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Re: Regurgitator kit Build Thread

Posted: Tue May 19, 2020 1:09 pm
by Joe Malone
survivorsound wrote:
Tue May 19, 2020 11:52 am
Thanks 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?
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 runs

Re: Regurgitator kit Build Thread

Posted: Fri Sep 18, 2020 6:24 am
by survivorsound
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?

Re: Regurgitator kit Build Thread

Posted: Fri Sep 18, 2020 9:37 am
by Joe Malone
survivorsound wrote:
Fri Sep 18, 2020 6:24 am
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?
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.

Re: Regurgitator kit Build Thread

Posted: Tue Dec 08, 2020 10:15 pm
by pillepalle123
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

Re: Regurgitator kit Build Thread

Posted: Wed Dec 09, 2020 7:41 pm
by Joe Malone
pillepalle123 wrote:
Tue Dec 08, 2020 10:15 pm
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
Regurgitator is -3dB @ 2Hz into a 10k load and basically flat at 20Hz so fine for subwoofer use

Re: Regurgitator kit Build Thread

Posted: Tue Dec 15, 2020 1:43 pm
by HiFIMatt
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.

Re: Regurgitator kit Build Thread

Posted: Tue Dec 15, 2020 3:56 pm
by Joe Malone
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?
Just wire to the +in and wire -in to 0v for unbalanced input to regurg pcb.
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!
Yes wire your dual rail +/-12v to +/-18vdc to the +/-V and 0v.
Finally I wanted to check if there was any other resistor setting etc that I should check if I want "line level" balanced output.
Set output level trimpot to give you the balanced output level you want into your amp. Done.

Re: Regurgitator kit Build Thread

Posted: Wed Dec 16, 2020 10:31 am
by HiFIMatt
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.

Re: Regurgitator kit Build Thread

Posted: Wed Dec 16, 2020 1:49 pm
by Joe Malone
HiFIMatt wrote:
Wed Dec 16, 2020 10:31 am
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. REGURG WIRING.JPG
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.

Re: Regurgitator kit Build Thread

Posted: Thu Dec 17, 2020 10:20 am
by HiFIMatt
Thanks Joe!!!
Have a merry CHristmas and safe and happy holidays. :D