Posted on Sunday, 25th October 2009 by Auw Jimmy

I’m the middle of laziness… Actually I want to finish my Gainclone LM1875 project, but it will consume a lot of my brainpower But I don’t want to waste this weekend doing nothing. So I just test my Mini Regulator for my TentLabs XO2 Reclock Module.

Luckily, I still have old transformer, rated around 1A with 15 VAC output (tested around 15.3 VAC).

I connect the Mini Regulator to the transformer and check the VDC output. The green LED lit means everything is OK The VDC measured around 11.83 VDC. A little bit lower than my expected 12 VDC output but this should be fine. I will try with higher transformer later (16-18 VAC).

Tags: power supply, regulator
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Posted on Sunday, 21st June 2009 by Auw Jimmy

Although Guido from TentLabs said his XO2 Reclock Module already equipped with “enough” power supply filtering, but I insist to use extra regulator. Double filtering should be better than one (I hope so).

So here is a regulator module from Taiwan.

The PCB is called Mini Regulator. I bought it from a person named Coffin in DIYAudio.com. Nice built PCB, double layer with good layout.

I have free time this afternoon, so I decide to solder it with some components from my drawer. The first is the diodes. I use Vishay Telefunken SF5407 as primary rectification part.

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Tags: regulator
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Posted on Sunday, 29th June 2008 by Auw Jimmy

Due to parts shortage on some components, I can’t complete the assembly of my DIY project. So I just write down the idea on my scratch book. Here is the plan.

For the filament/heater supply, I plan to use LT1083 regulator. It is a good regulator for audio compared with the LM (78xx) or LM 3xx series. The first capacitor should be NOS Elna Silmic 2200uF (should be 4 or 5 in parallel). Then, a 1 Ohm/10W resistor should be place in series. Then another parallel filter with BlackGate F Series 680uF. At the end, LT1083 will do the final regulation to provide exact 6-6.3 VDC (depends on my divider resistor).

I use dual mono design for filament and also dual mono for high tension (B+). For each channel, I need around 1.6 Ampere filament power. I use custom power transformer rated at 7.5 VAC and 3 Ampere.

For high tension B+ voltage. I will have two versions.

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Tags: B+ supply, DIY-Audio, heater supply, power supply, regulator, transformer, tube
Posted in DIY Audio, Personal | Comments (2)