Yes just send me a email and I will send you a copy of the schematic. The LME49720 is just better at driving longer cable runssurvivorsound wrote: ↑Tue May 19, 2020 11:52 amThanks Joe! Are you able to share the schematic, or otherwise recommend what you’d try in terms of signal path with the LM4562/LME49720 in there?
Regurgitator kit Build Thread
Moderator: Joe Malone
- Joe Malone
- Site Admin
- Posts: 2081
- Joined: Wed Jan 24, 2007 11:35 pm
- Location: Brisbane, Australia
- Contact:
Re: Regurgitator kit Build Thread
Joe ![Smile :-)](./images/smilies/icon_smile.gif)
JLM Audio
Capturing Audio without Injury
![Smile :-)](./images/smilies/icon_smile.gif)
JLM Audio
Capturing Audio without Injury
-
- Posts: 6
- Joined: Thu May 30, 2019 7:50 pm
Re: Regurgitator kit Build Thread
Driving an unbalanced load, do you leave pin 3 disconnected and the gain range shifts down by 6dB?
If pin 3 is grounded at the load (to keep the gain range the same), does it stress the inverting amp by forcing it to drive 51 ohms, or does that pressure get relieved through the gain trim somehow?
If pin 3 is grounded at the load (to keep the gain range the same), does it stress the inverting amp by forcing it to drive 51 ohms, or does that pressure get relieved through the gain trim somehow?
- Joe Malone
- Site Admin
- Posts: 2081
- Joined: Wed Jan 24, 2007 11:35 pm
- Location: Brisbane, Australia
- Contact:
Re: Regurgitator kit Build Thread
Yes leave pin 3 open as shorting it will just waste a lot of current for no reason. The opamp will current limit into the 51ohm which is fine but it will make more heat and stress on the opamp.survivorsound wrote: ↑Fri Sep 18, 2020 6:24 amDriving an unbalanced load, do you leave pin 3 disconnected and the gain range shifts down by 6dB?
If pin 3 is grounded at the load (to keep the gain range the same), does it stress the inverting amp by forcing it to drive 51 ohms, or does that pressure get relieved through the gain trim somehow?
Joe ![Smile :-)](./images/smilies/icon_smile.gif)
JLM Audio
Capturing Audio without Injury
![Smile :-)](./images/smilies/icon_smile.gif)
JLM Audio
Capturing Audio without Injury
-
- Posts: 1
- Joined: Wed Nov 25, 2020 3:43 am
Re: Regurgitator kit Build Thread
Hi,
how is the frequency response of the regurgitator?
I want to use it for Subwoofer duty and need a flat response at least down to 20hz.
Thanks in advance!
Regards,
Chris
how is the frequency response of the regurgitator?
I want to use it for Subwoofer duty and need a flat response at least down to 20hz.
Thanks in advance!
Regards,
Chris
- Joe Malone
- Site Admin
- Posts: 2081
- Joined: Wed Jan 24, 2007 11:35 pm
- Location: Brisbane, Australia
- Contact:
Re: Regurgitator kit Build Thread
Regurgitator is -3dB @ 2Hz into a 10k load and basically flat at 20Hz so fine for subwoofer usepillepalle123 wrote: ↑Tue Dec 08, 2020 10:15 pmHi,
how is the frequency response of the regurgitator?
I want to use it for Subwoofer duty and need a flat response at least down to 20hz.
Thanks in advance!
Regards,
Chris
Joe ![Smile :-)](./images/smilies/icon_smile.gif)
JLM Audio
Capturing Audio without Injury
![Smile :-)](./images/smilies/icon_smile.gif)
JLM Audio
Capturing Audio without Injury
Re: Regurgitator kit Build Thread
Hi everyone,
I am intending to use 2 x regug' to convert single ended line level (from phone preamp to balanced line level for my power amp.
I have looked at this tread but cannot see any mention of what PCB pads you wire for single ended input. I have the balanced output all sorted.
Can someone offer a suggestion please? Also I am using a dual rail PS and presume you wire to V+, V- and 0V where ever convenient. If that's not the case let me know! Finally I wanted to check if there was any other resistor setting etc that I should check if I want "line level" balanced output.
- Joe Malone
- Site Admin
- Posts: 2081
- Joined: Wed Jan 24, 2007 11:35 pm
- Location: Brisbane, Australia
- Contact:
Re: Regurgitator kit Build Thread
Just wire to the +in and wire -in to 0v for unbalanced input to regurg pcb.Hi everyone,
I am intending to use 2 x regug' to convert single ended line level (from phone preamp to balanced line level for my power amp.
I have looked at this tread but cannot see any mention of what PCB pads you wire for single ended input. I have the balanced output all sorted.
Can someone offer a suggestion please?
Yes wire your dual rail +/-12v to +/-18vdc to the +/-V and 0v.Also I am using a dual rail PS and presume you wire to V+, V- and 0V where ever convenient. If that's not the case let me know!
Set output level trimpot to give you the balanced output level you want into your amp. Done.Finally I wanted to check if there was any other resistor setting etc that I should check if I want "line level" balanced output.
Joe ![Smile :-)](./images/smilies/icon_smile.gif)
JLM Audio
Capturing Audio without Injury
![Smile :-)](./images/smilies/icon_smile.gif)
JLM Audio
Capturing Audio without Injury
Re: Regurgitator kit Build Thread
Thanks for the prompt response - much appreciated.
