Sound - tube amplifier. Stereo lampochnik 2x5 Tues of old TVs. Part 2.

<b>Sound</b> - tube amplifier. Stereo lampochnik 2x5 Tues of old TVs. Part 2.

      Lamp idyll-2



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              VALVE Idyll


         Splinter/3NC spc for IG # 9


                 Part II


   Hello, readers mnogouzhazhaemye
magazine "Info Guide". I continue the story
about how you can make yourself neplo
hoy tube amplifier of sound cards from
old TVs. At this time I'll
about the postamplifier.

   Immediately noticed that the TV does not Liabilities
flax should be "Spring", the unit can be
from any TV, the main thing - it must
be assembled on a lamp 6P14P or on similar
Gah - 6P15P, 6P18P or best option
6P43P. We also need sound
transformers and iron building, with a maximum
anomalously large wall thickness. Option
placing the amplifier in one unit otni
met less time, but if you try
Our lampochnik as dual mono, the sound will be
better. First of single-block version. In
as a single-block I used body
from the tape "Lighthouse 232" pre-
flicking from it all and sheathing his sheet
aluminum, 1.5 mm thick.

   Housing is conveniently divided into 2 parts, and
one that more is okonech
LIMITED amplifier and to a lesser - preliminary
LIMITED. Those who decided to make a body itself
by yourself, I recommend separate parts
under the amps, as between pre-and okonech
nickname, and between channels, the vertical
deaf walls.

   Now, a few basic rules
installation. Lamp is very picky to the conduction
Ladies and fear interference. It is therefore necessary
followed when installing some related
with this rule.

   The first - with a mass of wires must be
as short as possible and thicker. Weight vestimo
neutral wire, or rather negative on the 250v,
necessarily thrown on the amplifier.
Power connection to the body better to do
in several distant months
max, wire cross-sections from 1.5 to 2 mm. Not
directly connected to board about
the same wire at the closest point correlation
Busan. To make better use of the compounds
special washer with a tail for soldering. A
those, in turn, firmly screwed to the
the amplifier.

   Rule vtoroe.Provod the output trans
must also be thin. Suitable acoustic
cally in silicone, with a thickness of 1 mm. A
input wire to the board shall be filed
a coaxial (shielded) cable.
You can not use very thick antenna
LIMITED.

   With this all. Proceed directly
to the assembly. In addition to the boards and transformers
we still need 4 resistors 5 W 2.2
kilooma and 2 capacitor 100 mF x 160 V.

   The rear panel connectors to place
power output terminals and sockets for the WMO
Yes. Entrances and exits to spread from one
each other's way. The same is true for Pi
Tania, especially 6v. Jacks and connectors can be
place approximately as follows:



    In. Out. 250v 6v


    O O



   To enter the suit RCA jacks or the like
they are called in the people - the tulips. Exit
become a regular speaker terminals. There is not
is very perverted, since the power
signal is not great and does not require doroguschy
gold-plated terminals.

   Under the power to establish similar protection
generalized terminal as a source. And be
caution: Do not confuse power wires
when connected, it is dangerous to life!

   Front panel issued upon his
taste. However, stick with what's there
should be 2 to 1 variable resistor
MEGA (very hard to find, if not removed from the
like the TV) and switch pita
of 250v. Someone may even be able conditions
tanovit level indicators 8).

   Now you can install inside to
rpusa boards, audio transformers, and more
one fee, which must make itself
yourself. However, the fee is not complicated and not
time-consuming. Putting on a bed
mass plate design from prigotov
lennyh resistors to 2.2K, about this
form:



     - --- X - -

    ! ! !

    ! ! !

    x --- x - x-

    ! ! !

    oh oh oh

     A 250v B


   In the center put together all 4 resistors and
make contact pad for the feeding
250. At the edges, too connect resistors
in parallel and make the contact pads.
The appointment of this board - the creation of the current for
the screening grid our pentodes. It
so called tube used by us
however, in television, and thus in ours,
scheme pentodes work in tetrodnom inclusion
Research Institute.

   Now everything can be assembled into the case and,
Armed with 40-watt well sharpened
soldering iron, solder marks the PIC 61, a brush
and flux LTI-120, light-colored rosin
and acetone, the whole thing solder.

