First Watt M2 - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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 17th February 2010, 07:57 AM   #1
Kovax is offline Kovax  Croatia
diyAudio Member
 
Join Date: Aug 2002
Location: Zagreb , CROATIA
Default First Watt M2

Stumbled across this one searching for info on J2 ...
VERY interesting simplified schematic

http://www.electori.co.jp/FirstWatt/M2.pdf
__________________
If it can't be fixed ... use a bigger hammer
  Reply With Quote
Old 17th February 2010, 09:45 AM   #2
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
tnx

baaad Papa , baad !



depletion mosfets , 2x18Vac xformer , 4x150R repeater coil ...... nice way to Musical Heaven ;

Mu F. as option , 2x150:2x300 (600:1200) repeater coils ..... even greater bliss

as I said several times before - in time of F4 , Papa is givin' us history lesson - just imagine big toobz as 845s on output , and you have what was known as Booster amp

__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote
Old 17th February 2010, 10:49 PM   #3
Bigun is offline Bigun  Canada
diyAudio Member
 
Bigun's Avatar
 
Join Date: Jan 2009
Blog Entries: 2
I'm gobsmacked - I have a similar design on my drawing board - only with BJT outputs. Maybe not the same, I'm looking for the trafo to be my voltage amplifier - or maybe it is the same ? I have two Broadcast quality transformers waiting on hand... now I know I'm on the right track
__________________
"The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.
  Reply With Quote
Old 24th February 2010, 11:02 AM   #4
mos57 is offline mos57  Italy
diyAudio Member
 
mos57's Avatar
 
Join Date: Apr 2006
Location: Catanzaro - Italy
This is a transformer voltage amp. Interesting discussion about are in this thread also:

Transformer as a voltage gain element

Francesco
  Reply With Quote
Old 24th February 2010, 02:39 PM   #5
Tea-Bag is offline Tea-Bag  United States
not politcally affiliated
diyAudio Member
 
