I have several sets that are just over 9, will these still work in this circuit? ( Just in case I need another one!
Russellc
Russellc
@Russellc
that's covered in post #8
that's covered in post #8
Lazy ZM, forgot to measure Rout/DF ..... but - who cares; see at FW site and slide down (no output cap)
gain is ~ 1V34pp to 8Vpp, meaning ~0V5rms for 1W@8R .......... call it 15.5db
some notes I made:
Jun 2024 schm; my setting Iq 1A8 all cases
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
2SJ74BL Idss 6.5mA
IRFP
drain resistor 680R + 500R trimpot; 680R fixed increased with 330R fixed (fast, instead of changing trimpot for 1K)
Ugs 3V54
U(680+330)=2V65 so I= 2.62mA...
gain is ~ 1V34pp to 8Vpp, meaning ~0V5rms for 1W@8R .......... call it 15.5db
some notes I made:
Jun 2024 schm; my setting Iq 1A8 all cases
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
2SJ74BL Idss 6.5mA
IRFP
drain resistor 680R + 500R trimpot; 680R fixed increased with 330R fixed (fast, instead of changing trimpot for 1K)
Ugs 3V54
U(680+330)=2V65 so I= 2.62mA...
I wonder if I will regret not having this one 🤔
If I review my power JFET hoarding…I already have built F2J and a pair of Babelfish 2J…I stuck some unmatched Semisouth down in ACAs too.
I still have boards and parts to build LuDEF and the Jeff Young long board versions of J2 and F3
Once I turn my attention to bigger SIT amps I don’t know if I’ll turn back
Everything is about getting my act together with speaker projects right now
I just don’t want to be an irresponsible greedy boy 🤣
Anyone want to comment on what might set this one apart from what I already built or have to build?
If I review my power JFET hoarding…I already have built F2J and a pair of Babelfish 2J…I stuck some unmatched Semisouth down in ACAs too.
I still have boards and parts to build LuDEF and the Jeff Young long board versions of J2 and F3
Once I turn my attention to bigger SIT amps I don’t know if I’ll turn back
Everything is about getting my act together with speaker projects right now
I just don’t want to be an irresponsible greedy boy 🤣
Anyone want to comment on what might set this one apart from what I already built or have to build?
I can't help you with comment .......... biased heavily
except, you know that all my amps are the same ........
except, you know that all my amps are the same ........
