it cries for more current
starved
Now I changed to a fixed voltage biasing solution.
Attachments
Are we trying to drive 8 ohms with 2SK170's?
😎
No markup errors, using l CAO VFET.
Circuit diagram see below.
Attachments
Do you have any idea what the cost of these fets will be. That is is it likely to be a 50 cent part or a $50 part .
I have no idea, because VFET is not my production. Could be $ 15? I guess. The answer coming soon.
It looks handsome, have you built it?
😎
Thank you Nelson Pass 😀
I'm not the actual production, just from the principle we discuss what the problem is not.
Because it is a hobby, only can do experiments in the spare time.
The LaoCao devices? I haven't heard. I seem to recall that there is a batch
planned for August.
😎
planned for August.
😎
From what i've read i understand that SIT is the best one can obtain from SS. I have a few questions, if you have the answers please reply here but also by PM because i may forget about the thread , not that i not care but i'm looking into alot of stuff and have a very short memory.
1. Are the SIT the same as JFETS, and which is the best one ?
2. What is the best diy class A design for a SIT amplifier ? If not one, which are the few better ones ? I'd still like to know which is the best 🙂. Not alot of power required, though the more the merrier. I can do with 7 watts if need be.
3. Can i listen in the best quality possible way to large symphic orchestras on a 7w class A SIT amplifier using 99db eff speakers ?
4. Can i construct PASS F1 / F2 with SIT ? I'm looking for the best way to feed some Beyerdynamic DT 880 with 600 OHM impedance, but also some HD650 that i didn't yet purchase.
Please take your time,
Roland
1. Are the SIT the same as JFETS, and which is the best one ?
2. What is the best diy class A design for a SIT amplifier ? If not one, which are the few better ones ? I'd still like to know which is the best 🙂. Not alot of power required, though the more the merrier. I can do with 7 watts if need be.
3. Can i listen in the best quality possible way to large symphic orchestras on a 7w class A SIT amplifier using 99db eff speakers ?
4. Can i construct PASS F1 / F2 with SIT ? I'm looking for the best way to feed some Beyerdynamic DT 880 with 600 OHM impedance, but also some HD650 that i didn't yet purchase.
Please take your time,
Roland
Last edited:
1. Are the SIT the same as JFETS, and which is the best one ?
SITs are a special type of JFET that is more triode-like in its curve,
having what we would call a low Drain impedance.
2. What is the best diy class A design for a SIT amplifier ? If not one,
which are the few better ones ?
Single-ended Class A would play well to the strengths of SITs, but they
can be made to work in most varieties of circuits.
3. Can i listen in the best quality possible way to large symphonic
orchestras on a 7w class A SIT amplifier using 99db eff speakers ?
Yes you can.
4. Can i construct PASS F1 / F2 with SIT ? I'm looking for the best way
to feed some Beyerdynamic DT 880 with 600 OHM impedance, but also
some HD650 that i didn't yet purchase.
Similar to F2 would be my choice.
😎
SITs are a special type of JFET that is more triode-like in its curve,
having what we would call a low Drain impedance.
2. What is the best diy class A design for a SIT amplifier ? If not one,
which are the few better ones ?
Single-ended Class A would play well to the strengths of SITs, but they
can be made to work in most varieties of circuits.
3. Can i listen in the best quality possible way to large symphonic
orchestras on a 7w class A SIT amplifier using 99db eff speakers ?
Yes you can.
4. Can i construct PASS F1 / F2 with SIT ? I'm looking for the best way
to feed some Beyerdynamic DT 880 with 600 OHM impedance, but also
some HD650 that i didn't yet purchase.
Similar to F2 would be my choice.
😎
- Status
- Not open for further replies.
- Home
- Amplifiers
- Pass Labs
- V-FET (SIT) amplifier production