Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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

Quick Ecl86/6gw8 Amp
Quick Ecl86/6gw8 Amp
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
Thread Tools Search this Thread
Old 12th July 2007, 12:00 AM   #1
cammy666 is offline cammy666  United States
diyAudio Member
Join Date: Jun 2007
Default Quick Ecl86/6gw8 Amp

Hey guys,
I recently got adquired a Hammond AO-44.
Here is the schematic for the amp -->
Click the image to open in full size.

I added a 1/4 jack in it and got some 15w speaker and it sounds nice, but when i turn up the volume it has a LOT of BASS.
I am using a single 4ohm speaker for now, i am going to get another one and connect it in series to see if it still sounds so bassy with the 8ohm load.

I want to mod this amp into something that will have a nice distortion and i have a spare ECC82.

Q: what would happend if i use the ECC83 inside the ECL86's for the preamp and use an additional ECC82 for the phase inverter?
Is this possible or i would HAVE TO use the triode section of the 6GW8 as the phase inverter?

I dont want to completly tare the amp out, just change some values araund so i can make it sound better. i am fairly new with tubes and i been fishing araund for schematics....

Can you guys please give me some sugestions?

i would apreciate it very much.
  Reply With Quote
Old 12th July 2007, 12:51 AM   #2
Tom Bavis is offline Tom Bavis
diyAudio Member
Tom Bavis's Avatar
Join Date: Jun 2002
Location: Macedon NY
You can leave the amp section alone and add another gain stage and tone controls. Fender and most of the other guitar amps use a tone control section that has a notch in the lower midrange, which generally sounds better than a "flat" response with a guitar.

Look at ax84.com for some circuit ideas.
  Reply With Quote
Old 12th July 2007, 03:48 AM   #3
cammy666 is offline cammy666  United States
diyAudio Member
Join Date: Jun 2007
i am still curious on using the triode sections of the ECL86's as the gain stage for the amp and using an ECC82 for the phase inverter.
Supposing is possible to do that,
What set up will create more distortion?

I found this Marshall schematic online and its pretty easy to follow thru....

Click the image to open in full size.
Questions arrised as i looked at this amp tho.
1) Is the ECC83 here used for tremolo only?
2) no feedback is used on this amp ?

  Reply With Quote


Quick Ecl86/6gw8 AmpHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
ECL86 - quick and dirty beamnet Tubes / Valves 44 1st April 2012 07:54 AM
6gw8 /ECL86 El Cheapo modifications bbuz Tubes / Valves 13 24th June 2008 02:16 AM
Substitute for 6gw8 in Heathkit aa-32 oldheathkitphil Tubes / Valves 3 23rd May 2007 12:20 AM
6L6 for a beginner, plus ECL86/6GW8 jsp Tubes / Valves 22 8th April 2007 11:09 PM
Help with 6GW8/ECL86 tubes?? fluckscapacitor Tubes / Valves 5 11th October 2005 03:46 AM

New To Site? Need Help?

All times are GMT. The time now is 01:11 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio