armstrong 521 stereo amplifier

Armstrong 521 Stereo Amplifier

Armstrong 521 Stereo Amplifier 2 x 25 watts output at 0.5% harmonic distortion. Outputs for Tape Recording and headphones Inputs for tape, radio, ceramic cartridge & magnetic cartridge. Good condition Read more

Armstrong 521 Stereo Amplifier for disc/tape/MP3/CD*

Very nice example of this highly acclaimed Hi-Fi stereo amplifier from the 70's. Unmodified - with original AL102 germanium power transistors and two pin speaker plugs. Has been cleaned and all functions checked after a long period of storage (Bias, main caps checked and switches cleaned). Teak sleeve case is in very good condition. Collectors item. Posts by courier to UK. * Note that MP3 players will need a 3.5 mm stereo jack to male phono plugs cable to connect the earphone output to the amplifier 'radio' inputs, and a low volume setting from the MP3 player. Modern CD players with 2V level 'line' outputs will need a resistive attenuator to drop the level from 2V to 0.4V (or less), so a divide by 5 (-14db) or divide by db) in-line device will be required between the CD player line out and the amplifier 'tape' inputs. If the CD player has a headphone output (3.5 mm jack plug), then the same connection method as stated above for an MP3 player, can be used. Specifications: Output power (RMS): 2 x 20 W into 4 to 8 Ohms, 2 x 15 W into 15 Ohms Frequency response: 22 Hz to 20 kHz (-1 db) Distortion: Less than 0.5 % at 2 x 15 W output Inputs: 2 x 3.5 mV / 60 mV (switch selectable magnetic/ceramic cartridge), 2 x 0.4 V (tape), 2 x 0.1 V (radio), both at 100k Ohm input impedance Noise level (RMS): -55 db (magnetic cartridge), -60 db (radio), -70 db (tape) Line output: 2 x 0.4 V (via adjustable tone controls) Headphone out: 1 x 6.3 mm stereo (low impedance, mutes main speaker outputs) Rotary controls: Volume, balance, treble, bass Push button controls: Power on/off, rumble filter (-5 db at 30Hz), treble cut 1 (-3 db at 6.5 kHz & -25 db at 10 kHz), treble cut 2 (-3 db at 4.5 kHz & -40 db at 9.0 kHz), loudness (-20 db at 1kHz produces +10 db at 70 Hz & +5db at 10 kHz), tape input, tape output, radio input, magnetic cartridge input, ceramic cartridge input Power supply: , Vac (selectable), Hz, transformer isolated, internal linear voltage regulated, ~ 20 W (idling) ~ 70 W (max) Cooling: Passive - air cooled Dimensions: 29.5 cm (W) x 29.0 cm (D) x 12.5 cm (H) Weight: 5.5 kg Read More

