Experiences with TJ Mesh Plate DHT's - 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 27th February 2006, 12:44 AM   #1
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Default Experiences with TJ Mesh Plate DHT's

I am thinking of springing for a pair of 2A3 mesh plates in the near future as my new dc coupled 2A3 amplifier is now operating and with some component replacements will be finished soon.

I am interested in comments from people who are using or have used tubes by this manufacturer.

I am also interested in comments on the 45 and 300B mesh plates as I have amps that can use these as well.

The online tour of the factory hosted by diyHifi looks pretty impressive.
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 27th February 2006, 01:27 AM   #2
andrei is offline andrei  Canada
diyAudio Member
 
Join Date: Dec 2002
Location: Canada
I have been using a pair of TJ's mesh plate 300B tubes for three years now, so they probably are up to a few thousand hours run-time by now. I like them...
  Reply With Quote
Old 27th February 2006, 03:37 AM   #3
ALBQ is offline ALBQ  United States
diyAudio Member
 
Join Date: Dec 2003
Location: Albuquerque
Default TJ 2A3

Hello,
Using TJ (Sofia) Meshplate 2A3's for last couple years in my amp. Very happy with them
Cheers -ALBQ
  Reply With Quote
Old 27th February 2006, 06:42 AM   #4
arnoldc is offline arnoldc  Philippines
diyAudio Member
 
Join Date: Apr 2003
Location: Makati
Send a message via Yahoo to arnoldc
hi kevin, i've had a chance to put in a TJ Mesh on my 2A3 and didn't like them. They sounded slow- not to my liking. Seems to lack the grunt and snap I am looking for. I'm better off with Sovtek 2A3 for that matter. i am now using a bi-plate RCA 2A3 I got as NNB (NOS No Box ) for PhP7,000 here in the Philippines. It has the speed, grunt and snap but with smoother presentation.

(my music is from classical to heavy metal)
  Reply With Quote
Old 27th February 2006, 08:49 AM   #5
diyAudio Member
 
Join Date: Sep 2003
I have the Yamamoto A-08 45 SET, and I have been testing with following three tube sets the last year:

NOS RCA 45
TJ Mesh 45
EML Solid Plate 45


The EML Solid Plate 45 betters the two other in nearly every respect. Less hum, more defined low end and better transparency. The TJs sound too lush for my liking. I also get a smidgen more hum with the TJs. These are my findings when used in the A-08. You might get other results in in another amp, but I suspect that the sonic signature of the tubes would still be there.
__________________
Thanx!
  Reply With Quote
Old 27th February 2006, 07:40 PM   #6
diyAudio Member
 
Join Date: Oct 2003
Location: norman ok
Hey KEvin K: I've been using a pair of TJ meshplate 2A3s in my bottlehead paramours for about 1.5 years now. I love them and they've been extremely reliable. I have the opposite experience from Arnold, to my ears the TJs are well worth the price differential over the sovteks (shrill and harsh) or the valve arts (slow and soupy).

best, Kevin G
__________________
"Give me the Luxuries of life & I will gladly live without the Necessities" (Frank Lloyd Wright)
  Reply With Quote
Old 28th February 2006, 02:11 AM   #7
diyAudio Member
 
Join Date: Dec 2003
Location: Denver, CO
I was pretty much settled on the TJ's until I picked up a pair of Shuagang 2A3C's. Stuck them in to make sure they worked, and never looked back. I've accumulated RCA's, TJ's, Valve Arts, Canadian Marconis and Raytheons - but the 2A3C's just never seem to come back out of the circuit for very long. Not considering that they are priced comparable to a Valve Art (i.e they're inexpensive for a 2A3), I just really enjoy them in my Paramours.
  Reply With Quote
Old 28th February 2006, 03:14 AM   #8
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Hi Guys,
Thanks for the many responses, I suspect I will be trying several, but both the EML and TJ sound interesting.

Despite starting the thread and choosing the title I was wondering whether anyone has tried the new JJ 2A3?

Comments on other types you have tried particularly in comparison to the TJ would be worthwhile..

I am currently using the Sovtek 2A3 in my new amplifier which is still waiting for its infusion of shizuki motor run ppio cathode bypass and power suply caps.

The highs are a little hashy which I associate with the electrolytic cathode bypass caps. or possibly the output tubes..

The driver stage is a direct coupled srpp using 7N7, eventually this will become a choke loaded mu-follower using exo-01 from MQ.

It's a really simple amplifier, and the performance except for the top octave is really surprisingly good with the Sovtek 2A3. Bass is very authoritative, mids well balanced, highs are not that great, but overall it is quick and detailed. I am sure a better output tube once the other changes are in place will be a worthwhile investment.
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 28th February 2006, 05:38 PM   #9
diyAudio Member
 
Join Date: Oct 2003
Location: norman ok
Hi Cantskienuf:

are these the tubes you are talking about?

http://www.supertnt.com/default/product2a3-c.asp

are they electrically equivalent to regular 2a3 tubes? same heater voltage and recommended operating points? I'd be curious to try them in my paramours.

Kevin
__________________
"Give me the Luxuries of life & I will gladly live without the Necessities" (Frank Lloyd Wright)
  Reply With Quote
Old 28th February 2006, 07:02 PM   #10
diyAudio Member
 
Join Date: Dec 2003
Location: Denver, CO
Quote:
are these the tubes you are talking about?
That's them. Same heater voltage. I haven't seen curves, but suspect from performance that op points are in line with Paramour design parameters. I spoke to Brian Cherry for a moment about them at RMAF this year and he seemed to favor them quite a bit also. I haven't found a U.S. source, so SuperTNT seems to be the only game for acquiring them.
  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
Screen Mode Mesh Plate? jlsem Tubes / Valves 5 1st July 2009 04:46 AM
mesh plate el34 (supereTNT) dubdub Tubes / Valves 6 9th June 2008 05:18 AM
Emission Labs 300B Mesh plate 56oval Tubes / Valves 3 27th September 2007 12:07 PM
Tianjin 300B mesh plate Mohan Varkey Tubes / Valves 1 30th March 2003 07:08 PM
300B mesh plate, 2,5 Volt Heater reinhard Tubes / Valves 6 2nd September 2002 01:54 PM


New To Site? Need Help?

All times are GMT. The time now is 09:25 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