EspritAudio EL84 Guitar Tube Amplifier Protototype

First Classic Guitar  vacuum tube amplifier from ESPRITAUDIO

First prototipe on PCB is done!!!

Custom Power Transformer suitable for My GY50 Hybrid Power Tube Amplifier 4 x 12AX7 + BJT Power Stage

Custom power Transformer  for my GY50 hybrid Amplifier clone is ready!!

Trasformatore Alimentazione Hi Fi 300VA 

Primario 230Vac

Secondari:
1 x 230Vac x anodica
2 x 67Vac x stadi finali BJT
2 x 12.6vac x filamenti 12AX7

Schermo elettrostatico primario/secondari

Soundmachines NS1nanosynth portable analog modular synthesizer integrated Arduino platform USB connectivity

ESPRITAUDIO
presents:

soundmachines

Analog Synthesizer 

NS1nanonsynth

ns1nanosynth

"We at soundmachines thought about a simple and cheap platform that will transport the main characteristic of a modular analog synthesizer in a small and friendly format, to be well recognised by musicians,  makers and tinkerers worldwide. A small, but  loyal to its roots, instruments of sound creation. With a digital platform added as a bonus."
                                                                                                    from NS1nanosynth creator

Tutorial Vodeos:

VCO VCF VCA

18W EL84 - GZ34 Tube 12AX7 Guitar Amplifier Project

Guitar Head Amplifier 18W  using EL84 pentode and old style octal GZ34 rectifer 

18W Marshall Style Amplifier

Chicken Head Knobs 

DIY DC/DC Dual Boost regulated Power Supply for High Voltage Tube VAS

In relation to DIY Hybrid amplifer the first step is to obtain the High Voltage for tube's anode supply and the low voltage for heaters.

Sometimes, if not always, fora a 100W amplifier you have a double sec 150-300VA  36-0-36Vac power transformer only.
Using this board you can adjust the  needed voltage for tube stage starting from your transformer.
Without use any voltage doubler and linear regulators.

The Following image shows how the Double Boost works.

From unregulated  +55/0/-55Vdc the circuit gives at his output the needed voltage, able to supply the anode current for a tube stage.

For example you can obtain +90/0/-90Vdc and 6.3Vdc for the heaters..