Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: hwaitung on August 02, 2014, 04:58:37 PM

Title: Help needed... Spark when making voltage check with Speedball [solved]
Post by: hwaitung on August 02, 2014, 04:58:37 PM

I have done the stock build of Crack and everything is fine and it sounds wonderful.

After I installed the Speedball upgrade, I plugged it in for voltage check. Everything looks normal at first, the tube lights up all LEDs on the speedball lights up, so I proceeded to test the voltages. The first 6 terminals are within spec but when I probe terminal 7, I got a spark! It seems to be dead now. (I suspect that I accidentally shorted a neighboring wire during the probing)

I have unplugged it now and the fuse seems intact and there are no obviously burnt components. Are there any suggestions on how to proceed?

Thanks in advance!

Title: Re: Help needed... Spark when making voltage check with Speedball
Post by: Doc B. on August 02, 2014, 08:12:01 PM

Best bet at this point is to start the voltage checks over. Let us know any that are off from the numbers in the manual.

Title: Re: Help needed... Spark when making voltage check with Speedball
Post by: hwaitung on August 02, 2014, 08:41:58 PM

Thanks for the quick reply. Somewhat out of my expectation. It actually measures alright the 2nd time. Here are the measurements.

Terminal
1 - 74.6
2 - 164.6
3 - close to 0
4 - 164.4
5 - 77.7
6 - close to 0
7 - 99.8
8 - 0
9 - 102.2
10 - close to 0
11 - close to 0
12 - close to 0
13 - 164.6
14 - close to 0
15 - 183.2
20 - close to 0
21 -202.9

Now checking TRS...

Title: Re: Help needed... Spark when making voltage check with Speedball
Post by: hwaitung on August 02, 2014, 09:28:41 PM

All working finally. Thanks again Doc B.!

Here are some photos...

(https://fbcdn-sphotos-b-a.akamaihd.net/hphotos-ak-xpf1/t1.0-9/10524728_10152454601924504_6751239187672223296_n.jpg)

(https://scontent-a.xx.fbcdn.net/hphotos-xpf1/t1.0-9/10565085_10152469618454504_4199192757775638399_n.jpg)

Title: Re: Help needed... Spark when making voltage check with Speedball [solved]
Post by: Doc B. on August 03, 2014, 04:32:00 AM

Though it may seem like it by reading some posts here, often as not when you short a couple of pins together no damage occurs. So it's always worth checking voltages first to see if anything broke.