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Salas 23rd August 2018 11:37 PM


Originally Posted by Dadbeh (
negative rail R1 should be 3.3? i thought it was 3.8 for the Soekris dac.

That was an older quote with those handy resistors I had actually used in the experiment. 3.9R rather in the negative.

Salas 24th August 2018 12:50 AM


Originally Posted by spikeyw (
I can make up a 1R83 resistor from my parts bin, I'll try that tomorrow and let you know the outcome. Thanks.

With some spare 10R? 10R//2R2=1.8032R

spikeyw 24th August 2018 11:47 AM

Afraid I only have 10R at 1/4W rating.

Marra 24th August 2018 12:13 PM

2 Attachment(s)
A couple of pics of one of my Ultrabibs set to a smidgeon over 17v after 30mins. It settles at 33C so hopefully will not go much higher when cased up although I think I will add some ventilation to the case.

Salas 24th August 2018 12:20 PM

Its surely nicely cool to start with. Gonna be dual mono? DCG3 promotes dual mono.

Marra 24th August 2018 04:14 PM

Yes dual mono. Replacing bib 1.1's.

Salas 25th August 2018 12:03 AM


Originally Posted by Dadbeh (
thank you salas. i just bought this desoldering station as well but the boards and the components are already ruined


Originally Posted by Dadbeh (
you see the hole for C3 is filled with solder? i set the soldering iron to 825 and still no solder comes out. it is like a rock

Your boards aren't terminally ruined. They look battered by having fought a battle and many holes are filled with RoHS solder BUT there aren't any lifted pads in your photos. Tough as nails. They can be restored with the vacuum gun clearing the holes. Also the cleaning of flux and other residue with isopropyl alcohol will not only help the looks but the rework process too.

Regarding good practice with a vacuum gun so not to clog it up:

-Use the long wire cleaning tools provided before and after each session only when its up to a high set temperature.

-Don't pull the trigger before the gun reaches set temperature. So it will not pull medium hot solder bits already at the nozzle further up the tube where its cooler. They must not get a chance to solidify there before reaching the collection chamber. Cheap stations heat up slowly at power on so have patience.

-Keep on the trigger for little longer after a pad has cleared so all the solder moves up to the chamber, not any last bit to be remaining in the tube.

-The display shows temperature not sensed directly at the nozzle's tip but further up so be generous with the setting. What you see is NOT what you get at the nozzle's tip by enough tolerance (especially true for cheap stations). Its only set ok when it feels ok working with each different board and solder composition.

-Use good quality leaded solder in general. Add some to the unleaded solder filled pads. It will help softening it up for rework.

-Good luck

Salas 25th August 2018 12:23 AM


Originally Posted by Marra (
Yes dual mono. Replacing bib 1.1's.

It will be interesting to know your results with that move on the DCG3

Dadbeh 28th August 2018 11:22 PM

oh my god the desoldering station works beautifully. how did i ever live without it?

Dadbeh 29th August 2018 12:47 AM

is it ok to use 1N4004 in place of the 4 diodes?

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