Search found 7 matches

by tlhpsound
Sun Dec 02, 2018 12:53 pm
Forum: JLM Audio Kits
Topic: Regurgitator kit Build Thread
Replies: 105
Views: 112964

Re: Regurgitator kit Build Thread

If I wire a pair of 600 ohm/600 ohm transformers to the outputs of DAC, can I use a log volume pot of 50k or higher? Or I should still use a 5K to 10K pot? I like the effect of the transformer. OK. Thanks. I have another question. I ordered these kits as a make up gain for a stereo volume pot which ...
by tlhpsound
Sun Sep 16, 2018 9:19 pm
Forum: JLM Audio Kits
Topic: Regurgitator kit Build Thread
Replies: 105
Views: 112964

Re: Regurgitator kit Build Thread

What is the purpose of adding mono caps there? As a stereo pair, is not it better that both have caps (or both don't)?
by tlhpsound
Sun Sep 16, 2018 2:32 pm
Forum: JLM Audio Kits
Topic: Regurgitator kit Build Thread
Replies: 105
Views: 112964

Re: Regurgitator kit Build Thread

Hi. I received the second kit. I compared it with the first one and noticed a minor difference. The second one has no beige component parts on Z01 and Z02. The first one does have parts in place. Is it intentional? Or it's an error?
by tlhpsound
Thu Sep 13, 2018 11:51 am
Forum: JLM Audio Kits
Topic: Regurgitator kit Build Thread
Replies: 105
Views: 112964

Re: Regurgitator kit Build Thread

OK. Thank you. One more question, please. What level of max. attenuation do you recommend on the pot? 50 dB is good? The spec of the DAC I am going to use is in the link below.

https://dl.khadas.com/Hardware/ToneBoar ... _Specs.pdf
by tlhpsound
Sat Sep 08, 2018 4:03 pm
Forum: JLM Audio Kits
Topic: Regurgitator kit Build Thread
Replies: 105
Views: 112964

Re: Regurgitator kit Build Thread

OK. Thanks. I have another question. I ordered these kits as a make up gain for a stereo volume pot which I want to place after the DAC module. The application is a DIY car stereo using a Linux chip-on-the-board PC. I do not know the output impedance of the DAC. What would be the optimal impedance o...
by tlhpsound
Sun Aug 26, 2018 2:48 pm
Forum: JLM Audio Kits
Topic: Regurgitator kit Build Thread
Replies: 105
Views: 112964

Re: Regurgitator kit Build Thread

OK. Thanks. I ordered another kit to pair them as stereo. To connect two boards side by side, do I need to connect all pins 1 to 5 of J1 header on one board with the corresponding pins 5 to 1 on J2 on the second?

Can I use OP275? With OP275, what voltage is optimum?
by tlhpsound
Fri Aug 24, 2018 11:54 am
Forum: JLM Audio Kits
Topic: Regurgitator kit Build Thread
Replies: 105
Views: 112964

Powering Regurgitator Kit

Hello

I have very basic questions. How can I power Regurgitator Kit? Should I connect a DC positive, negative and ground to the pin 5, 1 and 4 of the output header? No need to connect pin 1, 4 and 5 of the input header? What are for J1 and J2 Side bar headers?