SSLV1.1 builds & fairy tales

[Salas]

Yes you can. Read the instructions carefully on how to set them for your own needs.

 

[Tix88]

Yes you can. Read the instructions carefully on how to set them for your own needs.

Hello Salas, I read the instructions, but I did not understand how to connect the two pcb to have the two voltages with a single gnd, as regards the components to have the two tensions I have everything in the house, thanks a lot for the help

 

[Salas]

All F0 S0 outputs should go to the load's zero power input. +F +S to load's +V power input. F- S- to load's -V power input.

 

[Tix88]

All F0 S0 outputs should go to the load's zero power input. +F +S to load's +V power input. F- S- to load's -V power input.

Thanks Salas, it was as I thought. One last thing, if I would need two different voltages like + 27v and -9 v, I would have to take two separate transformers for +27 and -9 or just one and reduce the voltage up to -9v?

Thanks

 

[Salas]

You may have higher than needed secondary for one polarity, only penalty is the input Mosfet going to dissipate more due to higher voltage drop across it. In any case you need four wire fully independent secondaries because there are two bridges one in each reg.

 

[wcwc]

Salas,


I still have two set of boards that I haven't built yet. Since I have all the parts needed to build one set of boards, I was planning to build at least one set. I will use the ultrabib boards, that I still need to collect all the parts for, for a future project. So with the extra positive board I was going to use it to power 2 analog crossover boards, the lxmini ones in the DIYaudio store. It requires +24V with 75mA load for each. So would a CCA of 275mA work fine? Would a 2x22VA antek transformer work for this? I have an extra 200VA transformer that I could use (seems a bit large for the load, may get a smaller one to put in the chasis later).

 

[Salas]

Both your CCA and transformer voltage choices are good. To save some dissipation see if the crossovers sound as good with 175mA CCA too. So calculate and have extra current set resistors for testing both CCA levels.

 

[wcwc]

So only 25 mA over the 150 mA load? Don't you normally want around 100mA?

 

[Salas]

Is it about one shared reg or about double mono?

 

[Salas]

For one shared reg use 250mA CCA or bit more

 

[wcwc]

I was going to use the same reg to power both boards. To go double mono I would need some more parts for a matching positive regulator. I could always add it later if there is enough room in the enclosure for the extra regulator.

 

[Salas]

Alright. Good luck with the implementation and let us know the result.

 

[KevinHeem]

I'm using a SSLV1.1 to power a B1 with Korg Triode which draws only 60mA. Using the calculator it looks like 20Ω resistor in the R101/301 position would be appropriate. I don't have a 20Ω on hand, but I do have 10Ω. Is there a disadvantage to using the 10Ω?

 

[Salas]

Only disadvantage will be more heat on the PSU's sinks. High spare current is actually advantageous in this version both technically and subjectively.

 

[KevinHeem]

I have a chassis with a powder coated steel bottom...will this be a problem for sinking?

 

[Salas]

No problem, it will take the heat in this application..

 

[KevinHeem]

After quite some time I'm back to this project. When I put power to the board I get no LEDs lighting up. I put + (long lead) to square pad...is that backward on this board?

 

[Salas]

You put the Leds backwards

 

[KevinHeem]

After installing new LEDs everything seems to work ok. I can adjust voltage with the trim pot. However, after a minute or so of being powered up Q306 gets quite hot and Q301 stays quite cool.

 

[Salas]

If there isn't much Vin-Vout difference Q301 will not heat up much. If Vgs (DC between pins 1-3) is normal like 3-4V the Mosfets should be OK. Those sinks are quite minimal by the way.