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Crack;Bottlehead OTL - Page 258

post #3856 of 7977
Quote:
Originally Posted by Sonido View Post

Thanks guys. I think I'm just gonna resolder all the joints.

 

Sonido - can you tell us which, if any, of the LED's and/or tube heaters are coming on right now?  It may be possible to narrow this down a bit and avoid having to pull your speedball boards. If your heaters aren't coming up (no tube glow at all?), for example, that narrows things down a lot.

post #3857 of 7977
Quote:
Originally Posted by skeptic View Post

Sonido - can you tell us which, if any, of the LED's and/or tube heaters are coming on right now?  It may be possible to narrow this down a bit and avoid having to pull your speedball boards. If your heaters aren't coming up (no tube glow at all?), for example, that narrows things down a lot.
No tube glow from either tube. I'll have to check LED's when I get home.
post #3858 of 7977
Quote:
Originally Posted by Sonido View Post


No tube glow from either tube. I'll have to check LED's when I get home.

 

That's actually good news from a trouble shooting standpoint.  Since your heaters run off ac, straight from the main transformer, I think you can pretty much focus on the joints on your transformer terminals and IEC outlet and ignore all else until the tubes light up.  Are you sure it isn't just your fuse?  Per the directions when measuring voltages set forth in the manual, take some measurements on the IEC pins and transformer terminals and let us know if power is getting to the transformer.  Sounds very much like it isn't.  Good luck!   

post #3859 of 7977
Quote:
Originally Posted by skeptic View Post

That's actually good news from a trouble shooting standpoint.  Since your heaters run off ac, straight from the main transformer, I think you can pretty much focus on the joints on your transformer terminals and IEC outlet and ignore all else until the tubes light up.  Are you sure it isn't just your fuse?  Per the directions when measuring voltages set forth in the manual, take some measurements on the IEC pins and transformer terminals and let us know if power is getting to the transformer.  Sounds very much like it isn't.  Good luck!   
I'll check the fuse again. Might as well replace it since I have spares. I'm using 0.5 amps slow blow because I blew the original fuse due to a short when I first finished building the Crack, and I wanted to get a 1 amp slow blow, but Radioshack only had 0.5 amp and it worked fine.

Another thing is I was in the middle of plugging my headphones in when it died. I do believe unlike other times, I was plugging it in slower than normal, and it got stuck a bit halfway. Maybe this caused a short? Either that or the vibration of plugging in shook loose a solder joint.
post #3860 of 7977
Quote:
Originally Posted by Sonido View Post


I'll check the fuse again. Might as well replace it since I have spares. I'm using 0.5 amps slow blow because I blew the original fuse due to a short when I first finished building the Crack, and I wanted to get a 1 amp slow blow, but Radioshack only had 0.5 amp and it worked fine.

Another thing is I was in the middle of plugging my headphones in when it died. I do believe unlike other times, I was plugging it in slower than normal, and it got stuck a bit halfway. Maybe this caused a short? Either that or the vibration of plugging in shook loose a solder joint.

Remember to use a bit higher heat than normal, I sit around 350-375 celsius on my dial with a 2-3mm chisel tip. This will reduce dwell time and allow you to work faster too. Double check that you have good mechanical connections too when you suck the old solder out. Hopefully that'll help you :)

post #3861 of 7977

Every now and then I like to get out and play Jeff Wayne's Musical Version of The War of the Worlds the 1978 version with the narration by Richard Burton. I havn't done so for a while and was truly surprised at how good it is through the Crack the spoken narration and sound effects are just excellent.


Edited by JamieMcC - 2/24/14 at 2:30pm
post #3862 of 7977
Quote:
Originally Posted by Sonido View Post

Another thing is I was in the middle of plugging my headphones in when it died. I do believe unlike other times, I was plugging it in slower than normal, and it got stuck a bit halfway. Maybe this caused a short? Either that or the vibration of plugging in shook loose a solder joint.


I don't think you can short your Crack by partially plugging in your headphones; that being said the act of plugging in the phones could have shaken a bad-joint loose.  That happened to me, I used to get a nasty "pop!" every once in a while when I plugged my phones in and I traced it to a bad ground wire-connection.

 

Hope you get this solved soon

post #3863 of 7977

Just got home. Confirmed that it's not a fuse problem, and none of the LEDs light up. Looks like bad solder somewhere.

post #3864 of 7977

Well that was easy. :)

 

Resoldered 5 or 6 solder joints that looked suspect. Added some leaded solder for good measure. Two were definitely bad and moved upon touching. I guess lesson learned here is unlike cars and gasoline, lead is good here. Actually, I learned this lesson a while back and built my Quickie with leaded solder, but it seems the mistake of using lead-free solder keeps coming back to bite. For those that don't know the difference between the solder types, lead-free solder has a higher melting point so it's harder to get it to the right temperature resulting in cold solders.


Edited by Sonido - 2/24/14 at 5:26pm
post #3865 of 7977
Quote:
Originally Posted by JamieMcC View Post
 

 

No it didn't and I was kind of expecting it to. Wiring and soldering is straight forward enough.  If you are after one with a termination block I suggest you could always check with the seller prior to ordering.

 

I have about 14 of them from an order I made over a year ago so it's all good. Just wondering why yours didn't come with the end terminal blocks for easy fast secure termination. 

post #3866 of 7977
Quote:
Originally Posted by JamieMcC View Post
 

Every now and then I like to get out and play Jeff Wayne's Musical Version of The War of the Worlds the 1978 version with the narration by Richard Burton. I havn't done so for a while and was truly surprised at how good it is through the Crack the spoken narration and sound effects are just excellent.

 

I love that album!!

 

Haven't specifically listened to it through the Bottlehead amps though - a track here or there, but not the whole album so I haven't really gotten into the moment with it

post #3867 of 7977
Loquah, Thanks you really dont need much to build these things biggrin.gif

Sonido, Lucky I was following the problems with your Crack, was thinking about using some lead free solder if I end up buying one of these tongue.gif
post #3868 of 7977
Quote:
Originally Posted by Aussiejuggalo View Post

Loquah, Thanks you really dont need much to build these things biggrin.gif

Sonido, Lucky I was following the problems with your Crack, was thinking about using some lead free solder if I end up buying one of these tongue.gif

Yeah, treat yourself to some 63/37 solder (smallest diameter you can get), a flux pen, a 2-3mm chisel tip and you'll be spared of these common issues when new to soldering :)

 

EDIT: Don't be shy on the heat either. If you find yourself waiting over 5-7 seconds for the solder flow, crank it up.


Edited by brunk - 2/24/14 at 5:39pm
post #3869 of 7977
Quote:
Originally Posted by brunk View Post

Yeah, treat yourself to some 63/37 solder (smallest diameter you can get), a flux pen, a 2-3mm chisel tip and you'll be spared of these common issues when new to soldering smily_headphones1.gif

EDIT: Don't be shy on the heat either. If you find yourself waiting over 5-7 seconds for the solder flow, crank it up.

So chisel tip is easier then pencil for this kinda stuff? I use a pencil on wire, thats about as far as my soldering knowledge goes biggrin.gif

Gonna probably get flamed... what does flux do again? I forgot lol redface.gif

One good thing with my soldering iron is it can do 30 or 60w, I dont have one of those fancy soldering stations just a good ol' wall plug cool.gif
post #3870 of 7977
Quote:
Originally Posted by Aussiejuggalo View Post

Gonna probably get flamed... what does flux do again? I forgot lol redface.gif
 

 

Fluxcapacitor = more jiggawatts.

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