Poor Serbian Man Optical Volume Control

[wabun]

I found mine the split supply will work at ~ 16mA and it stop acting balance when load exceed 20mA... the -Ve trail doesnt do thei work...

 

[Zen Mod]

Cook Book ( link in my signature ) - page 10 - picture - missing trace on pcb

did you saw that ?

 

[wabun]

finally i manage to bring it up by replacing the Darlington-Zener stage with a simpler 7812 & 7912. Now the circuitry working good, wow ! the sound is indeed bring mine ARLS2 to shame...
however, the image shifted to right channel, I did not use matched LDR, and it is costly n troublesome to do so as well, any idea to implement the balance control in this circuit ? Thanks for the great idea and wonderful project 🙂

 

[Zen Mod]

re-read Cook Book , or article , whatever

look for red LED trick

 

[ua100k]

Are your kits still for sale? If so, I will be ordering assuming you still have matching LDR's.
Also did you take a look at the Warpspeed kit. What do you feel is the difference?

 

[Zen Mod]

yes - I still have them ;

regarding Warpspeed ( Blues ? ) - I think that principle of signal attenuating is the same - and that is only important thing ;
how one is going to steer those LEDs is matter of approach , and there are many possibilities ;

read article and decide - is our solution interesting to you ......

 

[sklimek]

PSM LS Cook Book...

Hi ZM and Spavleski,

I am getting ready to start designing my pcb boards based on your PSM LS Cookbook. The question I have is I noticed that there were a couple of updates for your PCB01 boards from reading the thread. Is it safe to assume that your ‘cookbook’ is up to date with all your modifications, schematics and info?

Hey just wonderful article and project – thank you so much for all the hard work and sharing!

Stan

 

[Zen Mod]

everything in the book is ..... by the book !



go for it

 

[sklimek]

everything in the book is ..... by the book !



go for it

ay ay Captain!

On my way...

 

[thor61]

Zen Mod, If boards are still available, how much are you asking or what is the cost ? Also can the unit be configured to replace a 100K pot in a tube preamp ? 😕

 

[Dr.H]

Zen mod, are kits/boards still available?

 

[palmito]

Same question as above... I'm interested in purchasing a kit if still available. Thanks.

 

[ZUM911]

Good luck, I have repeatedly pm'ed and emailed ZM with no response on this.

 

[Zen Mod]

I'm here ;(

soon to be solved issues with (non)working Paypal account ;

I'm still behind Iron Curtain

 

[heinz1]

Dear ZM,

Great! I would be interested in an "A" package with an extra buffer board (if possible). I have no need for jfets.

Thanks

 

[palmito]

Thanks Zen Mod. Should we pm or email you if we are interested or you will post here when you can do paypal again?

 

[Zen Mod]

I'll post here

 

[José Humberto]

Buffer is running

Hello alls.
Some years later I finished the buffer´s PSMLS. Is running with LDR in SE with the George hifi´s schematic. The sound is fantastic, very transparent. Perhaps I haven´t get the top because I have +12,3v and -11,7V in the rails.
Another question, with central tap, the transformer must be 18-0-18V?

Thanks a lot to ZM, Spavleski, George and all people who be this possible.
JH

 

[Zen Mod]

Another question, with central tap, the transformer must be 18-0-18V?

yup

you must have some voltage headroom for shunt regs

nature of the beast 😉

 

[José Humberto]

Thanks a lot.
I´ll go to test buffer-Ls, buffer-LS-buffer and build a nice box.