# | Project | Cntry | Main Page | Description | Parts | Tubes | Type | Subtype |
1 | Hi-Fi AM Radio | AU |
Elliot Sound
| [Scroll down articles page to article on AM Radio]. Quite and eye-opener. See the charts in the middle of the page. | 5 | [-] | AM Receiver | Hi-Fidelity AM |
2 | Opamp Design and Test Board (IC-based) | AU |
Elliot Sound
| [Click to Project 41 from projects page.] Included here because I like the explanation of the hacksaw tool for PCB development. | 15 | [-] | Construction Hints | Breadboards |
3 | Thermo-Fan | AU |
Elliot Sound
| [Click to Project 42 from projects page.] Temperature sensor turns on 12V computer fan when temperature reaches a certain level. | 12 | [-] | Construction Hints | Cooling |
4 | Electrocution and How to Avoid It | AU |
Elliot Sound
| [Scroll down articles page to article on Electrocution]. Very important. | 1 | [-] | Construction Hints | Electrocution |
5 | Build Your Own Heatsink | AU |
Elliot Sound
| [Scroll down articles page to article on Build Your Own Heatsink]. | 1 | [-] | Construction Hints | Electrocution |
6 | A Better Log Potentiometer | AU |
Elliot Sound
| [Click to Project 1 from projects page.] Apparently, the “log” pots you buy are really two linear pots. This simple circuit creates a better approximation of log. | 2 | [-] | Construction Hints | Potentiometer |
7 | Variable Amplifier Impedance Circuit | AU |
Elliot Sound
| [Click to Project 56 from projects page.] “More of an article for experimenters”. | 14 | [-] | Construction Hints | Variable Impedence Circuit |
8 | Spring Reverb Unit for Guitars and Keyboards | AU |
Elliot Sound
| [Click to Project 34 from projects page.] IC-based | 10 | [-] | Guitar Amplifier | Reverb |
9 | Guitar Sustain Unit | AU |
Elliot Sound
| [Click to Project 92 from projects page.] IC-based. | 25 | [-] | Guitar Amplifier | Sustain Unit |
10 | Guitar Vibrator Unit | AU |
Elliot Sound
| [Click to Project 49 from projects page.] IC-based | 10 | [-] | Guitar Amplifier | Vibrator |
11 | A-B Switch Box | AU |
Elliot Sound
| [See last project “X” on projects page]. Allows switching between speakers, etc. Very high-end approach. | 8 | [-] | Ham Accessory | A-B Switch Box |
12 | A-Weighting Filter for Audio Tests | AU |
Elliot Sound
| [Click to Project 17 from projects page.] Supposedly, this corrects for the fact that the human ear hears different frequencies differently. I like the reference to the “British Standard Ear”. | 10 | [-] | Ham Accessory | A-Weighting Filter |
13 | Audio Millivoltmeter | AU |
Elliot Sound
| [Click to Project 16 from projects page.] Essentially, a sound meter. | 15 | [-] | Ham Accessory | Audio Voltmeter |
14 | Distortion Analyzer | AU |
Elliot Sound
| [Click to Project 52 from projects page.] Use with an oscilloscope, etc. | 6 | [-] | Ham Accessory | Distortion Analyzer |
15 | Pink Noise Generator for Audio Testing | AU |
Elliot Sound
| [Click to Project 11 from projects page.] With pink noise, the power in octaves of different frequency is the same. (In white noise, power increases with frequency). IC-based. | 20 | [-] | Ham Accessory | Pink Noise Generator |
16 | Simplest Ever PC-Based Power Switch | AU |
Elliot Sound
| [Click to Project 118 from projects page.] Basically, how to hook a power strip up to your PC so you can turn power on and off to peripherals. | 2 | [-] | Ham Accessory | Power Switch |
17 | Simple RF Measurement Probe | AU |
Elliot Sound
| [Click to Project 74 from projects page.] “It won't tell you what frequency your transmitter is on, but it will tell you if it is oscillating”. | 4 | [-] | Ham Accessory | RF Probe |
18 | VU and PPM Audio Meter | AU |
Elliot Sound
| [Click to Project 55 from projects page.] | 5 | [-] | Ham Accessory | VU Meter |
19 | LED VU Meter | AU |
Elliot Sound
| [Click to Project 60 from projects page.] IC-based | 20 | [-] | Ham Accessory | VU Meter |
20 | Build an Electrostatic Loudspeaker | AU |
Elliot Sound
| [Click to Project 105 from projects page.] IC-based. | 18 | [-] | Other | Loudspeaker |
21 | Infra-red Remote Control | AU |
Elliot Sound
| [Click to Project 110 from projects page.] IC-based. | 10 | [-] | Other | Remote Control |
22 | Xenon Strobe Light | AU |
Elliot Sound
| [Click to Project 65 from projects page.] Warning not only cautions about shock, but about possibility of causing epeleptic fits. | 15 | [-] | Other | Strobe |