Archive for the ‘Electronics’ Category

Electronic Tubes on Alibaba

Friday, August 11th, 2017

Research Links

Example Automation Companies

Monday, August 7th, 2017

This is my page for keeping notes about small automation companies for the purpose of emulating them.

Make Your Own PCBs on an Inexpensive Desktop CNC Mill

Sunday, July 30th, 2017

Research Links


BottleHead Tube Amplifiers for the Audio Enthusiast

Sunday, July 30th, 2017

Research Links 


The target audience is obviously quite willing to spend. Below is an example Craigslist ad:

This amp is a beauty both sonically and physically. If you haven't paired a SET amp with your high efficiency speakers yet, you're missing out. This amp is warm and musical with excellent channel separation. Bass is excellent; full but not flabby. Power output is around 3.5 watts per channel. Your speakers should be 90db+ efficient, prefereably 95db+. The Stereomour can be used as both an integrated amp or a stand alone amplifier. It has 3 RCA inputs and volume control. Demos welcome. 

The JJ 2A3-40 tubes alone are 260 new. I have other 2A3 tubes I can sell this amp with and lower the price accordingly. Choices are JJ 2A3-40 (full price), Electro Harmonix 2A3 Gold (subtract 100), or Sovtek's (subtract150). I'll throw in a few NOS driver tubes for you to roll, as well. Also included is the stock walnut base and owner's/instruction manual.

I have a bunch of other gear available for sale, too, including the tube preamp in the photo.

Custom 12sn7 CCDA tube preamp – 800
KEF 104/2 speakers, partially restored – 550
Tekton Lore speakers w/ grills and ClarityCap upgrade – 700
Yamaha A-S801 integrated amp – 650
Paradigm Monitor 9 speakers – 300


High Quality and Safe Copper Plating – by A_Steingrube

Wednesday, July 12th, 2017

Research Links

La Crosse WWV Synced Clock

Sunday, June 25th, 2017

Research Links


LASER Printers – How they work and subsequent uses of their parts

Tuesday, April 25th, 2017

Research Links

There are many applications for LASER printer parts detailed on YouTube and elsewhere.

A video of the hexagonal mirror in operation. It spins very rapidly and must have an indexer to allow position and speed control.

How to Build a Lifter or Ionocraft

Sunday, January 22nd, 2017

Gold Nuggets with Metal Detector in Gold Mine Australia

Friday, January 20th, 2017

The nuggets they dig up in Australia are quite a bit bigger than you see being found in the USA.

CEN-TECH 60725 Infrared Non Contact Thermometer Hacks

Tuesday, December 6th, 2016


This is a black body radiation method of reading an objects temperature.  A previous model had a serial port on the PCB inside the unit.  I will explore inside later to see if this model has also.

Research Links