Buildind a alnico speaker amp cabinet

It is a new super nice project, a 12 inch guitar amplifier cabinet using a alnico speaker (Ted Webber). 

Amazing clear and musical sound...

Tip: I always use a lot of white glue and some screws on the wood junctions.

Here the pictures:

Building a tube amp Fender Champ AA764 model copy

 It is a fender AA764 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:

Rhythmic values of notes

 

An attempt to understand and visualize rhythm notation...  

 

* M -> Metronome click

Vintage electronic magazines

Very good and easy vintage magazines about basic electronic

Hello friends, for the people in portuguese language, who are interested in electronic, and wishes it in a simple language, here it is, a periodic brazilian magazine of the 80's. Thanks to the professor Bêda Marques.

Click below:

https://datassette.org/revistas/be-ba-da-eletronica

Old retro magazines:

Old RIP projects:

Bass Cut (ES 345 and Lucilly Varitone) for a Les Paul

Varitone or Bass cut - mod, lets cut some basses off (customized for a Les Paul)

Hello friends, now I became curious about the varitone circuit (bass cut circuit) used in the gibson ES 345, and decide to try a shot. After a lot of searching for the circuit at internet, I started making experiences in a les paul with a old pickup as the inductor, and I liked the results. Then I bought a new inductor ( 1,5 Henry - I guess) and capacitors, the result, after testing some capacitors values in series, is a custom version for les pauls as bellow, see the final schematic:

A six positions selector switch:

The 1,5 Henry inductor (I've used some hot glue to fix it):

Adding the capacitors and a resistor:

Don't forget: http://guitar4geek.blogspot.com/2013/05/audio-capacitors-do-have-polarity.html

The complete mod:

The chicken head knob and final result:

Sample:

 New version 2.0:

** Ultimate version 3.0: **

  

Tone cap Updated:

The Orange Drop (22nF) tone capacitor mod:

It provides a more balance and a slightly brighter tone.

Les paul Pickup upgrade and magnet swap (Seymor Duncan 59 and Pearl Gates)

Les paul Pickup upgrade and magnet swap (Seymor Duncan 59 and Pearl Gates)

Hello friends, Its a humbucker pickups upgrade. I've got tired of my Burstbuckers (not pro) 1 and 2 copy, then I bought a Seymour Duncan Pear Gates Bridge (A2) and a 59 neck (A5), I guessed the 59 sounded a little boomy (lot of basses). The end of the history, I've swaped the pickups magnets: Alnico 5 to Alnico 2.
Now I have a Pearl Gates A5 and a Duncan 59 A2. Showed at the video below:

0:26 neck; 0:45 bridge; 1:05 both pickups

Headphone adapter to a 5W 5f1 champ

Headphone adapter to 5w 5f1 fender champ model, resistive passive circuit. Resistive load and a hight-pass capacitor switch (V2).

 

Atention: 

• Values has been tested at a 5W amplifier, not higher.

• Allways starts to use with the volume at minimal.

  
  

First version V1:

* 5n6 capacitor to produce a fake stereo effect

 

 

 

Second version V2:

• Volume knob
• left/off/right fake stereo effect switch

* Porta pro headphones are veeery good.

A twenty four fingerboard neck guitar notes chart

These is a map to the twenty four guitar neck, six strings and twenty four fingerboard. Each pentagram below is a guitar string.

Stratocaster tremolo piezo + piezo mod

This is a mod to adapt a under saddle acoustic guitar piezo to a stratocaster block tremolo anda a common piezo inside the guitar body.

 

• Use a rotary tool and a file to make a groove at the upside of the block:

• ... until the piezo fit it, with only a small part outside:

   

• Screw the other parts of the tremolo with the piezo wire out of the block:

*Maybe you will have to file the wood of the guitar under the bridge, a litle bit, to adapt the extra wire.

•  Othewise, if you don't use the tremolo arm, like me, it is possible to use the other side of the block, making a extra hole to pass the wire:

•   Set up the tremolo at the guitar, use the grounding hole to pass the piezo wire and conect it to the guitar circuit. Some hot glue will fix better some parts:

•  Next step....fix a common piezo at the inside of the guitar body, near as possible of the bridge, using a double face tape:

   

 

The tromolo piezo will have a lot of influence of the coils, producing a lot of reverbation. My sugestion is to mix the two piezos with a resistor (or a pot) like that:

 

* 1M or less... depends on the piezo output level.

Finaly, mixing the pickup mod (http://guitar4geek.blogspot.com.br/2016/06/stratocaster-wire-mod-series-pickups.html) with this piezo mod:

*All pots are 500K

* Other suggestions:

Sample:

Tks to Pete from MukerBude.de: http://www.mukerbude.de/_MATERIAL/Anleitung%20-%20Stratylon.pdf