Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: Ony on May 07, 2014, 11:47:21 PM

Title: Resistance check [solved]
Post by: Ony on May 07, 2014, 11:47:21 PM

Hi, just finish to solder everything on my Crack and I made the resistance check:

Terminal  Resistance Measured  Resistance Manual
1                             *                               *
2                             *                               *
3                        0 ohms                       0 ohms
4                             *                               *
5                             *                               *
6                             *                        2.4K ohms
7                      2.9K ohms                2.9K ohms
8                        0 ohms                      0 ohms
9                     2.9K ohms                 2.9K ohms
10                          *                         2.4K ohms
12                          *                          0 ohms
13             * NOT climb slowly     * will climb slowly
14                          *                          0 ohms
20                          *                          0 ohms
22                     0 ohms                      0 ohms

B3                  2.9K ohms                  2.9K ohms
B6                  2.9K ohms                  2.9K ohms

RCA jacks:
Ground lug            *                          0 ohms
Center pin             *               90K ohms—100K ohms

You can see in red, the value measured different from the manual, do you have any clue? thank you

Title: Re: Resistance check
Post by: Paul Birkeland on May 08, 2014, 07:02:34 AM

I'd start with why the outside of the RCA jacks don't measure 0 Ohms.

They are wired together with a black wire, which goes up to the volume control, then connects to the rest of the circuit.  Are the two lugs on the volume pot with black wires coming off of them wired together?

Title: Re: Resistance check
Post by: Ony on May 08, 2014, 07:41:22 AM

You right, the wire who link the plot to the headphone out had a bad soldering on the plot side.

My ground are at 0 Ohm on the headphone output and 6 & 10 at 2.4 kOhms.

12 at 0 Ohm
13 rising
14 at 0.8 Ohm
20 at 0.8 Ohm

Everything seems solved, thanks :)

Title: Re: Resistance check
Post by: Ony on May 08, 2014, 08:33:10 AM

Voltage check is done, the crack works fine  :)