So in the 56dB case what would be the best choice for this cap value ?
What did you notice in the left corner of the square wave ?
With this pic I remembered my old & first HI-FI Nikko 750-TRM amp when each HiFi wat cost 6€00🙂
The PDF lists 15n1 for the MC, 15n33 for the HMC. I noticed some downwards trend from leading edge to trailing edge on the top one. That shows more HF. It could be more high harmonic level due to high level test signal in combination with the extra gain though.
Connection IRFP9140
Hi, Salas,
is correct this connection:
Drain Q1 to R1
Source Q1 to Drain Q4
Gate Q1 to R2
Regards
Hi, Salas,
is correct this connection:
Drain Q1 to R1
Source Q1 to Drain Q4
Gate Q1 to R2
Regards
Hi Salas,
i have verified the simbol of datashet (IRFP9140) with simbol on your Shunt regulator schematic and i think that the correct connection is:
Drain Q1 to R1
Source Q1 to Drain Q4
Gate Q1 to R2
But i non sure.
Please, can you help?
i have verified the simbol of datashet (IRFP9140) with simbol on your Shunt regulator schematic and i think that the correct connection is:
Drain Q1 to R1
Source Q1 to Drain Q4
Gate Q1 to R2
But i non sure.
Please, can you help?
No, correct are:
Source Q1 to R1
Drain Q1 to source Q4
R2 to gate Q1
IRFP is G,D,S from left to right as you face its front.
Source Q1 to R1
Drain Q1 to source Q4
R2 to gate Q1
IRFP is G,D,S from left to right as you face its front.
Salas, I was hoping you could help me. I have gathered all the parts to build a simplistic phono, but in matching my 2sk170BLs today I have very few between the specified 8-8.5 IDSS. Like some others recently, I can get tight matching in any range from 9.2 to 10.6. There were some circuit modifications posted for using these "hotter" fets, but they all provide more gain than I need; my cartridge is 3.3mv and I use an active pre. I would be very appreciative if you could let me know what circuit modifications I need to make to use my fets, but get around 37-43db of gain. Thanks!
Thanks so much. Here's my closest matches as best as I can measure them: 9.15/9.15
9.35/9.35
10.2/10.2/10.2/10.2
10.35/10.35
9.35/9.35
10.2/10.2/10.2/10.2
10.35/10.35
Subjectively I don't hear very clear the highs so I disconnected the RIAA caps & measured them:
15nF RIAA
Left channel 15.23nF
Right channel 15.24nF
I need to add more capacitance? my specific schematic said 16nF post 2795 page 280
About 47nF RIAA cap what's happen if value it's lower or higher (subjectively speaking)?
15nF RIAA
Left channel 15.23nF
Right channel 15.24nF
I need to add more capacitance? my specific schematic said 16nF post 2795 page 280
About 47nF RIAA cap what's happen if value it's lower or higher (subjectively speaking)?
The lower the more HF. Your's I don't have it in my files any more unfortunately, but I think you may just have enough mid bass and not insufficient HF in the system. Can you listen with 46K (92K//92K) instead of 47K?