Armstrong 521 Stereo Amplifier for disc/tape/MP3/CD* in

Very nice example of this highly acclaimed Hi-Fi stereo amplifier from the 70's. Unmodified - with original AL102 germanium power transistors and two pin speaker plugs. Has been cleaned and all functions checked after a long period of storage (Bias, main caps checked and switches cleaned). Teak sleeve case is in very good condition. Collectors item. £75 ono. Carefully packed and posts for £7.99 by courier to UK, insured and signed for. * Note that MP3 players will need a 3.5 mm stereo jack to male phono plugs cable to connect the earphone output to the amplifier 'radio' inputs, and a low volume setting from the MP3 player. Modern CD players with 2V level 'line' outputs will need a resistive attenuator to drop the level from 2V to 0.4V (or less), so a divide by 5 (-14db) or divide by db) in-line device will be required between the CD player line out and the amplifier 'tape' inputs. If the CD player has a headphone output (3.5 mm jack plug), then the same connection method as stated above for an MP3 player, can be used. Specifications: Output power (RMS): 2 x 20 W into 4 to 8 Ohms, 2 x 15 W into 15 Ohms Frequency response: 22 Hz to 20 kHz (-1 db) Distortion: Less than 0.5 % at 2 x 15 W output Inputs: 2 x 3.5 mV / 60 mV (switch selectable magnetic/ceramic cartridge), 2 x 0.4 V (tape), 2 x 0.1 V (radio), both at 100 k Ohm input impedance Noise level (RMS): -55 db (magnetic cartridge), -60 db (radio), -70 db (tape) Line output: 2 x 0.4 V (via adjustable tone controls) Headphone out: 1 x 6.3 mm stereo (low impedance, mutes main speaker outputs) Rotary controls: Volume, balance, treble, bass Push button controls: Power on/off, rumble filter (-5 db at 30Hz), treble cut 1 (-3 db at 6.5 kHz & -25 db at 10 kHz), treble cut 2 (-3 db at 4.5 kHz & -40 db at 9.0 kHz), loudness (-20 db at 1kHz produces +10 db at 70 Hz & +5db at 10 kHz), tape input, tape output, radio input, magnetic cartridge input, ceramic cartridge input Power supply: , Vac (selectable), Hz, transformer isolated, internal linear voltage regulated, ~ 20 W (idling) ~ 70 W (max) Cooling: Passive - air cooled Dimensions: 29.5 cm (W) x 29.0 cm (D) x 12.5 cm (H) Weight: 5.5 kg

Vintage Armstrong 521 Stereo Amplifier for disc/tape/MP3/CD*

Very nice example of this highly acclaimed Hi-Fi stereo amplifier from the late 60's. Unmodified - with original AL102 germanium power transistors and two pin speaker plugs. Has been cleaned and all functions checked after a long period of storage (Bias, main caps checked and switches cleaned). Teak sleeve case is in very good condition. Collectors item. £75 ono. Carefully packed and posts for £ by courier to UK, insured and signed for. * Note that MP3 players will need a 3.5 mm stereo jack to male phono plugs cable to connect the earphone output to the amplifier 'tape' inputs, and a low volume setting from the MP3 player. Modern CD players with 2V level 'line' outputs will need a resistive attenuator to drop the level from 2V to 0.4V (or less), so a divide by 5 (-14db) or divide by db) in-line device will be required between the CD player line out and the amplifier 'tape' inputs. Specifications: Output power (RMS): 2 x 20 W into 4 to 8 Ohms, 2 x 15 W into 15 Ohms Frequency response: 22 Hz to 20 kHz (-1 db) Distortion: Less than 0.5 % at 2 x 15 W output Inputs: 2 x 3.5 mV / 60 mV (switch selectable magnetic/ceramic cartridge), 2 x 0.4 V (tape), 2 x 0.1 V (radio), both at 100 k Ohm input impedance Noise level (RMS): -55 db (magnetic cartridge), -60 db (radio), -70 db (tape) Line output: 2 x 0.4 V (via adjustable tone controls) Headphone out: 1 x 6.3 mm stereo (low impedance, mutes main speaker outputs) Rotary controls: Volume, balance, treble, bass Push button controls: Power on/off, rumble filter (-5 db at 30Hz), treble cut 1 (-3 db at 6.5 kHz & -25 db at 10 kHz), treble cut 2 (-3 db at 4.5 kHz & -40 db at 9.0 kHz), loudness (-20 db at 1 kHz produces +10 db at 70 Hz & +5db at 10 kHz), tape input, tape output, radio input, magnetic cartridge input, ceramic cartridge input Power supply: , Vac (selectable), Hz, transformer isolated, internal linear voltage regulated, ~ 20 W (idling) ~ 70 W (max) Cooling: Passive - air cooled

