Yerasov GTA-15 User manual
GTA-15
Tube guitar combo amplifier
User manual
CONTENTS
1. ........…………………………………………...................................1
2. ………………………………………………………........2
.....…..…………..………………………………….........................2
..… …………………………………………....................3
3. ……........………..…………………………………….…….3
4. ..................................................……................................4
5. ..……......………………………………….....................4
6. …….…...…………………………………………..............................4
7. ………………………………………….................................................5
Precautions
General information
Top panel
Rear panel. ..............
Operating Instructions
Troubleshooting
Technical Specifications
Delivery
Guarentee
Allow the amp to warm up for a few minutes before playing.
Allow the amp to cool for a few minutes before moving.
Do not store or use the unit in a damp environment.
Do not place the device in direct sunlight or near a heater.
When connecting to a power supply, make sure that its voltage
matches the requirements of the unit. The socket must be also
be earthed.
In the event of a fire, unplug the power cord of the unit.
If the appliance is not used for a long period of time, it must be
disconnected from the power supply.
Before replacing the valves, make sure that the appliance is
disconnected from the power supply.
Avoid touching the hot valves.
Protect it from shocks.
The unit requires good ventilation.
Do not use solvents to clean the cabinet, use a clean, dry cloth.
1 . PRECAUTIONS
1
2.GENERAL
The top panel
2
The GTA-15 is a compact 15 watt CLASS A/B valve guitar combo
amplifier, which gives a clean, warm and rich sound.
Exceptionally easy to use, combined with the possibility of obtaining a
clean and warm overdriven tube sound at sensible volumes.
Sound is a huge advantage of the 15-watt model . Speaker 10”.
The new model has several advantages over its predecessor. Along
with having a line level input for external preamp the GTA-15 has
significantly reduced background noise, especially when used at low
volume. The volume control is smoother and more gradual, also the
circuit uses film capacitors WIMA, and the output valves are of higher
quality. The Power on and off switch is made by the French firm APEM
for more reliability. The model GTA-15J12 uses12" speaker Jensen
C12R. The amplifier uses valves 2x 12Ax7(2xECC83), 2x EL84.
1- ON / OFF - The power switch.
2- LED power indicator.
3- TONE - tone control, allows you to alter the top mid and high frequencies.
4- VOLUME - volume control simultaneously adjusts the volume and
sensitivity of the channel. In the initial position the sound remains clean.
As the volume is increased the amp moves smoothly into creamy overdrive.
5- LINE INPUT - line-in jack for connecting an external preamp.
6- GUITAR INPUT - input jack for connecting an electric guitar.
123 4 5 6
1-Power Cord.
2- Fuse
3- Jack built-in speaker or external cabinet 8-ohm.
4- Output valves 2xEL84
5- Pre amp valves 2x12AX7 (2xECC83)
Rear panel
3.
OPERATING
3
Plug the cord into the guitar jack socket INPUT. Turn the power switch to
ON. When the LED lights wait 30 seconds for the valves to warm up
before playing.
1345
4. TROUBLESHOOTING
4
5. SPECIFICATIONS
In some cases, you may encounter problems such as noisy valves, howling
and internal valve faults. All valves have a finite lifespan. If problems occur
it may be easily rectified by replacing a valve. A faulty valve may be
identified by knocking the valve body which may exhibit extra noise. But be
aware that some noise when knocking a preamp valve can be a natural
phenomenon. When a pre amp valve (12AX7) fails it should result in
continuous microphonics.
The simplest solution is to replace a faulty valve with a known good one.
Sometimes it is enough just to change valve places.
The faulty valve may be removed when cold by using a gentle circular
motion after nun plugging the amp from the mails.
Always install a serviceable valve.
6. DELIVERY
.. ..........................Guitar Combo Amplifier GTA-15 units ..... ........................................ 1
AC fuse (spare) T0, 5A, units ......................................................................................1
Operating instructions, .................................................................................................1
Container packing, items .............................................................................................1
Input resistance, MOhm .................................................................................1
Output power, W, ......................................................................................15
Powered by a 50 Hz, in ......................................................................220 ± 22
Power consumption, W, not more .................................................................50
Weight (net), kg, not more ............................................................................12
Lamp ................................................................2xEL84, 2x12AX7 (2xECC83)
Speakers: (GTA-15C) ................................................... Celestion G10Vintage
(GTA-15E) ..................................................................Eminence Legend 102A
(GTA-15J) ...................................................................................Jensen C10Q
(GTA-15J12) ................................................................................Jensen C12R
5
7. GUARANTEE
Warranty period 12 months from the date of purchase.
During the warranty period, the owner is entitled to a free repair.
Caution: In the absence of the warranty card and the receipt of purchase
the warranty period will be calculated from the date of manufacture of the
product.
Warranty does not cover:
- Products that have mechanical damage;
- Violation of the consumer operating conditions;
- In the case of self-repair or modify.
* The valves included with the product are a consumable product and the
warranty on them is for 1 month from the date of receipt of the product.
Combo amp
Ser. Number ___________________
Date of manufacture_____________
(Filled by the manufacturer)
Combo amp
Ser. Number ___________________
Release Date __________________
TCI representative _______________
--------------------------------------------------------------
(Fill-trading company)
Sale Date ______________________
Seller _________________________
Stamp shop ____________________
GTA15______________
GTA 15______________
YERASOV MUSIC CORPORATION
www.yerasov.ru e-mail: sale@yerasov.ru
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