B1 with Korg Triode

[Soundhappy]

Anyways You do not unbalance gain with this 332K resistors https://www.mouser.fr/ProductDetail...EpiMZZMu61qfTUdNhG3EzrPz99APhI%2B4G%2BcQ3ZMc=
temperature drifft is little 25 ppm and price < 1€.
No worry about magnetic field influence CMF have no steel inside.
It's far away from expensive ~ 10£ boutique resistor with unknow datasheet

 

[Zen Mod]

K

 

[polaron]

Anyways You do not unbalance gain with this 332K resistors https://www.mouser.fr/ProductDetail...EpiMZZMu61qfTUdNhG3EzrPz99APhI%2B4G%2BcQ3ZMc=
temperature drifft is little 25 ppm and price < 1€.
No worry about magnetic field influence CMF have no steel inside.
It's far away from expensive ~ 10£ boutique resistor with unknow datasheet

Excellent!!
Now, I have 6 good large Sonicaps and litle warm Mallorys to put in parallel.
This order is so good that I have to find something useful to make 50 dol.
Missing 7 dol for free shipping!
All this for the price of one 2W Audio Note Silver.

Audiophiles, wake up!

 

[Soundhappy]

..I will look for 0,1% for 332R..

I don't see 332R ?
How much is value of two jfet's CCS resistors R1 on the pcb ?

 

[polaron]

Sorry, I meant 332K!!! I am distract.
This is the good one, the one you found.

https://www.mouser.fr/ProductDetail/71-CMF55332K00BEEB

 

[Soundhappy]

..Missing 7 dol for free shipping!
All this for the price of one 2W Audio Note Silver.

DIY Maybe get small batch of Fairchild J112 or J113 jfet's for 7 bucks ?

https://www.mouser.fr/ProductDetail...=sGAEpiMZZMv4z0HnGdrLjpo3FY8YkyPvXCHnFvlrrmA=

https://www.mouser.fr/ProductDetail...=sGAEpiMZZMv4z0HnGdrLjpo3FY8YkyPvl0z7hwtK7ec=

 

[polaron]

DIY Maybe get small batch of Fairchild J112 or J113 jfet's for 7 bucks ?

https://www.mouser.fr/ProductDetail...=sGAEpiMZZMv4z0HnGdrLjpo3FY8YkyPvXCHnFvlrrmA=

I don't remember but... isn't it necessary to have them matched?
I remenber I received a gift from Nelson...


R1 must be 100ohm, right?

 

[Soundhappy]

@ Polaron
I don't know how much Your four R1's value is ?
Could be possible make Ohmeter mesurements....or simply read color code bars ?
I can't see them very well on the photo.
My boards are for vintage Toshiba not Fairchild so R1 are not on the pcb.

 

[polaron]

Well, in the kit I received it was 100ohm, I remember now and i'm sure.

 

[Soundhappy]

Ok go for nice 100R Ohmite in R1 positions Cheers

 

[polaron]

Ok go for nice 100R Ohmite in R1 positions Cheers

done

 

[Soundhappy]

If not jfet's then tools maybe ?

https://www.mouser.fr/ProductDetail...xGVT3gSIsy%2BCoqcjWCkXC1fw/Bq0ZNbVLDDA0427w==

https://www.mouser.fr/ProductDetail/Aven/17010?qs=uwxL4vQweFPjLEoEC1hkDQ==

https://www.mouser.fr/ProductDetail/Aven/17541?qs=sGAEpiMZZMtyU1cDF2RqUE3R73UeL899uwhntr2NpnY=

 

[polaron]

I have all these tools, even CK cutter, luxury.
Braid from Stannol, the best.

I have to ask Nelson if he has a spare set of jets.

 

[Soundhappy]

I have all these tools, even CK cutter, luxury.
Braid from Stannol, the best.

I have to ask Nelson if he has a spare set of jets.

Make high quality work with such tools is more handy
Fairchild jfet´s are cheap from Mouser get some spares for the future

 

[polaron]

Should I have matched ones?

 

[Soundhappy]

@ Polaron
Yes matched see instructions in Mr.Pass B1Korg article.
Forgot write about this upgrade FN9222S1B-3-06 Schaffner | Mouser France

 

[Erlend Sæterdal]

change them all

You are not kind here Zen mod.

 

[Erlend Sæterdal]

To bright sounding

I really do not like the Korg. Very very bright sounding. I wonder why. I use a New Class D 24 v regulator.

 

[Soundhappy]

@ Erlend Sæterdal
Test voltage at T7 and T8 are 9.5 V ?
Power amplifier speakers connectors have reversed polaritys ?

 

[Erlend Sæterdal]

@ Erlend Sæterdal
Test voltage at T7 and T8 are 9.5 V ?
Power amplifier speakers connectors have reversed polaritys ?

I bought the parts selected from Diy Audio. But it measures all to low. Around 6.45 for both. How can I change this?

Thank you very much Sound happy.