Nagra 300 Series Instruction Manual Download | Manualshive

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12

Nagra –

300i / 300p

Operating the amplifier

Front panel

1.

VFS platform

2.

LED (light emitting diode) and modulometer intensity adjustment

3.

Modulometer

4.

Modulometer function selector

5.

Volume potentiometer

6.

Fine left / right level balance

7.

Input selection (display on LED A to D)

8.

Main selector

9.

Remote control receiver and remote LED

The 300p front panel is the same except for the
preamplifier functions (input selector, volume and
balance).

1. 2. 3. 4. 5. 6. 7. 8. 9.

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Summary of Contents for 300 Series

Page 1: ...P N 2055023151 A Al ll l r ri ig gh ht ts s r re es se er rv ve ed d 2 20 01 14 4 r re ev v1 1 300i 300p Ultimate 300B amplifiers Instruction manual ...

Page 2: ...put 11 Mains power connection 11 Ground post 11 Operating the amplifier 12 Front panel 12 Rear panel 13 How to turn the amplifier ON 14 Caution to use for the first power on 15 How often to adjust the bias 15 Installing new tubes 15 Adjusting backlight and LED intensity 16 Input selection 17 How to use Nagra remote control with 300i only 18 Load match meter 19 Reading the modulometer 20 Case clean...

Page 3: ... the serial number has been removed from the unit This limited warranty covers the repair of confirmed defects or if necessary the replacement of the faulty parts excluding all other indemnities All freight costs as well as customs duty and other possible charges are at the customer s expense We decline any responsibility for any and all damages resulting directly or indirectly from the use of our...

Page 4: ...is to provide innovation and technology in order to design high quality products The Hi Fi range was created to implement innovative designs and provide Nagra expertise to a new field Thank you for being our customer and enjoy your new 300B amplifier Package contents In addition to the user manual 300i or 300p main unit Transformer block 1 mains cable VFS vibration free support Set of spare fuses ...

Page 5: ...ubes run quite hot Remote device number and RC 5 If you wish to change the amplifier device number or if you want to use a RC 5 compatible remote do so before assembling the amplifier By default the 300i device number is 5 You may change this setting to any number from 1 to 6 Using Nagra gloves turn the amplifier upside down and put it on a soft surface Remove the plastic protection that hides the...

Page 6: ...6 Nagra 300i 300p Assembling the amplifier Three guide holes will help you to slide the transformer block into position These short rods fit into the guide holes ...

Page 7: ...nected In this picture you can see the guide rods being inserted into the base When reaching the base the transformer connector will need an extra push to be inserted in the base connector this is perfectly normal Inserting the block screws Using the screwdriver provided place the three fixing screws to hold the transformer in place the set includes two spare screws ...

Page 8: ... is written on the back of each tube connector on your amplifier as well as on the back of each tube base Spare tubes provided by Nagra can be placed in any position as you will adjust the amplifier s bias to their specification Please note the larger pin position Prior to inserting the tubes make sure the pins are in the right position Should you have any doubt remove them and start again 1 2 3 4...

Page 9: ...cing the tube in a wrong position can damage the amplifier and thus the warranty will be void Place tube protections The amplifiers are delivered with a set of tube protections made from Pyrex glass designed to resist the heat The protection s base is in iron and will be attracted to the amplifier deck by magnets Place the iron part into the gutter Tube protections are designed to avoid any contac...

Page 10: ...r cable in Audio inputs The 300i features 4 inputs A symmetrical on XLR connector B C Asymmetrical on RCA CINCH 2 V rms max D Asymmetrical on RCA CINCH 4 V rms max The 300p features a choice of symmetrical on XLR or asymmetrical on RCA CINCH Its maximum input level is 2 V rms Use the white jumper to select XLR or RCA input On this picture the input is on RCA ...

Page 11: ...the provided Load match meter please read the chapter Load match meter on page 19 The speaker s binding posts can accommodate a choice of bare wires up to 4 2 mm 4mm banana plugs or 6 35mm spade lugs Mains power connection You may now connect your power cable to the IEC plug just below the mains switch Ground post Your Nagra dealer may advice you on the opportunity to use the ground post It is onl...

Page 12: ...ustment 3 Modulometer 4 Modulometer function selector 5 Volume potentiometer 6 Fine left right level balance 7 Input selection display on LED A to D 8 Main selector 9 Remote control receiver and remote LED The 300p front panel is the same except for the preamplifier functions input selector volume and balance 1 2 3 4 5 6 7 8 9 ...

Page 13: ... CINCH 2 V rms max D asymmetrical input on RCA CINCH 4 1 V rms max 2 Serial number 3 Ground post 4 Power supply voltage indication 120 V on this picture 5 Mains connector 6 Fuse holder compartment 7 Mains switch I ON 0 OFF Except for the input block the 300i and 300p s rear panels are the same 1 2 3 4 5 6 7 ...

