Uploaded March 2026 | Updated September 2026, 1 week ago

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Part 2 will be out soon (very much worth the wait, I promise)

In part 3 we go through one of the amps in-depth and talk about all the parts we are replacing and why and then we bench test the push pull EL84 amplifier.

Links for items I used in the restoration:

Y2 Capacitor
amzn.to/41rsyYh

Thermistor CL-70
amzn.to/4t88s1g

Hakko FR-301 Desoldering Tool
amzn.to/4rW77JY

Hakko FX888DX-010BY - Digital Soldering Station
amzn.to/41t3Bf2

MG Chemicals - 4887-454G 63/37 Rosin Core Leaded Solder, 0.05" Diameter, 1 lb Spool
amzn.to/4szcDmR

Fluke 179 Multimeter
amzn.to/47nOt6b

Dremel 8250-5 12V Lithium-Ion Variable Speed Cordless Rotary Tool
amzn.to/4c1oiF3

Dremel Bits
amzn.to/4bHz2ab

Greenlee 1950-SS Pro Stainless Wire Stripper, Cutter and Crimper, 10-18AWG
amzn.to/4t2sPg3

Greenlee 1917-SS Stainless Wire Stripper and Cutter, 16-26AWG
amzn.to/487iHKV

Liquid Solder Flux Dropper (30 ml/1 Oz.)
amzn.to/4da5N2o

CAIG Laboratories D5S-6 CAIG DeoxIT Contact Cleaner
amzn.to/4t7oCrp

Pamona Test Leads for QA403 565-EM4970-24#
https://mou.sr/3Q0fWow

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Video Breakdown:

0:00:00 - Introduction
0:00:05 – What happened to Part 2?
0:00:43 – Orient Ourselves to the Amp
0:02:03 – Keeping Original Coupling Caps?
0:04:12 – Short Schematic Walkthrough
0:07:22 – WIMA Caps Strike Again
0:08:25 – Can Capacitor Removal
0:04:12 – Short Schematic Walkthrough
0:17:02 – Death Cap Replacement
0:17:47 – Finding The Outer Foil On Coupling Caps
0:24:48 - Testing & Replacing other Components
0:35:33 - Tube Selection
0:38:50 - QA403 Analysis
0:40:30 - Two Final Tips