Crack around the world !

[Guy 13]

Hi all.
Soon a Crack headphone amplifier will be travelling half way around the earth to reach its final destination,
which is in Vietnam to drive a pair of Sennheiser HD-650?
And the happy owner will have an un-erasable smile on his face and that will last until he kicks the bucket.
Yes, I will be the happy owner of a Crack that a fellow member here by the name of galyons (I hope I go his name right) put together for me.
He did the soldering, painting, staining, up-grading and more.
He did such a fantastic job, that I can recommend him with any hesitation.
My Crack looks so nice, awesome, fantastic and sexy that I will have no other choice than put beside him his big brother the no other than: Stereomour.
However, this will only happen if I win at the lottery.
Here is what I am talking about.
Don

 

[JamieMcC]

Looks smart in red. What are the bypass caps?

 

[Guy 13]

Looks smart in red. What are the bypass caps?

Hi JamieMcC
Looks gorgeous in red.
Red is my favorite color.
For the bypass caps, don't ask me, ask : galyons.
I don't have the Crack in front of me and I think he still has it.
Thanks for the comments.

Guy 13

 

[Guy 13]

Hi all.
Anyone can show mw how to change my avatar.
I want to post my actual fire red Crack.
Plus, I like to show the phrase:
Audio should be simple.
Thanks.

Guy 13

Please make your explanation extremely simple.
I am not crazy enough to set fire,
but not smart enough to extinguish it.
If you know what I mean?

 

[JamieMcC]

Go to your profile page and select modify profile in the drop down menu select forum profile.

Just pick which method you wish to use

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[Guy 13]

Go to your profile page and select modify profile in the drop down menu select forum profile.

Just pick which method you wish to use

Personalized PictureNo avatar
Choose avatar from gallery
Specify avatar by URL
Upload an avatar

Hi JamieMcC
Thanks for the simple instructions,
it worked on my first trial,
that's a first,
usually it takes my several dozens of try
and most of the time I give up.
But your step by step instructions made it super simple
for a none tech guy like me.
Thanks again.

Guy 13

 

[Guy 13]

Hi (Again) Jamie McC
While I got your attention, I will push my luck, by asking you:
How many posts does it take to be one step above Jr member?

Guy 13

 

[JamieMcC]

Sorry but I do not have a clue.

 

[galyons]

Looks smart in red. What are the bypass caps?

The red isn't paint, it is hard anodized then dyed.  I left the nice BH texturing of the plate.

The bypass caps are Russian K75, a hybrid aluminum, paper and mylar in oil.  The electrolytics are Panasonic ED 47uf. (Guy runs Senn HD650's)  After listening with my vintage AKG K240 Sextett's, I think I may try 68 or 82uf Pannies.

I, too, like the red.  But the main functional purpose was to seal the aluminum and base against the Vietnamese humidity.  So, for once, form follows function!

Cheers,
Geary

 

[Paul Birkeland]

There is a tremendously fatal flaw in that build that is likely to at least damage the 6080 at some point during operation.

 

[galyons]

There is a tremendously fatal flaw in that build that is likely to at least damage the 6080 at some point during operation.

    Please say what it is!

Cheers,
Geary

 

[Paul Birkeland]

Terminals 7 and 8 are nearly shorted.  8 and 9 are likely to short for the same reason.

 

[galyons]

Short against what?  Please don't make this a guessing game.

Cheers,
Geary

 

[Paul Birkeland]

Short against what?  Please don't make this a guessing game.

Cheers,
Geary

The giant, floating pieces of metal that are right next to them (that didn't come with the kit).

 

[galyons]

I assume you are referring to bypass caps and perhaps (?) shorting on the octal pin terminals?  The caps have shrink wrap on the lower part.  The octal socket pins below have insulating sleeves pulled down over them. The sleeves can be slid up the wires for de/re-soldering.  I was going to put the bypass caps on the sides with fly leads, but thought the shorter, more solid leads and insulation would be more reliable.

If you think that side mounting with fly leads would be safer/better I will do so.  I am trying to make the build as "bullet proof" as I can to, hopefully, avoid issues with the travails of this Crack's journey to Vietnam. 

Cheers,
Geary

 

[Paul Birkeland]

It tends to be that the metal case of the cap itself will conduct to whatever it touches.

In this case, you can press one (or both) of those metal bodied caps onto the rear 5-lug terminal strip, which will short the 6080 cathode(s) to ground.

These things are also pretty heavy, and generally ship pretty poorly unless they are lashed down to something pretty secure. (I had a Seduction come in that had a few rattling around)

I don't mean to come across harshly, you did such an excellent job on the rest of the build that it would be truly devastating for something like that to go wrong in transit. 

-PB

 

[galyons]

Thanks Paul . I was going to replace the current 'lytics for more capacitance anyway. So I will do fly leads on the Russky caps and mount to the side areas of the terminal strips.

Better safe than sorry, especially when the issues, if any, will occur half the planet away!!

Cheers,
Geary

 

[Paul Birkeland]

There is a pretty slick way to do this that will give you the space you need and good security for travel.

Grab an extra 3-lug terminal strip (Mouser has them), then mount it up by the 5-lug strip on the octal socket, off to the left side of that strip with the chassis flipped over.  Feed the 6080 cathode wires that go to 7/9 to the outer lugs of this t-strip, then put axial electrolytic capacitors between this terminal strip and the headphone jack.

Since you have axial caps that are stretched out, you can glue them to the chassis plate.  Additionally, you can bypass these caps easily with other axial film caps, and these can be glued down pretty easily too. 

 

[Grainger49]

Geary,

I bought a 4' tube of heat shrink for insulating KKs.  I finally found some that will go around the largest caps I have. 

It had made me queasy.  The 0.1uF@200V were not a challenge.  The 0.22uF@600V were the largest I have insulated.

 

[mcandmar]

Thats what i did with my FT3's, clear heat shrink around the outside and shrink on the lead wire connections just in case.