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 24th September 2012, 11:29 AM   #1
MGH is offline MGH  United States
diyAudio Member
 
Join Date: Jul 2004
Location: Texas
Default Anyone heard of radiometal for transformer core?

I was on the AudioNote site and read that they use radiometal core in their top transformers. According to them, it's 55% nickel core that has been "treated" (bombarded) with some unnamed radioisotope. This process is suppose to increase the sensitivity of the transformer to low level signal. Is this just marketing BS or has some scientific or measurable validity? Anyone know where to get it?

Audio Note
  Reply With Quote
Old 24th September 2012, 12:59 PM   #2
TheGimp is offline TheGimp  United States
diyAudio Member
 
TheGimp's Avatar
 
Join Date: Aug 2009
Location: Johnson City, TN
Nickel core laminates are normally better. However with regards to the treatment, without specific details citing references for the process and effect, I'd say "snake oil".
  Reply With Quote
Old 24th September 2012, 01:42 PM   #3
expert in tautology
diyAudio Member
 
bear's Avatar
 
Join Date: Apr 2002
Location: New York State USA
The alloy is undoubtedly melted down early minted US Nickels and old Atwater Kent radio chassis...

Sorry, could not resist...

_-_-bear
__________________
_-_-bear
http://www.bearlabs.com -- Btw, I don't actually know anything, FYI -- [...2SJ74 Toshiba bogus asian parts - beware! ]
  Reply With Quote
Old 24th September 2012, 02:01 PM   #4
diyAudio Member
 
Join Date: Aug 2008
Radiometal is a product of ED Fagan Inc, manufacturer of special purpose alloys.
45% Nickel-iron alloy, close by its properties to high-flux permalloy (Bmax = 1.6T).

Nothing special, just another high quality soft-magnetic material.
  Reply With Quote
Old 24th September 2012, 02:17 PM   #5
MGH is offline MGH  United States
diyAudio Member
 
Join Date: Jul 2004
Location: Texas
I guess it's another classic AudioNote marketing snake oil claim to sell their transformers at exorbitant price. Instead of the standard 45% radiometal, they got 55% with "special 12 step process" that dramatically improves the sound quality.

Who is a reputable manufacturer of nickel cores? Can't trust the Chinese stuff.
  Reply With Quote
Old 24th September 2012, 03:02 PM   #6
Yvesm is offline Yvesm  France
diyAudio Member
 
Yvesm's Avatar
 
Join Date: Jul 2004
Location: Ardeche
Found in RDH4 :
Attached Files
File Type: pdf RDH4onRadiometal.pdf (57.8 KB, 112 views)
  Reply With Quote
Old 24th September 2012, 03:25 PM   #7
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
AudioNote said:
Quote:
The difference between the 50% and the 55% is not subtle either, although I have to say that unless the rest of the circuit is maxed out with the best possible parts and the amplifier is used in a system with complimentary equipment, it may not be as obvious.
That sounds like a standard audiophool snake-oil cop-out clause. Rough translation: if you can't hear the difference then it means that your equipment is not good enough, not that our magic does not work.
  Reply With Quote
Old 24th September 2012, 03:39 PM   #8
diyAudio Member
 
Join Date: Aug 2008
AudioNote transformer's aren't bad by any means, they are just overpriced, and represent no technical wonder whatsoever.
  Reply With Quote
Old 24th September 2012, 04:22 PM   #9
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
It is sad that someone with a good product can't just sell it on the basis of it being a good well-engineered product, with 'this' and 'that' genuine feature. I blame it all on the lack of proper science education in our schools, but that is another topic!
  Reply With Quote
Old 24th September 2012, 05:54 PM   #10
12E1 is offline 12E1  United Kingdom
diyAudio Member
 
12E1's Avatar
 
Join Date: May 2012
Location: Near Huntingdon, Cambridgeshire, UK
Quote:
Originally Posted by DF96 View Post
I blame it all on the lack of proper science education in our schools, but that is another topic!
...Aided and abetted by the so called Discovery Channel. It's a prime source of incorrect science and mismatched terminologies (power, voltage and current apparently being interchangeable in some programmes)
  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
Where you buy iron transformer core for DIY audio transformer tarsik Tubes / Valves 10 27th December 2011 08:15 PM
need help with transformer core sss Power Supplies 11 7th November 2006 12:40 PM
Transformer efficiency - Z-11,H-14, c-core, r-core , toroidal flyboi Parts 23 4th May 2006 01:03 PM
Any website reference for diy choke ,siliver R-core, C-core, EI and power transformer bmpa Parts 2 22nd April 2004 04:15 AM
R Core Transformer john-china Pass Labs 0 10th July 2003 02:34 AM


New To Site? Need Help?

All times are GMT. The time now is 03:13 AM.


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