Step up tranny to boost guitar signal ?

[Colas LeGrippa]

Hola amigos,


In order to build a clean boost, I have imagined a stompbox with a 1:2 step up transformer.
I have in stock old  preamps from a mccurdy broadcast board with good quality audio transformers. Anybody has done that b4 ?


Thanks

[PRR]

The usual guitar pickup is already wound as high as it can be without too much treble loss.

Eat your spinach.

[shooter]

I've used a 1:2 Inter-stage tranny, in circuit it was more like 1:1 after loading.

[Colas LeGrippa]

What about if I use only one half from the primary winding to make it 1:4 then ? I am not worried much about treble loss since the trannies are from highest quality  ( and more, I am 50 percent deaf....)


Thanxx

[sluckey]

hey buddy. In the hour between your first and second posts you could have had your answer and eaten lunch too.   

[pdf64]

A 1:2 transformer will quarter the input impedance.
1:4 will divide it by 16! So 1M is seen by the guitar as 62k.
And the input miller capacitance will be magnified.

[Colas LeGrippa]

Sluckey, I didn't have lunch I was busy taking care of Linda


Ok so my idea is not good impedance wise.
I ll go back to what I m better at, arpeggio  workout


Thamx buddies

[thetragichero]

might not understand your objective, but dual op amps (tl072 or ne5532 are what i'd use) are cheap as chips and what you'd want for a clean boost
remember, there's no free lunch

[Colas LeGrippa]

Op amps ? Never.  I already have a marvelous12ax7 signal boost somewhere that I use from time to time.  I just imagined the step up tranny trick as an easy way to boost up the guitar signal  ( since I have many of them ) but I did not know about the impedance issue that would occur.
No free lunch ? Not for me