5F1 Parts List

Building a Fender Champ-style amplifier is a fun project for a qualified electroncs engineer! Here’s a parts list that includes JJ tubes and Hammond transformers. This list assumes you’re building a typical Fender Champ circuit, such as the Champ 5F1 model.

Parts List for Fender Champ Build

Tubes

1. Preamp Tube:
   • 1 x JJ 12AX7 (or 12AT7 for slightly different gain characteristics)
2. Power Tube:
   • 1 x JJ 6V6 (or 6L6 for higher power output)

Transformers

1. Power Transformer:

   • Hammond 291AEX  (provides 240V AC and filament voltage for the tubes)

2. Output Transformer:

   • Hammond 1750c for a 4ohm speaker or 1760C for 4,8, and 16ohm options (ideal for a 5W Champ-style amp)

Chassis and Cabinet

1. Chassis: Check out our Chassis here

2. Cabinet:

   • Pine or birch plywood cabinet (dimensions according to Fender Champ specs, typically around 17" H x 19" W x 10" D)

Components

1. Resistors: (we recommend 1 watt Metal oxide unless otherwise stated ) Found here

   • 2 x 68k
   • 1x 1M
   • 2 x 100k
   • 2 x 1.5k
   • 1 x 220k
   • 1 x 22k
   • 1 x 470Ω 
   • 1 x 10k 2watt found here
   • 1 x 22k 2watt found here

2. Capacitors: All capacitors can be found here

   • 2 x 8uF (450V electrolytic)
   • 1 x 16uF (450V electrolytic)
   • 2 x 25uF (25V metal film)
   • 2 x 0.022uF (630V metal film) 

3. Potentiometers:

   • 1 x 1MΩ audio taper (volume)
   • 1 x 1MΩ linear taper (gain)

4. Other Components: Most found here

   • 1 x 3-way switch (for power)
   • 1 x Fuse holder and fuse (typically 1A)
   • 1 x ¼” output jack
   • 1 x ¼” input jack

5. Miscellaneous:

   • Hook-up wire (18-20 AWG)
   • Terminal strips
   • Tube sockets (1 x 12AX7, 1 x 6V6)
   • Heat shrink tubing
   • Standoffs, screws, and nuts for assembly
   • 1 x Speaker 10” speaker, such as a Jensen p10R

Notes

• Safety First: Make sure to follow safety precautions while working with high voltages. Read this information first
• Layout: It's crucial to plan your layout for the chassis and wiring before starting the build to ensure it fits and functions correctly.
• Testing: Always test your build step-by-step to troubleshoot issues as they arise.

Feel free to adjust the component specifications based on your preferences and availability!

This list is based on the Rob Robinette version found here

Rob's website is an excellent source of information into how an amp works. Check it out.