Find:
About Me
Blogs
- Antique Radio Blog
- Arcane Radio Trivia
- Audio Tweak
- Audioklassiks
- BuildLounge
- Classic Receivers
- Coffman Labs Blog
- Confessions of a Part-Time Audiophile
- EEVBlog
- Engineering Radio
- Glowbugs Times
- Glowbugs Web
- Guitar Fool
- Hack a Day
- HeavyDIY
- High on Solder
- Ilektronx
- MicroSyl
- Nick's Radio Corner
- Old Stock Audio
- Pragmaddux
- Radio Stuff
- Radio Time Traveller
- Richard Sears, Vintage Electronics
- Seventies Stereo
- The Paleotechnologist
- The Signal Path
- Tube Addict
- TubeSound
Friends
Resources
- 901
- Active Equalizer
- AM
- amplifier
- Antique
- antique radio
- audiophile
- Bose
- Bose 901
- Bose Active Equalizer
- Bose Equalizer
- bose equalizer repair
- bose repair
- capacitor
- capacitor replacement
- cost engineering
- Craigslist
- eBay
- Equalizer
- fried electronics
- GE
- General Electric
- grunow
- grunow 586
- grunow 589
- grunow chassis 5-U
- grunow radio restoration
- ham radio
- hf
- hi-fi
- HP
- KN0CK
- laptop
- LCD
- LF-116
- old radio
- oscilloscope
- philco
- photos
- power supply
- projects
- radio
- rca
- rebuild
- repair
- replacement
- restoration
- RTL-SDR
- RTLSDR
- SDR#
- seattle vintage radio repair
- Series 1
- series I
- series II
- series IV
- shortwave
- soldering
- Sony
- Speakers
- speaker spotter
- stereo
- stromberg-carlson
- test equipment
- transistor radio
- tube
- Tube Amp
- tube radio
- up-converter
- Upconverter
- vacuum tube
- vintage
- vintage ad
- vintage radio
- Westinghouse
- zenith
Categories
December 2025 S M T W T F S 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Meta
Tag Archives: repair
Bose Repair: 901 Series I Equalizer #31131
My workbench has been absolutely swamped lately, so I’ve been rather slow on writing up the projects I finish. I’ve finally had a little bit of time to put some of this down on paper and the first thing cleared … Continue reading
Posted in Electronics, Radio, Speakers, Vintage
Tagged Bose, Bose 901, Bose 901 Series 1, Bose 901 Series I, capacitor, capacitor replacement, Equalizer, repair, restoration, Series 1, Series 2, vintage
3 Comments
1931 Westinghouse Columaire WR-8 Grandfather Clock Radio
I’ve had the privilege of working on this 1931 Westinghouse grandfather clock radio, the Columaire WR-8. These are a very beautiful and desirable early piece of radio engineering and featured a New Haven Westinghouse electric clock in the front and … Continue reading
Posted in Radios and Tubes, Vintage
Tagged Antique, antique radio, Columaire, radio, radio parts, radio tubes, repair, restoration, tube radio, vacuum tube, vintage, vintage radio, Westinghouse, wr-8
11 Comments
Overloaded 1931 Transformer [Fried Electronics]
I’m working on a 1930/31 Westinghouse WR-8 Columnaire clock-radio which had a bad transformer. The filter capacitors failed and shorted the high-voltage secondary, burning it open and causing a lot of heat and melting. The replacement is a General … Continue reading
Posted in DIY, Electronics, Projects, Radio, Vintage
Tagged antique radio, fried electronics, old radio, radio, repair, restoration, tube radio, vacuum tube, vintage radio
3 Comments
A Most Convoluted 1934 Philco 66B Antique Radio Repair
Recently, I took in a beautiful Philco 66B for repair. Manufactured in 1934, this chassis ended up in several different models – a couple of tombstones, a cathedral, and at least two console radios. They’re all 5-tube radios with the … Continue reading
Posted in DIY, Projects, Radios and Tubes, Vintage
Tagged 1934, antique radio, philco, philco 66b, radio, repair, restoration, tube radio, vacuum tube, vintage, vintage radio
14 Comments
1934 Silvertone 1708A Repair and Restoration
I recently had the pleasure of working on a 1934 Silvertone 1708A which was brought to me for repair locally. This was great – having a radio repaired can be a big decision, so I’m happy to show off my … Continue reading
Posted in DIY, Projects, Radios and Tubes, Vintage
Tagged 1708A, Antique, antique radio, classic, old, radio, repair, restoration, Silvertone, tube radio, vacuum tube, vintage, vintage radio
4 Comments
Bose 901 Series 1 Equalizer #29827 Repaired!
I recently got to fix up another Bose 901 Series 1 equalizer which I received for repair. These are some of my favorite electronics to work on – they’re easy to work on and each one has its own history. … Continue reading
Posted in Electronics, Projects, Speakers, Vintage
Tagged 901, Active Equalizer, Bose, Bose 901, capacitor, capacitor replacement, Equalizer, hi-fi, repair, Series 1, vintage
2 Comments
Bose 901 Series 1 Equalizer #35793 Plays Again! [Repair]
I recently had a chance to repair another Bose 901 Series 1 equalizer. This makes quite a few of these that I’ve written up on here. One of my favorite things about seeing copies of the same model is getting … Continue reading
Posted in Electronics, Projects, Speakers, Vintage
Tagged 901, Active Equalizer, Bose, Bose 901, capacitor, capacitor replacement, Equalizer, repair, resistor, restoration, vintage
1 Comment
Thrift Store Jamo MPA-101 Repaired – She’s Back Up and Running!
I started working on a Jamo MPA-101 amplifier back in August for a friend and after some early work it sat for a while. He’s re-doing his audio system at home so I spent a few hours to finish troubleshooting … Continue reading
Posted in DIY, Electronics, Projects, Speakers
Tagged 600hz, amp, amplifier, audio, cable, distortion, hack, Jamo, Klipsch, MPA-101, oscilloscope, probe, repair, replacement, resistor, Rigol, scope, soldering, stereo, volume
11 Comments
Bad Capacitors Strike Again
I’m working on another Bose 901 Series 1 equalizer. It looks to be the same manufacturing run as the first one I wrote up last July, uses the same components, and those components look like they’ve had the same failure … Continue reading
Posted in Electronics, Hardware
Tagged Bose 901, capacitor, cost engineering, Equalizer, fried electronics, repair, restoration, Series 1
9 Comments
Depression-Era Radio: 1934 Grunow 460 Tombstone
I’ve had this Grunow 460 sitting in my queue pending for a little while and it’s finally on it’s way home looking great! There was a fun extra bit of detective work to identify and solve the issues that came … Continue reading
Posted in Projects, Radios and Tubes, Vintage
Tagged antenna coil, antique radio, capacitor, grunow, grunow 460, grunow radio restoration, old radio, repair, restoration, tombstone, tube radio, vacuum tube, vintage radio
2 Comments