guitar4geek: fender

Showing posts with label fender. Show all posts

Friday, November 4, 2022

Building a 5W tube amp Fender Champ AA764 model copy

It is a fender AA764 (silver face) copy, with some mods:

- Solid state rectifier (FRED diodes)
- Standby switch
- NFB pot and switch
- Two Fat switches

- One Bright and treble tone cap switch
- Master Volume
- Coupling cap value 6x switch (before the master vol pot)
- 6V6 Tung-Sol and 12AX7 Tung-Sol
- Orange drop capacitors

- EL84 paralell tube socket option (not tested). * Using one or another (6V6 or EL84)

- Presence switchable control

- Mid control

- TMB turn-off switch

- GB128 speaker

** AA764 is a 5F1 with TMB tone control and a little diferent NFB.

Pictures:

Optional EL84 socket:

Tuesday, December 31, 2013

Fender Bullet 15 Amplifier Mod (Updated)

That's a crazy mod, I made some aleatory holes in the backpainel to have more a open cabinet sound, and more 3D sound.
And also changed the speaker conductors for a all copper 0,5 mm, instead of a thin tinned copper, IMO this was a improvement for a SS amp.
A mod for the driver channel is cut R23 ( 220K ), LD1, LD2, CR1, CR2 out, and put the JFET/LED circuit, to turn the overdrive more cracked and crisp (IMO). I will try the 2n7000 mosfet, as soon as possible.

See the pictures:

Friday, December 21, 2012

Building a 5W tube amp Fender Champ 5f1 model copy

It is a fender 5f1 (tweed) copy with some mods:

- Solid state rectifier (FRED diodes)
- AA764 power source resistors values
- Standby switch
- One knob traditional tone control
- NFB pot
- Resistive attenuator
- Fat switch
- Master Volume (V 2.0)
- 100nF for the second coupling cap (before the vol pot)
- 6V6 United Electron and 12AX7 Tung-Sol
- PIO capacitors (V 2.0)

* I have tried Carbon Comp Resistor as a plate resistor, but the amp has showed up a little hiss noise. So I m still using metal film resitors all around.

👉 ** updated photos HERE (V 2.0)