Wondering what I messed up on with this build

zata40 · 2084

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Offline zata40

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on: December 17, 2014, 03:01:51 PM
I would greatly appreciate help with this.  I've checked over the wiring many times (and all the connections), but  I'm not sure what's wrong.  The impedances are all correct, but the tubes don't glow and then the fuse breaks.  (https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FRBU2WgS.jpg&hash=873e2ffb56bff276282c335998b7973b419f2442)
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FbUcAgm7.jpg&hash=09390702eb72856e222cae79d2ac0af2909f623a)
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FbUcAgm7.jpg&hash=09390702eb72856e222cae79d2ac0af2909f623a)
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FHmum3qw.jpg&hash=ccfeb27dcce65cb22257bf8d7d7e3b9c5b509964)

Thanks, Adam


Offline John EH

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Reply #1 on: December 17, 2014, 03:21:54 PM
Is that resistor lead on the 5W resistor touching terminal 1 on the transformer.   You didn't trim a whole lot of your leads.  My money is something somewhere is touching and shorting to something else or ground.


Offline zata40

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Reply #2 on: December 17, 2014, 03:32:12 PM
It does look like that, but it's suspended just over a quarter inch away.  For many of them, I only trimmed them minimally in case I had to redo something I messed up.  After looking closely, I don't see any wires or ends touching anything but other wires leading to the same terminal. 


Offline Kris

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Reply #3 on: December 17, 2014, 04:20:48 PM
Did you connect 220uF electrolytic capacitor to terminals 19 and 20 instead of 20 and 21?
And clip those leads for God's sake.
« Last Edit: December 17, 2014, 04:32:50 PM by Kris »


Offline zata40

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Reply #4 on: December 17, 2014, 04:31:57 PM
You're right!  Great eye.  I'll see if that fixes it.  I didn't even realize that.  How did all my impedances match with that mistake?


Offline Kris

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Reply #5 on: December 17, 2014, 04:43:59 PM
Also, double and triple check orientation of all four rectifiers (just in case).
« Last Edit: December 17, 2014, 05:37:38 PM by Kris »


Offline zata40

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Reply #6 on: December 17, 2014, 05:44:17 PM
It's working now.  Thank you!


Offline JamieMcC

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Reply #7 on: December 17, 2014, 09:04:24 PM
Those little finger nail clippers work well for snipping of the excess lengths of lead.

Shoot for the moon if you miss you will still be amongst the stars!

Offline Strikkflypilot

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Reply #8 on: December 19, 2014, 08:09:01 AM
It looks like You have considerable gaps where the wood is glued together.
You might want to do something about it, at least for safety

Home system:
Sources: Ibasso DX90, Google Chromecast Audio optical out
DAC: Schiit Gumby
Amp: Bottlehead Mainline
http://bottlehead.com/smf/index.php?topic=7463.0
Phones: HD800S

Office:
Sources: Iphone/ Ipod
DAC: Dragonfly Red+Jtrbug
Amp: Crack/Speedball heavily modded
Phones: HD580,HD600 grilles

Offline Codeine

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Reply #9 on: December 19, 2014, 01:10:12 PM
Have you been using lead-free solder? if not then reflow all your joints to avoid cold joints. They look dull.


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