ABSOLUTE MAXIMUM RATINGS (Note 1). Maximum Temperatures. 2N/8/9. Storage Temperature. °C tOo+°C. Operating Junction Temperature. Part, 2n Category, Discrete. Description. Company, Central Semiconductor Corporation. Datasheet, Download 2n datasheet. Cross ref. Similar parts. Page 1. Adams Avenue, Hauppauge, NY USA. Tel: () • Fax: ()

Author: Bakus Gahn
Country: Guinea-Bissau
Language: English (Spanish)
Genre: Love
Published (Last): 6 January 2012
Pages: 285
PDF File Size: 12.57 Mb
ePub File Size: 7.23 Mb
ISBN: 257-1-11123-573-1
Downloads: 98530
Price: Free* [*Free Regsitration Required]
Uploader: Mazuzil

Q5 and Q6 also have to work as a phase inverter for the push-pull drive to Q7 and Q8.

After registering necessary to view the schematicI was surprised at how the power amp was almost identical!! My only comment aside that and the issue 2 is the gain of July 02, Logged ryansteele Chipper Posts: Q7 and Q8 had me confused until I realized the only way it could dafasheet work was push-pull Class A.

2N3568 데이터시트 PDF 검색 결과

Did you miss your activation email? June 25, Without compound you leave microscopic air pockets in between.

From Q7 through Q12, the circuit is identical. Good thing I was suspicious before I built it and wasted the parts. Hello, Please forgive me resurrecting such an ancient thread. So I’m assuming right now that I can find a suitable substitute using the 2N characteristics.


The output transistors and heat sink. If you say theory and practice don’t agree you haven’t applied enough theory. Notice the and dates.

2N Datasheet(PDF) – New Jersey Semi-Conductor Products, Inc.

One of these is built using transistors with the obscure EH numbering in one section, and normal labelled parts in the other. I’m quite sure the original circuit was meant to be something datasheet this. Everything datasheeet is “loose” with a few wires bundled with a plastic tie. Yes, the transistors are original and still working fine and I won’t be replacing them.

I will be replacing all of them, and routing the AC lines separate from the others.

Help me understand this power amp design – please?

This cap, as well as C21 are 35 volt caps. Chalk it all up to very good luck, but it’s not just “my opinion”. I’m sure that the small size helps, but it is a very sturdy case. I got this one from musicparts. Q11 and Q12 is a complementary Class B output stage. This is the trace area of the board underneath the heat sink. I replaced them with 75 volt units just because it was easy to do since I had the board out anyway datasheft it is a real pain to get the board out.

The trace under the screw to the upper left connects to the output capacitor C July 30, Both boards are secured to the control plate with the board mounted pots. There is no “chassis grounding” cap on the primary AC side, just the 1 amp fuse and switch. The purple wire is one of the speaker connections. Just to prove my suspicions about this circuit that looks a bit messed up right I draw the damn thing on spice and ran a sim I felt it appropriate to add further information regarding the transistors used in the EH Mike Matthews Freedom Amplifier here for this reason.


Air is a very good insulator of heat, which is very bad. The six TO transistors and the two TO-3s make up the power amp. The preamp and power amp are combined onto the larger board. The circuit also has less than unity gain.

I guess I don’t understand why that would lead to instability. I have much more confidence in this circuit actually working.

This seems pretty low. In fact, some copper mounting clamps that attach transistors to the heatsink may serve as a wondeful supply rail.