Go black or go around? - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 22nd October 2007, 03:14 AM   #1
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Default Go black or go around?

I have some Silmic 1000 μF cathode bypass caps installed in my 6V6 preamp. The tone and body is awesome from that unit, but since the Devil will find work for idle hands to do, I wonder if it will benefit from Black Gate N (red non polars) or it will be better to bypass the Silmics with a couple of SCR Teflon blue ($$$) 0,47 μF caps that I have. Opinions?
  Reply With Quote
Old 22nd October 2007, 04:30 AM   #2
diyAudio Member
 
dsavitsk's Avatar
 
Join Date: Jan 2005
Location: Hartford
My experience is that the Blackgates are better than the Silmics, but how about biasing with red LED's instead, or fixed battery bias using the teflons as input couplers?
  Reply With Quote
Old 22nd October 2007, 04:40 AM   #3
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Hmmm... adding yet another coupling to the circuit, defies the point of a better cathode sound....doesn't it? Also achieving 15V that I need there, calls for a rather long string of LEDS. Will they work as well as a couple that the norm is? In what way you prefer Black Gates soundwise? More palpable and energetic than the Silmic? Do you ever bypass with small film caps? They can add constructively on cathode bypass caps. Any experience on that?
  Reply With Quote
Old 22nd October 2007, 06:23 AM   #4
diyAudio Member
 
dsavitsk's Avatar
 
Join Date: Jan 2005
Location: Hartford
What I meant was that if you bias the grid with a battery and connect the cathode to ground, then you have gotten rid of the cathode cap. But, you will need an input coupling cap as the grid will be at -15 w/r/t/ ground. The upside is that you trade an electrolytic in the signal path for a small teflon in the signal path -- and, since the input impedance is large, you can probably use a much smaller cap that the 470n.

For a string of LEDs, see SY's red light district amp.

Blackgates are, in my experience, more detailed and less flat sounding. Truthfully, I like the Cerafines a lot more than the Silmics, too. Bypassing sometimes works well, sometimes doesn't, and my experience there is that it can be really unpredictable. But, if you have the caps, give them a try.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Black domtw Multi-Way 25 26th December 2013 12:14 AM
Black Oil frank2395 Analogue Source 3 6th July 2005 02:00 AM
The Man in Black is gone Peter Daniel Music 10 15th December 2003 12:19 AM
The black dot peranders Forum Problems 5 7th February 2003 04:00 PM


New To Site? Need Help?

All times are GMT. The time now is 05:34 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2