Author Archives: retrovoltage

1974 Sony STR-6200F Receiver Overhaul and Alignment

Posted on June 19, 2015 by retrovoltage

I recently got to work on a pretty big, fairly rare Sony receiver from 1973-74: the STR-6200F. It’s a powerful receiver featuring 60W per channel of power available, with quite a few inputs and outputs, and a strong FM tuner … Continue reading →

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The Speaker Spotter – Speakers of Craigslist: June 3rd, 2015

Posted on June 3, 2015 by retrovoltage

It’s back – the Speakers of Craigslist, a periodic round-up of what’s interesting on my local Craigslist these days. Sorry for the hiatus, putting these together is a bit of work! As always, I am not affiliated with any of … Continue reading →

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Hands On with the new Acer Chromebook 13

Posted on June 2, 2015 by retrovoltage

I was recently in the market for a new laptop to replace my aging ProBook 4415S. It was a middle of the road HP business laptop from 2009, and over the years I’d upgraded the RAM to 4GB and installed … Continue reading →

Posted in Commentary, Computers, Gadgets, Technology | Tagged , , , , , , , , | 2 Comments

Marantz 2270 Stereophonic Receiver Overhaul and Adjustment

Posted on May 26, 2015 by retrovoltage

I recently got to work on another iconic piece of hi-fi history, the Marantz 2270 stereo receiver. I’ve had this model through my shop before, as well as a couple of other 22xx receivers and they’re well built and generally … Continue reading →

Posted in Audio, Electronics, Hi-Fi, Projects, Stereo, Vintage | Tagged , , , , , | 4 Comments

ANOTHER fine achievement in radio set design

Posted on May 23, 2015 by retrovoltage

Radio Retailing, Apr. 1929

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Need 45V batteries for your old radio?

Posted on May 21, 2015 by retrovoltage

Rayovac has been making batteries for over 100 years, and their batteries were commonly found in use with many types of battery-operated tube radios. Most commonly, radios would operate on 45V batteries with a tap half-way (for 0-22.5-45V). Two in … Continue reading →

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“We’ll See You at the Trade Show!”

Posted on May 20, 2015 by retrovoltage

Radio Retailing, Apr. 1929

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Factories Making CeCo Tubes

Posted on May 19, 2015 by retrovoltage

CeCo Plant No. 2, now partially in operation and to be finally completed in April – located at Providence, R.I. Radio Retailing, Apr. 1929

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Raytheon, “The Healthy Tubes”

Posted on May 17, 2015 by retrovoltage

What makes these tubes healthy compared with the others, anyway? Radio Retailing, April 1929

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The Audak Electro-Chromatic Pick-Up

Posted on May 16, 2015 by retrovoltage

Throughout the music world AUDAK Reproducers have long been the standard by which others are judged and valued. Their ability to respond to every shade and colortone…so essential to REAL music…has been faithfully transmitted to the AUDAK Chromatic Pick-up, creating … Continue reading →

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