I need help to test a few parts

[Peavey 100 series classic]

All I have is a multimeter
https://photos.app.goo.gl/Z9d1CpHdqSWT4vTm8
Here is a data sheet for the part
https://www.google.com/url?sa=t&sour...VWssf737WtZeV4

When I look into testing this part on Google it says

1. Test Mode:
   Switch your multimeter to diode test mode, which measures the voltage drop across a diode.
2. 2. Remove from Circuit:
   Take the transistor out of the circuit to get accurate readings.
3. 3. Base to Emitter:
   • Place the positive probe of the multimeter on the base (B) of the transistor.
   • Place the negative probe on the emitter (E).
   • A good NPN transistor should show a voltage drop between 0.45V and 0.9V.
4. 4. Base to Collector:
   • Keep the positive probe on the base (B).
   • Move the negative probe to the collector (C).
   • A good NPN transistor should show a voltage drop between 0.45V and 0.9V.
5. 5. Reverse Polarity:
   • Switch the probe positions and repeat the tests.
   • A good NPN transistor should read "OL" or no reading in the reverse direction.
6. 6. Collector to Emitter:
   • Place the positive probe on the collector (C).
   • Place the negative probe on the emitter (E).
   • A good NPN transistor should read "OL" or no reading.
   • Switch the probes and repeat; the same should apply.

When I perform this test with the red probe on the base I read OL on both sides and when I put the negative on the base I read Ol on the emitter and .60 on the collector.

Let me know for sure that I done a proper test and weather that my transistor is bad or not..

[g1]

When I look into testing this part on Google it says the collector is the left lead, the base is the middle lead, and the right is the emitter lead

That is incorrect. Always download a legit datasheet and check there.

[Peavey 100 series classic]

That is incorrect. Always download a legit datasheet and check there.

Thank you I found one and updated the original post.. I take from your reply that you agree with the test directions.. I redone the test, everything reads .604 and OL when I swap to the black lead.. let me know that would be a good transistor or not I don't really understand the rest of the data sheet..
Edit considering I've got four and they all read the same thing and you cleared out the test directions in your reply, I'm gonna take that you do agree with their instruction, my test shows they are good, and move on to post the next part I need help with..

[Peavey 100 series classic]

https://photos.app.goo.gl/vzJqBLJ1GUkABtZj9
Let me know that this is a proper method..

To test a 2N3904 transistor, you can use a multimeter in diode test mode. Connect the positive probe to the base of the transistor and the negative probe to the emitter. The multimeter should show a voltage drop of around 0.6 V. Next, connect the positive probe to the collector and the negative probe to the emitter. The multimeter should show a higher voltage drop, indicating that the transistor is working properly.

[Peavey 100 series classic]

https://photos.app.goo.gl/kxAXsEov6usQRQsG7

The transistor I have in that spot is a j111 transistor, when I look into it SEL is not a known code for a transistor..

[x-pro]

Previously, a similar thing has already been written here.
Perhaps you are a good specialist in another field of activity.
Therefore, use a part of your fee from this activity and give the device to the appropriate repairman. Otherwise, you will lose a lot more time and, most importantly, money “repairing” it yourself, without initial knowledge.

[g1]

As I mentioned in your other thread, you can replace every part and still have a problem if it is a bad connection. Meanwhile real damage can be done by unnecessary soldering, disassembly, etc.

Find bad components by troubleshooting. You will need proper test gear and knowledge to do so. If you want to practice or learn about part testing, get a junk board from the dump or something cheap at the thrift shop. Then you can practice soldering as well, and not risk causing any issues to your amp.

[J M Fahey]

All I have is a multimeter
https://photos.app.goo.gl/Z9d1CpHdqSWT4vTm8
Here is a data sheet for the part
https://www.google.com/url?sa=t&sour...VWssf737WtZeV4

When I look into testing this part on Google it says

1. Test Mode:
   Switch your multimeter to diode test mode, which measures the voltage drop across a diode.
2. 2. Remove from Circuit:
   Take the transistor out of the circuit to get accurate readings.
3. 3. Base to Emitter:
   • Place the positive probe of the multimeter on the base (B) of the transistor.
   • Place the negative probe on the emitter (E).
   • A good NPN transistor should show a voltage drop between 0.45V and 0.9V.
4. 4. Base to Collector:
   • Keep the positive probe on the base (B).
   • Move the negative probe to the collector (C).
   • A good NPN transistor should show a voltage drop between 0.45V and 0.9V.
5. 5. Reverse Polarity:
   • Switch the probe positions and repeat the tests.
   • A good NPN transistor should read "OL" or no reading in the reverse direction.
6. 6. Collector to Emitter:
   • Place the positive probe on the collector (C).
   • Place the negative probe on the emitter (E).
   • A good NPN transistor should read "OL" or no reading.
   • Switch the probes and repeat; the same should apply.

When I perform this test with the red probe on the base I read OL on both sides and when I put the negative on the base I read Ol on the emitter and .60 on the collector.

Let me know for sure that I done a proper test and weather that my transistor is bad or not..

More proof that AI (artificial intelligence) is actually AD (artificial dumbness)

I used to fear a Terminator like future.

Now I see Terminator will be very busy trying to eat some sardines without opening the can, instead of conquering the World.

[Tom Phillips]

https://photos.app.goo.gl/vzJqBLJ1GUkABtZj9...Connect the positive probe to the base of the transistor and the negative probe to the emitter. The multimeter should show a voltage drop of around 0.6 V. Next, connect the positive probe to the collector and the negative probe to the emitter. The multimeter should show a higher voltage drop, indicating that the transistor is working properly.

Note that this is just a basic confidence test. If a transistor fails this test then you can be assured that the transistor is bad.
If the transistor passes this test, it may still have faults that affect the operation of the circuit. Such faults include excess noise, out of spec gain etc.

[Peavey 100 series classic]

Note that this is just a basic confidence test. If a transistor fails this test then you can be assured that the transistor is bad.
If the transistor passes this test, it may still have faults that affect the operation of the circuit. Such faults include excess noise, out of spec gain etc.

Thank you very much.. due to the cost to have multiple replacements for each transistor being equal to the cost of a proper tester, I am probably gonna replace them whether they are bad or not..

I would appreciate it if you would confirm that I have found a proper replacement for this transistor, I found a replacement for every other one on a Peavey cross reference sheet..
Transistor
558 N channel JFET

Replacement
2N5458 N Channel to 92 JFET transistor