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2N2925 Datasheet, Equivalent, Cross Reference Search
Mouser don’t know when they will get the MPS back in stock, but a NTE is a datasneet 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.
Could the 1 volt increase just be what the normal signal level 2n22925 when the organ was new? Previous topic Next topic. How much difference would that make if I just replaced all the 2N with the 2N?
Books Support This Site: Transistor substitutes 2N sub found.
Which section do you need to see? 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. Can you scan that section to share? Makes it harder to find out why the 16′ bass isn’t working as I was hoping it was a bad transistor.
May Thu 26, 6: Dec Mon 31, 3: May Mon 09, 4: Anything related to the above. Jan Tue 05, 4: I can check it as the output of the reverb amp that drives the reverb tank has a measurement point where a DB reading is listed.
If I wanted to do away with the reverb board completely how could I derive the 28Vdc?
I used to work on organs quite a bit, years ago. Baldwin liked to use those 2Ns, mostly “green” but datashwet “orange” as well. Page 3 of 3.
After a ,long while I decided to tackle the noise issue. Just looked and I can bypass the reverb board far as the audio signal is concerned.
2N Datasheet(PDF) – Micro Electronics
Transistor substitutes 2N sub found Posted: Watch out for the fact that those have different pinouts! Oddly enough it doesn’t seem to affect 2b2925 and honestly I think the reverb is better now, but that function is never used.
What brand of organ is this? Users browsing this forum: I’ll post the picture of the schematic in the main restoration topic viewtopic.
2N Price & Stock | DigiPart
Should be 2NA not 2NA The background noise is almost gone after replacing the 2N transistors on the reverb board. I found a suitable sub for the 2N 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 last transistor on the board to allow the clean signal to pass through.
Jan Tue 05, 2: Made a mistake for the transistor number. Transistor substitutes update Posted: What I wonder is this. 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.
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.