Nobu Shishido's 805 SET interstage

TugaTweaker · 11th May 2007, 12:02 AM

Is the Wavac 805 project possible without the specially wounded Tango # 10672 ? Can i use a normal wounded, but a lot bigger one or Lundahls 1660 ? Anyone succeded without the Tangos ?

M Adao

Shoog · 11th May 2007, 02:51 PM

I have used toroidal power transformers as interstage transformers, but it brings issues and the result is compromised over what can be achieved with the more expensive proper interstage transformers.
Their expensive for a reason and you get what you pay for.

Shoog

AndreasS · 11th May 2007, 03:57 PM

The grid current of the output tube demands an interstage transformer with low resistance an leakage inductance.

Andreas

TugaTweaker · 11th May 2007, 09:39 PM

Thank you dear friends for the feedback . My first project was an
Hiraga KT88SE , i am improving it since 1998 until today and i am
proud for the achievment ,and i will do the same with this project.
I spent 648 euros , all transformers custom wounded , included the black magic interstage . I am a believer ... Us (Not USA) or China's ready 805 SET power ... for €1000 ... what will be better ?

Regards

Martinho Adao

schiller · 12th May 2007, 02:09 PM

Quote:

Originally posted by TugaTweaker
Is the Wavac 805 project possible without the specially wounded Tango # 10672 ? Can i use a normal wounded, but a lot bigger one or Lundahls 1660 ? Anyone succeded without the Tangos ?

M Adao

If your trans has no issues in the highs (early roll off, in-band resonances) wenn connected with the secondary in reverse polarity w.r.t. the primary and has sufficient primary inductance (mind. 35H), go for it.

Greetings
Konstantinos

EDIT: By the way, what is the black magic interstage?

TugaTweaker · 12th May 2007, 06:21 PM

Quote:

By the way, what is the black magic interstage?

I would " " the black magic , i meant the special wound of the Tango IS #10672 . Thank you Schiller for your reply . Thats what the craftman said to me too . As long as the IS can keep bandwith ,and he says it will ... let me see ... hope he is right .
He told me to use a russian 6H30 instead of a WE-437A , the straight equivalence is a 6H45 , for those knowing the schematic , what do you think ?

Shoog · 12th May 2007, 08:40 PM

Can't find any data on the WE 437,
I do know that the 6h30 is probably the most serious driver triode availble. A single valve will provide enough for a stereo amp Its equivalent to a 5687 with both triodes parallelled, which I am currently using as my interstage transformer driver.
I have absolutely no doubt that it will be more than up to the job - though it is expensive.

Shoog

coresta · 12th May 2007, 08:50 PM

Hi , Shishido used 6l6 trioded as driver in the WAVAC , cheaper , beefier than the unaffordable 437A as input tube . The 417A 5842 would be here a good sub

i'll use a 307A trioded to drive a pair of 100TH in A2 . cheers

Shoog · 12th May 2007, 08:59 PM

If the 417A is up to it then the 6h30 would be. Gain might be your only issue.

Shoog

TugaTweaker · 12th May 2007, 09:11 PM

Hi Coresta . 6h30 instead of a WE-437A input tube as is the schematic . The 6L6 as driver shoud be kept or maybe i will use kt66 instead . Interesting 100TH , never heard of it .

Wish I could :
http://www.jogis-roehrenbude.de/Lese.../805-Story.htm

11th May 2007, 09:39 PM	#4
TugaTweaker diyAudio Member Join Date: Jun 2003 Location: Portugal	nobu Thank you dear friends for the feedback . My first project was an Hiraga KT88SE , i am improving it since 1998 until today and i am proud for the achievment ,and i will do the same with this project. I spent 648 euros , all transformers custom wounded , included the black magic interstage . I am a believer ... Us (Not USA) or China's ready 805 SET power ... for €1000 ... what will be better ? Regards Martinho Adao

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
45 -> 813 Interstage	Steven-H	Tubes / Valves	34	3rd February 2008 04:39 PM
Interstage X-former identification	Klimon	Tubes / Valves	0	14th October 2007 08:29 PM
Wim's hybrid interstage amp	DG	Solid State	4	10th October 2007 08:49 PM
Help about SHISHIDO Pre Phono	Maurizio	Analogue Source	1	9th May 2005 12:22 PM
4K:10K interstage	astouffer	Tubes / Valves	0	24th March 2005 04:34 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read

11th May 2007, 12:02 AM	#1
TugaTweaker diyAudio Member Join Date: Jun 2003 Location: Portugal	Nobu Shishido's 805 SET interstage Is the Wavac 805 project possible without the specially wounded Tango # 10672 ? Can i use a normal wounded, but a lot bigger one or Lundahls 1660 ? Anyone succeded without the Tangos ? M Adao

11th May 2007, 02:51 PM	#2
Shoog diyAudio Member Join Date: Aug 2002 Location: Eire	I have used toroidal power transformers as interstage transformers, but it brings issues and the result is compromised over what can be achieved with the more expensive proper interstage transformers. Their expensive for a reason and you get what you pay for. Shoog

11th May 2007, 03:57 PM	#3
AndreasS diyAudio Member Join Date: May 2005 Location: near Duesseldorf	The grid current of the output tube demands an interstage transformer with low resistance an leakage inductance. Andreas

12th May 2007, 08:40 PM	#7
Shoog diyAudio Member Join Date: Aug 2002 Location: Eire	Can't find any data on the WE 437, I do know that the 6h30 is probably the most serious driver triode availble. A single valve will provide enough for a stereo amp Its equivalent to a 5687 with both triodes parallelled, which I am currently using as my interstage transformer driver. I have absolutely no doubt that it will be more than up to the job - though it is expensive. Shoog

12th May 2007, 08:50 PM	#8
coresta diyAudio Member Join Date: Mar 2005 Location: Paris	Hi , Shishido used 6l6 trioded as driver in the WAVAC , cheaper , beefier than the unaffordable 437A as input tube . The 417A 5842 would be here a good sub i'll use a 307A trioded to drive a pair of 100TH in A2 . cheers

12th May 2007, 08:59 PM	#9
Shoog diyAudio Member Join Date: Aug 2002 Location: Eire	If the 417A is up to it then the 6h30 would be. Gain might be your only issue. Shoog

12th May 2007, 09:11 PM	#10
TugaTweaker diyAudio Member Join Date: Jun 2003 Location: Portugal	Hi Coresta . 6h30 instead of a WE-437A input tube as is the schematic . The 6L6 as driver shoud be kept or maybe i will use kt66 instead . Interesting 100TH , never heard of it . Wish I could : http://www.jogis-roehrenbude.de/Lese.../805-Story.htm

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)