Vintage Armstrong 521 Stereo Amplifier for disc/tape/MP3/CD*

Very nice example of this highly acclaimed Hi-Fi stereo amplifier from the late 60's. Unmodified - with original AL102 germanium power transistors and two pin speaker plugs. Has been cleaned and all functions checked after a long period of storage (Bias, main caps checked and switches cleaned). Teak sleeve case is in very good condition. Collectors item. £75 ono. Carefully packed and posts for £ by courier to UK, insured and signed for. * Note that MP3 players will need a 3.5 mm stereo jack to male phono plugs cable to connect the earphone output to the amplifier 'tape' inputs, and a low volume setting from the MP3 player. Modern CD players with 2V level 'line' outputs will need a resistive attenuator to drop the level from 2V to 0.4V (or less), so a divide by 5 (-14db) or divide by db) in-line device will be required between the CD player line out and the amplifier 'tape' inputs. Specifications: Output power (RMS): 2 x 20 W into 4 to 8 Ohms, 2 x 15 W into 15 Ohms Frequency response: 22 Hz to 20 kHz (-1 db) Distortion: Less than 0.5 % at 2 x 15 W output Inputs: 2 x 3.5 mV / 60 mV (switch selectable magnetic/ceramic cartridge), 2 x 0.4 V (tape), 2 x 0.1 V (radio), both at 100 k Ohm input impedance Noise level (RMS): -55 db (magnetic cartridge), -60 db (radio), -70 db (tape) Line output: 2 x 0.4 V (via adjustable tone controls) Headphone out: 1 x 6.3 mm stereo (low impedance, mutes main speaker outputs) Rotary controls: Volume, balance, treble, bass Push button controls: Power on/off, rumble filter (-5 db at 30Hz), treble cut 1 (-3 db at 6.5 kHz & -25 db at 10 kHz), treble cut 2 (-3 db at 4.5 kHz & -40 db at 9.0 kHz), loudness (-20 db at 1 kHz produces +10 db at 70 Hz & +5db at 10 kHz), tape input, tape output, radio input, magnetic cartridge input, ceramic cartridge input Power supply: , Vac (selectable), Hz, transformer isolated, internal linear voltage regulated, ~ 20 W (idling) ~ 70 W (max) Cooling: Passive - air cooled Dimensions: 29.5 cm (W) x 29.0 cm (D) x 12.5 cm (H) Weight: 5.5 kg

Vintage Armstrong 521 Stereo Amp for disc/tape

Very nice example of this highly acclaimed Hi-Fi stereo amplifier from the late 60's. Unmodified - with original AL102 germanium power transistors and two pin speaker plugs. Has been cleaned and all functions checked after a long period of storage (Bias, main caps checked and switches cleaned). Teak sleeve case is in very good condition. Collectors item. Posts by courier to UK. Read More

Vintage Armstrong 521 Stereo Amp for disc/tape in Newbury

Very nice example of this highly acclaimed Hi-Fi stereo amplifier from the late 60's. Unmodified - with original AL102 germanium power transistors and two pin speaker plugs. Has been cleaned and all functions checked after a long period of storage (Bias, main caps checked and switches cleaned). Teak sleeve case is in very good condition. Collectors item. £75 ono. Carefully packed and posts for £ by courier to UK, insured and signed for.

Vintage Armstrong 521 Stereo Amp for disc/tape in Newbury

Very nice example of this highly acclaimed Hi-Fi stereo amplifier from the late 60's. Unmodified - with original AL102 germanium power transistors and two pin speaker plugs. Has been cleaned and all functions checked after a long period of storage (Bias, main caps checked and switches cleaned). Teak sleeve case is in very good condition. Collectors item. Posts by courier to UK. £100 ono.

Vintage Armstrong 521 Stereo Amp for disc/tape in Newbury

Very nice example of this highly acclaimed Hi-Fi stereo amplifier from the late 60's. Unmodified - with original AL102 germanium power transistors and two pin speaker plugs. Has been cleaned and all functions checked after a long period of storage (Bias, main caps checked and switches cleaned). Teak sleeve case is in very good condition. Collectors item. £90 ono. Carefully packed and posts for £ by courier to UK, insured and signed for.

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