H&G Amplifiers

H&G Amplification is an manufactory that designs and manufactures music amplifiers, speaker cabinets and boutique guitar effect pedals.

29/03/2016
by H&G Amplifiers
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LM386 Overdrive Effect

LM386 overdrive: easy, cheap, and fast to make. This is known and popular audio amplifier circuit with a fairly simple but good sounding overdrive guitar effect. Neither the operation of the complex.

LM386 Overdrive Guitar Effect

LM386 Based overdrive guitar effect

BS170 mosfet guitar signal to the already worsened. the R8 potentiometer regulates the amount of signal to the 386. If you have more than that the chip can handle, then the signal will be distorted. That is, the “overdrive“. So it is quite dry and rough sound. And of course it’s good for us. Listen to:

 

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12/02/2016
by H&G Amplifiers
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Peppermill guitar overdrive

 

We like to test the effects of different circuits, in addition to its own development. So we found a simple, few parts built in guitar Overdrive circuit. The first stage is a 2N7000 or BS170 MOSFET, J201 JFET the second circuit. The J201 Drain voltage is 4.5V. The R9 potentiometer to adjust. Variations may be a little higher voltage softer, low voltage rought the voice.

Peppermill guitar overdrive schematic. Remind one driven guitar amp. With J201 JFET and 2N7000 MOSFET.

Peppermill guitar overdrive

Some portions of the circuit is different from the original. Example C1, C2, C3 capacitor value. But that does not noticeably affect the sound.

For more information, please visit the original site:

http://www.runoffgroove.com/peppermill.html

16/01/2016
by H&G Amplifiers
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Muff Booster test

The simple Muff Booster. This is a very simple circuit distorting project. Surely many people familiar with the legendary Electro Harminix from Big Muff guitar pedal. Many famous guitarists among almost as standard tools. this circuit, only a part of the original. One distortion segment. The electronic parts type of not sensitive, feel free to experiment with different types transistors and diodes, so a little bit different sound can be produced.

The diodes and transistor should be placed in a socket to be easily and quickly replaced. We tried out the following components: 2N2222, 2N5088, 2N3904, 2N2222, BC108 transistors and 1N914, 1N4148, red LED, 1N34 germanium diodes. The diodes to number want change , symmetrical, asymmetrical way to connect.

The EHX Big Muff segment circuit. Muff Booster guitar distortion.

The Muff Booster circuit

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11/01/2016
by H&G Amplifiers
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High voltage tube guitar preamplifier with 12AX7

 

The high voltage tube guitar preamplifier project is an adaptation of the famous tube preamplifier to suit the DIY’ers demands. Searching the net, I’ve never come across similar idea, so I decided to share this version of our very popular design. This a classic, conservative design, that easily matches other musical devices.
The preamp contains one channels of real-tube, high-gain circuit. This circuit uses JJ ECC83 (12AX7) tubes. Circuit uses a stabilized 12V DC voltage.

High voltage tube guitar preamplifier

High voltage guitar preamplifier circuit

 

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25/11/2015
by H&G Amplifiers
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High voltage DC to DC converter

 

This is a simple 555-based high voltage inverter circuit. The high voltage DC to DC converter is suitable for small current (a few mA) but requiring high voltage electronics. For example Nixiu display, VFD, or a other vacuum tube circuit. We will use a tube guitar pre-amplifier.

 

High voltage dc to dc converter, NE555 timer ic and IRF740 mosfet based circuit.

HV DC DC converter circuit

The C3 capacitor high voltage type! Min 250V.

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17/11/2015
by H&G Amplifiers
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Low voltage tube preamplifier

 

It is a low voltage tube preamplifier, specifically guitar preamp. Uses 12AX7 or ECC83 tube. No complicated circuit. The circuit is similar to the famous old guitar amplifiers bright channel. Low voltage operation, does not require a separate anode and output transformer.

 

Low voltage tube preamplifier circuit.

Low voltage tube preamp.

 

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14/11/2015
by H&G Amplifiers
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DC to DC converter

 

This circuit is the old and well-known NE555 integrated circuits based. DC to DC circuit is not complicated, little parts, and doing pretty much stable voltage. It produces with the 12V DC voltage of 30V to voltage. The NE555 constant operating frequency is set. The 3 pin voltage convert of 30V. D1- D4 and C1-C5 voltage tripler circuit.  DC to DC converter is use in similar tube circuit.

 

DC to DC converter schematic, used 555 ic.

DC to Dc converter schematic