Parts for 8audio EL34 Jadis JA30 build

[Eli Duttman]

I will look into El Cheapo Grande. Is there a specific thread i should look into?

Search the archives both here at DIY Audio and over at Audio Asylum. The concept is discussed in several threads.

Not that long ago, I worked with a DIY member from Hungary on an "El Cheapo Grande" build. He too was/is financially constrained. IIRC, he is using Hammond O/P "iron", as 1 means of cost control. I suggest you try digging that thread up 1st.

 

[RobFreak]

Search the archives both here at DIY Audio and over at Audio Asylum. The concept is discussed in several threads.

Not that long ago, I worked with a DIY member from Hungary on an "El Cheapo Grande" build. He too was/is financially constrained. IIRC, he is using Hammond O/P "iron", as 1 means of cost control. I suggest you try digging that thread up 1st.

I fell across this: http://www.mcshanedesign.net/elcheapo.htm

And this: http://www.diyaudio.com/forums/tubes-valves/108399-up-date-el-cheapo-schematic-2.html

I assume the drawing you made is something i should focus on?! ;-)

 

[Eli Duttman]

The original "El Cheapo", as shown in the schematic, uses "12" W. O/P tubes that are members of the 6V6 "clan". With good O/P "iron", a UL wired "El Cheap" yields approx. 12 WPC. A drawn, the schematic calls for guitar amp O/P "iron" and is triode wired to yield approx. 6 WPC.

An important characteristic of the "19" W. 7591 family is that small signal circuitry that works with "12" W. tubes (EL84, 6V6, ...) also works with the 7591, etc. Several manufacturers of note: Fisher, Sherwood, Scott, ... took full advantage of that fact. "El Cheapo Grande" follows the trail they blazed, by mating the 12AT7/ECC81 splitter/driver to 7591 O/P tubes.

Wade through this long thread and get a good feel for what an "El Cheapo Grande" project entails. Dig deeper, both here and over on AA, and you'll come up with more info.

 

[RobFreak]

The original "El Cheapo", as shown in the schematic, uses "12" W. O/P tubes that are members of the 6V6 "clan". With good O/P "iron", a UL wired "El Cheap" yields approx. 12 WPC. A drawn, the schematic calls for guitar amp O/P "iron" and is triode wired to yield approx. 6 WPC.

An important characteristic of the "19" W. 7591 family is that small signal circuitry that works with "12" W. tubes (EL84, 6V6, ...) also works with the 7591, etc. Several manufacturers of note: Fisher, Sherwood, Scott, ... took full advantage of that fact. "El Cheapo Grande" follows the trail they blazed, by mating the 12AT7/ECC81 splitter/driver to 7591 O/P tubes.

Wade through this long thread and get a good feel for what an "El Cheapo Grande" project entails. Dig deeper, both here and over on AA, and you'll come up with more info.

Wow! There is no lack of information. I will have to look through.. Exciting stuff! 🙂)

 

[tomashans]

Hi guys

I have one project of jadis JA30 monoblock same use EL34 !
But i want use KT-88 or KT-120 instead EL34 .

That is my transform paremetr :

X2

a) 380V-**350V**-0-**350V**-55V-380V
250mA

b),12V/ 0.3A

c), 5V/ 4A

d), 15V/ 3A

e), 6.3V/ 5A

f), 6.3/ 2A

My ouput choke is lundhal :
2769

My filter choke 2x:
Hammond 193K 2.6H/300mA


Can help me with resistor or parts same i must changhe ?


Taht is my schematic rectifier . but my rectifire use GZ34 tube

my power schmatic

Many thanks

Sorry for my english