Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: Colin on April 09, 2016, 05:53:53 PM

Title: Crack + Speedball Smoked [resolved]
Post by: Colin on April 09, 2016, 05:53:53 PM

Hi everyone, I need help(again).
My crack+speedball get smoked(on 270 R psu ) and smelted.

When turn on, started from tubes glowing and then 'very glowing' on 6 leds(small pcb 2 x 2 and 12au7 2), the big pcb not glow(sometimes has glow(2 led) a moment and then turn off again and sometimes only glow 1 led)

And after 'very glowing' moment, it's slowly goes glowing normal again in 2 pcb led(4), and the 12au7(2) automatically turn off.

Here is the voltage check :
1 1v
2 29v
4 28v
5 2v
7 0v
9 0v
13 28v
15 93v
21 0v

Every suggestion is very welcome and thanksfull.

Thank you,
Colin

Title: Re: Crack + Speedball Smoked
Post by: fullheadofnothing on April 11, 2016, 06:58:05 AM

You have incorrectly mounted your TIP-50 transistors. Re-read the instructions on page 15 and fix the error.

Title: Re: Crack + Speedball Smoked [resolved]
Post by: Colin on April 16, 2016, 10:02:01 AM

Thank a lot. The problem already gone. 😊