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| Amplifier on site |
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| New Amplifier Board |
HIFI Esprit Enthusiasts
Showing posts with label 12AX7. Show all posts
Showing posts with label 12AX7. Show all posts
Wednesday, 30 September 2020
Monday, 5 November 2018
EL34 Push Pull Amplifier triode connection prototype DIY
EL34 amplifier prototype
Description:
StereoTube power amplifier.
Tube complement: eight 12AX7, four EL34.
Configuration: EL34 connected in Push Pull triode configuration
Output power: 15W
Frequency response: 10Hz–30kHz, ±0.2dB
Input sensitivity: 1000mV for rated power.
Rated load impedance: 8 ohms.
Damping factor: 11 at 1000Hz
Thursday, 5 July 2018
Thursday, 22 February 2018
My PCB GY50 Evolution Power Hybrid Amplifier
Here my new circuit boards about Aloia's amplifier GY50.
Thursday, 29 September 2016
Monday, 30 May 2016
Monday, 28 December 2015
EL84 Guitar amplifier new release
New release of our 18W Guitar amplifier, Made in double layer proponete circuit board.
3 x 12AX7
2 x EL84
Selectable Marshall style or Fender like tone stacks
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| EL84 and 12AX7 on PCB |
Thursday, 22 October 2015
Saturday, 10 October 2015
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!!
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
Monday, 21 September 2015
18W EL84 - GZ34 Tube 12AX7 Guitar Amplifier Project
Guitar Head Amplifier 18W using EL84 pentode and old style octal GZ34 rectifer
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| 18W Marshall Style Amplifier |
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| Chicken Head Knobs |
Tuesday, 16 June 2015
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..
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