Search found 120 matches

by terkio
Mon Sep 09, 2019 11:45 am
Forum: The Peabody Lounge
Topic: "Deboosting" Google or Are We Banned? I'll Call Either A Win.
Replies: 26
Views: 3399

Re: "Deboosting" Google or Are We Banned? I'll Call Either A Win.

It is clear politicians and advertisers have used internet right away to influence people.
That has reached a stratospheric level, with bots fighing against bots to bias search engines.
Now days, you rarely get the information you are looking for, to specific requests.
by terkio
Wed Sep 04, 2019 6:31 pm
Forum: Pro Audio Design
Topic: Dielectric Absorption
Replies: 60
Views: 31228

Re: Dielectric Absorption

A lumped model.
Does this model explain the clicking issue about microphone preamps phantom power isolation capacitors ?
Can on measure the characteristics of this capacitor and resistor array ?
by terkio
Wed Sep 04, 2019 4:41 pm
Forum: Pro Audio Design
Topic: Dielectric Absorption
Replies: 60
Views: 31228

Re: Dielectric Absorption

Can we model DA as a voltage source of a high impedance parallel to a perfect capacitor ? For instance 1 volt througt 1 MegOhm. This would be consistent with the voltage that keeps coming back after shorts. With this model, could that explain the clicking issue about microphone preamps phantom power...
by terkio
Mon Sep 02, 2019 4:45 am
Forum: Pro Audio Design
Topic: Dielectric Absorption
Replies: 60
Views: 31228

Re: Dielectric Absorption

Most amazing about DA is the voltage coming back after the cap was shorted.
Coming back after shorts, again and again.
There must be some battery that has built inside, recharging the cap.
Who knows the physics and chemistry that is going on ?
by terkio
Fri Aug 23, 2019 6:05 am
Forum: The Peabody Lounge
Topic: how green is my shack?
Replies: 2
Views: 417

Re: how green is my shack?

Interesting for a hot place I know in Australia.
What is the heat sink of the heat pump ?
An outside air exchanger I presume.
Can a heat pump give an efficient air conditioning using water from a nearby creek ? At the cost of pumping water, though.
by terkio
Thu Aug 08, 2019 1:13 pm
Forum: Pro Audio Design
Topic: A Differential Deboo Integrator to Servo Mic and Low-Level Preamps
Replies: 9
Views: 14436

Re: A Differential Deboo Integrator to Servo Mic and Low-Level Preamps

I compared using a differential Deboo integrator, and a non inverting two caps integrator. Integrating capacitor(s) insulation resistor does result in DC offset error in both cases. With the Deboo the resistor mismatch brings a similar effect. With the non inverting two caps, there is no such resist...
by terkio
Thu Aug 08, 2019 9:21 am
Forum: Pro Audio Design
Topic: A Differential Deboo Integrator to Servo Mic and Low-Level Preamps
Replies: 9
Views: 14436

Re: A Differential Deboo Integrator to Servo Mic and Low-Level Preamps

There is a catch in the Deboo integrator, differential or single. It is sensitive to resistor mismatch. This can be important or not, depending of the application. When in need for near perfect integrators, one needs capacitors with very high insulation resistors. Using a Deboo configuration, the un...