Snapped mje5731ag lead

spiral2012 · 2743

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Offline spiral2012

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on: February 05, 2015, 08:59:34 AM
Just bought a used crack and once of the MJE leads broke during shipping.  Is there a way to resolder it or do I need a new one.  The lead broke where it meets the board.  The remaining lead is after the taper and too thick to insert in the hole.  Any help is greatly appreciated.


Offline Paul Birkeland

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Reply #1 on: February 05, 2015, 09:08:40 AM
Is this on the MJE350 or TIP50?  If it broke at the board, just apply a tiny bit more solder.

-PB

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline spiral2012

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Reply #2 on: February 05, 2015, 11:23:53 AM
I believe it's the MJE350.  Worried the lead pieace in the board would fall out or the connection won't be strong enough.   So just add a bit of solder from the top side and leave the broken piece in place?


Offline spiral2012

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Reply #3 on: February 05, 2015, 11:28:08 AM
Here's a better image.  Yellow line is where it snapped.


Offline Nathan

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Reply #4 on: February 05, 2015, 12:24:33 PM
Mouser has this part for under a dollar. I would look to replace the part.

Crack/Speedball, SEX 2.1/C4S, Bryston BHA-1

Sennheiser HD600/Cardas cable, Beyerdynamic T1 2nd Gen, Hifimam HE560/Hifiman balanced cable

Offline fullheadofnothing

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Reply #5 on: February 05, 2015, 01:52:13 PM
That looks solderable, but you'd have to try it to find out.

It is worth noting that it's not the stock part, and neither are the visible resistors. The larger resistor on the small board is quite clearly the wrong value, the small one isn't legible, so I can't know. Did your seller disclose the nature of the modifications he did?

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Offline spiral2012

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Reply #6 on: February 05, 2015, 03:16:54 PM
Quote from: fullheadofnothing on February 05, 2015, 01:52:13 PM
That looks solderable, but you'd have to try it to find out.

It is worth noting that it's not the stock part, and neither are the visible resistors. The larger resistor on the small board is quite clearly the wrong value, the small one isn't legible, so I can't know. Did your seller disclose the nature of the modifications he did?

This was apparently one of the first speedballs, built in house by BH.  Here's the link to the original listing.  https://www.head-fi.org/t/670457/sold-limited-edition-bottlehead-crack-speedball-mint-condition-price-drop  Changed hands a couple times before I got it.  Everything looks the same as the OG picture though.  I'm assuming the guys at BH changed some parts when they decided make this a regular production part.  I could be wrong though.  Any issues you see with the parts in the listing pic?  Many thanks!


Offline spiral2012

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Reply #7 on: February 05, 2015, 03:33:57 PM
More pics
« Last Edit: February 05, 2015, 03:44:34 PM by spiral2012 »


Offline Doc B.

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Reply #8 on: February 05, 2015, 05:02:21 PM
That looks like a very simple fix to me. Just straighten the transistor and put the tip of the iron right in the corner made by the busted lead and the solder pad and flow some solder to make a good fillet. No problema.

Dan "Doc B." Schmalle
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Offline spiral2012

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Reply #9 on: February 05, 2015, 05:57:09 PM
Quote from: Doc B. on February 05, 2015, 05:02:21 PM
That looks like a very simple fix to me. Just straighten the transistor and put the tip of the iron right in the corner made by the busted lead and the solder pad and flow some solder to make a good fillet. No problema.

Thanks,  Doc!   Would love to hear about the differences between this one and the current speedball from the man himself.


Offline Paul Birkeland

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Reply #10 on: February 05, 2015, 06:18:22 PM
Yes, I built this amplifier.  These are incredibly rare and certainly something to hang onto!

If you have any issues getting it working, this does fall under our flat rate repair service, and we'd be happy to take care of it for you.

As Doc B. said, just hit that leg with your soldering iron and you should be OK.

-PB

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline spiral2012

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Reply #11 on: February 06, 2015, 05:27:05 AM
Quote from: Caucasian Blackplate on February 05, 2015, 06:18:22 PM
Yes, I built this amplifier.  These are incredibly rare and certainly something to hang onto!

If you have any issues getting it working, this does fall under our flat rate repair service, and we'd be happy to take care of it for you.

As Doc B. said, just hit that leg with your soldering iron and you should be OK.

-PB

So awesome!  Definitely glad I picked this one up.  Any sonic differences between this and the current speedball?  Thanks!


Offline Paul Birkeland

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Reply #12 on: February 06, 2015, 06:30:14 AM
Your Crack uses a different driver tube, which is what sounds different.  Some components on the Speedball are modified to make this work.

-PB

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

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