non pedal HPF

[swarfrat]

Entirely possible I screwed something up, but the schematic confirms my guestimate FX loop 100 ohm source impedance, 10k input impedance.

title Fixed 72Hz T HPF in PF-500 FX loop
* file name hpf-t-loop.cir
V1 in 0 dc 0 ac 1
R1 in 1 100
C1 1 2 470n
R2 2 0 4.7k
C2 2 out 470n
R3 out 0 10k

.control
option rshunt=1g
ac oct 20 10 20k
plot vdb(out)
.endc

 

[PhatBottomBass1]

Probably not your thing, but it could potentially fit under your amp. Still need 9v. When I found out that Dusty Hill (ZZ Top) always used the Micro THUMPINATOR (sfx = UK). I decided to try it. I like it.

I actually have it wired after the Ashmaker then into the BASSRIG. There is an Eventide PowerMax under the board. So I attached it to the BASSRIG with 3M Industrial Velcro and low profile EBS Flat Gold Patch cables.

Good luck...

 

[Riff Ranger]

If you don’t find a good non-pedal solution, maybe a pedal hooked up like this would work for you.

 

[agedhorse]

1st and 2nd Order Passive RC High Pass Filter Circuit Design

Video on the subject :


Passive 2nd order HPF exist, why would they not work for our applications?
@mmbongo posted a device that seem to implement such filter.

I think you will find that without buffering the second RC section, you will end up pretty close to 6dB/octave and a low Q.

I can see it causing loading issues with a passive bass ! Could be wrong

You are correct IME.

There has been some discussion of the USB outlet on some Mesa Subway series amps having enough juice t9 power a pedal. At least everything would be in back.

Yes, this is correct.

Entirely possible I screwed something up, but the schematic confirms my guestimate FX loop 100 ohm source impedance, 10k input impedance.

title Fixed 72Hz T HPF in PF-500 FX loop
* file name hpf-t-loop.cir
V1 in 0 dc 0 ac 1
R1 in 1 100
C1 1 2 470n
R2 2 0 4.7k
C2 2 out 470n
R3 out 0 10k

.control
option rshunt=1g
ac oct 20 10 20k
plot vdb(out)
.endc
View attachment 4798261

Looking at the plot, the first 2 octaves show ~6dB/octave.