L'Amp: A simple SIT Amp

[nicoch58]

PS Olav I mean for ldr series resistor ...btw I put all over the place

[OlavHaal]

Originally Posted by nicoch58

PS Olav I mean for ldr series resistor ...btw I put all over the place

So - you recommend using shinkoh as a stepped resistor-potmeter instead of a ldr? Yeah, maybe I will give that a try - if there is enough space where my old 10k pot is residing. I doubt it will fit as it is - for the moment. Or maybe there is a way of making the pot a 4-5 steps resistor changer. I mainly use The B1 through the SIT with 3-4 positions = 40%, 50%, 70-80% Throttle. Denpending on the level that the CD,DSD or Flac/Wav is recorded. So if it weak in SPL(Pirates-Rickie Lee Jones) - I can use full speed without overly strong output and distortion. But if it is heavily recorded(Ashes and Fire - Ryan Adams) - I can use maximum 50% before it is too heavy in my room.

So maybe a good relay with 4-5 Shinkoh or other good resistors so one can choose a different output = 2/10 - 4/10 - 5/10 - 9/10?

How about this solution?

Best

Olav

[OlavHaal]

Hi Nicoch, Juanitox and Vdi_Nenna + whoever...

In the postbox 2 minutes ago - arrived my 2 1 uF Obbligato, my 4 big AMRG 220 ohm resistors and my 47 ohm AMRG(Amtrans).

Have to get my soldering-station ready and start doing some changeover - on the B1 in this step!
The 47 on The SIT must wait till the kids are off to school(family need some support also)

And the sound is now so good - that I`m nearly hesitating to start???

Well, off we go!

Best
Olav

[vdi_nenna]

Hi Olav,

I have the same problem. We won't know until the changes are made.
I'm going to give my amp a month or more before making any changes.
Been listening every night. Problem is the sound is so relaxing with simple, soft music, I fall asleep! Point is it's at least breaking in.

Have fun!

Vince

[nicoch58]

Nope Alov I use in the same way you use the caddock in the ldr...

[OlavHaal]

Originally Posted by nicoch58

Nope Alov I use in the same way you use the caddock in the ldr...

Pls pls Nicoch - do you have little schematic for the caddoc and the ldr - and how it is integrated. But this maybe belong to a B1 tread???

Now I have tried the Obbligato and the Amstrad - seems VERY promising!! Will come back with more listening-impression in due time.

Best

Olav

[dantwomey]

No AS-4440's available yet. Antek does have AN-4440's though. They say,

AN-4440 and AS-4440 are exactly the same except AS model has a metal shielding on the outside for EMI insulation.

Does anyone think the lack of EMI shielding would make a difference?

Regards,
Dan

[Michael Rothacher]

I think you'll be fine.

[vdi_nenna]

Can't hurt to remove noise. It's not what you hear. It's what you don't hear.
IMO I've heard both, if it's within spec, they both sound good.

[d to the g]

I'm a little slow on putting my 2sk82 amp together, but if you're considering new volume control consider an auto former volume control. They can actually increase the input impedence of your amp as you lower the volume, instead of decreasing it like a stepped attenuator.