Home SET Asylum

Single Ended Triodes (SETs), the ultimate tube lovers dream.

[ Follow Ups ] [ Post Followup ] Thread: [ Display  All  Email ] [ SET Asylum ]
[ Alert Moderator ]

RE: Cathode bypass cap value 300B SET question

"As far as I know, the value is calculated in function of the cathode resistor value."

The cathode resistor value is part of the calculation.

The cathode bypass cap has to bypass the impedance of the cathode of the tube (rk) in parallel with the cathode resistor value (RK), giving us (r).

If you don't take the impedance of the cathode itself into account the cap value you calculate will be way to small.


Here's a spreadsheet. Input the plate resistance of the tube (Rp), the total load impedance RL (in the case of an output tube, the output transformer's primary impedance), the value of the cathode resistor (RK), the mu of the tube and the desired -3db down point (f3).

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"


Edits: 08/09/15 08/09/15
This post is made possible by the generous support of people like you and our sponsors:
  Signature Sound   [ Signature Sound Lounge ]

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.

[ Top Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2024, Audio Asylum, all rights reserved ]
[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]