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Author Archives: retrovoltage
First Ever Bose 901 Series 1 Active Equalizer Repair
While some other projects have been pending information and parts, I’ve had a chance to work on the Bose 901 Series 1 equalizer that’s been on my bench for a couple of weeks. The equalizer is a necessary component of … Continue reading
Identifying Your Bose 901 Series 1 Equalizer
Bose 901 Series I Active Equalizers came in two varieties, which can be used interchangeably, but have fairly different circuit designs. It’s simple to tell them apart for ordering parts for a repair with a quick inspection of the inside. Both … Continue reading
Posted in Electronics, Projects, Vintage
Tagged Active Equalizer, audiophile, Bose, Bose 901, capacitor, capacitor replacement, Equalizer, hi-fi, repair, Series 1, Series 2, Speakers
4 Comments
Fixing a 1934 Simplex Model P Dual Band Vintage Radio
I picked up this 1934 Simplex Model P Dual Band radio for my personal collection about 7 months ago, but haven’t worked on it much until this weekend. It sat on my articulated chassis stand in the corner waiting for … Continue reading
Posted in Projects, Radios and Tubes, Vintage
Tagged antique radio, capacitor replacement, Dual Band, model p, repair, restoration, simplex, tube radio, vacuum tube, vintage radio
17 Comments
Repairing the Farnsworth K-262P Vintage Radio
I recently worked on a Farnsworth K-262P from between 1948 and 1951. His wife bought the radio to listen to records, and it came to me with reports that it had been working for a time but had inexplicably gone … Continue reading
Posted in Projects, Radios and Tubes, Vintage
Tagged ac/dc, antique radio, capacitor, capacitor replacement, Farnsworth, K-262P, phonograph, record player, repair, restoration, series string, tube radio, vacuum tube, vintage radio
8 Comments
Dell Inspiron 1545 with Broken LCD Screen – Dumpster Laptop Repair
My apartment has what I like to affectionately call the “free pile”, where neighbors leave things they were throwing out but might have too much value to throw in the compactor outright. I’ve left a few things there myself, and … Continue reading
Posted in DIY, Electronics, Projects
Tagged 1545, broken LCD, broken screen, computer, cracked screen, Dell, dumpster, dumpster diving, fix it, fix it yourself, free, Inspiron, laptop, LCD, LED, neighbors, notebook, recycle, repair, replacement, screws, victoria, wires
4 Comments
1938 Philco 38-C-12 “Coronation” Radio Repair
I’ve had this radio on my bench for a little while, and she’s finally back up and running – and it plays great! It’s a 1938 Philco 38-C-12, special edition to commemorate the crowning of King George IV and Queen … Continue reading
Posted in Photos, Projects, Radios and Tubes, Vintage
Tagged 1938, 38-12, 38-12A, 38-C-12, 38C12, american radios, Antique, antique radio, Coronation, King George IV, philco, Queen Elizabeth, repair, restoration, tube radio, vacuum tube
7 Comments
Highway Advisory Radio Interference in Seattle from Saskatchewan (CBK)
Flammable cargo was prohibited under the Washington State Convention Center on I-5 last weekend according to the large Smarter Highways signs along SR-520 in Washington, as there’s some sort of maintenance happening. There’s a highway advisory radio station on 530 AM … Continue reading
Posted in Commentary, Radios and Tubes, Technology
Tagged AM, broadcast, canada, CBK, CBK-AM, distance, DX, highway advisory radio, interference, invasion, PRI, Saskatchewan, seattle, smarter highways, The World, Watrous, WSDOT
1 Comment
Build Log and Review: Mable Audio VT-86PP Kit Hi-Fi Amp Project
About a year ago, someone left a comment that really looked like spam on one of my pages advertising a web store selling tube audio gear and parts for guitar and audio amplifiers. Against everything I’ve ever learned about behaving … Continue reading
Posted in Electronics, Hardware, Photos, Projects, Radios and Tubes, Technology
Tagged 12AX7, 6P6P, 6V6, 6V6G, Amp Kit, amplifier, build log, build photos, capacitor, China, Chinese, construction, diy, EL34, EL84, hi-fi, Kit, Mable Audio, Mableaudio, projects, quality, recommendation, review, Shenzhen, soldering, Technology, Tube Amp, tubes, vacuum tube, VT-86pp
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Antique Tube Box Art
I took a gamble on a box-lot of parts from Craigslist, and it turned out to be an excellent find. One of the things I found was a collection of tubes in their original boxes from 1926. That doesn’t happen … Continue reading
Posted in Photos, Radios and Tubes, Vintage
Tagged 01A, antique radio, Arcturus, art, AX-301A, box art, Craigslist, Cunningham, CX-301A, Montgomery Ward, rca, triode, tube, tube box art, UX-201A, vacuum tube, vintage radio
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RETROVOLTAGE 
How Television Benefits Your Children [Vintage Ad]
Motorola, leader in television, shows how TV can mean better behavior at home and better marks in school! Own a Motorola and you know you own the best. Does that clown look terrifying to anyone else?