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Managed to make that pot 25k. Thank you for the link.
I found another mistake. I have soldered both lugs of 220nF (blah). Now it`s how it should be.
But allow me try to explain what is going on.
1. Switch OFF -> Nice warm sound and when i turn Bias CW or CCW I have respectively more or less "room". I guess this is because of increasing or decreasing voltage if I understand the purpose of this trimpot right. If I turn LEVEL pot it goes quieter or louder.
2. Switch ON -> LED`s are light -> All of the above but there is no delay only oscillation when I play with rest of  the pots. I still have guitar signal going thru only that it is NOT delaying.
Prove me wrong but I think that somehow the signal bypasses IC2.

And Merry Christmas to all of you

The footswitch disconnects the input to the delay line. The delay itself is never shut off (tails). Thus, if the repeats are set to lots of repeats, it will carry over a long time. If you turn the repeats way up (past about 2:00) when you have it bypassed, it may self-oscillate even if you haven't played any notes.

One trim pot is a low-pass filter on the delay line. That's the one closer to the PT. It will make the delay repeats sound brighter or darker.

The other trimpot sets the bias for Q2. You have to use your multimeter and adjust it until the voltage on Q2's drain pin is about 10-12V. You can do it by ear, but it's better to at least start from that point.

If the oscillation you are talking about is the high-pitched whine, that is likely still a power filtering issue, or it could be related to the MAX chip. If you are no longer hearing the high pitched whine AND the delay does not oscillate until the repeats are above ~1-2:00, then the pedal is most likely working as it should.

After some reading I decided to sub 2n5457 for BF245A. A little step forward because when I turn R and D pots I don`t have immediate oscillation. I`ve  found also that I soldered Mix pot maybe wrong because when I turn it CCW oscillates -> CW stops oscillating. Pot is B50K - how to make it B25K?
And suddenly when I was playing with trims I touched with screwdriver pin 13 (?) and I heard repeats. But not repeats of guitar but like when you short something. All pots were full CW and I started to turn them. They behaved like they should ( I have had Sea Urchin and I know what to expect)
What do you think?

The repeats pot is a HUGE reason you're having the oscillation issue (also, it sounds like it could be backwards ... pin 1 should be ground). Anything above 25K will oscillate at like 9:00, and it should be an audio taper for best performance. The reason it's a smaller value -- and oscillates easier -- than other PT2399 delay designs is that there is far less filtering in the delay path, so more signal is present. The smaller value on the pot help correct this without relying on extra filtering.

Here's the required reading for calculating the resistors needed to make your 50K pot a 25KA:

http://www.geofex.com/article_folders/potsecrets/potscret.htm

Witch one is emitter resistor of Q1? If 1K then it is grounded witch means that my trany is reversed isn`t it?

I drew the layout for a 3904. The BC549C has a reversed pinout. The emitter of whatever transistor you use goes on the right.

If you can set up an audio probe, I need to you follow the audio through the schematic and tell me where the oscillation is introduced. Set the repeats to zero for now.

Schematic is here for reference:
https://docs.google.com/document/d/1P7uOYFRH6ZW5eGoquhAiMQMyUU76bod_gNKkiSlPNJM/edit

Is the emitter resistor on your BC549C grounded? The emitter voltage should be maybe a couple of volts at most.

Your 2N5457 should also have something more like 10V on the collector.

Your multimeter seems to be reading about 10% too high, too. Might be time to change the battery.

After you fix the emitter on Q1:

What are you powering it with? Try sticking a 100R in series with the power supply (use alligator clips or something if you have to). Does the noise get quieter?

Also, do you have any delay? Or is the chip still motorboating?

Bought some new IC`s today and here is what is going on after I put the new one - oscillation even with the bypass (preamp) and sound is kind of dull and distorted. Meanwhile I realized that one of the pins of Q2 is not soldered - now it is. These are the missing solder joints http://i608.photobucket.com/albums/tt164/kokySX/ad27aeb2-2b64-49b3-aa62-a2ae6714c97e_zpsf94e8e45.jpg
Then I forgot to put Q2 back and plugged the pedal again to see if this is the problem. WOW what a nice clean sound on bypass and wet ... DANG ... I saw that 2n5457 is not on its place. Put it back in and oscillation is back.
Any suggestions what to do now?

What type of oscillation? power whine (super high pitched), or the PT2399 is oscillating a lot?

What are your voltages like now?

Good call Jon.

I was born in 82. I was 9 when Ten/Nevermind came out. 12 when Vitalogy showed up, and 13 for Melencholy. Formative stuff man.

Jacob

Holy crap, you're YOUNGER than me?!

Weird thing: I didn't listen to any music in middle school. The radio only incidentally. I think the first full album I ever heard was Dookie. I still have the copy I first bought ... it's one of a handful of CDs that didn't get stolen when I moved back to Baltimore from Texas (I had a book of 300 CDs stolen out of my car when I went to an open mic just after getting home). Fortunately I went through a particularly snobbish folk phase and didn't bother taking that CD or most of my other 90s albums with me.

I like the faceplate look, maybe even a little better than the etched enclosure.

Where do you get those knobs anyway?

http://www.smallbearelec.com/servlet/Detail?no=110

Mellon Collie & The Infinite Sadness.

Someone posted this on reddit. I listened for 5 minutes and popped in the real thing. It's still so frigging good.

a talent booster?

Yes, in a way.

(besides, is there a functional/hearable difference between a MA856 or 1S1588 and a generic si diode?)

1S1588 are basically the Japanese part number for 1N4148 -- that is, it's a generic silicon diode that is the equivalent of most generic silicon diodes.

The MA856 actually is a little special in that its Fv is closer to .8V, which can make a small difference. The BAS45A is a Fv match for the ones I have here, but that one's obsolete now, too. Otherwise they're silicon diodes, and you can stick a schottky in series with a 4001 to get to the same Fv.

Well, I know what I'm making for lunch tomorrow!

Yeah, but they all have a really big tolerance or are relatively expensive.
I was hoping to get a little stash of tight tolerances.

I think the problem is that it's an obsolete value that was never much used in the US to begin with.

Personally, I'm using 4.7nF caps and assuming that there's a resistor I can alter somewhere to result in the same frequency cutoff.

Did you check Mouser?

I've apparently decided that grilled cheese sandwiches with fancy cheddar are the greatest thing ever. I think it has something to do with frying the bread in a lot of butter.

Also on Staycastion next week. I actually took all my vacation time this year after not taking anything but a couple days for the last several years. :/

I plan on playing a LOT of guitar.