Resistance Check on 52

Emoreigns · 577

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Offline Emoreigns

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on: April 29, 2024, 06:52:31 AM
Good Morning,

My build on the BeePre has been going pretty smoothly up until now- I made it to the resistance check on page 52, but have come to a stop here. I am not getting any reading with my meter for either of the resistance checks- It is just showing the 0L reading, which I believe means the circuit isn't completed?  There are some joints that are not soldered yet, so perhaps those are the problem? My multimeter works fine for testing resistors, so I don't believe that it is the problem. I've attached a couple pictures. I appreciate the help as always! Am I just overlooking something here?

~Happy Listening


Offline kgoss

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Reply #1 on: April 29, 2024, 02:50:35 PM
0L is actually over limit. If you don’t have an auto ranging meter you need to increase the range to one greater than the resistance you are measuring. To test your meter just measure a known value resistor out of the circuit and see if you get the correct value. Just be aware the value you read might not be exactly right because of part tolerances. But it should be very close.

Ken Goss


Offline Emoreigns

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Reply #2 on: May 01, 2024, 06:18:55 AM
Thanks Ken-

The value for A1 and A4 are supposed to be 445 ohms each- So I had my multimeter set to 4000- I(t goes 400,4000,40000) So anyways, the A1 terminal is right on 445 ohms, but I wasn't getting a reading on A4. I took your advise and cranked it up to 40000k and now it is reading 25.03-

It was getting late when I soldered this, and I've already found a couple joints that weren't soldered that should have been. Thanks for the tip on the meeting though- I knew it was something simple, but just couldn't put my finger on it. Still very much a soldering noob-  Hopefully I can find what the issue is tonight-


~Happy Listening


Offline Paul Birkeland

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Reply #3 on: May 02, 2024, 01:40:00 PM
You may just need to crimp the unsoldered ends of those resistors down a little bit may help pull that reading into spec.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline Emoreigns

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Reply #4 on: May 05, 2024, 05:06:41 AM
I crimped those resistors down as best as possible- Still not getting a proper reading… still not reading at 4000, and coming in at 25.0 on 40000 ohm setting. My readings seem steady elsewhere.

« Last Edit: May 05, 2024, 05:08:25 AM by Emoreigns »

~Happy Listening


Offline Paul Birkeland

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Reply #5 on: May 05, 2024, 06:51:22 AM
The purpose of this resistance check is to be sure that the 330 Ohm resistor goes in the correct spot and doesn't get swapped with one of the 130 ohm resistors.  Since we can see that your 330 ohm resistor is in the correct spot, I would go ahead and continue with the build.  I suspect that as you complete that section and have all those terminals soldered up that you will end up with the correct resistance readings. 

-PB

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline Emoreigns

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Reply #6 on: May 06, 2024, 05:34:19 AM
Ok Great Paul-

That was my gut instinct a few days ago, but I figured it best to consult with the experts and make sure I hadn't made a glaring mistake, or was going to damage something-

Thanks for the help as always- I will update at the next voltage/resistance check or completion to confirm that those values came into spec.


~Happy Listening


Offline Emoreigns

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Reply #7 on: May 10, 2024, 08:02:51 AM
Morning Paul,

I continued on per our last conversation until I came to the voltage test- I didn't want to power up before confirming that is OK to proceed.

The A4 & B4 terminal values are still off- A4 is still reading at 25 @ 40k and B4 was reading 80 @ 400k-

There are still some unsoldered wires on 9 and 15 I believe, but I'm not sure if that is the issue or not...

Thanks for all the help!

~Happy Listening


Offline Paul Birkeland

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Reply #8 on: May 11, 2024, 07:08:48 AM
You can clip the black probe of your meter to terminal 26 to make these measurements and that should rule out the other stuff upstream.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline Emoreigns

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Reply #9 on: May 11, 2024, 01:43:32 PM
Ya, still coming back with issues when the black probe is attached to 26. B1 was good right at 445- But B4 still was coming back 80.0 @ 400k setting. Not sure what to make of this-

~Happy Listening


Offline Paul Birkeland

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Reply #10 on: May 11, 2024, 03:08:49 PM
Can you verify the resistance of the 130 ohm resistors?  You should be able to just measure across them with your meter with no 300B in the socket.

Also verify that the resistor attached to B4 is reading correctly.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline Emoreigns

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Reply #11 on: May 13, 2024, 02:32:22 PM
The 4-130’s are reading 117.2-117.8

B4 is 218 measured the same way

~Happy Listening


Offline Emoreigns

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Reply #12 on: May 15, 2024, 07:38:28 AM
Does this tell you anything Paul? These values seem to be correct, and double checking it looks like I've got all the resistors in the right spots. I just cant figure out why my resistance readings are so off...

~Happy Listening


Offline Paul Birkeland

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Reply #13 on: Yesterday at 04:50:45 AM
If you can measure the 330 ohm resistor while it's mounted in the kit and it measures correctly, then try to measure that resistance across the terminals it's mounted to.  Does that resistance appear at those terminals?  Now try this for each of the 130 ohm resistors.  At some point, you will get a resistance reading on a resistor that doesn't agree with the resistance reading between the two terminals it's mounted to, and that's an indication of a soldering issue or a broken lead.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man