Terminal 13 [resolved]

Jsmooth65 · 1553

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Offline Jsmooth65

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on: November 07, 2015, 12:41:08 PM
OK just finished building this thing, and I'm getting a solid 533k with no fluctuation on terminal 13 during the resistance check. 

Everything looks perfect as described in the manual, and all other terminals read normal.

I've run through the ground trace and all the grounds are ok.

Also, my fuse blows every time I try and turn it on.

Any ideas what would cause this? 
« Last Edit: November 09, 2015, 09:30:34 AM by Caucasian Blackplate »



Offline fullheadofnothing

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Reply #1 on: November 07, 2015, 02:19:10 PM
Post pictures.

Joshua Harris

I Write the Manuals That Make The Whole World Sing
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Offline Jsmooth65

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Reply #2 on: November 07, 2015, 05:25:29 PM
Ok here's some pics.  FYI I wired in a DPDT switch near the RCA inputs, to switch between RCA and ODAC, and I haven't wired the ODAC in yet.




Online Paul Birkeland

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Reply #3 on: November 07, 2015, 05:57:25 PM
That resistance measurement has a * in the manual, and the star states:

"The values signified with a * are going to
vary from ohmmeter to ohmmeter because these terminals are connected to the filter
capacitors, which try to charge themselves off the battery in the meter, causing a
fluctuating reading. If the circuit is connected properly these readings will wander in the
tens or hundreds of Kohms or higher range."

Your resistance measurement is consistent with this, so you can proceed to voltage checks.

-PB

Paul "PB" Birkeland

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Offline Jsmooth65

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Reply #4 on: November 07, 2015, 06:17:27 PM
I can't do the voltage checks, because the fuse blows every time I plug in the power.

I didn't know if the 2 were related.



Offline Jsmooth65

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Reply #5 on: November 08, 2015, 07:22:34 PM
You can't see it in the pics, but my 2 rectifier leads were touching just below the capacitor, which was causing the fuses to blow.  I had to dig through the forums for a couple of days before I found a thread with this same issue:
http://bottlehead.com/smf/index.php?topic=8042.msg77221#msg77221

Anyways, tubes are glowing and I'm doing the voltage checks now.