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Bose® 901 Series II Active Equalizer #66380 Repair

From Rain City Audio:

This Bose® 901 Series II Active Equalizer #66380 came through for an overhaul just recently. The owner in California reported that he got these from his father, and the equalizer was sending only the right channel signal. 25 more words

Vintage

Dynaco ST-70 Stereo High Fidelity Tube Amplifier

From Rain City Audio:

I recently got to work on another vintage stereo kit, the Dynaco ST-70 amplifier. These were powerful, 35W per channel stereo amps typically using a pair of 6L6GC, EL34, or similar power tubes. 247 more words

Electronics

Bose® 901 Series IV Active Equalizer #265335 Overhaul

From Rain City Audio:

This Bose® 901 Series IV Active Equalizer, #265335, just came through the shop for an overhaul. It’s owner bought this equalizer as a part of getting his Bose® system back up and running and sent it right to Rain City Audio reporting the left channel was out. 133 more words

Vintage

Bose® 901 Series I Active Equalizer #9724 Overhaul and Upgrade

From Rain City Audio:

This rare early-production Bose® 901 Active Equalizer, serial #9724, came through the shop recently for an overhaul. It’s owner reported that both channels would cut out intermittently, the switches were noisy, and the power lamp was flickering. 76 more words

Vintage

Bose® 901 Series IV Active Equalizer #223227 Overhaul

From Rain City Audio:

This Series IV Active Equalizer, #223227, just came through for an overhaul. The owner reported it wasn’t making any sounds, just providing a DC offset on the output jacks which was giving his power amplifier some trouble. 92 more words

Vintage

Dynaco FM-3 High Fidelity Tuner Repair

I recently got to work on a very interesting Dynaco FM tuner, the FM-3, which was in the shop for an overhaul. The owner reported it wasn’t working that well anymore, which isn’t a surprise given it’s age. 178 more words

Vintage

Bose® 901 Series I Active Equalizer #7790 Repair

From Rain City Audio:

This rare early-production Bose® 901 Series I Active Equalizer, serial #7790, came through the shop recently for an upgrade. It’s original owner bought this new in 1969 and kept it in use until it began to act up. 100 more words

Vintage