Hello.
Today I want to tell you how to do do it yourself real lamp head.
If anyone does not know, guitar amplifiers can be divided into 2 types:
1) Combo amplifiers (There is already a speaker in the case immediately).
2) Heads (From English Head). They require a column called a guitar cabinet.
We’ll talk about the latter today.
I will not argue which of these species is better. In my opinion, each of them has its advantages and disadvantages.
Assembly and photos of comrade G1KuL1N, from the forum.
So, let's start with the scheme
In the diagram we can see the standard pre-amplifier, on 12AX7 dual triodes. And the output stage, which is made on the EL84. Everything is simple, as is often all a tube.
For the power supply, any transformer is required that has a voltage of secondary windings of 275-0-275V and a power of at least 60 watts (of course, more can be). Of course, the current is about 100 - 120 mA.
For installation, the printed circuit board was divorced. And made by LUT technology. Laser-ironing technology, consists in translating the design of a printed circuit board printed by a laser printer on glossy paper. On textolite, by heating the toner with an iron.
All resistors have a power of 0.5 W, and in the final stage 5 W.
The chassis is bent from a sheet of metal. Then the holes are drilled.
Output transformer Yerasov TV20, 10 throttle Henry
If you want to achieve a lack of background, you need:
- Firstly, achieve sufficient shielding. Ato can even “catch” the radio.
- Secondly, do not neglect the advice and make the earth a “star” (this is when all the ground wires are connected at one point and do not form spurious circuits).
You will also need a front panel that can be made in various ways. From silk-screen printing to laser engraving and the like ...
All you need is to find, or make a template (for example, in Corel Drav).
And of course, savvy.
The next topic will be about how to do it yourself body for our lamp head.