Crystal Radio-A Good 1N34A Diode Substitute (4K) @tsbrownie

Uploaded May 2024 | Updated September 2026, 2 weeks ago

I've gotten a lot of suggestions for alternatives to the 1N34A diode as a detector in crystal radios. I have tested several, including power diodes like the 1N4007 (not worth showing) and the Schottkey diodes (on the oscilloscope it looks good, but is muffled compared to the 1N34A or D9K in actual use).

=========================
1N34A
Forward voltage drop: 1V @ 5mA
Breakdown voltage: 65V @ 1mA
Reverse leakage current: 30µA @ 10V, 500µA @ 50V
Flat Junction capacitance
Lower leakage current
Absolute Maximum Ratings: (TA = +25C unless otherwise specified)
Peak Inverse Voltage, Repetitive (I R = 1mA), PIV 65V
Reverse Voltage DC, V R 20V
Peak Forward Surge Current, Non−Repetitive (t = 1sec), IFSM 0.5A
Peak Forward Surge Current, Repetitive, I FSR 200mA
Average Rectified Output Current, I O 50mA
Operating Junction Temperature, T J +75C
Storage Temperature Range, Tstg −55 to +75C

=========================
D9K
Maximum reverse voltage U(BR) 30 V
Maximum forward current IF 60 mA
Maximum reverse current IR 60 uA
Forward voltage drop at the pn-junction U(F) 1 V
Frequency range, maximum Fd 100 kHz

Crystal Radio-A Good 1N34A Diode Substitute (4K)

Crystal Radio Making A Variometer (Remixed & Condensed)(4K)

PSA: Crystal Radio-Bad Earphone Pt 3 **FIXED!!!** (4K)

$Stirling Engine With Propeller (4K) This is another style of Stirling engine. It has a propeller on it, but Im not sure Id want it powering my airplane! Stirling Engine - How It Works In Simple Terms: https://youtu.be/Q5QEBqjkNjo OTHER STIRLING ENGINE VIDEOS (including this one): Stirling Engine Specs For DIYers https://youtu.be/kokzk1xMk9Q Unusual Stirling Engine Teardown & How It Works https://youtu.be/m_cg4rGdggY Stirling Engine With Propeller https://youtu.be/s6Kh7wkJN-M Stirling Engine - How It Works In Simple Terms: https://youtu.be/Q5QEBqjkNjo Building A Stirling Engine, Laminar Flow Type, First Attempt Part 1 https://youtu.be/QQ4nqy4GHJI Stirling Engine Doubling Efficiency Experiment https://youtu.be/Iqg9Nz-8Vwc Thermo Acoustic Stirling Engine - Simply Genius https://youtu.be/TEiBScfR4Vk Stirling Engine w/ Generator - Gamma, Walking Beam Style https://youtu.be/1x7Bo-dVsR4 Stirling Engine w/ Generator Power Measurement https://youtu.be/bZqB_qwDbqI Stirling Engine w/ Generator, 2 Piston Gamma Type https://youtu.be/Xmb19QVJPqw Stirling Engine - High Temperature, 2 Piston Gamma https://youtu.be/Ji2oQ40_M0c Stirling Engine That Uses Ice for Fuel??? https://youtu.be/kCbfVgBwv6Q Stirling Engine - Low Temperature https://youtu.be/1BbfGe5Shgg WARNING: Hot parts, open flame, flammable liquids. Danger of fire and burns. Not for children. This model vibrates badly and the fuel can gets way too hot. Use proper precaution. If you dont know, learn first or do not do it. Table-top size models produce only a tiny fractions of the power provided by a similarly sized steam or gas engine. Reverend Stirling was appalled by the number of his parishioners killed or maimed by boiler explosions in the early days of steam. He set out to build an engine that would not require or produce high pressures during operation. His air engine, now known as the Stirling, was the result. Today, its efficiency (as high as 50% in some examples) and ability to use almost any heat source, including waste heat, allow it to fill niches that steam and gas engines cannot. - Marv Disclaimer: This information is presented as entertainment only on an as is basis and any use the viewer makes of it is solely up to them, and it is their responsibility to determine if the information remains current and if it is applicable to their situation. The viewer is responsible for any and all safety involving this. Viewing this video is the viewers agreement to these terms and conditions. If you do not agree, stop now. #stirling #cleanenergy #StirlingEngine #DIYScience #Thermodynamics #d4a$

Foxhole Radio Blued Razor Blade BOMBSHELL, EXPLOSIVE Finding!!! ;) Pt 1/2 (4K)

Crystal Radio: AM-FM Thats NOT A Crystal Radio (But Still Interesting)

Crystal Radio Coil Sizing-Real Examples (4K)

Electric Control Valve Teardown (& New Video Equipment Test)(4K)