Search found 194 matches

by terkio
Sun Jun 28, 2020 2:57 am
Forum: The Peabody Lounge
Topic: "I Am A Google Deplorable" 855-290-0342
Replies: 57
Views: 13106

Re: "I Am A Google Deplorable" 855-290-0342

Are you aware of China a country ruled by a Communist Party ?
by terkio
Mon Jun 22, 2020 5:21 pm
Forum: Pro Audio Design
Topic: Method for testing thermal coupling
Replies: 9
Views: 202

Re: Method for testing thermal coupling

Can you tell more about what you want to thermal couple and why ?
by terkio
Sun Jun 21, 2020 3:12 am
Forum: Pro Audio Design
Topic: Method for testing thermal coupling
Replies: 9
Views: 202

Re: Method for testing thermal coupling

A google search on
"Measure thermal resistance"
might give you some results.
by terkio
Sat Jun 20, 2020 7:45 am
Forum: The Peabody Lounge
Topic: home improvement turns into science fair projects?
Replies: 202
Views: 13190

Re: home improvement turns into science fair projects?

The reactance of a 22uF at 60 Hz is 120 Ohm. So when plugged on 120V mains the current through the cap is 1A. I would not dare to do that without protection heavy goggles and gloves despite it should not blow up. Theory tells, it undergoes a 1A rms current, charges and discharges 60 times per second...
by terkio
Fri Jun 19, 2020 5:56 pm
Forum: The Peabody Lounge
Topic: home improvement turns into science fair projects?
Replies: 202
Views: 13190

Re: home improvement turns into science fair projects?

It takes little fan speed to get good heat exchange. I had a very noisy PC box. So I invested in a larger CPU fan with a big heat sink and speed controlled by cpu temperature. Then I found out that most of the noise was from two case fans that were large but running fast blowing a hurricane through ...
by terkio
Fri Jun 19, 2020 2:54 pm
Forum: The Peabody Lounge
Topic: home improvement turns into science fair projects?
Replies: 202
Views: 13190

Re: home improvement turns into science fair projects?

Excellent.

I presume this speed control has perfect efficiency, no heat from the caps.

3 caps, 2 switches.
I guess you obtain the 3 cap values by shorting some cap(s). Is that ok for a swich when shorting a charged cap ?
by terkio
Wed Jun 17, 2020 9:25 am
Forum: The Peabody Lounge
Topic: home improvement turns into science fair projects?
Replies: 202
Views: 13190

Re: home improvement turns into science fair projects?

I presume the noise, using a cheap dimmer is because of power is far from sine, made with a triac with delayed conduction. A PWM technique is prone to make such trouble, too. I have seen a two speed ceiling fan where a capacitor is inserted to give the slow speed. This is not continuous as you wish ...
by terkio
Sun May 31, 2020 7:59 am
Forum: Test, Measurement and Repair
Topic: Classic Bead Tantalum Capacitor Failure
Replies: 17
Views: 3950

Re: Classic Bead Tantalum Capacitor Failure

These days a low impedance aluminum (developed for switching PS apps) would be a sensible replacement. I like to hear this. Tantalum was said to be unique with some best unbeatable characteristics. A bad point since Ta ore is mostly under control of African maffias and chinese grab on such high tec...
by terkio
Mon May 25, 2020 12:47 pm
Forum: The Peabody Lounge
Topic: I love modern technology
Replies: 23
Views: 826

Re: I love modern technology

Another option is snare wires.
Set four small loops a foot apart on a twig.
Set the twig at a place they will like to use as a bridge. Bait with jelly.
by terkio
Mon May 25, 2020 1:30 am
Forum: The Peabody Lounge
Topic: I love modern technology
Replies: 23
Views: 826

Re: I love modern technology

Tree rats are pretty smart.
https://youtu.be/hFZFjoX2cGg