Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: oers83 on February 04, 2018, 03:27:32 AM

Title: Voltage Check
Post by: oers83 on February 04, 2018, 03:27:32 AM

hey,

I'm from germany (I used the 235V-245V transformer settings) and hadn't any problems assembling the crack

-resistance check ok
-the LEDs are on
-both tubes glow, the small on not very bright but it glows
-the crack plays music

but the voltage check gave me really different results from the ones in the pdf

1 90V
2 0V
3 170V
4 0V
5 90V

6 170V
7 65V
8 170V
9 65V
10 170V

should I be concerned?
and do I need to fix this?

Title: Re: Voltage Check
Post by: Paul Birkeland on February 05, 2018, 10:07:17 AM

Quote from: oers83 on February 04, 2018, 03:27:32 AM

-the crack plays music

but the voltage check gave me really different results from the ones in the pdf

Please do not use/listen to an amplifier that isn't working.  It hasn't passed its voltage checks!  This is not safe.

Quote from: oers83 on February 04, 2018, 03:27:32 AM

1 90V
2 0V
3 170V
4 0V
5 90V

6 170V
7 65V
8 170V
9 65V
10 170V

should I be concerned?
and do I need to fix this?

Considering terminal 3 is the chassis and you have +170V there, yes, you should be concerned.  Terminals 6 and 10 are also grounded and show this high voltage.

Generally I find that weird readings like this come from the junction of the black wires on the headphone jack not being all the way soldered together, but it's odd that your high voltage terminals are reading 0V.  This I suppose could also happen if you had the ground probe of your meter connected to the wrong terminal and all your readings are negative voltages.

Again, please do not use/listen to this amp until these issues are resolved.

-PB

Title: Re: Voltage Check
Post by: oers83 on February 06, 2018, 03:36:30 AM

hey,

thanks for your reply

I'm not sure where I messed up but I remeasered and without chancing anything everything is fine now