1934 RCA Victor T4-8A Bluetooth Upgrade

From Rain City Audio:

This was an interesting little project which came through the shop, a 1934 RCA Victor T4-8A cathedral radio. This radio had been fully restored, down to the bare metal of the chassis and completely re-wired by a boutique restorer, then it was on to Rain City Audio for some specialized finish work for its new owner.

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The restorer did an immaculate job, removing and polishing every component and re-painting the transformers, running all new wire and all new components.

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First up was the addition of a passive mixing network and some coupling capacitors. This radio uses an interesting, reflexed arrangement for its IF/Detector/1st Audio stage, but tapping into it is straightforward.

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On the backside, the radio got a switched outlet for powering the Bluetooth receiver, and some small adhesive pads to hold it all in place. I shortened the length of the power cable between the USB power supply and the receiver for good measure.

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Configured this way, the radio receives AM and has its volume controlled through the front panel; the Bluetooth audio’s volume is controlled by the source. And with this, the 1934 radio gets a new life playing anything its owner chooses.

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This entry was posted in Electronics, Projects, Radios and Tubes, Vintage and tagged , , , , , , . Bookmark the permalink.

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