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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: ()

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When mounted in the case the heat sink is quite close to the speaker, so one possibility is that speaker movement helps in cooling. I understand that this will set the bias between the two transistors at three diode voltage drops. Hope this information is of use to someone. Might have some problems in reality that yo’d have to compensate, dqtasheet.

SSGuitar has moved to the curve theme!

PN3564 Datasheet, Equivalent, Cross Reference Search

Almost, but not quite. Well, that’s just too bad. My only comment aside that and the issue 2 catasheet the dtaasheet of Without compound you leave microscopic air pockets in between. 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 December 01, The emitters and base are connected with wire wrapped around the pins and the other end laying on a trace, both ends soldered of course.

Receives feedback from the output across the emitter resistors through R22 and Dayasheet Good thing I was suspicious before I built it and wasted the parts.

Everything else is so perfectly symmetrical with this circuit that this seems to stand out like a sore thumb, but I don’t know what to make of it other than to assume Q5 needs more voltage gain than Q6 for some reason.


The second amp is reversed in this regard. I’d say forget this circuit.

I don’t understand that – during the early s Electro-Harmonix would sell you the amp in kit form, so I would think there would be at least some dated before You will definitely need a preamp to compensate that issue.

Since there are two of them the amp is symmetric.

Well, it does if you replace the input transistors with FETs that do not need a DC bias but guess what: Both boards are secured to the control plate with the board mounted pots. I replaced them with 75 volt units just because it was easy to do since I had the board out anyway and it is a real pain to get the board out.

How can the base of Q6 be more negative i.

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

The wood strips used for mounting the back panel are stapled to the sides of the back. It does get warm to the touch during operation. The bases of input transistors shoud be biased to a proper DC potential – I don’t see it happening.

Just make sure the compound is dataaheet electrically insulative. I want to perfboard build a clone of the entire amp, but I would hate to datadheet out that the schematic is wrong. There are quite a few other connections made with wire soldered to the top of traces.

2N3568 Datasheet, Equivalent, Cross Reference Search

I guess I could tweak it to work but why bother since it’s practically a redesign of the whole thing. The asymmetric version of this input-VAS combination was pretty common before long-tailed pair input became as common choice it is now. Well, I run another sim: I was getting together a parts list to build this amp when I noticed something that got me to thinking.


I’m quite sure the original circuit was meant to be something like this. Everything else is “loose” with a few wires bundled with a plastic tie. Well obviously an input amp.

This is the trace area of the board underneath the heat sink. However, information on this amplifier is criminally rare, and this thread has some of the best discussion to be found. The speaker has been removed to provide some extra room to work with. This seems pretty low. Please login or register. I suppose someone did a hack job drawing this thing out.

I got this one from musicparts. Since the 2N is in a TO case and rated for 50 watts with a 2N complement it makes some sense since they may have to provide more current to drive less than 8 ohms of the single speaker versions.

The thought was – is it really necessary to ground the heat sink? This is the insides. I really hope it’s the latter. July 30, How can the base of Q5 be more positive than it’s emitter when there is no source of a positive voltage at its base?