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Building a Resistance Calibration Standard

I decided to build a resistance standard, for use with my test and measurement gear and good enough that I could some calibration on test and measurement equipment owned by other people. I wanted to build something that would not be prohibitively expensive and that would allow me to reliably calibrate the resistance ranges of […]

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Servicing the Legendary Technics SL-1200 Direct-Drive Turntable

I’ve just finished servicing three Technics SL-1200 direct-drive turntables. It seemed like the perfect opportunity to discuss this legendary design and look at basic cleaning and servicing techniques. The Technics SL-1200 hit the market in 1972 and there was nothing else like it when it was first released. It was so popular over the span

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Mackie HRS120 THX Subwoofer Review

I want to tell you about an amazing subwoofer that few people know about – the awesome Mackie HRS120 THX studio subwoofer. The HRS120 is a monster, weighing in at nearly 50kg and able to deliver 400 watts continuously, via a proper high-power linear amplifier and power supply. All this power is fed into a downward-firing 12-inch

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Ericsson Ericofon ‘Cobra’ Phone Repair Attempt…

A friend of mine recently asked me to take a look at her Ericsson Ericofon, commonly known as the Ericsson ‘Cobra’ phone, just the other day. I was away from home and so I had no test and measurement gear, no soldering iron, no tools, but we made do with a few things she had

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Gorgeous Luxman SQ-505 Integrated Amplifier for Sale

UPDATE – SOLD! One of the nicest pieces I currently have for sale is this gorgeous, vintage, one-owner from new, Luxman SQ-505 integrated amplifier. Priced to sell at a ridiculous $395, contact me for details. This amp is a vintage model, made in 1968 or 69 and being a Luxman it’s a very cool piece.

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