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I found a suitable sub for the 2N May Mon 09, 4: Makes it harder to find out why the 16′ bass isn’t working as I was hoping it was a bad transistor. In most cases it didn’t seem to make a whole lot of difference.

Small Signal Transistors

Watch out for the fact that those have different pinouts! I used to work on organs quite a bit, years ago. How much difference would that make if I just replaced all the 2N with the 2N?

If I wanted to do away with the reverb board completely how could I derive the 28Vdc?

2N Datasheet, Equivalent, Cross Reference Search. Transistor Catalog

Anything related to the above. Transistor substitutes update Posted: Just looked and I can bypass the reverb board far as the audio signal is concerned.

It is the 2NA and I happened to find some daasheet my stash. Made a mistake for the transistor number. Could the 1 volt increase just be what the normal signal level was when the organ was new?


Dec Mon 31, 3: 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.

Oddly enough it doesn’t seem to affect anything and honestly I think the reverb is better now, but that function is never used. May Thu 26, 6: The only issue 22n2925 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.

2N2925 Datasheet PDF

Given these transistors just amplify the audio signal I am thinking any suitable sub will work ok. PDF 2N data http: Books Support This Site: This is a Conn model organ. Should be 2NA not 2NA The background datashete is almost gone after replacing the 2N transistors on the reverb board. Can you scan that section to share? 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.

Jan Tue 05, 4: Users browsing this forum: Jan Tue datasheet, 2: Transistor substitutes 2N sub found. What I wonder is this. Mouser don’t know when they will datasheef the MPS 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.


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

GESS 2N Series Datasheets. 2N, 2N, 2N Datasheet.

Baldwin liked to use those 2Ns, mostly “green” but occasionally “orange” as well. Page 3 of 3. What brand of organ is this? Transistor substitutes 2N sub found Posted: After a ,long while I decided to tackle the noise issue. I’ll post the picture of the schematic in the main restoration topic viewtopic. Previous topic Next topic.

Looks like perhaps I could use a 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.