Hafler 9303 and Transnova - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 9th July 2006, 10:51 PM   #1
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Default Hafler 9303 and Transnova

Comments?
I'm interested in difference comparing to "regular" amps,so asking is good enough ,for start ...
__________________
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 9th July 2006, 11:48 PM   #2
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi choky,
I heard a Transnova not to long ago. A very odd sounding amlifier. I can't put my finger on it, but I didn't like it at all. It's a very simple, all mosfet design. It's still here, but I don't really want to listen to it again.

Sorry it's not the critique you were looking for, but there is my impression.

-Chris
  Reply With Quote
Old 10th July 2006, 12:31 AM   #3
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 anatech
Hi choky,
I heard a Transnova not to long ago. A very odd sounding amlifier. I can't put my finger on it, but I didn't like it at all. It's a very simple, all mosfet design. It's still here, but I don't really want to listen to it again.

Sorry it's not the critique you were looking for, but there is my impression.

-Chris

no need for sorry;
one of this dayz I'll have opportunity to hear 9303 replica (don't know it's possible to steal,borrow or rape for schmtc)....
I dunno nothing about transnova except what I can see in patent and 915 schematic floating on the net....

can you define "odd sounding"?

I have few leftover pairs of 135 and 50s ,waiting for something small and portable (knowing me-portable will never happen ).....INPUT AND DRIVER STAGE OF THESE TRANSNOVA AMPS LOOK INTERESTING (lol-caps lock) if not from other reason ,then for eeeny weenny +/-24V supply...
mebbe I'm just foolin' around-but,hey,this board is exactly made for that
__________________
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 10th July 2006, 12:40 AM   #4
diyAudio Member
 
Join Date: Aug 2002
Location: Toronto, Canada
Choky,

I have the schematics for the 9300 somewhere.
Not sure how different it is from the 9303, but
if you're interested, I'll dig it up and scan it for you.

Cheers,
Dennis
  Reply With Quote
Old 10th July 2006, 01:09 AM   #5
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 Dennis Hui
Choky,

I have the schematics for the 9300 somewhere.
Not sure how different it is from the 9303, but
if you're interested, I'll dig it up and scan it for you.

Cheers,
Dennis

tnx for offer ;
I'll be glad to see that schmtc.
just take your time and scan it when you can
__________________
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 10th July 2006, 05:13 PM   #6
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi choky,
Man, I'd have to listen to it again! I do remember it wasn't very realistic.

The best way to describe it was that it sounded odd. (not in a good way).

-Chris
  Reply With Quote
Old 10th July 2006, 06:39 PM   #7
diyAudio Member
 
Join Date: Aug 2004
Location: Illinois
Anatech,

FWIW, I had an Acoustat TNT-200 amp back in the 80s that I used for several years with a pair of Acoustat IIa speakers. It sounded good with these electrostatic panels. But, when I used it on a pair of PolyNatalia 3-way speakers with regular dynamic drivers, I did NOT like its sound.

Hard to describe, but this amp seemed to add something to the sound. It was like it had some built in reverberation. Not an echo but a type of ambience that was not in the recorded material. This effect was noticed only on dynamic drivers but not on the electrostatic Acoustat panels.

Hmm. Maybe it would sound OK with open backed dipoles but not with direct radiating drivers?

This amp was designed by Strickland, the same guy who designed the Transnova amp. Maybe you heard what I heard.
  Reply With Quote
Old 10th July 2006, 06:48 PM   #8
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi Dick,
I'll agree with your observations. I can't put my finger on teh sound, but it was weird. Just "off" sounding. I've never heard aything like it.

It is the TNT-200 I was listening to. Really odd sound on dynamic speakers.

Mind you, I'm not a Maggie fan at all. Possibly it's in that same direction.

-Chris
  Reply With Quote
Old 10th July 2006, 09:28 PM   #9
diyAudio Member
 
Join Date: Aug 2004
Location: Illinois
Anatech,

A very hi-end EE I have corresponded with uses the TNT-200 for subs, nothing else.

Now that I think about my experience I want to add that the TNT sound was overly dramatic. Transients and gradations between ppp and fff seemed over done. It was like the amp was also functioning somewhat as an expander.

I think its sound was tricked out to enhance reproduction from the Acoustat speakers. This could be a legitimate design goal but perhaps it should have been stated to protect unwary users from applying it to other uses. But, this is just speculation. I know I sold my TNT-200 and never want another........
  Reply With Quote
Old 10th July 2006, 09:43 PM   #10
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
Quote:
Originally posted by anatech
I can't put my finger on teh sound, but it was weird. Just "off" sounding. I've never heard aything like it.
IMHO, it's a fine circuit, but the one I played with did not appear
to have much bias on the output stage, and I speculate that
more bias and heat sinking would have improved it greatly.
  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
Transnova Circuit east electronics Solid State 26 18th September 2008 08:40 PM
What to do with Hafler XL-280? JWK Solid State 3 1st May 2008 04:51 PM
simple transnova project? rotation Solid State 3 30th January 2006 10:57 AM
fs hafler p 230 $100 soulsheiksan Swap Meet 1 4th January 2006 02:31 AM
hafler amp or pre-amp larryg Solid State 2 9th March 2004 10:39 PM


New To Site? Need Help?

All times are GMT. The time now is 11:18 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