STOXX - I have done as you suggested.
I find the "schematic" you so generously supplied has some different values than the standard.
You have different values of capacitors for C1 and C2. I am not familiar enough with TSpice to know if this is a balanced or single ended input - for all I know it is single ended and difference in the caps means nothing like it would with a balanced input. My assumption since I do not know.
I can run a frequency sweep and it looks like one would expect a filter to look like with C1 and C2 at 0.01uF.
How does one find out if this has problems? Sorry to be so helpless but I have no idea how to verify if this is OK or bad.
Could you direct me to where I can find out more about this?
THANKS and take care,
I find the "schematic" you so generously supplied has some different values than the standard.
You have different values of capacitors for C1 and C2. I am not familiar enough with TSpice to know if this is a balanced or single ended input - for all I know it is single ended and difference in the caps means nothing like it would with a balanced input. My assumption since I do not know.
I can run a frequency sweep and it looks like one would expect a filter to look like with C1 and C2 at 0.01uF.
How does one find out if this has problems? Sorry to be so helpless but I have no idea how to verify if this is OK or bad.
Could you direct me to where I can find out more about this?
THANKS and take care,
Hi Rick,
The DIY FE input may be single ended or balanced. When C2 is grounded the input is single ended. For balanced input, In+ is at C1 and In- is at C2.
When changing the high pass frequency both C1 and C2 should be changed, and they should both be the same value, regardless of whether you are using single ended or balanced input.
Note that the ratio of R3/R1 and R4/R2 is the gain ratio. R2 and R4 are also part of the high pass filter so any change to R2 and R4 will have an effect on the high pass frequency.
The DIY FE input may be single ended or balanced. When C2 is grounded the input is single ended. For balanced input, In+ is at C1 and In- is at C2.
When changing the high pass frequency both C1 and C2 should be changed, and they should both be the same value, regardless of whether you are using single ended or balanced input.
Note that the ratio of R3/R1 and R4/R2 is the gain ratio. R2 and R4 are also part of the high pass filter so any change to R2 and R4 will have an effect on the high pass frequency.
I am also interested to use this FE with DIY Biamp 6-24 active crossover but I cannot figure out on how to connect them to the same power supply. The issue is the common GND point. The DIY biamp needs single 24V PSU with a virtual GND at 12V but the DIY FE 2022 is using dual 24V PSU with the GND at 0V. Can I use them together with one power supply?
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Hello dansa69,
the FE2022 can also run from a single-ended powersupply (+24 V DC - GND) as well the 6-24 AXO uses a single ended supply.
The FE2022 (power input) would be connected like:
V+ to PSU +24 V
VG not connected (virtual ground - made by R11//C4 and R12//C5)
V- to PSU ground
Nothing else should be connected to VG (FE2022) - it will run anywhere around +12 V DC!
Cheers
Dirk
the FE2022 can also run from a single-ended powersupply (+24 V DC - GND) as well the 6-24 AXO uses a single ended supply.
The FE2022 (power input) would be connected like:
V+ to PSU +24 V
VG not connected (virtual ground - made by R11//C4 and R12//C5)
V- to PSU ground
Nothing else should be connected to VG (FE2022) - it will run anywhere around +12 V DC!
Cheers
Dirk
