Precision ES-500 (Part 1/3)

Workshop Project #26 - Precision ES-500

Where do I start? "Precision" is the name of a US company that seemed to be rather huge in the radio and TV repair component business in the 1940s and 1950s. I first learned about them when I was just looking for a "VTVM". I found one, the "Model 98" and the industrial design and huge meter movement spoke to me. Since then, I tried to get my paws on as many of their devices from the same general timeframe as possible. The E-200-C frequency generator had a "sample application" in the manual, that included a scope that looked interesting: The ES-500. And after a bit of waiting, I actually managed to find and procure one! Woohoo! But like all the other similar devices, it was... well... not doing so well? Join in and find out why it took over a year to finish this one project!

NOTE 1: I know, it's "Precision Apparatus" not "Precison Instruments", but the meter movement of the VTVM said "Precision Instruments" - which seems to be a department or subsidiary; and that name stuck in my head, so I'll probably misattribute it for some time...

NOTE 2: The video is edited in a way that makse sense, not strictly chronologically. Thus it is normal for components that I already fixed and cleaned, to appear broken and dirty again in a "later" scene. Strict chronological order would make it a bit confusing to watch.

0:00 Intro / Overview
1:55 First Impressions / Opening Up
3:52 The Insides! / Bezel
5:08 Front Panel / Assessment
6:48 Capacitor Removal
9:06 Transformer Removal / Owner's Manual
10:44 Transformer Disassemble / Unwinding
12:29 Rewinding Transformer
14:55 Choke Cleanup / Input Attenuator
16:33 Potentiometer Cleanup! Line + Intensity
19:20 ...Focus / ...Phasing / ...Sweep Vernier
22:24 End of Part 1 / Credits / Outtake
Music:
My Train's A Comin'
Unicorn Heads
(YouTube Audio Library)

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Видео Precision ES-500 (Part 1/3) канала atkelar