Crack Final Check [resolved]

LuckyGus · 1671

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Offline LuckyGus

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on: June 11, 2015, 12:06:46 PM
Hello,

First-time builder here. On the final voltage check, the TRS jack voltage doesn't seem to climb to 9V and then drop back down again. It only climbed to 0.1V and then dropped down to zero. Is this a problem? If so, what can I do to fix it? Here's a photo of the TRS jack:

Thanks
« Last Edit: June 15, 2015, 05:24:03 PM by LuckyGus »



Offline Loggie

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Reply #1 on: June 12, 2015, 01:06:27 AM
It seems you may have forgotten to ad the connections seen in the picture below marked in red:

(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fimageshack.us%2Fscaled%2Flanding%2F689%2Fcrackv.jpg&hash=bfafb2fca9c2241ab6d9ed054d0e6cd2c4b0e955)

Picture taken from this thread:
http://bottlehead.com/smf/index.php?topic=2946.0   (reply #9)

Here is a picture from my build and beneath is a "Paintjob" of yours:


« Last Edit: June 12, 2015, 02:02:10 AM by Loggie »

Arno

Bottlehead Crack--Lenco L76-Thorens TD147--Cyrus IIIi+PSX-R--KEF Q7--Klipsch R-26F--Marantz CD72 SE--Philips CD202--Musical Fidelity XLPS V3--CNC Phono Stage


Offline Strikkflypilot

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Reply #2 on: June 12, 2015, 08:19:15 AM
That mod is there so there should be minimal voltage spike on startup.
The OP already HAS NO voltage spike.
So if all resistances and voltages check, there really isn't much point in doing the mod.

Of course there is a chance the meter doesn't pick up the spike if it is there, since it doesnt last long.
« Last Edit: June 12, 2015, 08:21:24 AM by Strikkflypilot »

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 Paul Birkeland

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Reply #3 on: June 12, 2015, 01:15:23 PM
Yeah, a lack of a spike isn't necessarily a cause for concern, we just mention it because if you have 9V at the headphone jack, and it never drops, then there's a problem worth looking into!

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man