Thank you very much.
To reduce this effect I will use silver plated wiring, I hope this solution will help me to reduce it.
To reduce this effect I will use silver plated wiring, I hope this solution will help me to reduce it.
Just posting to say how very nice sounding the Ubib 1.3's are with the Soekris dam2941. Thanks Salas and also euro21 for your suggestions.
I used Vishay MRS series for R1 and also replaced Vrr with a fixed resistor.
I recently purchased a WiiM Pro for streaming and using its digital coax to connect to the dam2941. Sounded a tad thin with the stock supplied SMPS travel charger 5v 2A with USB C connector to Wiim Pro streaming Tidal Connect. I tried a Lenovo laptop charger 65w and was pleasantly rewarded with a much fuller sound. Salas which of your PSU designs might help here?
Thanks. Nash
I used Vishay MRS series for R1 and also replaced Vrr with a fixed resistor.
I recently purchased a WiiM Pro for streaming and using its digital coax to connect to the dam2941. Sounded a tad thin with the stock supplied SMPS travel charger 5v 2A with USB C connector to Wiim Pro streaming Tidal Connect. I tried a Lenovo laptop charger 65w and was pleasantly rewarded with a much fuller sound. Salas which of your PSU designs might help here?
Thanks. Nash
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Hi, well done with your 2941. Nice to know it sounds good to you with UltraBiB 1.3. As linear alternative to SMPS adapter there's my L-Adapter PSU design.
Hi. Ive recently built two ubibs1.3 on official boards with standard Tea-bag supplied kit parts. It is configured 4.75V and ~130ma. It powers analog section of my r2r dac (ladder) which consumes ~30ma per side (one ps for each channel). All works fine and stable. One remark - heatsinks are barely warm.
Previously i have used Paul Hynes PR3 powers supplies for this purpose.
Sound observations: increase of resolution, sound energy and increase of voices sibilance (T's and S'es are more pronounsed). Last part about sibilance bothers me. Though i love increase of nuance i hear in my music. So i wondering if i could tweak my ubibs?
Maybe anyone has suggestions what could be done?
Thanks in advance.
Previously i have used Paul Hynes PR3 powers supplies for this purpose.
Sound observations: increase of resolution, sound energy and increase of voices sibilance (T's and S'es are more pronounsed). Last part about sibilance bothers me. Though i love increase of nuance i hear in my music. So i wondering if i could tweak my ubibs?
Maybe anyone has suggestions what could be done?
Thanks in advance.
You could evaluate subjective synergy of: a. Increase standing current since its barely warm. b. Bypass C2 with a small MKP underneath. c. Increase C2 value.
0.1uF MKP bypass, 1000uF C2. Evaluate in steps. Like do step (a), listen, is it enough? If not, add step (b) and so on and so forth.
Did it:
Input DC = 8V
R1 = 3
R8 = 5.6K
M1 = IRF9610 (instead of FQP3P20)
M2 = IRL530 (instead of IRF530 )
Red LED = 1 (instead of 2)
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Ultrabib = 3.8V, 100mA
Ultrabib off:
Ultrabib ON:
Very seldom spikes, but all seems good. Test something else or all perfect and Ultrabib could work with 3.8V ?
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It looks very stable. Certainly fit for use. Those seldom little bursts seem like sporadic common mode noise interference.
1us scan rate is fast so those are very high frequency noise bursts. Check at 100us too.
Use naked probe nose with its short ground collar wire accessory in case you are using the hook and the crock wire. Because it is long, has more inductance and wider loop area picking RF.
1us scan rate is fast so those are very high frequency noise bursts. Check at 100us too.
Use naked probe nose with its short ground collar wire accessory in case you are using the hook and the crock wire. Because it is long, has more inductance and wider loop area picking RF.
Hi,
I have a problem on the negative side of the circuit. As soon as I turn on the power, small clicks appear and the printed circuit heats up at D4, you can see it in the photo, it becomes translucent.
My system must provide an analog output ian canada, the normal one, not the pro one, in 12v in 500ma, my transformer supplies in 16/0/16 and others in 9v (if it is important) and it does 80 va.
So I don't know if it's a connection error on my part, I'm not sure that's it but you can tell me, on the diagram that I made these are the 2 ways that I tried.
I had tested before without any load and I had no problems and the voltage was stable.
I also wanted to specify that the other loads of the transformer are not connected but are secure.
I have a problem on the negative side of the circuit. As soon as I turn on the power, small clicks appear and the printed circuit heats up at D4, you can see it in the photo, it becomes translucent.
My system must provide an analog output ian canada, the normal one, not the pro one, in 12v in 500ma, my transformer supplies in 16/0/16 and others in 9v (if it is important) and it does 80 va.
So I don't know if it's a connection error on my part, I'm not sure that's it but you can tell me, on the diagram that I made these are the 2 ways that I tried.
I had tested before without any load and I had no problems and the voltage was stable.
I also wanted to specify that the other loads of the transformer are not connected but are secure.
