Home Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

26 preamp

The first one is active crossover. 2C51 amplifies high frequencies, with 22 nF capacitor acting as a high pass filter. The 26 section amplifies low frequencies, with output transformer acting as low pass filter. In this implementation, a cheap output transformer is needed with relatively high leakage inductance.

The choice of 2C51 is strange. Its amplification factor of 35 is grossly mismatched with that of 26 (mu=8). Otherwise, it is a nice linear triode with low Miller capacitance and low Rp, if sections are paralleled.


This post is made possible by the generous support of people like you and our sponsors:
  Parts Connexion  


Follow Ups Full Thread
Follow Ups

FAQ

Post a Message!

Forgot Password?
Moniker (Username):
Password (Optional):
  Remember my Moniker & Password  (What's this?)    Eat Me
E-Mail (Optional):
Subject:
Message:   (Posts are subject to Content Rules)
Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:  Automagically notify you when someone responds.