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May 20, 2019, 11:40:00 am

Author Topic: A few questions for the Resistance Checks  (Read 266 times)

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Offline luckme10

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A few questions for the Resistance Checks
« on: January 02, 2019, 06:07:42 pm »
I've done a resistance check with my multimeter:
term   resistance 2k, Default settings( 2v Resolution 1 ohm)      
1   0.003      
2   no reading, infinite, etc   
3   0.001      
4   0.004      
5   001 at 2k ohm setting   2.2 at 200 ohm setting
6   36.6b at 200 ohm setting   
   
8   0      
10   no reading      
11   0.001      
12   0.02      
13   0      
14   no reading      
15   001 at 2k ohm setting   2.2 at 200 ohm setting
16   36.1 at 200 ohm setting   
   
18   0.004      
20   no reading      
21   0.002      
22   no reading      
23   no reading      
24   no reading      
25   0.4      
26   no reading      
27   no reading      
28   0.001      
29   0.04      
30   no reading      
31   0.001      
32   no reading      
33   0.001      
34   0.001      

From what I can gather, the terminals in question are 5,6, 15 and 16.

Based on the manual these should be the results:
terminal   ideal Resistances
1   0
2   *
3   0
4   0-100
5   2.2k
6   * (could read around 25KΩ)
8   0
10   *
11   0
12   0-100
13   0
14   *
15   2.2k
16   * (could read around 25KΩ)
18   0
20   *
21   0
22   *
23   *
24   *
25   0
26   *
27   *
28   0
29   0
30   *
31   0
32   *
33   0
34   0

I also installed a pair of Dayton 100.uf 250v 5% in place of stock 100uf 250v capacitors. Could this contribute to resistance differences in terminal 5 and 15?

I think I need to get a new multimeter. I'm not even sure if mine  is capable of getting 2.2k ohm readings. But its says on the site that it's capable of getting a resistance of Resistance: 0-2M ohm. Ohm setting is 2k so I guess that means its max is 2000 ohms.
http://www.armadatech.com/sites/default/files/sites/all/files/Pro30%20Manual.pdf [nofollow]

Summary:

I guess in regards to the 5 and 15, I'll wait until picking up a new multimeter before continuing the investigation.

In regards to 6 and 16, the numbers are consistent. Would it be ok to ignore the discrepancies between the potential 25 ohms it says it could read and what I have until I do a voltage check?

Lastly, I had to replace a wire on 1L but I had trouble putting it back in after trying to take out all the solder i could. Can I put it in the 1U slot instead?
« Last Edit: January 02, 2019, 08:42:47 pm by luckme10 »

Offline Paul Birkeland

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Re: A few questions for the Resistance Checks
« Reply #1 on: January 03, 2019, 04:53:05 am »
Can you recheck your resistances with your meter on the 200K scale?

If terminal 1 measures 0 ohms, it's very important that you not attempt to power up your Crack.  It may also help to post some photos of the build.

-PB
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline fullheadofnothing

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Re: A few questions for the Resistance Checks
« Reply #2 on: January 03, 2019, 06:14:39 am »
Uhhhh, this isn't a Crack, it's a Crackatwoa...

Terminal one is on the ground buss and is the ground point for the volume pot. 5 &15 are the oddities here, looking like it's a problem with the resistors on the headphone jack or the ground connection there.
Joshua Harris

I Write the Manuals That Make The Whole World Sing
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Offline Paul Birkeland

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Re: A few questions for the Resistance Checks
« Reply #3 on: January 03, 2019, 09:09:20 am »
Uhhhh, this isn't a Crack, it's a Crackatwoa...

Oops!  Good call. 
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man