New project; Musical Machine - 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 28th January 2010, 11:38 PM   #1
diyAudio Member
 
Join Date: Jun 2009
Location: Berlin
Default New project; Musical Machine

So I am embarking on my next project (won't actually start construction for a little while) and have decided on Poinz' Musical Machine.

I've got most of the basic parts but have a quick question before I finish buying everything. I've read lots of talk about two different tubes in the driver slot, a 5965 or a 6GK5. I've got both, but have no idea why I should go with one over the other.

More questions to come, but that's a start.
  Reply With Quote
Old 28th January 2010, 11:53 PM   #2
diyAudio Member
 
Join Date: Oct 2004
Location: Maui, Hawai'i, USA
The 6GK5 is much superior. 60% more gain, 15% lower Zout, more linear, and the predicament of finding a computer tube with 5% or better balance between the two devices in the bottle is neatly sidestepped.

Except for a couple pairs for my own clients, I gave my 5965s away.

Aloha,

Poinz
AudioTropic
  Reply With Quote
Old 29th January 2010, 01:21 AM   #3
Cassiel is offline Cassiel  Libya
diyAudio Member
 
Cassiel's Avatar
 
Join Date: Sep 2004
Location: Madrid
Good choice, bigjppop.
You can't go wrong with a 6v6 PP triode amp. No 2a3 amp SE for me, I've tried those.

I started it with the Musical Machine, but nowadays I'm using a floating paraphase splitter stolen from a Leben integrated PP amp.

I agree with Poindexter, the 5965 triodes are rarely matched, but it is a good sounding tube. The LTP splitter needs another tube I guess, Poinz changed the tube, I kept the tube and changed the phase splitter.
Power supply and the output stage remain the same.
__________________
Effeminate Audio
  Reply With Quote
Old 29th January 2010, 03:03 AM   #4
Golana is offline Golana  United States
diyAudio Member
 
Join Date: Aug 2008
Are you doing anything different? Or going with the straight ahead game plan.
Interested, as I'm about to start my build.
  Reply With Quote
Old 29th January 2010, 04:40 AM   #5
diyAudio Member
 
Join Date: Jun 2009
Location: Berlin
Quote:
Originally Posted by Poindexter View Post
The 6GK5 is much superior. 60% more gain, 15% lower Zout, more linear, and the predicament of finding a computer tube with 5% or better balance between the two devices in the bottle is neatly sidestepped.

Except for a couple pairs for my own clients, I gave my 5965s away.

Aloha,

Poinz
AudioTropic
Well I guess straight from the horse's mouth is about as good of an endorsement as you can get. Is there an updated schematic/parts list for the 6GK5 version?
  Reply With Quote
Old 29th January 2010, 04:53 AM   #6
diyAudio Member
 
Join Date: Jan 2007
Location: Iowa
Quote:
Is there an updated schematic/parts list for the 6GK5 version?
Attached Images
File Type: gif mmAud6GKpub.GIF (11.8 KB, 1780 views)
  Reply With Quote
Old 29th January 2010, 05:20 AM   #7
diyAudio Member
 
Join Date: Jun 2009
Location: Berlin
Thanks for the schematic.

Quote:
Originally Posted by Golana View Post
Are you doing anything different? Or going with the straight ahead game plan.
Interested, as I'm about to start my build.
I'm not really sure what can be done "differently." I haven't seen much conversation around here of mods for this amp; it seems most are pretty happy with it just the way it is. I'll using the recommended Silk OPT's and (now) the 6GK5 tubes. Probably no input selector (I only use one source) and a somewhat decent volume pot (probably not the $200 flavor).

I'm definitely open to suggestions/ideas but it seems Poinz has worked this thing over pretty well over several years/iterations.
  Reply With Quote
Old 29th January 2010, 06:04 AM   #8
diyAudio Member
 
Join Date: Jun 2009
Location: Berlin
Oh, and stupid question... one 6GK5 per channel or two? If I'm understanding correctly, the 6GK5 is NOT a dual triode; right?
  Reply With Quote
Old 29th January 2010, 07:42 AM   #9
diyAudio Member
 
Join Date: Jan 2007
Location: Iowa
Quote:
the 6GK5 is NOT a dual triode; right?
correct, two per channel.
  Reply With Quote
Old 29th January 2010, 08:21 AM   #10
diyAudio Member
 
Join Date: Apr 2004
Location: Monroe Township, NJ
Quote:
Probably no input selector (I only use one source) and a somewhat decent volume pot (probably not the $200 flavor).
A good deal more than decent and, at $32.42, rationally priced are PEC hot molded Carbon controls from DigiKey. Look here.
__________________
Eli D.
  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
Musical Machine (etc) Parts: Silk OT's. Ampohm caps, tubes, sockets, nodiak Swap Meet 5 28th January 2010 02:25 PM
FS: parts for Musical Machine PP 6V6 amp jrebman Swap Meet 5 28th October 2009 08:27 PM
Need PS schematic for Musical Machine jrebman Tubes / Valves 18 16th March 2009 10:58 PM
Smoke Machine keantoken Everything Else 0 13th April 2008 09:07 AM
SMD machine? lumanauw Equipment & Tools 7 26th December 2004 12:46 AM


New To Site? Need Help?

All times are GMT. The time now is 07:23 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