DG’s Practical Notes, R#8 - Phonola 687A-U, 1957-1958 [v2]

DG’s Practical Notes
© 2021-2025 Daniele Giacomini, [email protected]
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======== Content of this video ========
00:00 Front cover
00:10 ⚠ Warning
00:20 Table of contents
00:40 Introduction
02:17 Schematics
04:10 The I.F. transformers are okay
04:52 Starting the refurbishing process
08:00 Rectifier
09:07 Power supply adaptation
10:42 Antenna adaptation
11:20 Trimmer R37
12:21 Restringing the dial cord
13:08 TV/FM selection
13:59 Cabinet
16:12 Dangerous by design ⚡
19:35 Reveal
24:53 Written documentation coming along with this video
25:50 Back cover
==================================

Tags: vacuum tubes, antique radios, old radios, vintage radios, old electronics, vintage electronics, vacuum tube equipment

References:
Wikipedia, Phonola, https://it.wikipedia.org/wiki/Phonola
Wikipedia, FIMI, https://it.wikipedia.org/wiki/FIMI_(a...)
Phonola advert, magazine Noi Donne, n. 37, 1961, page 35, https://noidonnearchiviostorico.org/s...
Radiomuseum, Phonola 687A-U, https://www.radiomuseum.org/r/phonola...
Elettroni al tramonto, Phonola 687 vers. A-U, Schema e componenti https://elettronialtramonto.forumfree...
Elettroni al tramonto, (1037) Phonola 687 A U, Una radio di cui non so la storia… https://elettronialtramonto.forumfree...