Can I Rebuild It? Do I Have The Technology? Can I Make It Better? • 1957 Eico HF-52 Tube Amp • P5

Welcome to part five of the Eico HF-52 tube amplifier series. In parts one through four I stripped this horribly-built 1957 amp down to its bare cadmium-plated chassis and repainted it. In this episode I’ll rebuild the amp and see if I can get it to make beautiful music again. Here are the topics covered in this video and the time stamps:

0:00 Intro
0:27 The Assembly Manual: Good as Heathkit?
0:46 Let’s Build!
2:56 I Break/Fix a Tube Socket Pin
4:08 Death to Safety Capacitor
5:31 Do I Use The Original Line Cord?
5:44 Polarizing The Non-Polarized Plug
5:52 Making a Strain Relief
6:08 117V or 125V Primary Winding?
6:31 A Thermistor Does The Trick
7:00 Fuse Holder as Terminal Strip Problem
7:15 15 Amp Fuse? Really?
7:24 Bias Selenium Rectifier Gets Retired
7:35 Diode Dropping Resistor
8:03 I Test The Original Tubes
8:10 12AT7s Bad. 12AX7s Good.
8:20 Let’s Review The Work
8:29 Capacitor Foil Sides
8:32 The Missing Clamp
8:35 Protecting/Color Coding Cloth Transformer Wires
8:42 Twisted AC Wires Reduce Hum
8:46 Early Integrated Circuits For Tone/Loudness
8:54 Making Shielded Cables
9:06 Soldering Ground Points to Chassis
9:13 New Multi-Section Can Caps
9:20 First Startup
9:30 Red Plating & Rectifier Tube Disaster
9:37 Bye Bye Bugle Boy
9:43 What’s Wrong Old Blue?
9:59 The Fix
10:03 A Microphonic 6C4 Tube
10:12 Biasing. What Is It? Why Do We Do It?
11:09 Bottom Plate Modification
11:31 Demonstration

To learn more about safety capacitors, click:
   • Dynaco SCA-80Q Amp Kit P5 • Main Chassis A...  

To learn more about thermistors, click:
   • Restored Antique Radio! Will It Work?  

To learn more about replacing selenium rectifiers, click:
   • How To Replace Selenium Rectifiers • Choos...  

To see all the videos in this series, click:
   • Old Blue • Eico HF-52 Amp  

To visit my Amazon Shop, click here:https://www.amazon.com/shop/fluxconde...

#tubeamp #tubeamplifier #highfidelity #1950s

Vacuum tube amp repair, restoration and demonstration.