2N2925 DATASHEET PDF

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Should be 2NA not 2NA The background noise is almost gone after replacing the 2N transistors on the reverb board.

2N2925 Datasheet PDF

Users browsing this forum: The only issue I saw when testing the board at work was that there was a 1 volt increase in signal voltage out of the second 2N stage right after the input stage when I used the 2NA transistor.

Jan Tue 05, 4: Transistor substitutes 2N sub found Posted: Also if I still have some noise I will have to replace the 2N transistors in the solo and accomp mixing preamps and the complex voice preamp.

What I wonder is this. It is the 2NA and I happened to find some in my stash.

In most cases it didn’t seem to make a whole lot of difference. Just looked and I can bypass the reverb board far as the audio signal is concerned.

This is a Conn model organ. May Thu 26, 2n22925 I’ll post the picture of the schematic in the main restoration topic viewtopic. PDF 2N data http: I used to work on organs quite a bit, years ago. I can check it as the output of the reverb amp that drives dahasheet reverb tank has a measurement point where a DB reading is listed.

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Can you scan that section to share? After a ,long while I decided to tackle the noise issue. I found a suitable sub for the 2N Previous topic Next topic. Makes it harder to find out why the 16′ bass isn’t working as I was hoping it was a bad transistor. Page 3 of 3.

Made a mistake for the transistor number. Watch out for the fact that those have different pinouts! Given these transistors just amplify the audio signal I am thinking any suitable sub will work ok. Oddly enough it doesn’t seem to affect anything and honestly I think the reverb is better now, but that function is never used.

Jan Tue 05, 2: Could the 1 volt increase just be what the normal signal level was when the organ was new? If I wanted to do away with the reverb board completely how could I derive the 28Vdc?

2N Price & Stock | DigiPart

Mouser don’t know when they will get the Xatasheet back in stock, but a NTE is a suitable sub and since this is just used to regulate the rod bias I feel comfortable in using that one. Still have a little noise that changes with the expression pedal setting which is after the post amp board so I will replace the three transistors on it for good measure. What brand of organ is this? I will need to do a test to see if the gain is unity or very close to unity as the reverb board sends the signal through one transistor and takes t he signal from the emitter and applies it to the emitter of the 2n925 transistor on the board to allow the clean signal to pass through.

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Transistor substitutes 2N sub found. So it looks like I may only need one transistor on the post amp board which is the 2N as the other two on that board form a turn on delay that mutes the audio while the rest of the organ comes up.

Books Support This Site: How much difference would that make if I just replaced all the 2N with the 2N? May Mon 09, 4: Transistor substitutes update Posted: Which section do you need to see? Looks like perhaps I could use a 2N Anything related to the above.

Dec Mon 31, 3: Baldwin liked to use those 2Ns, mostly “green” but occasionally “orange” as well.