All wooded construction. Walnut front, 18mm ply sides, 5mm ply back panel. Ventilated metal top still to come. Will have a matching 180w hifimediy bass amp and B1.miniDSP pre amp soon
Volume control is inside as this will be a power amp for hi effeciency 109db/w/m horns and need some gain adjustment but wanted to keep the front clean.
heatsinks upwards causes no issues
still have the damn turn off thump
Volume control is inside as this will be a power amp for hi effeciency 109db/w/m horns and need some gain adjustment but wanted to keep the front clean.
heatsinks upwards causes no issues
still have the damn turn off thump
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While waiting for more boards, I made some of my own.
The toner transfer isn't going well for me yet so I carved some with a dremel by hand,
looks like the work of Fred Flinstone...but it works. I really want a CNC for this.
Mouser is out of the 2sk170 Toshiba's and in the F5 thread Mr Pass said the Fairchild J111 could be used.
http://www.diyaudio.com/forums/pass-labs/121228-f5-power-amplifier-1285.html#post3340644
Is there something I have to change for it to work?
The pinout is different but I have accounted for that.
It could be something with my boards that I don't see, haven't found yet but the last set worked fine.
I ran out of the 170"s so purchased 50 of the J111's
The ACA makes a great little headphone amp, all my friends like the sound of it, the F5 is better though.
Thank you
The toner transfer isn't going well for me yet so I carved some with a dremel by hand,
looks like the work of Fred Flinstone...but it works. I really want a CNC for this.
Mouser is out of the 2sk170 Toshiba's and in the F5 thread Mr Pass said the Fairchild J111 could be used.
http://www.diyaudio.com/forums/pass-labs/121228-f5-power-amplifier-1285.html#post3340644
Is there something I have to change for it to work?
The pinout is different but I have accounted for that.
It could be something with my boards that I don't see, haven't found yet but the last set worked fine.
I ran out of the 170"s so purchased 50 of the J111's
The ACA makes a great little headphone amp, all my friends like the sound of it, the F5 is better though.
Thank you
JFET Substitutions?
I'm finally ready to stuff the boards I got for Christmas but I've run into a snag with the input JFETs.
I've seen only the above two recommendations for subs for the 2SK170.
Can we get a list going of known acceptable substitutes?
What are the critical specs for this part in this location?
I'm finally ready to stuff the boards I got for Christmas but I've run into a snag with the input JFETs.
I've seen only the above two recommendations for subs for the 2SK170.
Can we get a list going of known acceptable substitutes?
What are the critical specs for this part in this location?
Order genuine ones here FET Audio | Hi-End Audio Projects Spencer is a member of this forum.
Well buying from overseas is one option....
Another is to use what I have:
MPF102 with Idss= 2 - 20mA
MPF4392 with Idss = 25 - 75mA
J201 with Idss = .1 - 1mA
Or if these don't work go with the recommended part:
2SK170 with Idss = 2.6 - 20mA
Or the F5 substitute:
J111 with Idss = 20mA
Based on Idss it looks like Loudthud's recommendation is the best choice but what other specs should I look at to compare?
Another is to use what I have:
MPF102 with Idss= 2 - 20mA
MPF4392 with Idss = 25 - 75mA
J201 with Idss = .1 - 1mA
Or if these don't work go with the recommended part:
2SK170 with Idss = 2.6 - 20mA
Or the F5 substitute:
J111 with Idss = 20mA
Based on Idss it looks like Loudthud's recommendation is the best choice but what other specs should I look at to compare?