Loewe-Opta Magnet 3737W tube radio restoration - Part 1. First look some preliminary testing.

Published at : 23 Dec 2025

Loewe-Opta Magnet 3737W tube radio restoration log part 1. This tube radio follows the German 'tradition' of the age - creating great tube radios of exceptional quality and often, some over-engineering.
This particular model was sold in 1958/59, and comes with a LW, MW and FM, as well as a pick-up input which is great for connecting modern line-level devices.

You can see the complete playlist for this restoration at:
https://www.youtube.com/playlist?list=PLy5M_tA9ux7J_hzDhnF8rs2c7wmgGfRlK

All info on this model at: http://www.radiomuseum.org/r/loewe_opta_magnet_3737w.html

See also my playlists on some other complete restorations.

Loewe-Opta Truxa Stereo 4741W:
https://www.youtube.com/playlist?list=PLy5M_tA9ux7KhVk0KqPx0Wkh2KO_5f2fQ

Braun Atelier 3:
https://www.youtube.com/playlist?list=PLy5M_tA9ux7L3k5nPRvrk1aH764QRCTqE

Graetz Musica 4R417:
https://www.youtube.com/playlist?list=PLy5M_tA9ux7Ios98E59dWjwc2SRJyxwIn

SABA Freiburg W2:
https://www.youtube.com/playlist?list=PLy5M_tA9ux7IqvS-LshUGpE1D_WY6mrZe

Graetz Comedia 616:
https://www.youtube.com/watch?v=fwmW9k3TwNE&list=PLy5M_tA9ux7L5sAApLzV6xoYzmRNJpMW5

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Capacitor Leakage Tester:
https://www.youtube.com/watch?v=0pySErvzUIY&list=PLy5M_tA9ux7KWexvEjLB0SANSxQXi0zTS

Re-stuffing filter capacitors in this tube radio:
https://youtu.be/WVn9k13nXvo

Replace Selenium rectifier with silicon diodes:
https://youtu.be/NkKOe0YU2_I