Toshiba 2SJ74GR / 2SK170GR
Hello everyone.
I have two pairs of Toshiba 2SJ74GR / 2SK170GR Matched lost in the box, I can use it to build an F4 Amp. or have to be BL grade.
P. Dias
Hello everyone.
I have two pairs of Toshiba 2SJ74GR / 2SK170GR Matched lost in the box, I can use it to build an F4 Amp. or have to be BL grade.
P. Dias
Thank you ZM.
What are the resistances that you speak, are the 0.47 R -3W ?. Don't tell anyone that I asked this, I have an F5 running for 3 years and I don't understand much of it, but I know how to weld well.
We’re always trying different things, it’s addictive.
P. Dias
What are the resistances that you speak, are the 0.47 R -3W ?. Don't tell anyone that I asked this, I have an F5 running for 3 years and I don't understand much of it, but I know how to weld well.
We’re always trying different things, it’s addictive.
P. Dias
ref. to sch in post #3 , make R3 and R4 0R , both
dunno which exact schematic you're using , but you'll manage
dunno which exact schematic you're using , but you'll manage
ZM, those are the resistors for degeneration right?
If I got it right from NP’s latest BA talk.
Do you have a rough rule of thumb for a good matching level between Jfets for taking out 22.1 Ohm source resistors?
Thanks
Thanks ZM.
Thanks ZM.
I'm a big idiot, as you see I need help with these details.
I also have a pair of BL-grade jfet here, I'm trying to save it for a preamp. BA3., I don't know if I do well.
P. Dias
Thanks ZM.
I'm a big idiot, as you see I need help with these details.
I also have a pair of BL-grade jfet here, I'm trying to save it for a preamp. BA3., I don't know if I do well.
P. Dias
Impossible.
I traveled all the way to USA half around the bloody planet landed in San Francisco, and didn't even know BAF was on till I caught another bloody plane to the east coast.
That is bloody dumb.
Would have been my first time too, but no, the lack of brain cells got in the way.
I traveled all the way to USA half around the bloody planet landed in San Francisco, and didn't even know BAF was on till I caught another bloody plane to the east coast.
That is bloody dumb.
Would have been my first time too, but no, the lack of brain cells got in the way.
F4 bi-amping w/ flea watt & passive XO
One F4 stereo to drive a 2 Eminence Beta 15 A per channel.
One F4 stereo to drive one TB W8-1808 per channel.
First speaker build.
XO currently at 200Hz / -12dB using miniDSP w/ 2x4HD1 plugin. I would like to spend a couple of weeks playing between 100Hz and 550Hz XO before decision. The problem is I don't have a matching voltage gain stage, so it's not really possible. I'm using a 125w (4 ohm) class AB amp for the woofers to get by.
Take this route, or no?
Cheers!
One F4 stereo to drive a 2 Eminence Beta 15 A per channel.
One F4 stereo to drive one TB W8-1808 per channel.
First speaker build.
XO currently at 200Hz / -12dB using miniDSP w/ 2x4HD1 plugin. I would like to spend a couple of weeks playing between 100Hz and 550Hz XO before decision. The problem is I don't have a matching voltage gain stage, so it's not really possible. I'm using a 125w (4 ohm) class AB amp for the woofers to get by.
Take this route, or no?
Cheers!
Attachments
I know I'll go to hell for asking, but is there a BOM for that or B5, etc?
Same goes for the previous, I haven't built a speaker other than stuff I carried back as a kid on my bicycle from Radio Shack on multiple trips and got away with building something better than what I had without even knowing what a XO was (and didn't kill an amp).
There are a few resources like that.
At work now.
I'll help later if no one else has chimed in
At work now.
I'll help later if no one else has chimed in
I would think that “very soon” might may perhaps possibly mean “this year sometime if everything works out.”