Tea-Bag's Avatar
 
Join Date: Feb 2006
Location: Kennebunk
Blog Entries: 7
What is First Watt? What is First Watt?
FirstWatt は Nelson Pass "kitchen-table By Nelson Pass FirstWatt the "kitchen-table", is a brand of handmade production. FirstWatt FirstWatt effective efficiency, high-quality speakers
And we aim to develop low-power audio amplifiers and high quality for very simple.
JFET/Auto-former & Mos-FET JFET / Auto-former & Mos-FET\
M2 J2 FirstWatt 25W+25W (8 Ω ) J2 FirstWatt M2 is followed by a second work, a unique 25W +25 W (8 Ω) class A is Shinguruendosutereopawaanpu.
Single-Ended Triode/SET、。 Single-Ended Triode / SET, the output triode single amplifier was designed under the theme beyond the limits of harmonic distortion. Nonfidobatsu
Sounds like a vacuum tube design in the clock, I'm happy to provide a fresh feel to the audio files are certain limitations to these
M2 。 M2's efforts to develop.
M2 NFB JFET M2 configuration of non-NFB, Class A JFET input buffer operating mode, and features passive voltage amplifier (drive power stage) for the O
Mos-FET 。 Totoransufoma, one of a pair of triode valve has become a Mos-FET output circuit. Here are fresh and unique amplifier design.
。 It is very reliable, simple and stable.
100k Ω 20 4dB、 200 μ V、150W . Input impedance is 100k Ω, damping factor of 20, gain is 14dB, the noise 200 μ V, Pawadoro is about 150W.
。 Here is no plateau 10A です。 The maximum output current is 10A. 。 For the output stage bias circuit has been newly designed. この新 New
Shii circuit temperature, voltage, bias current constant value of locked for hours. するAnd異Na in order to protect the amplifier output overcurrent
Ru only. It does not require adjustments.
(RCA)1 1 Unbalanced input (RCA) 1 in the system, speaker output system 1 is a binding post. LED Left and right front panel blue LED
ch, ch, has a power indicator. Power switch is located on the rear panel.
M2
M2 circuit design is simple and very reliable and requires no adjustments. し It is warm and relaxed, Soshi
Energetic, and combines the precision and detail. Single-Ended Triode/SET、 Excellent speaker system when connected to a high effective efficiency, Single-Ended Triode / SET,
Will be surprised to fine and velvety sound like you are ringing in the triode single amplifier, and bass resolution and better
。 Be relaxed, I become to hear the progress of spatial sound reproduction.
60 。 Wonderfully well in the vacuum tube preamplifier, as fresh and lively in the 60's golden era has been generous, evolving from Rimasu. I
M2。 M2 is to be hoped that the deployment would again like to listen again to have your record collection by. It is many years Kaka
Might Ru, M2 in Please enjoy. Nelson Pass 。 Nelson Pass it now will be delivered from the kitchen.
What is First Watt ? What is First Watt?
First Watt is a "kitchen-table" effort by Nelson Pass First Watt is a "kitchen-table" effort by Nelson Pass
very simple / high quality / low power for sensitive loudspeakers very simple / high quality / low power for sensitive loudspeakers
FirstWatt M2 FirstWatt M2
25W+25W JFET/Auto-former & Mos-FET Stereo Power Amplifier 25W +25 W JFET / Auto-former & Mos-FET Stereo Power AmplifierPage 2 Page 2
Product Specifications
■ Gain: 14 dB
500mV/1W 、3V/ ■ Input Sensitivity: 500mV/1W output, 3V / rated output
+0,-0.5 dB at 20 Hz 〜 25 kHz ■ Frequency Response: +0, -0.5 dB at 20 Hz ~ 25 kHz
25W /1%THD 1kHz 8 Ω ■ Output power: 25W / 1% THD 1kHz 8 Ω
■0.025% THD, 1W 1 kHz, 8 Ω ■ Distortion: 0.025% THD, 1W output at 1 kHz, 8 Ω
■:100k Ω ■ Input impedance: 100k Ω
■ 20 ■ Damping Factor: 20
■500 uV 20-20 kHz ■ Output Noise: 500 uV Anueito 20-20 kHz
■ Balanced CMRR:-60 dB @ 1 kHz ■ Balanced CMRR: -60 dB @ 1 kHz
■160 watts ■ Power Consumption: 160 watts
■ 430 W x 385 D x 143 H mm ■ Dimensions: 430 W x 385 D x 143 H mm
■ 11.62kg ■ Weight: 11.62kg
■ 300,000 ■ Price: 300,000 yen (excluding tax
__________________
Last 2014 Salas GB, Shipped|F5TC Boards and power supplies available PM| Hot-Rod DCB1 boards and kits available PM

Last edited by Tea-Bag; 24th February 2010 at 02:44 PM.
  Reply With Quote
Old 24th February 2010, 02:51 PM   #6
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
if you have F4 handy - just insert appropriate xformer
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote
Old 24th February 2010, 02:56 PM   #7
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Quote:
Originally Posted by Zen Mod View Post
....
Mu F. as option , 2x150:2x300 (600:1200) repeater coils ..... even greater bliss

.....
funny ZM - now I realize that "Mu F." can be read as Mu follower

what I meant is "my favorite " - repeater coil 600:1200 , toroid nickel core

__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote
Old 25th February 2010, 12:48 AM   #8
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
Mu koan:

Q: Does puppy dog have Buddha nature?

A: Mu

  Reply With Quote
Old 25th February 2010, 09:56 AM   #9
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Buddha is
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote
Old 25th February 2010, 10:16 AM   #10
Luke is offline Luke  New Zealand
diyAudio Member
 
Join Date: Sep 2001
Location: Wellington NZ
Send a message via AIM to Luke
Why M2, I thought they were F amps?
__________________
If you give a man a fish he will eat for a day. But if you teach a man to fish he will buy an ugly hat. And if you talk about fish to a starving man then you are a consultant. Dilbert
  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
swans m2 blue934 Multi-Way 0 22nd May 2008 06:56 AM
Kenwood basic m2 Johnny25 Class D 0 20th January 2006 07:48 PM
Stk4050v to M2 implant Junfer Chip Amps 6 8th April 2004 01:46 PM
Tannoy M2 Crossover BlackWidowAudio Multi-Way 0 1st February 2002 11:39 AM


New To Site? Need Help?

All times are GMT. The time now is 10:37 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