Crack finish. Volts problems.

[michael30]

Hey there.

After some time with the crack I have a new problem .
Some static noises and chuckles that comes and go...
I tried replace rca + all cables, still there come and go.. also some really low background noise that always there but noting harmful. But the static and chuckle really annoying , what it may be ?
First hours used was dead silent .

Ty Michael .

 

[Paul Birkeland]

This could be an issue of solder joints or potentially interference from nearby electronics.  Are you using your computer as a source with the Crack?

 

[michael30]

Computer/iPhone
But I did unplug all, left it only connected with my headphones and it didn’t stop.
For now it stopped .
I will update if it will come back . Also I will upload all my solders ..and re solder any points you will tell me.

Thanks again
Michael.

 

[michael30]

Hey.
here is the photos. if something else needed i will update as soon as i see.
https://drive.google.com/open?id=1AIkd22uIUl4odWHvNJ6TgT_yk-UfVJlj

also i swap the 12au7 to cbs jhy 5814a from 10/1960 , for now looks like those chuckles and noises gone.
anyway i would like to fix any bad soldering.

Ty Michael

 

[Paul Birkeland]

I've found over the years that a lot of times swapping tubes will move solder joints that aren't 100%, which can make it look like an issue is tube related, but it comes back at a later time anyway.

You can also try this mod, which will help with external interference:

https://forum.bottlehead.com/index.php?topic=11676.0

 

[Deke609]

Hey.
here is the photos. ...

Hi Michael - you should delete your posting of the Crack manual - I don't think BH treats it as public domain.

cheers, Derek

 

[michael30]

Hi Michael - you should delete your posting of the Crack manual - I don't think BH treats it as public domain.

cheers, Derek

My mistake :-[,
fixed.
thanks Michael

 

[Paul Birkeland]

Hi Michael - you should delete your posting of the Crack manual - I don't think BH treats it as public domain.

Yes, whenever it gets posted, we get lots of e-mails for "replacement" power transformers

 

[Deke609]

Yes, whenever it gets posted, we get lots of e-mails for "replacement" power transformers

I'd sell them for $225 with the option to upgrade to the full base kit for just an additional $90.  ;D

cheers, Derek

 

[michael30]

I've found over the years that a lot of times swapping tubes will move solder joints that aren't 100%, which can make it look like an issue is tube related, but it comes back at a later time anyway.

You can also try this mod, which will help with external interference:

https://forum.bottlehead.com/index.php?topic=11676.0

I have sent you an email asking for the speedball guide , . so it’s me. :
And from your answer i understand that all the soldering looks good.

 

[Paul Birkeland]

I forwarded your e-mail to the replacement parts address to get you another download.

When in doubt about solder joints, just reheat them all.  This is what I do for any kit repair that I get in.  Reflowing all the joints in a Crack takes me 10-20 minutes at most.

 

[michael30]

I will do it , thank Paul. I have to admit again I've never encountered customer service like yours, maybe it's because of the country I live in, yet, I have to put it to your credit. Thanks and appreciation.
Michael

 

[michael30]

I forwarded your e-mail to the replacement parts address to get you another download.

When in doubt about solder joints, just reheat them all.  This is what I do for any kit repair that I get in.  Reflowing all the joints in a Crack takes me 10-20 minutes at most.

I check my voltages before 2 and 5 is 191v and 7 is 115v.
I rechecked my apartment outlets and it 240.1.
When I solder the power I did it for up to 235.
Do I need to change it? May it damage the amp?

The real problem is that I sometimes use outlets that give out about 228-235
And in my other apartment it’s 240.1 .
What do you think I should do?

 

[Paul Birkeland]

I check my voltages before 2 and 5 is 191v

The manual says 170V +/-10%, so there's no issue there.

7 is 115v.

The manual says 7 can be 90-115V.

Do I need to change it? May it damage the amp?

No.

What do you think I should do?

Nothing... listen to the amp instead of worrying about it.

 

[michael30]

After speedball, I’m satisfied, all working well with my cbs jhy 5814A.
The only thing that disappoints me is the stock 12au7 that making so much static and chucking,
I do not know the reason to it... barely used it, and can’t be use now because all of the unbearable noise. At least the cbs I dead quiet.

 

[Paul Birkeland]

Try letting that tube run for 50-100 hours, often times some run in time will resolve issues like that.