I just wanted to check the "GND" = "0V" because I understand they can be different things at times.
I have a quick pic attached just to confirm my understanding.
I am using an AMB dual rail power supply connected by a 3 core shielded cable. I was intending to earth the shield and connect that to the case to earth it.
I just wanted to check the "GND" = "0V" because I understand they can be different things at times.
I have a quick pic attached just to confirm my understanding.
I am using an AMB dual rail power supply connected by a 3 core shielded cable. I was intending to earth the shield and connect that to the case to earth it.
- Joe Malone
- Site Admin
- Posts: 2081
- Joined: Wed Jan 24, 2007 11:35 pm
- Location: Brisbane, Australia
- Contact:
Re: Regurgitator kit Build Thread
Link -in to 0v as shown in the fixed diagram by the red line. The shield from the unbalanced in and 0v are then wired together as they should be.HiFIMatt wrote: ↑Wed Dec 16, 2020 10:31 amThanks for the prompt response - much appreciated.
I just wanted to check the "GND" = "0V" because I understand they can be different things at times.
I have a quick pic attached just to confirm my understanding.
I am using an AMB dual rail power supply connected by a 3 core shielded cable. I was intending to earth the shield and connect that to the case to earth it. REGURG WIRING.JPG
You do not have the required permissions to view the files attached to this post.
Joe ![Smile :-)](./images/smilies/icon_smile.gif)
JLM Audio
Capturing Audio without Injury
![Smile :-)](./images/smilies/icon_smile.gif)
JLM Audio
Capturing Audio without Injury
Re: Regurgitator kit Build Thread
Thanks Joe!!!
Have a merry CHristmas and safe and happy holidays.![Very Happy :D](./images/smilies/icon_biggrin.gif)
Have a merry CHristmas and safe and happy holidays.
![Very Happy :D](./images/smilies/icon_biggrin.gif)
-
- Posts: 7
- Joined: Fri Aug 12, 2022 3:57 pm
Re: Regurgitator kit Build Thread
Joe,
Wanted to see if it's possible to run a Reurgitator off of a +48V rail...
can I simply up the x4 electrolytic caps from 25v to 35V rating and then increase the Zener size in Zd1/Zd2? Or will that also cook the chip?
I'm using the NE5532...
Thanks Joe. You and your company are the best.
Wanted to see if it's possible to run a Reurgitator off of a +48V rail...
can I simply up the x4 electrolytic caps from 25v to 35V rating and then increase the Zener size in Zd1/Zd2? Or will that also cook the chip?
I'm using the NE5532...
Thanks Joe. You and your company are the best.
- Joe Malone
- Site Admin
- Posts: 2081
- Joined: Wed Jan 24, 2007 11:35 pm
- Location: Brisbane, Australia
- Contact:
Re: Regurgitator kit Build Thread
No that will blow up the opamp.TheFrozenone wrote: ↑Mon Aug 15, 2022 2:56 pmJoe,
Wanted to see if it's possible to run a Reurgitator off of a +48V rail...
can I simply up the x4 electrolytic caps from 25v to 35V rating and then increase the Zener size in Zd1/Zd2? Or will that also cook the chip?
I'm using the NE5532...
Thanks Joe. You and your company are the best.
You can fit 2 x 18v 1w zener diodes and add 220R in series with +V and -V to a floating 48v supply as long as it isn't being used for anything else. This will drop the 48v floating rail down to 36v and make the +/-18v needed for the NE5532A
Joe ![Smile :-)](./images/smilies/icon_smile.gif)
JLM Audio
Capturing Audio without Injury
![Smile :-)](./images/smilies/icon_smile.gif)
JLM Audio
Capturing Audio without Injury
-
- Posts: 7
- Joined: Fri Aug 12, 2022 3:57 pm
Re: Regurgitator kit Build Thread
Hmm....No way to do it with a single +48v rail? Chip change?
Perhaps I should just T-rex it down to 36v?
Perhaps I should just T-rex it down to 36v?
- Joe Malone
- Site Admin
- Posts: 2081
- Joined: Wed Jan 24, 2007 11:35 pm
- Location: Brisbane, Australia
- Contact:
Re: Regurgitator kit Build Thread
The regurgitator needs +/-V. So if you send it a floating 36v power you still need to fit 2 x 18vdc 1watt zeners.TheFrozenone wrote: ↑Mon Aug 15, 2022 3:37 pmHmm....No way to do it with a single +48v rail? Chip change?
Perhaps I should just T-rex it down to 36v?
If you had some old OPA2604A you could use a floating 48v power supply if you fitted 2 x 24v 1w zeners to make +/-24v
You cannot use a single power rail that is connected to 0v ever.
Joe ![Smile :-)](./images/smilies/icon_smile.gif)
JLM Audio
Capturing Audio without Injury
![Smile :-)](./images/smilies/icon_smile.gif)
JLM Audio
Capturing Audio without Injury
Re: Regurgitator kit Build Thread
Would the NE5532a be the opamp of choice if you were to make a single +24V out circuit?
and if you were daisy chaining 4 boards together via J1+J2 would the 12v zeners on the other 3 boards be replaced by 1uf mono caps?
What would the 2x 10r need to be for that set up?
and if you were daisy chaining 4 boards together via J1+J2 would the 12v zeners on the other 3 boards be replaced by 1uf mono caps?
What would the 2x 10r need to be for that set up?