The simplistic Salas low voltage shunt regulator

[50AE]

I prefer keeping the caps values. I use a switch right now.

The sound compared to before:

I let the DAC burn in to let things get better hopefully. For now it sounds smooth, but too polite, boring, uninteresting as it was before. Maybe the Silmics 2 play part in this too, because they are this kind of capacitors.

 

[Salas]

Try Zobel termination with film cap first. Also Nichicon Muse at a point.

 

[king4joy]

With helps from Salas, I am using the SSLV 1.1 to filament bias my 26 line amp (DN2540 CCS loaded and telfon cap output).

The board is super stable in this application.
Heat from semi's manageable, quite a lot of heat from the rectifiers though, will try to move the rectifiers to the PSU box to share some heat there.

This 26 amp is super quiet!!!
Soundstage of this 26 amp is super wide, but not much depth though, and the separation of instruments is not super. The vocal (especially female vocal) from my 10 line amp is still more super than this 26 yet.

Salas....do you think changing any of the caps on the board....or any other modification on the board would improve the performance please??

Cheers,

King

Any suggestions to improve the performance of this amp with the SSLV1.1 board in this application will be most welcome and will be tried in the very near future.
(please PM me if you think the suggestion may be out of topic here)

Photos show 1) the pair of board inside the 26 amp, and 2) the 26 amp at my friend's place.

Thankyou Salas.

 

[Salas]

You can listen with electrolytic 470uF instead of little MKT (using C101 instead of C102) in the filament regulators. But try other #26 tubes at a point too.

 

[king4joy]

470uF rated at 35V ok??
I shall try....and report back.....it may take some time though to get my amp back....and it is Chinese New Year here next week.....

 

[Salas]

Even less than 35V is OK for your application, but the higher DCV spec it fits the available space, the better the parameters in a cap of same type.

 

[king4joy]

What about C103.....I am using C104 at the moment.....do you think better to use electrolytic here as well ??

Thanks.

 

[Salas]

Not for start, one at a time.

 

[king4joy]

Good.....tks.

 

[king4joy]

That should be the way....thankyou for reminding......

You are the man...mate...

😀

 

[SonocusEric]

hello, question about trimmer bypass capacitor that's specified as 220-1000uf... i try 10'000 uf, the voltage up is very slow- takes minutes to come up to the desired voltage, hehe. sound has way bigger staging and dynamic, but seem 'slow'. does that bypass cap affect transient? please know me the knowledge. thank you 😀

http://www.diyaudio.com/forums/powe...-voltage-shunt-regulator-120.html#post1941348

c1 in this circuit.

 

[Salas]

Yes it does effect the voltage reference characteristics

 

[wineds]

Probably should do more reading but if someone could tell me where to find a BOM and preferably a build guide for this version :

http://www.diyaudio.com/forums/atta...tage-shunt-regulator-salas-symetric-5v-2-.jpg

Looking to make a +/-5V regulator @ 100ma running off 12V or 7V AC CT transformer. It needs to be a significant upgrade on a 7805/7905.

 

[Salas]

Can't make out the linked picture. Tiny.

 

[Salas]

Make sslv1.1 bib or some of its predecessors (bit worse) but give at least 7VDC Vin-Vout drop.

 

[wineds]

Make sslv1.1 bib or some of its predecessors (bit worse) but give at least 7VDC Vin-Vout drop.

Sorry here it is from post xxx. Thanks Salas. I will do more research on sslv1.1 bib.

 

[wineds]

Make sslv1.1 bib or some of its predecessors (bit worse) but give at least 7VDC Vin-Vout drop.

Sorry here it is from post #4641. Thanks very much Salas! I will do more research on sslv1.1 bib.

 

[Salas]

No reason to make that, its older plus it has precarious bypassing in that drawing. See the builds thread of 1.1 and Reflektor-D. R-D you can stack symmetrically with virtual ground.

 

[merlin el mago]

Salas to bias with negative voltage the valve grid I guess the more adequate regulator is the BiB, right?

 

[Salas]

Grid does not need so low impedance dc bias source. Does not draw current before overdriven anyway. Maybe overkill? Try a battery first?