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Old 26th July 2012, 06:30 PM   #1361
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193V works fine at 2amp
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Old 28th July 2012, 10:37 PM   #1362
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Finished the SIT CCS. It biased up and locking in at 1.55v across 1 ohm resistor.

Played an MP3 through it to hear something and I can tell there is something special about it already. Vocals are pretty freaky! :-)

Thanks to Mike and everyone!! :-)
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Old 28th July 2012, 11:13 PM   #1363
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Congratulations!

Now get ready to spin some wax.
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Old 29th July 2012, 12:18 AM   #1364
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No joke. Threw on some Berlioz. Symphony Fantastique.
Crazy! Then I realized the phase was reversed on the outputs.
Going to have to listen all over again!
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Old 29th July 2012, 02:09 AM   #1365
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Don't laugh. With SITs it tends to make a difference, depending on the
recording.

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Old 29th July 2012, 02:35 AM   #1366
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Quote:
Originally Posted by Nelson Pass View Post
Don't laugh. With SITs it tends to make a difference, depending on the
recording.

It made a big difference, yet it wasn't completely annoying. Took a few tracks to figure it out.

This Cool Aid tastes good!!, Its going to be hard going back to anything else.
Hope SITs become more available soon, like you said.
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Old 29th July 2012, 07:01 AM   #1367
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Smile Try some higeher resol...

Quote:
Originally Posted by vdi_nenna View Post
Finished the SIT CCS. It biased up and locking in at 1.55v across 1 ohm resistor.

Played an MP3 through it to hear something and I can tell there is something special about it already. Vocals are pretty freaky! :-)

Thanks to Mike and everyone!! :-)
Hi Vdi_Nenna!

You should have a go at some good Wav or DSD recording - yesterday I downloaded some from BlueCoast in 2,8 MHz resolution - burned them to a DVD - and played them through my new Sony SCD-XE800.
And through my B1 - SIT resistorbuildt - and it is like the whole acoustic band is inside my living room.
I have ordered some Amtrans resistors in the signal path on the B1 and the 47 ohm on the SIT. Just to hear if resistors make a difference.

Best

Olav
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Old 29th July 2012, 08:18 AM   #1368
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hi olav , yes it makes differences i have changed these from carbon film ( KIWAME) to Charcroft Z foil , and Cadock MKP132 and first i was somehow disappointed as it sounds less warm but at last i prefer this more transparent sounds but the best trick i have done is to replace the gate resistor load of the SIt with an amorphous Silk grid choke. as this swapping the 10uf input Cap with a 0,22uf Vcap teflon without loosing bass
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Old 29th July 2012, 11:02 AM   #1369
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Quote:
Originally Posted by OlavHaal View Post

You should have a go at some good Wav or DSD recording - yesterday I downloaded some from BlueCoast in 2,8 MHz resolution - burned them to a DVD - and played them through my new Sony SCD-XE800.
And through my B1 - SIT resistorbuildt - and it is like the whole acoustic band is inside my living room.
I have ordered some Amtrans resistors in the signal path on the B1 and the 47 ohm on the SIT. Just to hear if resistors make a difference.

Best

Olav
Thanks for the site tip. I'll check it out.

Using a naked Vishay 47 ohm resistor at the gate. There's a Mundorf cap at the output, but will switch out for a ClarityCap to see the difference.
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Old 29th July 2012, 05:40 PM   #1370
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Wink So many suggestions

Hi Juanitox and Vdi_Nenna!

Yes - I also wondered about the naked Charcroft as gate resistor and in signalpath resistors in B1. But I will first change my Wima 1uf w Obliggato and old Dale metalfilm with Amtrans to see if it is room for further impowement.
Then later I will change to Charcroft if you think it still is a good idea? Good to have some exciting change of sound later this year.
There are so few resistors in our amplifiers anyway - so it woun`t be any big amount of money with some change at times(once the amplifiers mainbuild is up and running) Just fun to change!!
And you Juanitox changed your potmeter to a LDR - I need one myself. I have found the OptiVol which looks promising - and with a zenerdiode(15v) it can be fed from the supply that feed B1.

Best to all

Olav
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