Tsakiridis Devices Apollo 'plus' Service manual

APOLLO OPERATING MANUAL
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TSAKIRIDIS DEVICES - TUBE AUDIO AMPLIFIERS
Operating manua
Apo o ‘p us’
reference
monob ock power amp ifier

APOLLO OPERATING MANUAL
_______________________________________________________________________________________
______________________________________________________________________________
TSAKIRIDIS DEVICES - TUBE AUDIO AMPLIFIERS
©2009
A rights reserved
TSAKIRIDIS DEVICES
AUDIO AMPLIFIERS
Aristomenous 12 Str,
T.K. 10440, Athens, GREECE
Te : 210 8253132 / Fax: [phone]
[e-mail]
www.tsakiridis-devices.com
Distributed in the
UK & Ire and
by
ikon audio consu tants
www.ikonaudioconsu tants.com
info@ikonaudioconsu tants.com

APOLLO OPERATING MANUAL
_______________________________________________________________________________________
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TSAKIRIDIS DEVICES - TUBE AUDIO AMPLIFIERS
©2009
A rights reserved
Declaration of Conformity
Tsakiridis Devices
Aristomenous 12 Str,
T.K. 10440
Athens,
GREECE
Dec are that the product described in this owner’s manua is comp iant with the
technica standards:
EMISSIONS EN 55103-1:1997
IMMUNIT EN55103-2:1997
Tests Procedure
Vo tage Dips, Interruptions EN61000-4-11: 1994
Harmonics EN61000-3-2: 2000
Surge EN61000-4-5: 1995
Conducted Emissions EN55022: 1998
Radiated Emissions EN55022: 1998
ESD EN61000-4-2: 1995
Conducted Immunity EN61000-4-6: 1996
Radiated Immunity EN61000-4-4: 2004
EFT EN61000-4-4: 2004
F icker EN6100-3-3: 1995
Dr. Tsakiridis Odysseus
Tsakiridis Devices
10/2006

APOLLO OPERATING MANUAL
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TSAKIRIDIS DEVICES - TUBE AUDIO AMPLIFIERS
©2009
A rights reserved
Contents
1. Introduction
2. Insta ation
3. Specia Notice
4. Amp ifier Top
5. Amp ifier Back
6. Warranty
7. Specifications
8. Re-biasing Procedure

APOLLO OPERATING MANUAL
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TSAKIRIDIS DEVICES - TUBE AUDIO AMPLIFIERS
©2009
A rights reserved
1.Introduction
Thank you for your purchase of this TSAKIRIDIS DEVICES Apo o amp ifier.
We are very proud of our products and fee sure that it wi bring you many years of audio
p easure and that ike other high qua ity audio products, it wi be a va ued possession for
you and for future generations of music overs.
We come to the Apo o Amp ifier! This manua introduces you to its key features, and
exp ains how you can take advantage of its superb sound in your system. P ease retain
this book for reference.

APOLLO OPERATING MANUAL
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TSAKIRIDIS DEVICES - TUBE AUDIO AMPLIFIERS
©2009
A rights reserved
2. Connection and Installation
• To prevent fire or shock hazard, do not expose this unit to rain or moisture.
• Dangerous vo tages inside. Do not open the amp ifier cabinets. There are no user
serviceab e parts inside. Repairs shou d be carried out by qua ified service
personne on y.
• Take care to hand e the power cord carefu y and not to crimp or damage it as this
can cause e ectric shock or damage the device.
• Do not insert any objects into the amp ifier.
• To insta the device, se ect an open p ace with good venti ation. The amp ifier
shou d be p aced so that the va ves (vacuum tubes) are a ways vertica .
• The amp ifier operates with a ternating current vo tage 240 VOLT, 50 HZ. Before
connecting power check that the required supp y vo tage corresponds to your oca
AC supp y. If a different vo tage is stated, do not connect the amp ifier to the mains
power, and seek advice from your dea er / distributor.
• Never pu the power cab e from the cord.
• Connect to the mains power using a high qua ity mains cab e.
• A ways disconnect the amp ifier from the mains power before connecting or
disconnecting any of the input or oudspeaker cab es.
• Never expose the device direct y to the sun or attempt to operate it outdoors.
• Do not p ace the amp ifier near radiators or other sources of heat and genera y
avoid p acing the device in an adverse environment.
• A va ve amp ifiers need time to reach their optima operating temperature. We
recommend, therefore, that you a ow at east fifteen minutes for the amp ifiers to
‘warm up’ before use. Warming up shou d be done with the vo ume contro (on the
pre amp ifier) set to zero, with no signa passing to the power amp ifier.

