No circuitry on "audiobah" to prevent shut down pop.
Too many reporting issues with Sure3116 to call it well built IMHO
Lots of discussion on this thread and there is larger one one diyaudio. It only takes two weeks to read through all of them if you skim over the stuff you aren't interested in or like me . . . don't understand
Have done that, I am happy to offer my limited perspective.
1) The "red and blue/black" boards offer more opportunities for modding.
2) The "green" audiobah board has some built-in mods, most significantly one that stops speaker "pop" on start up and shut down (an issue with boards listed above). I ordered one 39 days ago and it still has not left China. So expect a long wait.
3) The Sure board is well built and arrived in 10 days. It is plug and play, replete with speaker terminals, power connector (5.5 mm), and RCA inputs. Using the 6n3 tube pre I don't get speaker pop on start up but have a light pop on shut down.
There are other boards available but those are the three most discussed.
This is my first tube preamp, so I have nothing to compare. It is the YuanJing 6N3+6Z4 model. It comes with power transformer and plastic frame that looks OK plus it has volume control that is very useful as the "green" and Sure boards don't have one. One model they offer has a larger plastic frame that also supports the transformer. I had to build an enclosure to house mine.
HTH,
Roger
What are the issues with the Sure3116? I have not heard of anything...
2) The "green" audiobah board has some built-in mods, most significantly one that stops speaker "pop" on start up and shut down (an issue with boards listed above). I ordered one 39 days ago and it still has not left China. So expect a long wait.
HTH,
Roger
The "green" audiobah board has some built-in mods, most significantly one that stops speaker "pop" on start up and shut down (an issue with boards listed above). I ordered one 39 days ago and it still has not left China. So expect a long wait.
I assume you bought it from Ebay and paid with Paypal. I would not pass 45 days to open a case if you feel you need to.
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On both my sure boards the shutdown pop is audible, but at a low level. If I'm repeatedly cycling the power on and off, that's when the pop gets loud. Although it may well be my other amp to.
I just received my Audiobah green board today.
I'm a bit confused about the hookup configuration: Am I assuming correctly that the RCA plug wiring uses a common ground for both L & R channels? I plan to remove the white plug and solder directly to the board.
Yes, you are correct :yes:
I originally assumed the 3-pin connector was for power
The center pin is ground. You can use a male molex connector from a computer fan if you happen to have one. Yuan Jing also sells a set wired with RCA plugs for $1.50. Of course, there is shipping and the wait. Soldering directly is the logical choice but I don't trust my skills on leads that small!
Good luck,
Roger
Yeah...I may have toasted the board already trying to desolder the connector....
I didn't have time to finish the project last night so I won't know til this evening.
Damn! I hope not.
I also read about being careful when mounting the board to metal. Apparently the four mounting holes are not isolated. So mount to nonconducting material, use plastic standoffs, or insert rubber/plastic washers.
Roger