wo...
by terkio
Tue Dec 22, 2020 6:46 am
Forum: The Peabody Lounge
Topic: Entropy
Replies: 1299
Views: 613719

Re: Entropy

Isn't it simply operating the valve ( open then close ) without removal. I don't feel lucky... what if I test it and it doesn't stop leaking? So do I. Despite of service manuals and internet advices, I rather not touch it, in case it is so badly stuck from scale, it won't go back closed. At my plac...
by terkio
Mon Dec 21, 2020 8:10 pm
Forum: The Peabody Lounge
Topic: Entropy
Replies: 1299
Views: 613719

Re: Entropy

The hang tag on the relief valve says to check them every two to four years. It sounds like they expect you to remove it to inspect for evidence of overheating. Isn't it simply operating the valve ( open then close ) without removal. This to make sure it is not stuck. Acid waters make corrosion. Al...
by terkio
Thu Dec 03, 2020 2:48 pm
Forum: Pro Audio Design
Topic: Super Low Distortion Ultra Pure Audio Oscillators Revisited
Replies: 156
Views: 180121

Re: Super Low Distortion Ultra Pure Audio Oscillators Revisited

Insertion loss. Theoretical values calculated with Spice. 10nF and 16K as " Nacho 1KHz notch filter". Notch 994.7 Hz 100 Hz -0.66 dB 200 Hz -2.31 dB 500 Hz -9.16 dB 2KHz -9.03 dB 3KHz -5.08 dB 4KHz -3.27 dB 5KHz -2.27 dB 6KHz -1.66 dB 7KHz -1.26 dB 8KHz -0.99 dB 9KHz -0.79 dB 10KHz -0.65 dB 20KHz -0...
by terkio
Thu Nov 26, 2020 9:51 am
Forum: Pro Audio Design
Topic: Super Low Distortion Ultra Pure Audio Oscillators Revisited
Replies: 156
Views: 180121

Re: Super Low Distortion Ultra Pure Audio Oscillators Revisited

About digital synthesis, I found this: https://www.analog.com/en/technical-art ... rator.html
Jumping at the conclusion.
They claim: The –120 dBc harmonic distortion figure could be met with a careful design....
by terkio
Thu Nov 26, 2020 8:49 am
Forum: Pro Audio Design
Topic: Super Low Distortion Ultra Pure Audio Oscillators Revisited
Replies: 156
Views: 180121

Re: Super Low Distortion Ultra Pure Audio Oscillators Revisited

I understand the objective is ultra low THD+N. How does this analog solution compares with digital synthesis. _Synthesis using a high performance sound card, focusrite, evaluation boards. _Synthesis re inventing all from scratch: High speed clock, Ram holding Sinus data, high resolution DAC, appropr...
by terkio
Sun Nov 22, 2020 7:09 pm
Forum: The Peabody Lounge
Topic: The Corona Virus Hoax of 2020
Replies: 421
Views: 170710

Re: The Corona Virus Hoax of 2020

Where have I seen the story of one who had a positive test in a nostril and a negative in the other one ? :D
by terkio
Sat Nov 21, 2020 8:49 am
Forum: Pro Audio Design
Topic: Super Low Distortion Ultra Pure Audio Oscillators Revisited
Replies: 156
Views: 180121

Re: Super Low Distortion Ultra Pure Audio Oscillators Revisited

I've been able to lower second harmonic distortion by identifying three sources. 1) The VCA. I lowered the input current by 14 dB. It no longer contributes. Is this the VCA from THAT Corp ? Have you figures about the VCA distortions at these low levels. And comments about noise when going to low le...