APOLLO OPERATING MANUAL
_______________________________________________________________________________________
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TSAKIRIDIS DEVICES - TUBE AUDIO AMPLIFIERS
©2009
A rights reserved
3. Specia Notice
 Do not p ace the amp ifier near each other whi e in operation because the
magnetic fie d emitted from the power supp y can cause noise and adverse y
affect audio p ayback qua ity.
 Never change the position of the amp ifiers during operation and wait for 20
minutes after powering off before moving, because of the high vo tages that
remain in the amp ifier.
 Do not touch the va ves during operation – serious risk of being burned!
 The ifetime of the tube is 7,000 hours for Apo o and after this time rep acement is
necessary.
 After use, a ways a ow the amp ifiers to coo down before re-starting (2 minutes
shou d suffice).
 Do not operate the amp ifier without a oad (speaker cab es attached) as this can
cause damage to the amp ifiers.

APOLLO OPERATING MANUAL
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TSAKIRIDIS DEVICES - TUBE AUDIO AMPLIFIERS
©2009
A rights reserved
4. Amp ifier Top
• On the top and front of the amp there are two switches.
• The eft switch se ects the percentage of feedback. In the rear position (the switch is
nearest to the transformers) a ows ow feedback and the front position (the switch is
furthest from the transformers) is norma feedback.
• The right switch chooses the operating mode of the pair of output tubes. In the rear
position (the switch is nearest to the transformers) the output tubes operate at triode
operation and in the front position (the switch is furthest from the transformers) they
operating at 50% triode and 50% pentode mode (U tra inear).

APOLLO OPERATING MANUAL
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TSAKIRIDIS DEVICES - TUBE AUDIO AMPLIFIERS
©2009
A rights reserved
5. Amp ifier Rear
• The ON/OFF switch is at the rear.
• Connections (inputs and outputs) are at the rear of the amp ifier.
• A ways disconnect the amp ifier from the mains power before connecting or
disconnecting any of the inputs or oudspeaker cab es.
• Use the best possib e qua ity input cab es and oudspeakers interconnect cab es.
P ease consu t your dea er or distributor for advice.
• See diagram on the fo owing page.

APOLLO OPERATING MANUAL
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TSAKIRIDIS DEVICES - TUBE AUDIO AMPLIFIERS
©2009
A rights reserved

APOLLO OPERATING MANUAL
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TSAKIRIDIS DEVICES - TUBE AUDIO AMPLIFIERS
©2009
A rights reserved
6.
Warranty
TSAKIRIDIS DEVICES offers a five-year (5) warranty for a its app iances from the date
of purchase. (proof of purchase wi be required, so p ease retain your receipt).
Technica support is provided by the manufacturer, however if you require support for
your product, in the first instance p ease contact your rese er or distributor to exp ain the
symptoms. They wi advise on the best course of action.
If the amp ifier needs to be returned for service or repair, p ease use the origina carton
provided. P ease inc ude a note detai ing your name, address, your phone and a brief
description of you symptom and events surrounding the ma function / comp ication.
Type: Apo o
Seria number:
Surname:
Name:
Address:
Location:
Posta Code:
Emai :
Phone number:
Date and p ace of Purchase:
We advise owners to retain a the packaging throughout the ifetime of the product – it
shou d be used when / if moving home and returning products for service / repair.
P ease note that unauthorised a terations or modifications wi inva idate the warranty.
This warranty does not include the valves which are subject to wear as discussed
above.
A transport costs for warranty items is to be borne by the customer and is not the
responsibi ity of the manufacturer or distributor. P ease consu t the distributor in case of
uncertainty.
In the event that damage has been caused to the amp ifier which fa s outside of the
terms of this warranty, from de iberate or unintended case of intervention by third parties
sha cease to app y security and the ho der sha bear the costs of parts and abour.

