Commonwealth Pro Audio - 1973 Fender Twin Reverb Partial Restoration

CommonwealthProAudio.com

Here's a '73 Twin Reverb we bought to restore to glory.

It had a ton of issues that we addressed:
cut off power cord
mismatched and missing tubes (power and preamp)
shredded pots
blown speakers
out of tolerance grid resistors

Time Stamps:
0:15 - Accessing Filter Caps
0:33 - Mismatched and Missing Power Tubes
0:41 - Testing Power Tubes
0:57 - Testing Preamp Tubes
1:15 - 12AT7 in the Wrong Position
2:12 - Verifying Correct Fuse
2:48 - Replacing the Power Cord
3:38 - Mistakenly Cut the End of Ground Wire
3:50 - Fixing Mistake
4:42 - Black Wire o18:03 - n Power Cord
5:45 - White Wire on Power Cord
6:18 - Testing Amp Through Light Bulb Limiter (LBL) to Verify Power Trans.
6:31 - Inserting New Power Tubes
7:10 - Testing Amp Through LBL After Tubing
7:43 - Cleaning Pots, Switches, and Jacks
8:30 - Detailed Visual Inspection
9:40 - Example of Connection Issues
10:56 - Checking Grid Resistors
11:48 - Checking Screen Resistors
12:27 - Checking Other Resistors
13:12 - Replacing Two Potentiometers
15:24 - Testing Amp w/ LBL & 16 ohm Load
16:48 - Checking Speakers
17:31 - Checking Reverb Tank
18:03 - Testing Amp at Full Power w/ New Internal Speakers
21:59 - Replacement Parts Overview
22:09 - Sign Off Follow Andy on Spotify:
https://tinyurl.com/SpotifyAndyBranton

Keep track of Andy's live shows:
https://www.bandsintown.com/a/13126507