Search found 3561 matches

by JR.
Sun Jan 31, 2021 2:56 pm
Forum: The Peabody Lounge
Topic: beverly hillbilly storm windows and cybernetic heat control
Replies: 37
Views: 41174

Re: beverly hillbilly storm windows and cybernetic heat control

So far the minimum (250W) baseboard with blower assist can maintain the thermostat setting down to low 30s outside. So for now the extra baseboard watts are cut off. === For decades I slept with an electric blanket. Why heat the air in the room when you are spending several hours under the blankets?...
by JR.
Sat Jan 30, 2021 1:51 pm
Forum: The Peabody Lounge
Topic: digital thermometers.... arghhh
Replies: 21
Views: 7732

Re: digital thermometers.... arghhh

About a day ago the barometer shifted from rising to falling, so "always wrong" may have over-reacted. It's the "Dr. Fauci" barometer. Neal Ferguson wrote the barometer code with Fortran and with identical inputs returns random results. :lol: I remember coding with Fortran back in the 60s to do my ...
by JR.
Sat Jan 30, 2021 9:54 am
Forum: The Peabody Lounge
Topic: digital thermometers.... arghhh
Replies: 21
Views: 7732

Re: digital thermometers.... arghhh

Since yesterday my "always wrong" old forecasting thermometer has called for rain, while my new improved forecast has been predicting partly cloudy. So far partly cloudy is more accurate... About a day ago the barometer shifted from rising to falling, so "always wrong" may have over-reacted.

JR
by JR.
Fri Jan 29, 2021 2:57 pm
Forum: The Peabody Lounge
Topic: Entropy
Replies: 1198
Views: 507150

Re: Entropy

china-man.jpg While not strictly normal wear and tear, this old ceramic statue that I carried around the country for years (after my mother died) got trashed either by wind gusts, or one of my neighbor's cats, knocking it over. This statue was a fixture in our house when we were kids growing up. Yo...
by JR.
Fri Jan 29, 2021 2:43 pm
Forum: Document
Topic: Phono Preamps
Replies: 49
Views: 107655

Re: Phono Preamps

In response to a telephone request from an interested DIY'er I scanned in the scheamtic for the power supply I designed for my old P100. http://www.johnhroberts.com/P100_PS.jpg I doesn't have resistor values but it's pretty straightforward, Heravily filtered Zener reference times a gain of 15/zener...
by JR.
Thu Jan 28, 2021 11:42 pm
Forum: The Peabody Lounge
Topic: digital thermometers.... arghhh
Replies: 21
Views: 7732

Re: digital thermometers.... arghhh

The barometric pressure just shifted from rising to falling so it looks like less good weather is coming...

I really like the improved technology... and this is a good use of simple digital number crunching.

JR
by JR.
Thu Jan 28, 2021 9:35 am
Forum: The Peabody Lounge
Topic: digital thermometers.... arghhh
Replies: 21
Views: 7732

Re: digital thermometers.... arghhh

You need a wireless rain gauge now. I use old school plastic rain gauge with the slick magnifying curved face to make it easier to read. https://static.grainger.com/rp/s/is/image/Grainger/3KLT2_AS01?hei=1072&wid=1072 In this weather I need to be careful to empty the rain gauge out so it doesn't fre...
by JR.
Wed Jan 27, 2021 7:05 pm
Forum: The Peabody Lounge
Topic: crystal ball
Replies: 32
Views: 24455

Re: crystal ball

#19

I predict Kamala will be our first black, female, president (sooner rather than later). Is it still OK to note that she is female?

[update- that will check off multiple diversity boxes with a single stroke... :lol: /update]

JR
by JR.
Wed Jan 27, 2021 3:50 pm
Forum: The Peabody Lounge
Topic: digital thermometers.... arghhh
Replies: 21
Views: 7732

Re: digital thermometers.... arghhh

https://ambientweather.com/media/catalog/product/cache/72ee54ef9854ec330a16fa8b43d7d3fe/w/s/ws-2801a-1.jpg My new improved themometer/barometer arrived and I likey..... and only $44 (ws2801A) The barometer not only has a full numerical reading, but a direction of change arrow, and a rate of change ...
by JR.
Tue Jan 26, 2021 4:28 pm
Forum: Test, Measurement and Repair
Topic: how to test relays for phono signals
Replies: 15
Views: 7551

Re: how to test relays for phono signals

Not that I expect there to be much there there, the phono preamp input termination is typically 47k (and 100pF), and at mV level signals any rectification from oxides or dirt may be more like on/off. Good luck JR As someone who has replaced thousands of ITT Schadow switches in MCI consoles I know t...