APOLLO OPERATING MANUAL
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TSAKIRIDIS DEVICES - TUBE AUDIO AMPLIFIERS
©2009
A rights reserved
7.Specifications
Power output
Pentode Operation
Triode Operation
90 Watt (6550)
56 Watt (6550)
Harmonic Distortion
1 Watt / 40 Hz
1 Watt / 1 Khz
1 Watt / 20Khz
10 Watt / 40 Hz
10 Watt / 1 Khz
10 Watt / 20Khz
0.41 %
0.40 %
0.80 %
0.84 %
0.50 %
1.80 %
Intermodulation
(60 Hz / 7000 Hz R=1/4)
1 Watt
10 Watt
2.20 %
5.10 %
Frequency Response
1 Watt / -3dB
10 Watt / -3dB
20 Hz – 20 Khz
5 Hz - 76 KHz
7 Hz – 71 KHz
< 0.2 dB
Rise Time 4 µS (10 KHz)
Signal / Noise 85 DB
Input Impedance 100 ΚΩ
Output Impedance 4 / 8 Ω
Input Sensitivity 350 mV R.M.S.
Power Supply nergy 300 Jou e
Power Consumption 400 Watt
Weight 20 kg
Dimensions (WxDxH) 27x43x22 cm
Please note
i. The measurements given above are per channel
ii. Technical specifications are subject to change without notice.

APOLLO OPERATING MANUAL
_______________________________________________________________________________________
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TSAKIRIDIS DEVICES - TUBE AUDIO AMPLIFIERS
©2009
A rights reserved
8. Re-biasing procedure
This procedure is required when changing or rep acing the va ves.
Required instruments:
1. A mu timeter capab e of measuring direct vo tage eve to approximate y 300m.V.
D.C.
2. Ohmic oad approximate y 8 OHM / 10 WATT (can be used and the speakers,
subject)
3. A sma p astic screwdriver - straight.
Set-up process
 Connect the amp ifier to be configured with ohmic oad (no po arity) or the
speaker).
 Connect the ine input of the amp ifier to the preamp, but switch off the preamp.
 Connect the negative po e of the mu timeter to the b ack connector of the speaker
output (-) and red eave for an hour incoherent.
 Activate the amp ifier (CAUTION are dead y currents during operation of the
amp ifier, which persist even after the power supp y from the network).
 Take the red probe (of the mu timeter) and p ace in binding post behind the tube
we want to regu ate.
 Measure the vo tage, the indication must be 200 mV + / - 10 m.V. for the EL 34
and 250 m.V. + / - 10 mV for KT88 or KT 6550 as we increase the id ing current as
the amp ifier goes from c ass AB to c ass A, but with reduced ife without audib e

APOLLO OPERATING MANUAL
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TSAKIRIDIS DEVICES - TUBE AUDIO AMPLIFIERS
©2009
A rights reserved
improvement. Since the aboratory is adjusted in the Apo o 200 mV which
trans ates into a cathode current 20 mA.
 Repeat for each Monob ock unit.
I = U/R
where:
I is the cathode current in mA
U is the vo tage measured with the mu timeter to mV
R is the resistance of cathode (the Appo o amp ifier is 10 OHM).
 Adjust the current of each tube with the p astic screwdriver the corresponding
variab e resistor (trimmer) ocated right or eft respective y.
 Waiting 5-10 minutes and repeat the above two steps, if necessary make a
adjustments.
 The setup process is finished.
CAUTION
Very high levels of electrical current operate inside the amplifier, which may
continue for many hours after the power supply is disconnected from the mains.
CAUTION
Only trained personnel should open and service this amplifier.