Category Archives: DIY

A Surprise in a Re-Stuffed Capacitor

I was recently re-stuffing some capacitors for a radio. It’s not something I do often, but I’ve accumulated a pile of pulled vintage caps over the years so I have some on hand if a customer requests the most detailed … Continue reading

Posted in DIY, Electronics, Radios and Tubes, Vintage | Tagged , , | 2 Comments

Bad Caps in Everything

I just had a bit of a scare with my Audio Precision analyzer. The 2004-era Dell OptiPlex GX270 which drives the AP hardware decided it would refuse to power up – just flashing the “ON” light for a fraction of … Continue reading

Posted in Computers, DIY, Electronics, Test Equipment | Tagged , , , , | 3 Comments

Mercury Switch Find

Digging through a seldom-used parts bin, I made a cool discovery: a set of four mercury switches, still intact: These are used as tilt and vibration sensors in mechanical systems. They’re heavy from the mercury inside, and it sloshes around … Continue reading

Posted in DIY, Gadgets | Tagged | 3 Comments

AUX in Volvo Stock Head Unit Radios

Dangerous Prototypes shares an article detailing how Karl Hagström hacked an aux input to his 2007 Volvo V70 stock stereo. Why, why, why isn’t there an AUX input on my car stereo from 2007? Yes 2007 was before the big … Continue reading

Posted in Commentary, DIY, Electronics, Gadgets | 1 Comment

Bose® Active Equalizer Test Platform

This project is going to take a while since I’m slammed in the shop, but I’m in the process of converting a Bose® 901 Series I Active Equalizer to  a test platform. With sockets for the transistors, and clip connections … Continue reading

Posted in Audio, Bose, DIY, Electronics, Stereo, Test Equipment | Tagged , , , , , | 3 Comments

Neat Little 60FX5 Stereo Single-Ended Tube Amplifier

While digging around, I came across a really simple circuit in the RCA Receiving Tube Manual describing a 1WPC stereo amplifier using only two tubes, the 60FX5 power pentodes, and a single silicon diode. The 60FX5s have high enough gain … Continue reading

Posted in Audio, DIY, Projects, Stereo | Tagged , , , , , | 2 Comments

Watch: a home machinist makes a clock from scratch, right down to the screws and washers

This is up there with Claude Paillard creating early 1920s-style triode vacuum tubes entirely by hand in his home workshop: Chris from Clickspring is building a skeleton clock from scratch using a home machinist’s shop, and documenting it in lavish, hypnotic … Continue reading

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