In most cases, germanium transistors can be replaced with modern general-purpose silicon bipolar transistors with no modification to the circuit. Reasonable silicon replacements for small-signal NPN and PNP germanium transistors are 2N3904 and 2N3906, respectively.
Spare Electronic Parts has new, new old stock, and obsolete transistors, fets, jfets in stock, including hard to find germanium transistors used in restorations, projects, and effects pedals. We also have new old stock ECG and RCA SK transistors in stock and ready for delivery
NPN wideband silicon germanium RF transistor 11. Legal information 11.1 Data sheet status  Please consult the most recently issued document before initiating or completing a design.  The term 'short data sheet' is explained in section "Definitions".
Sep 11, 2013· Germanium vs. Silicon Transistors. September 11, 2013; Overdrive/Distortion, Technical; One facet of the design process here at Keeley Electronics comes down to selecting not just the highest quality components for use in our pedals, but …
Germanium diodes have forward voltage drops between 0.2 and 0.3 volts. The 2N3904 transistor is a silicon transistor, so you can expect a forward voltage drop in the range of 0.5 to 0.7 volts. If the transistor you are testing is in a circuit, you will need to remove the transistor from the circuit board.
Dec 05, 2009· But NPN silicon are awesome perfect modern transistors. Silicon of all types are generally great most of the time. Here's the thing about the Silicon vs. Germanium sound... nearly any Silicon circuit can be tuned to sound as good as its Germanium equivalent, it's just a matter of designing the circuit to be optimized to the silicon's spec.
May 25, 2019· The silicon transistor has shown much greater resistance to heat than its germanium counterpart. There was an initial problem in the production process of the silicon transistor, however. Raw silicon has defects in its crystal structure that would interfere with the functioning of a transistor.
NPN wideband silicon germanium RF transistor 5. Limiting values  Tsp is the temperature at the solder point of the emitter lead. 6. Thermal characteristics Table 5. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter Conditions Min Max Unit VCBO collector-base voltage open emitter - 10 V
new silicon and germanium bipolar transistors available from stock at Silicon-ark.co.uk An ever growing selection of both silicon and germanium bipolar transistors.Golden Oldies, Collectables, and modern.OK, so there is some really weird stuff here, but if you …
ColorSound™ ToneBender™ (Mark II Professional) This is the classic, vintage ColorSound™ ToneBender™ Mark II Professional.There are the three variations of the Mark II Professional.Options are to build it with PNP or NPN germanium transistors or with NPN silicon transistors
Apr 17, 2018· Both silicon and germanium can be combined with other elements called dopants to create solid-state electronic devices, such as diodes, transistors and photoelectric cells. The primary difference between silicon and germanium diodes is the voltage needed for the diode to turn on (or become "forward-biased").
Welcome to a legend. The Dallas-Arbiter Fuzz Face has been around since 1966, and it shows no signs of dying any time soon. Through this design's past you'll find all kinds of different variations in the basic original circuit, from PNP Germanium to NPN Silicon, and …
Caution: Observe precautions when handling because these devices are sensitive to electrostatic discharge NPN SILICON GERMANIUM RF TRANSISTOR NESG250134 NPN SiGe RF TRANSISTOR FOR MEDIUM OUTPUT POWER AMPLIFICATION (800 mW) 3 …
Yes, germanium was the only material used in transistors from when they were invented in 1947 until 1954 when the first successful silicon transistor was made.
The main difference between germanium and silicon transistors in switching circuits, be they either PNP or NPN transistors is that VBE for small germanium is about 0.3 volts whilst those of silicon are about 0.7 volts. Also germanium are more sensitive to heat than silicon and can end up in thermal runaway and destroy themselves.
Next, we can select the type of semiconductor material, either Germanium, Silicon, or GaAs. Since the 1N4148 is a silicon diode, we can leave the material field at its default value of "Si". The next parameter to be entered is the rated current.
NPN SILICON GERMANIUM RF TRANSISTOR NESG270034 NPN SiGe RF TRANSISTOR FOR MEDIUM OUTPUT POWER AMPLIFICATION (2 W) 3-PIN POWER MINIMOLD (34 PKG) Document No. PU10577EJ02V0DS (2nd edition) Date Published December 2007 NS FEATURES • This product is suitable for medium output power (2 W) amplification P out = 33.5 dBm TYP. @ V CE = 6 V, P in
1 Original Tungsram AC176K NPN high gain Germanium transistor. These work great in fuzz pedals. Gain ranges from 50-250. These are untested and sold as/is, but if you need a matched pair or even just one piece tested, I can do that for $3 per transistor.
A bipolar junction transistor (bipolar transistor or BJT) is a type of transistor that uses both electrons and holes as charge carriers.. Unipolar transistors, such as field-effect transistors, only use one kind of charge carrier.BJTs use two junctions between two semiconductor types, n-type and p-type.. BJTs are manufactured in two types: NPN and PNP, and are available as individual ...
Apr 02, 2011· Germanium tends to be a bit softer and warmer than Silicon, but Silicon tends to maintain attack and be less "mushy". Germanium also tends to be lower in gain than Silicon, and most Germanium transistors are less stable. Germanium is usually used for more vintage type stuff, and Silicon for a more modern type sound basically (if that helps).
A very broad selection of transistors are available from ntepartsdirect.com
The Germanium Transistor version and The NPN Silicon Transistor version layouts both have a 10k trimmer (R5T) that is not shown in the schematic. We believe this is a worthy addition to the circuits, giving you more options for the ultimate sound you want.
The demand for non-leaky, temperature-stable NPN devices of consistent gains was one of the factors that drove germanium out of the picture in favor of silicon. The result is that, today, there are large, fairly dependable supplies of old-stock PNP germanium on which I can draw.
NPN wideband silicon germanium RF transistor 1.4 Quick reference data Table 1. Quick reference data  Tsp is the temperature at the solder point of the emitter lead.  Gp(max) is the maximum power gain, if K > 1. If K < 1 then Gp(max) = Maximum Stable Gain (MSG). 2. Pinning information Table 2. Discrete pinning 3. Ordering information Table 3.
Jun 14, 2012· NPN Silicon Fuzz Face - Germanium Emulation ... The reason why people opt for PNP germanium fuzz is because the transistors are much more consistent than the NPN equivalents. If you're using silicon emulating germanium, then why use PNP silicon transistors that will need you to have a positive ground when there is no benefit in doing so when ...
Bipolar Transistor Basics In the . Diode. tutorials we saw that simple diodes are made up from two pieces of semiconductor material, either silicon or germanium to form a simple PN-junction and we also learnt about their properties and characteristics.
NPN SILICON GERMANIUM RF TRANSISTOR NESG270034 NPN SiGe RF TRANSISTOR FOR MEDIUM OUTPUT POWER AMPLIFICATION (2 W) 3-PIN POWER MINIMOLD (34 PKG) Document No. PU10577EJ02V0DS (2nd edition) Date Published December 2007 NS FEATURES • This product is suitable for medium output power (2 W) amplification. P. out = 33.5 dBm TYP. @ V. CE = 6 V, P. in
Jun 29, 2018· This "mixed breed" amplifier was used in a Magnavox console stereo in the late 60's when there were PNP power germanium and NPN power silicon transistors at reasonable cost. I thought it would be ...