Flashing EL34 - Page 2 - 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 28th June 2004, 09:37 AM   #11
karma is offline karma  Canada
diyAudio Member
 
karma's Avatar
 
Join Date: Feb 2003
Location: hamilton,ontario
ok here's one with the light on working on a power supply
for the filament

there new out of the box

gas? i have just a little
Attached Images
File Type: jpg mvc_732f.jpg (32.1 KB, 386 views)
  Reply With Quote
Old 28th June 2004, 11:30 AM   #12
diyAudio Member
 
electropt's Avatar
 
Join Date: Jun 2004
Location: Lisboa
Hi,

The tubes I have right now are Ei Yugo, they are not very well rated... The amp I have them on is a Jadis Orchestra, my first and last comertial tube amp, the next one will be DIY

The SED EL34 and some other are for sale at eBay, I got my matched quads for US$58.90 including shipping for anywere in the world from this auction here but not the gold pin ones...

Here is a pic of my quite nice sounding amp:

Click the image to open in full size.

The rest of the system: Monitor Audio Studio 6, AMC CDM7 (CDP with CDM4 transport and modular output modules), Rega Planet 3, Rega Eos phono stage, Straight Wire Maestro ICs, and Cable Talk 3.1 speaker cable (to be upgraded SOON!).
  Reply With Quote
Old 28th June 2004, 11:37 AM   #13
diyAudio Member
 
Tube_Dude's Avatar
 
Join Date: Mar 2002
Location: Aveiro-Portugal
Olá electropt!

Have you remarked ,that the Jadis Orchestra has a transistor gain stage at the input and if you take it out of circuit the sound become much better.

The Jadis Orchestra is in fact a hibrid amp...

Um abraço
__________________
Jorge
  Reply With Quote
Old 28th June 2004, 12:26 PM   #14
diyAudio Member
 
electropt's Avatar
 
Join Date: Jun 2004
Location: Lisboa
Caro Jorge,

Obrigado pela dica, tenho de ver essa situacao. Ja teve a oportunidade de comprovar o efeito antes/depois?

Cumprimentos,

Hugo

---------------------------------------------------------------------------

Dear Jorge,

Thanks for your tip, I have to take a look at it. Have you had the oportunity to hear the result of such mod?

Best regards,

Hugo
  Reply With Quote
Old 28th June 2004, 12:30 PM   #15
diyAudio Member
 
Tube_Dude's Avatar
 
Join Date: Mar 2002
Location: Aveiro-Portugal
Quote:
Originally posted by electropt


Dear Jorge,

Thanks for your tip, I have to take a look at it. Have you had the oportunity to hear the result of such mod?

Yes...i have one of this babys. The sound inproved a lot.
Specially the perceived dinamic range.

Um abraço

PS: Se quiseres contacta-me por mail.
__________________
Jorge
  Reply With Quote
Old 28th June 2004, 12:40 PM   #16
diyAudio Member
 
electropt's Avatar
 
Join Date: Jun 2004
Location: Lisboa
Quote:
Originally posted by karma
my amp did the same thing. cheaper to replace the quad
than to leave it like i did. 2 weeks ago my amp finally died. only would have cost me $60 for new tubes now its $200 for part's and tube's

you shoulds see it when it really short's

could this happen it could or maybe not see pic
Hi,

It is comforting to know that the two pairs of power tubes are protected from arcing or over-bias operation by two .315mA fuses mounted inside the chassis.
  Reply With Quote
Old 30th June 2004, 12:40 AM   #17
diyAudio Member
 
electropt's Avatar
 
Join Date: Jun 2004
Location: Lisboa
Dear Sir,
Thank you for your interest in our products.
The Orchestra is a hibrid. The preamp part is solid state.
Cordially,
Jadis
----- Original Message -----
From: Electro PT
To: jadis@jadis-electronics.com
Sent: Tuesday, June 29, 2004 2:49 AM
Subject: Jadis Orchestra


Dear Sirs,

Could you please tell me if the Jadis Orchestra integrated amplifier is a hibrid or all tube?

Thanks in advance.

Kind regards,

Hugo




Shame on Jadis!!!

I never read in the catalog that it was a hibrid... Jadis is no more!

Bahhhhhhhhhh
  Reply With Quote
Old 30th June 2004, 12:54 AM   #18
karma is offline karma  Canada
diyAudio Member
 
karma's Avatar
 
Join Date: Feb 2003
Location: hamilton,ontario
ahh u still got a nice amp just mod it
  Reply With Quote
Old 30th June 2004, 10:40 AM   #19
diyAudio Senior Member
 
fdegrove's Avatar
 
Join Date: Aug 2002
Location: Belgium
Hi,

Quote:
I never read in the catalog that it was a hibrid... Jadis is no more!
Hybrid?
I don't think so....Unless they changed it recently all the JA Orchestras I've seen so far had no semi-conductors in the direct signal path whatsoever.

The way it is setup is 1/2 12AX7A as a voltage amp, followed by the other 1/2 12AX7A as a phasesplitter/driver for the PP EL34 or KT90s for the Reference models.

BTW, as it is fully P2P wired except for some parts of the PS, tracing the signal path is pretty straightforward.

Cheers,
__________________
Frank
  Reply With Quote
Old 30th June 2004, 11:23 AM   #20
diyAudio Member
 
electropt's Avatar
 
Join Date: Jun 2004
Location: Lisboa
Quote:
Originally posted by fdegrove
Hi,



Hybrid?
I don't think so....Unless they changed it recently all the JA Orchestras I've seen so far had no semi-conductors in the direct signal path whatsoever.

Fdegrove, unfortunatly for me, you are wrong. In the PCB where you have the volume and balance blue Alps pots you also have two 2N1711 transistors in the signal path as Tube_Dude said.

Click the image to open in full size.

And I guess the actual production units still are hibrid based on the repply I got from Jadis. Mine was from early 1998 (SN: 0770).



Quote:
Originally posted by fdegrove


The way it is setup is 1/2 12AX7A as a voltage amp, followed by the other 1/2 12AX7A as a phasesplitter/driver for the PP EL34 or KT90s for the Reference models.

BTW, as it is fully P2P wired except for some parts of the PS, tracing the signal path is pretty straightforward.


It has a very nice P2P construction and simple wire scheme.

Click the image to open in full size.

Click the image to open in full size.

It has PCBs in the HV power supply in the source selector and in the volume/balance/input gain stage.

I guess its almost a Jadis

Cheers,

Hugo

PS. The lousy pictures were made with a crapy CMOS camera, please take that into consideration. Or else you can give me a new good one
  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
tube is flashing and glowing very bright! pho_boi Tubes / Valves 8 9th February 2006 09:16 PM
7591s flashing on start-up? mr mojo Tubes / Valves 8 11th October 2005 08:33 PM
Tube flashing safetyman Tubes / Valves 15 7th September 2005 02:26 PM
Flashing light in time to the music? SkinnyBoy Music 6 10th February 2003 09:42 PM
how? --> making a flashing led multiplexor Parts 31 19th January 2003 12:33 PM


New To Site? Need Help?

All times are GMT. The time now is 09:32 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