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 4th June 2012, 06:02 PM   #21
diyAudio Member
 
doozerdave's Avatar
 
Join Date: Feb 2012
Location: Kitchener, Ontario
Quote:
Originally Posted by gingertube View Post
Latest project (order from a friend) is a Push Pull 6V6 guitar amp using all 6SL7 octals for the preamp and phase splitter (concertina).
I just finished a quad 6V6 PPP amp (using 9 pin dual-triode preamp tubes) using a concertina phase splitter and the feel and sound is fantastic. I briefly tried an LTP PS and it made the ouput harsh and the feel was way too snappy. I'm using a big OPT out of my Fender Super Reverb so there is a tonne of headroom and the LTP PS was too much.
__________________
-Dave
  Reply With Quote
Old 4th June 2012, 11:35 PM   #22
diyAudio Member
 
Join Date: Oct 2004
Location: Adelaide South Oz
Dave,
It has been my view for a while that the concertina splitter is one of those "best kept secrets" of great guitar amp design although I note that it is making a come back. A lot of people arre starting to use them again. I found best results when using a high mu triode (12AX7, 12AT7, 6SL7) which tends to emphasize the sonic "warts" of the concertina and it is those "warts" which sound good in a guitar amp. This is in contrast to the concertina used in a HiFi Amp where a low mu triode is best (12AU7, 6DJ8).

Did you use the Merlin Blencowe recommended big grid stop on the concertina triode?

Cheers,
Ian
  Reply With Quote
Old 5th June 2012, 02:16 PM   #23
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Blog Entries: 8
Update - using a rediculously over-done linear power supply (126v @ many amps) to alter the cathode voltage of the 2nd valve, I've managed to get the amplifier running A2. More power!!

Chris
  Reply With Quote
Old 5th June 2012, 09:48 PM   #24
diyAudio Member
 
doozerdave's Avatar
 
Join Date: Feb 2012
Location: Kitchener, Ontario
Quote:
Originally Posted by gingertube View Post
Dave,
It has been my view for a while that the concertina splitter is one of those "best kept secrets" of great guitar amp design although I note that it is making a come back. A lot of people arre starting to use them again. I found best results when using a high mu triode (12AX7, 12AT7, 6SL7) which tends to emphasize the sonic "warts" of the concertina and it is those "warts" which sound good in a guitar amp. This is in contrast to the concertina used in a HiFi Amp where a low mu triode is best (12AU7, 6DJ8).

Did you use the Merlin Blencowe recommended big grid stop on the concertina triode?

Cheers,
Ian
I didn't use a fixed grid stopper as I have my master volume control right before the concertina. I'm currently using a 12AX7 in there, and have tried several other tubes, but have also found that the AX sounds the best. I will definitely be using concertina PI's in the future.
__________________
-Dave
  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
How can I modify this grommes little jewel amp for guitar. JZatopa Tubes / Valves 10 2nd April 2010 10:39 PM
Modify & build out (2) Western Electric 300B / 2A3 Hammond monoblock amps & UTC LS-5 quality sound Tubes / Valves 0 9th May 2009 03:59 PM
How to modify Our Bass Guitar Pickup? thomgun_lc Instruments and Amps 28 22nd June 2008 06:25 PM
modify eagle el84 for guitar psychosteve Tubes / Valves 7 17th November 2004 10:58 PM
Op Amps in Solid State Guitar Amps MrGuitardeath Instruments and Amps 1 11th February 2004 07:43 PM


New To Site? Need Help?

All times are GMT. The time now is 09:33 AM.


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