My Crack Build

lior.amsalem · 23102

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Offline lior.amsalem

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Reply #45 on: January 11, 2012, 10:14:01 PM
Hi There,

Resistance check: DONE
Voltage check: DONE

Crack is working! I'll get home today for a first sound session.

Thank you Bottlehead! I'll upload some more pictures later.


Offline lior.amsalem

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Reply #46 on: January 12, 2012, 06:03:05 AM
I'm speechless so you'll have to do with WOW !!&*($%#@$#$^$#%&%^$*&^
I'll go listen for now :)


Offline Jim R.

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Reply #47 on: January 12, 2012, 06:05:31 AM
Lior,

Congratulations on the successful build!  Yes, go enjoy -- but if you think it's good now, just wait... :-)

-- Jim


Jim Rebman -- recovering audiophile

Equitech balanced power; uRendu, USB processor -> Musette DAC -> 5670 tube buffer -> Finale Audio F138 FFX -> Cain and Cain Abbys near-field).

s.e.x. 2.1 under construction.  Want list: Stereomour II

All ICs homemade (speaker and power next)

Offline matthewmckay

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Reply #48 on: January 12, 2012, 07:04:19 AM
Holy smokes !!!   what a beautiful job you did with braiding the input wiring..  Bravo!  ...mine did not quite turn out like that.


Offline lior.amsalem

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Reply #49 on: January 12, 2012, 10:34:22 AM
Just ended up a long music session (if it was my call I was still listening), this amp surely sings!
The most notice character is the great separation I never heard before!

uploaded few more pictures.
« Last Edit: January 12, 2012, 10:36:04 AM by lior.amsalem »


Offline jrihs

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Reply #50 on: January 12, 2012, 03:07:59 PM
Yess, great separation with mine to. nice job. BTW, your jack is the second I've seen w/ the gasket. Mine did not come with one...its the nickle version though. I wonder why that would matter though?

Cheers

John Rihs

Offline lior.amsalem

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Reply #51 on: January 13, 2012, 04:44:41 AM
Quote from: jrihs on January 12, 2012, 03:07:59 PM
BTW, your jack is the second I've seen w/ the gasket. Mine did not come with one...its the nickle version though. I wonder why that would matter though?

You'll have to buy the gasket separately, it's not a part of the HP Jack.
And it's only aesthetic, no other advantage or so.

LA


Offline lior.amsalem

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Reply #52 on: January 18, 2012, 12:08:10 PM
Hi All,
Just finished the speedball upgrade! that's sound even better! Photos updated! voltage test is ok.
Had to use a small "bridge" to connect the speedball large plate to the other tube A pin, the suggested pin was too crowded with cables under...

I hear hum noise if no source is connected and I turn the volume all the way up, is that normal? or I should be dead silent same like when a source is connected?

Also, while doing the SB upgrade I've accidentally touch the film cap, very shallow and light touch (see the pictures), do you think it's ok or I just destroyed the cap?


Thanks for everything,
LA
« Last Edit: January 18, 2012, 01:00:22 PM by lior.amsalem »


Offline Grainger49

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Reply #53 on: January 19, 2012, 12:37:18 AM
The proper way to test hum is with the inputs shorted rather than open.  Leaving them open allows noise in and causes some hum.  Of course turning the volume all the way up is an unrealistically high volume level.  What matters is the normal listening level.

That said I wouldn't be surprised if you turned it all the way up with shorted inputs and didn't get any hum.  That assumes a top notch build.  My Seduction has always had a very low level hum.  But most folks don't know it is there sitting at the listening position and at listening volumes.


Offline Laudanum

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Reply #54 on: January 19, 2012, 02:34:24 AM
Yeah, Crack is really quiet.  With open inputs, I dont know.  But wide open with a digital source connected, not playing, amazingly quiet.  No hum with mine at all.   I assume it would be the same with shorting plugs on the inputs. 

Desmond G.

Offline lior.amsalem

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Reply #55 on: January 19, 2012, 03:07:15 AM
Well, that's the same that thing I'm getting: shorted or with source connected I get dead silent even with volume knob all the way up.

What about the cap? what do you think? I'll try to get a better photo when I'll get home...


Offline Grainger49

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Reply #56 on: January 19, 2012, 03:52:29 AM
If the cap is playing you are fine.  If you damaged it I think you would know.


Offline lior.amsalem

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Reply #57 on: February 07, 2012, 10:10:24 PM
Hi all,
I've been enjoying my crack for a few week already. but what's next? (I'm addicted)
While waiting for the BH DAC (hoping it'll be in a manageable price point)...
What will adding a power supply cap bypass and a choke will add?
How do I wire them?

Meanwhile, I've waited for the base to fully dry out and now i'll do the last sanding and painting.

Thanks,
LA


Offline Grainger49

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Reply #58 on: February 08, 2012, 01:23:39 AM
Quote from: lior.amsalem on February 07, 2012, 10:10:24 PM
Hi all,
I've been enjoying my crack for a few week already. but what's next? (I'm addicted)
While waiting for the BH DAC (hoping it'll be in a manageable price point)...
What will adding a power supply cap bypass and a choke will add?
How do I wire them?

Meanwhile, I've waited for the base to fully dry out and now i'll do the last sanding and painting.

Thanks,
LA

What's next how about upgrades:

http://www.bottlehead.com/smf/index.php/topic,776.0.html


Offline lior.amsalem

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Reply #59 on: February 08, 2012, 01:53:57 AM
Yeah, went thru it already.
What's left for me is PSU upgrades if needed with Speedball installed and maybe score a 5998 tube in a good price somewhere.
Anyone have a not so crazy priced source for the 5998 tube?

Anyway, regarding the choke again, will it make any different when Speedball installed already?
I've order few Mullard 12au7 tubes to experience with and a  TS 12bh7 as well.
I'll report back :)

LA


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