Photo Gallery - Page 59 - 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 2nd May 2005, 05:59 AM   #581
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Very nice -- both amps. Two different instances of the same amp... no cookie cutter stuff here

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 4th May 2005, 07:51 AM   #582
Account Disabled
 
Join Date: Sep 2004
Location: Earth
Yes both are nice.
Barossi,
where did you find those mA-meters?They look very nice.
  Reply With Quote
Old 5th May 2005, 11:56 AM   #583
diyAudio Member
 
jeff mai's Avatar
 
Join Date: Aug 2002
Location: Melbourne
Default Not eye candy, but...

...it sure sounds great. This is a PP2A3 monoblock. Lots of Australian made iron! Output and interstage are made by Lancroft - the power supply iron is Black Art Audio.

I prototyped this for a friend. Input is 1/2 6SN7, driver is triode connected KT66. Fixed bias on the 2A3 outputs. Two choke input supplies.

It may be that I've been listening to chip amps too long, but this thing sounds beautiful in mono!

We were going to do the other monoblock with cathode bias (there's another power transformer winding for the extra voltage required) but I'm not sure we'll bother.
Attached Images
File Type: jpg pix 426.jpg (69.6 KB, 2765 views)
  Reply With Quote
Old 5th May 2005, 07:57 PM   #584
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Default Re: Not eye candy, but...

Quote:
Originally posted by jeff mai
Lots of Australian made iron!
I'll say... is iron serving phase split duty?

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 5th May 2005, 08:23 PM   #585
Banned
 
Join Date: Jan 2005
KT66 for driving a 2A3 thats overkill to me Looks like lots of fun prototyping a tubeamp on a piece of plywood like that But what on earth is all he transformers doing there ?chokes ?
  Reply With Quote
Old 6th May 2005, 02:20 AM   #586
diyAudio Member
 
jeff mai's Avatar
 
Join Date: Aug 2002
Location: Melbourne
Default Re: Re: Not eye candy, but...

Quote:
Originally posted by planet10
is iron serving phase split duty?
Of course!

Quote:
Originally posted by Tekko
KT66 for driving a 2A3 thats overkill to me. Looks like lots of fun prototyping a tubeamp on a piece of plywood like that But what on earth is all he transformers doing there ?chokes ?
I think the KT66 is overkill, too, but I can't argue with the sound!

There are 2 power transformers, 4 chokes (two L-C-L-C supplies) plus the interstage and output transformers.

My only complaint is that it's short on gain for use without a preamp. That may not be a problem for the new owner.
  Reply With Quote
Old 10th May 2005, 02:42 PM   #587
kmtang is offline kmtang  Canada
diyAudio Member
 
kmtang's Avatar
 
Join Date: Nov 2004
Location: Vancouver
Default My new 45 oil tanker

My remodeled 45 stereo amp was completed yesterday. The circuit is based on the Sun Audio 2A3 design. I used 6J5 (single triode tube) instead of the 6SN7. Also, I used oil capacitors for the power supply and the cathode bypass of the 45 tube. The capacitors are rahter large in size and mounted underneath of the chasis. They seems like the gas tanks of a big truck.

I am rather surprised that the sound doesn't slow down by the oil capacitors at all. Instead, it sounds very nice to me especially it has lots of dynamic and energy.

73
Johnny
Attached Images
File Type: jpg 45 oil tank.jpg (17.5 KB, 2680 views)
  Reply With Quote
Old 10th May 2005, 02:45 PM   #588
diyAudio Member
 
Join Date: Apr 2005
Location: anglesey
Nice work kmtanq.I'll post a photo of my latest PSE 2A3 direct coupled as soon as I can.
  Reply With Quote
Old 11th May 2005, 07:43 AM   #589
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Nice looking amp... do you have a shot of the underside?

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 11th May 2005, 02:48 PM   #590
kmtang is offline kmtang  Canada
diyAudio Member
 
kmtang's Avatar
 
Join Date: Nov 2004
Location: Vancouver
Default Bottom view of my 45 Oil Tanker

Glad you like my new tanker. This is the 3rd amp I built. I learned from the past experience and just hope to make a better one every time.

Johnny
Attached Images
File Type: jpg bottom view.jpg (7.5 KB, 2528 views)
  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



New To Site? Need Help?

All times are GMT. The time now is 09:00 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