Page 14: ...ough the amplifier power consumption is 0 Watts In the I position it allows the starting up board to be powered the amplifier is in a stand by position the consumption is then less than 1 Watt Before powering on the amplifier make sure the volume is down to the minimum To start up the amplifier use the main selector located on the front panel 8 It is recommended to first put the selector to MUTE a...

Page 15: ...ld the amplifier be turned ON and OFF more than 4 times during the bias adjustment it will change its start up time to 2 minutes the RC LED will blink during these 2 minutes This waiting might seem long but is necessary to protect some components that endure a lot of stress during start up phase It is best to learn to adjust the bias fast to avoid multiple start ups How often to adjust the bias It...

Page 16: ...light and LED intensity There are 7 levels of intensity for the modulometer backlight and the LED Pushing the 2 switch down cloud will decrease intensity down to extinction pushing in the opposite direction sun will increase intensity ...

Page 17: ...tion is made through the horizontal toggle switch 7 Each left or right push will change the input Here from C to B Inputs A B and C accept signals up to 2 V rms Input D allows signals up to 4 1 V rms prefer this input if you use high level sources ...

Page 18: ...nged period Batteries contain chemical substances and must be disposed of appropriately Block 1 Your RCU II remote allows you to control several Nagra units Each unit has its own device numbered from 1 to 6 By default these numbers are Device Unit 1 PL L 2 3 DAC 4 CDC CDP 5 300i Block 2 The 300i uses the function written in RED A B C D input selection Will mute the input the LED below the MUTE pos...

Page 19: ...lack Represents anode current Red Represents anode voltage You might select a piece of music that represents the typical style you listen to often Play this tune repeat it if necessary and observe the needles Good match Needles are following each other with little difference as shown on the picture The impedance choice is optimal Poor match Needles movements seem to not relate to each other specia...

Page 20: ...te low from a couple of tenths to a Watt The amplifier can play up to 20 Watt and support high level peaks without problems However if the needle is continously at the 20 Watt position the distortion will increase significantly Case cleaning Clean the amplifier casing using a soft non fluffy slightly damp cloth Do not use any cleaning products which could have a corrosive effect Do not expose the ...

Page 21: ...ution The amplifier does not start A LED blinks Mains voltage is not right for your amplifier contact your dealer The amplifier does not start B LED blinks The output block transformer is not correctly inserted or the casing is open Switch off the mains switch on the rear panel O and make sure the transformer is in the right position If the LED still blinks contact your dealer The amplifier starts...

Page 22: ...The output block transformer is not correctly inserted or the casing is open Switch of the mains switch on the rear panel O and make sure the transformer is in the right position If the LED still blinks contact your dealer The amplifier starts but shuts down after 15 seconds LED blinks very fast every 0 5 S One or more tube s are faulty or not connected or their bias is not correctly set Read the ...

Page 23: ...minutes make a fine adjustment While adjusting the bias the amplifier might place itself into the protection mode the C LED will start blinking This is normal you just turn the amplifier OFF and ON again using the main selector 8 then pursue the adjustment Step 1 Turn the amplifier on using the main switch on the rear panel I position put the front main selector on MUTE Step 2 Check the bias on th...

Page 24: ... area and much too low The amplifier will go into the protection mode if you fail to bring the needle closer to the green area within 15 seconds from start up If the amplifier shuts down you can still move the potentiometer before restarting it Step 5 potentiometer direction Clockwise needle moves to the right Anti clockwise needle moves to the left Needle Tube Black 1 or 3 Red 2 or 4 The needle p...

Page 25: ...ft compartment Always use Nagra original fuse or some of the same type 5x20 depending on the mains voltage the fuse should be Mains voltage Type 5x20 100 115 V 2 A 120 V 230 V 2 A 230 V Place the fuse holder in its compartment make sure the metal connectors are on the right hand side Push until you hear a click 100 115 or 230 V power supplies are optimized to work with a specific mains voltage Onl...

Page 26: ... RCA or 1 XLR on 300p Selection by jumper on 300p Frequency response 14 Hz 45 kHz 0 3dB Signal to noise ratio 105 dB ASA A Total harmonic distortion THD 0 8 At full power Crosstalk 70 dB 10 kHz Inputs 2 V rms inputs A B and C 4 V rms inputs D 300p 2 V rms on RCA and on XLR Outputs Gold plated WBT Bare wires up to 4 2 mm 4mm banana plugs 6 35mm spade lugs Voltage range 90 132 V or 180 264 V 50 60 H...

Page 27: ...aux champs électromagnétiques EN 61000 4 3 Immunity to electromagnetic fields EN 61000 4 3 Immunité aux décharges électrostatiques EN 61000 4 2 Immunity to electrostatic discharges EN 61000 4 2 Immunité aux transitoires électriques rapides en salves sur câble d alimentation EN 61000 4 4 level 2 1000V Immunity to burst on mains line EN 61000 4 4 level 2 1000V Immunité aux aux transitoires électriqu...

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