   At first place in the body transformation
mator, somewhere right next to
connectors output. Pay attention
attention to the windings. Those with a wire
column - a weekend and install turn
terminals of this winding to the terminal output
signal. If everything is set firmly, then
You can solder it all. Take the cooked
wire in silicone, put on the ends Kembo
Riki from vinyl chloride or shrinking labor
CRB, bare ends of the flux and lubricates
Solder the output terminals of the transformer
connector, observing the same polarity
between channels.

   After clearing the adhesions from rosin and fluence
sa surface with acetone and dress Kembrey
ki. On the supply terminals tubing is not needed.
Wire length should be minimal, but
not in the preload, but sufficient for accurate
laying on the bottom of the case.

   Now set all three boards. In
this case, you must apply rack
that the board were at a height of 5-10 mm
from the bottom of the case. After that, begin to collect
Since the scheme. Circuit board contains a transitive
Store, we will not use, but fell
ivat it can not. Take a thick wire in
silicon and solder it to one end
primary winding of the transformer and other
to 250 at the terminal. Then, the second contact
Solder the transformer to the anode of the lamp.
The same make with the second channel. Socle
Lev lamps shown below, are soldered to
board can be a soldering lamp socket,
and in those places, where possible, to contact
pads on the board, coupled with the necessary
leg lamp track.

   Then payaem to the source of the grid current,
which we collected the resistive wire
napryazheiya 250, again taken from the terminals,
and the output from the power wires to throw
Shielding grid lamp.Posle which leads
You can tie the ties.

   Negative contact power the most demanding
a way must be connected to a thick and
short wire from the amplifier.
All other product minus connection
are found to the case of special washers.
It is known that 40% of noise in the amplifiers (and
not only) are due to insufficient
conductivity (high resistance) of
conductor "body" or "mass".

   Anode circuit is connected to the mass of this
chain is represented capacitor and resistor
rum, a conclusion which is connected to the anode,
and the other to ground. Mass dress better soybean
Dinh with the body in several places.

   To connect the input circuit, we require
buetsya shielded wire. Input signal
signal is transmitted to the foot 2 lamp, on the driving
YUSCHUYU grid in one volume on the resistors
front panel of the scheme:



     to grid


 b o C = 1mkF

 a o o c

    input weight


   If the resistor is turned to us to handle
to adjust the pins down, the contacts
a, b, c will be in order from left
right.

   Wire input is not desirable
placed close to other wires.

   Voltage of 6 volts is applied to contacts
4 and 5, the lamp is the filament. It is not necessary
flatter myself a little stress and le
drink to glow thin wires, the current there is
large and thin wire can easily
melted.


   That is, in principle, and all. Can be establishes
vat lamps and listen. However, it is still on
pick up the lamp on identical parameters
amplification. The lamp has one drawback. She
eventually goes down, that is, the emission becomes
UIS cathode. And as subsidence worsens
gain. We need to pick up
lamp of the same this option. And
in this case do not need instruments, it
can be done by ear, it suffices to establish
vit volume to maximum, and if the difference
to strengthen the will - you'll hear it.

   And yet. The lamp 6P14P, 6P15P, 6P18P and
6P43P slightly different frequency settings
Based on this, do not install
different lamps, except for experiment
8). Lamp power reduced from 43P to 14P.
However, more than 10 watts even from 43P us to squeeze
will not succeed.


   A few words for those who wish to collect
power in different cases. I am the way,
two hands for this option, but due to
complexity focused on single-block. For
Build an amplifier in the two buildings you need to
will produce two boards of the current source
accelerating setki.Na each of two resistors
pa, connected in parallel. Resistors are
same and connected in the same way.


   That's it. Now bring the scheme of the lamp and
bid you farewell until the next room, where
will be considered Tube EQ
available tubes 6N1P. Recommend reserves
stis six standard sockets
lamps 8).



   All the best.

   _S_p_l_i_n_t_e_r_


                  *



   Pinout lamp 6P14P



         7

                 7 - Anode

           9 9 - Screening Mesh

     2 === 2 - Control grid

       === 3 - Cathode

       /-_3___ 4,5 - filament



     May 4



   Template for a single-cycle UMZCH



    _____

    ___ / 3-5 W



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