#Ac128 transistor pdf
#Ac128 transistor mods

Of course if you want to use wires, you still can. And it gives you a very sturdy board support within the enclosure, so no need for dodgy nylon supports anymore. Again this significantly speeds up the assembly of the board. The DIY Effects fuzz PCB has holes setup so that you can use PCB style Alpha pots instead of the regular lug type. The other time-consuming (and error-prone) part of wiring a stomp box is the potentiometers.We’ve all spent much longer than that cutting and stripping 9 wires to wire one up normally, so this is a godsend. This makes the wiring of the off-board stomp 3PDT switch a 30 second job. The PCB has been designed to use DIY Effects ‘stmp’ switch and ribbon combo.The PCB features a spot for an optional trimmer to aid in deciding where the ‘Bias’ pot ‘centers’.In fact, SLW prefers to call this control “Bias”, because that’s exactly what it is. This will tweak the waveform distortion characteristics. The ‘More’ control plays with the voltage on the top of the second transistor, which in effect changes the bias. ‘Less’ or what I decided to call ‘Load’ (even though SLW nor I can decide on what to call it) acts upon the input.

#Ac128 transistor mods

It has options for the other Fuller Mods namely the ‘Less ‘ and ‘More’ pots.

It has options for a couple of caps that can help reduce hum and soften the distortion a little.

(See the ‘B’, ‘V’ and ‘A’ holes on the partially assembled picture below). Secondly with the recommended transistor sockets, (and the jumper sockets I added) you can switch between silicon/germanium or NPN/PNP in about 30 seconds. Firstly this means you can use NPN and PNP depending on your set of transistors. You simply place a jumper where you need it to be.

A nice quiet power supply section that offers positive and negative ground.

It’s a FuzzFace circuit that has many great features: The electrical specification of each of this three AC128, 2N2905, and BC337 are the same, but AC128 is the transistor made with germanium material but 2n2905 and BC337 will be made with silicon material.ĭue to silicon and germanium material contradiction, the temperature and packaging are way different.Over the last few weeks I’ve had the privilege to assist SLW over at DIY Effects on a new PCB offering. The comparison table explains to you about electrical specifications of AC128 vs 2N2905 vs BC337, this will us an idea about each of these transistors. The AC127 transistor is the complementary transistor for the AC128 transistor, both of them are combined to form many audio-based applications. The electrical specs and physical characteristics of all the transistors are the same, so we can easily replace them with an AC128 transistor. The transistor such as 2n2905, 2n4032, 2n3109, bc337, NKT275, and bc108 are the equivalent for AC128 transistors.

#Ac128 transistor pdf

If you need the datasheet in pdf please click this link AC128 transistor equivalent The junction temperature of -55 to +75℃, the germanium material-based device had a lower temperature capacity than silicon material. The transition frequency is 1MHz, the frequency limit of the AC128 transistor is higher. The current gain of the AC128 transistor is 55 to 175hFE, the amplification capability of this transistor is high, this is due to they are outdated model germanium semiconductor transistor devices. The power dissipation of the AC128 transistor is 700mW, the TO-1 transistor package had a great influence on the power dissipation. The collector current is 1A, the current values are moderate as a transistor device.

The voltage specs of AC128 transistor are collector to base voltage is 32V, collector to emitter voltage is 32v and emitter to base voltage is 10V, the voltage specs show that AC128 is a transistor used for audio applications. In this section, we try to explain the electrical specifications of the AC128 transistor, this helps explain the application description. AC128 transistor specification and application description The TO-1 is made with an outer metal cover and they had a circle shape, they are been mainly used for old audio applications. The component package used for the AC128 transistor is TO-1, it is an old type transistor package mainly used for amplifier transistors. The collector is the output of the transistor The base is used to trigger the transistor The emitter is the input of the transistor.