DIY Audio Projects Forum
 NEW  Matt presents bias and operation data for the 6V6 tube in SE operation - 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Optimization.

DIY Audio Projects Forum

Welcome to the DIY Audio Projects Message Forum. Use these forums to discuss Hi-Fi audio and to share your DIY Audio Projects. Registration is free and required to post messages and view the file attachments. Registration will only take a minute and registered users do not see any advertisements. After you have completed the online registration process, check your email (including spam/junk folder) for the verification email to activate your account. New members are under moderation - so your posts will not be visible until approved by a moderator. See the Read Me 1st, Forum RULES and Forum FAQ to get started on the forum.

It is currently 21 Feb 2018, 19:50

All times are UTC - 6 hours [ DST ]




Post new topic Reply to topic  [ 6 posts ] 
Author Message
 Post subject: Jean Hiraga "Le Monster"
PostPosted: 15 Feb 2018, 20:47 
Offline
Project Author
User avatar

Joined: 06 Jun 2008, 18:23
Posts: 4834
Location: Australia
I thought I may have started a thread with this amp but can't find it. I populated the Hiraga brds. 20years ago but then they just sat around. Amps now finished. Meant produce 8W of pure class A and is a DC amp. Only four stages. A couple of FETs split the signal then each side amps one half.

Only 80,000uf of storage where many farads are suggested. On my 19ltr 2-ways and sounds great. Stacks of low forceful bass and fully-sick-3D soundstage. Needs a few days burn in but already very enjoyable.
Attachment:
image.jpeg


This post has a file attachment. Please login or register to access it. Only Registered Members may view attached files.


_________________
Projects: "Sanctum" - 12AU7 and 6AS7 direct coupled headphone amp | "retro-Oatley 6J6" - 6J6 push-pull headphone amp with OPTs | "Mimic Carbon" - carbon resistors and PIO caps. MM phono preamp
Website: retro-thermionic


Top
 Profile  
 
PostPosted: 15 Feb 2018, 21:00 
Offline
Editor
User avatar

Joined: 28 May 2008, 21:53
Posts: 4530
Location: Winnipeg, CANADA
Good work Mark. I'm glad I'm not the only one who has populated boards sitting around unused.

Schematic and pcb from original Le Monstre article are here: http://diyaudioprojects.com/Solid/Jean- ... e-Monstre/

_________________
[ DIY Mains AC Power Cable Cord ] - [ Gobo LM1875 Amp Kit ] - [ Tang Band D4-1 Horn Speaker Kit ] - [ Monoblock Push-Pull KT88 Tube Amp Kit ]


Top
 Profile  
 
PostPosted: 16 Feb 2018, 02:30 
Offline

Joined: 09 Oct 2012, 19:43
Posts: 266
Location: Vancouver Canada
I have built and use two of these amps. One for my tweeters and the other is for background spkrs. I loved them from the first i heard them. And i was lucky enough to get 20 each of the original 2SK170 and 2SJ74 at a cost of $20.Can. Shortly after they disappeared and then showed up in places for amounts like $46. for one set of 2 x 2SK170's. Then the knock offs. Gees hard to keep track but they are slowly being found / manufactured again. TG! The 2SK170 is very popular.


Top
 Profile  
 
PostPosted: 16 Feb 2018, 05:21 
Offline
Project Author
User avatar

Joined: 06 Jun 2008, 18:23
Posts: 4834
Location: Australia
I have a number of 2SK170s.

_________________
Projects: "Sanctum" - 12AU7 and 6AS7 direct coupled headphone amp | "retro-Oatley 6J6" - 6J6 push-pull headphone amp with OPTs | "Mimic Carbon" - carbon resistors and PIO caps. MM phono preamp
Website: retro-thermionic


Top
 Profile  
 
PostPosted: 16 Feb 2018, 13:38 
Offline

Joined: 09 Oct 2012, 19:43
Posts: 266
Location: Vancouver Canada
The 2SK170 are popular in many projects. On another note Mark, if i find it, i have a phono preamp that used, I think 12 BJT trans for the front end (per chnl). It is dead quiet. I also built the JFET RIAA phono pre that you built with batteries for supply. Both pre's are dead quiet but i didn't have the time to A/B the two types as far as sounding but both work as well as the other. I moved and they are now in boxes,,,,,somewhere here.


Top
 Profile  
 
PostPosted: 16 Feb 2018, 17:29 
Offline
Project Author
User avatar

Joined: 06 Jun 2008, 18:23
Posts: 4834
Location: Australia
All my Le Pacific and Boozehound MC stages use this FET.

_________________
Projects: "Sanctum" - 12AU7 and 6AS7 direct coupled headphone amp | "retro-Oatley 6J6" - 6J6 push-pull headphone amp with OPTs | "Mimic Carbon" - carbon resistors and PIO caps. MM phono preamp
Website: retro-thermionic


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

All times are UTC - 6 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 10 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
cron
DIY Tube Projects :: DIY Tube Amp Kits :: DIY Speaker Projects :: DIY Solid State Projects :: DIY IC / Op-amp Projects :: DIY Phono Projects :: DIY Cable Projects :: Hi-Fi Audio Schematics
© diyAudioProjects.com - Terms of Service - Privacy Policy