Switchable Hi-Z input impedance, how ? - Page 11 - diyAudio
Go Back   Home > Forums > Live Sound > Instruments and Amps

Instruments and Amps Everything that makes music, Especially including instrument amps.

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 28th March 2012, 02:24 PM   #101
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
no

well, maybe the higher gain of ecc83 would be to have

my cheapskate effects are a bit noisy, and thickens the lower mids at higher level
and that is exactly what Im trying to avoid
so it seems Im still far from 'my sound'

I have ordered the new Palmer Deepressor pedal
but on backorder
  Reply With Quote
Old 29th March 2012, 01:41 PM   #102
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
hmm, 7025(ecc83) input tube with ecc88(6DJ8) output(buffer)

need to decide on trafo voltage
  Reply With Quote
Old 11th April 2012, 09:16 PM   #103
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
ok, I got the Aikido mono solo boards
it will be my instrument input

and I expect my two channel Burning BA-3 (NelsonPass) will look like this
this will be my output gain/buffer

now I need some power supply parts
Attached Images
File Type: png BA-3 bass guitar print.png (52.4 KB, 55 views)
File Type: jpg IMG_6575.JPG (144.6 KB, 54 views)
  Reply With Quote
Old 13th April 2012, 05:48 PM   #104
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
going to order trafo

planned voltages

0-195-215-235 (100mA)
maybe 100mA is a bit high for a preamp, I dont know ?

6.6-3.3-CT-3.3-6.6 (1.5A)

0-18 / 0-18 (1.5A)

and maybe I would like exstra voltages for effects, 0-9-12-15V

maybe getting a bit complicated in one trafo
  Reply With Quote
Old 13th April 2012, 09:07 PM   #105
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
BA-3, a full ground plane seems to make sense here

and where a hot connection is needed, I will just route away with engraving bit
a hybrid combination of hard wire and hole mount

would be really nice to have a small tool to route around the holes
Attached Images
File Type: png BA-3 bass guitar print.png (83.1 KB, 48 views)
  Reply With Quote
Old 14th April 2012, 06:19 AM   #106
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
old thread, but might be worth reading

12AU7 vs 12BH7 vs 6CG7
  Reply With Quote
Old 16th April 2012, 11:08 AM   #107
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
trafo ordered from Toroidy

0-195-215-235V (110-120mA)
6.6-3.3-CT-3.3-6.6 (1A/2A)
2x 18V (2A)
special audio quality
  Reply With Quote
Old 26th April 2012, 08:43 AM   #108
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
possible preamp 'configuration'
Attached Images
File Type: png BA-3 bass guitar 3 block.png (36.7 KB, 41 views)
  Reply With Quote
Old 29th April 2012, 07:21 AM   #109
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
had a lucky day

guess I will have to build my own 'power brick' now
Attached Images
File Type: jpg IMG_6657.JPG (173.2 KB, 38 views)
File Type: jpg IMG_6648.JPG (163.4 KB, 6 views)
File Type: jpg IMG_6650.JPG (148.6 KB, 7 views)
File Type: jpg IMG_6654.JPG (131.2 KB, 6 views)
  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
Switchable balanced / unbalanced input buffer nigeljking Analog Line Level 4 12th September 2011 12:03 PM
How to design input stage with specific input impedance/pot value mahleriana Tubes / Valves 0 16th November 2009 09:37 PM
Input Impedance Bengali Analog Line Level 7 15th August 2007 10:24 PM
Input impedance nhuwar Tubes / Valves 24 23rd July 2007 11:11 PM
Input pot and input impedance Bricolo Parts 1 19th March 2003 01:59 PM


New To Site? Need Help?

All times are GMT. The time now is 05:22 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