SSLV1.1 builds & fairy tales

[merlin el mago]

OK I will add more CCS. Now time to listen if it's OK with the added resistor.

 

[Salas]

Why don't you use the 5687 series mode 12.6V filaments at 450mA by the way? To set CCS at 650mA and avoid some regulator heat. Because not having an appropriate voltage transformer in hand?

 

[merlin el mago]

Works OK with the added resistor.

 

[Salas]

The R303 for more Vref voltage you mean?

 

[merlin el mago]

Yes 220 Ohm R303

 

[chromenuts]

Hi Salas

I’m in the process of repurposing a SSLV Bib V1.1 that I assembled with your help recently.

I want to use the SSLV power supply that is set to produce 5V to power two different boards in my DAC project. The D3 DAC board requires a +5V supply as does the I2S to Simultaneous board.

I’m pretty sure this SSLV is already set to produce enough current for both boards. I will be re-checking my notes and measuring it before use.

My question is how should I wire the SSLV to the power inputs on both boards if I want to maintain the 4 wire sensing feature (assuming that is possible and I’m not required to use a 2 wire connection).

Do I have to run 4 wires to each board in parallel back to the SSLV board?...or can I jump from one board to the next in series?

Thanks in advance for any guidance.

 

[Salas]

Hi

You could bridge the + and 0 power input nodes across the two boards with thick copper bars or thick wires and solder the incoming force and sense wires at the middle of the power sharing bars.

 

[chromenuts]

Thanks for the lightning fast response!


You mean like this...right?

 

[Salas]

Yes

 

[chromenuts]

Thanks👍

 

[merlin el mago]

Salas to reduce CCS have I to increase or decrease the resistance? If I remember well less resistance more CCS, right?

TIA

 

[Salas]

To reduce current you increase resistance

 

[merlin el mago]

Thanks Salas.

 

[Salas]

Don't thank me, thank Mr. Georg Simon Ohm

 

[merlin el mago]

Thank you Mr. Ohm

 

[merlin el mago]

Salas the reg. for 6,3V heaters is damaged, the voltage is jumping always.

 

[Salas]

Did it heat too much?

 

[merlin el mago]

Not, have a big heatsink.

 

[merlin el mago]

Now Vout is fixed 7,2V

 

[Salas]

Hmm... Check the BC transistors Vbe first. If any abnormal like much different than 0.5V-0.7V should be dead.