For Sale MANUAL for the BOGEN Challenger CHB20A Amplifier. Amp schematic diagram on an 11 X 17 center page. Six other regular sized pages have information for tubes, modification in power supply circuit, mic and phonograph input connections, output, controls, operation, accessories, installation, if trouble occurs...Power ConsumptionHum and NoiseGain Sensitivity Input & Output Impedance Tone Control Action TUBES: Each tube number is given Dimensions Weight Complete, clear reprint with six regular size pages plus one 11 X 17 schematic page. Airmail ShippingNo customs import duty for this shipment. Protected in a waterproof covering and a well sealed package with a cardboard insert.Thank you from Canada.

For Sale MANUAL for the BOGEN Challenger CHB20A Amplifier. Amp schematic diagram on an 11 X 17 center page. Six other regular sized pages have information for tubes, modification in power supply circuit, mic and phonograph input connections, output, controls, operation, accessories, installation, if trouble occurs...Power ConsumptionHum and NoiseGain Sensitivity Input & Output Impedance Tone Control Action TUBES: Each tube number is given Dimensions Weight Complete, clear reprint with six regular size pages plus one 11 X 17 schematic page. Airmail ShippingNo customs import duty for this shipment. Protected in a waterproof covering and a well sealed package with a cardboard insert.Thank you from Canada.

For Sale SERVICE & OPERATING MANUAL for the BOGEN Challenger CHA 20 Watt Amplifier. Amp schematic diagram (dated 12-10-56) is on 11 X 17 center page. Three other regular sized pages with information for tubes, fuse replacement, pilot light replacement, mic and phonograph input connections, output, controls, operation, cage removal. SPECIFICATIONSPower Output Max. Power Power ConsumptionFrequency Response Hum and NoiseGain Sensitivity Input & Output Impedance Tone Control Action TUBES: Each tube number is given Dimensions Weight The BOGEN Challenger Tube Amp CHA 20 SERVICE & OPERATING MANUAL is a must-have for anyone who wants to get the most out of their CHA20 amplifier. This manual covers everything from basic operation to advanced features, including troubleshooting and repair tips. Written in English, this manual is specifically designed for the CHA20 model. Whether youre a professional audio technician or a home audio enthusiast, this manual is an invaluable resource that will help you get the best sound quality and longevity out of your amplifier. Very good condition reprint: 11 X 17 center schematic page and three regular size pages of clear, legible information, stored in a climate controlled, clean environment in Canada. Airmail Shipping No import duties will be charged for this shipment. Combined shipping for multiple purchases: If eBay checkout cart does not work properly, please feel free to purchase more than one item individually. All will be sent in one package and any excess paid for shipping will be refunded to you after shipping.Or, if you wish to purchase more than one item, simply send a message and we will do our best to help you. Protected in a waterproof covering and a well sealed package. Kind regards from Canada.

For Sale MANUAL for the BOGEN Challenger CHB20A Amplifier. Amp schematic diagram on an 11 X 17 center page. Six other regular sized pages have information for tubes, modification in power supply circuit, mic and phonograph input connections, output, controls, operation, accessories, installation, if trouble occurs...Power ConsumptionHum and NoiseGain Sensitivity Input & Output Impedance Tone Control Action TUBES: Each tube number is given Dimensions Weight Complete, clear reprint with six regular size pages plus one 11 X 17 schematic page. Airmail ShippingNo customs import duty for this shipment. Protected in a waterproof covering and a well sealed package with a cardboard insert.Thank you from Canada.

For Sale MANUAL for the BOGEN Challenger CHB20A Amplifier. Amp schematic diagram on an 11 X 17 center page. Six other regular sized pages have information for tubes, modification in power supply circuit, mic and phonograph input connections, output, controls, operation, accessories, installation, if trouble occurs...Power ConsumptionHum and NoiseGain Sensitivity Input & Output Impedance Tone Control Action TUBES: Each tube number is given Dimensions Weight Complete, clear reprint with six regular size pages plus one 11 X 17 schematic page. Airmail ShippingNo customs import duty for this shipment. Protected in a waterproof covering and a well sealed package with a cardboard insert.Thank you from Canada.

For Sale MANUAL for the BOGEN Challenger CHB20A Amplifier. Amp schematic diagram on an 11 X 17 center page. Six other regular sized pages have information for tubes, modification in power supply circuit, mic and phonograph input connections, output, controls, operation, accessories, installation, if trouble occurs...Power ConsumptionHum and NoiseGain Sensitivity Input & Output Impedance Tone Control Action TUBES: Each tube number is given Dimensions Weight Complete, clear reprint with six regular size pages plus one 11 X 17 schematic page. Airmail ShippingNo customs import duty for this shipment. Protected in a waterproof covering and a well sealed package with a cardboard insert.Thank you from Canada.

For Sale MANUAL for the BOGEN Challenger CHB20A Amplifier. Amp schematic diagram on an 11 X 17 center page. Six other regular sized pages have information for tubes, modification in power supply circuit, mic and phonograph input connections, output, controls, operation, accessories, installation, if trouble occurs...Power ConsumptionHum and NoiseGain Sensitivity Input & Output Impedance Tone Control Action TUBES: Each tube number is given Dimensions Weight Complete, clear reprint with six regular size pages plus one 11 X 17 schematic page. Airmail ShippingNo customs import duty for this shipment. Protected in a waterproof covering and a well sealed package with a cardboard insert.Thank you from Canada.

For Sale SERVICE & OPERATING MANUAL for the BOGEN Challenger CHA 20 Watt Amplifier. Amp schematic diagram (dated 12-10-56) is on 11 X 17 center page. Three other regular sized pages with information for tubes, fuse replacement, pilot light replacement, mic and phonograph input connections, output, controls, operation, cage removal. SPECIFICATIONSPower Output Max. Power Power ConsumptionFrequency Response Hum and NoiseGain Sensitivity Input & Output Impedance Tone Control Action TUBES: Each tube number is given Dimensions Weight Very good condition reprint: 11 X 17 center schematic page and three regular size pages of clear, legible information, stored in a climate controlled, clean environment in Canada. Airmail Shipping No import duties will be charged for this shipment. Combined shipping for multiple purchases: If eBay checkout cart does not work properly, please feel free to purchase more than one item individually. All will be sent in one package and any excess paid for shipping will be refunded to you after shipping.Or, if you wish to purchase more than one item, simply send a message and we will do our best to help you. Protected in a waterproof covering and a well sealed package. Thank you from Canada.

Introducing the Bogen Challenger C-20A, an audio amplifier that delivers powerful and clear sound for all your audio needs. With 20 watts of output power, this amplifier is perfect for enhancing your home audio system or for use in small events and gatherings. The Bogen Challenger C-20A is designed with quality and durability in mind, featuring a sleek and compact design that easily fits in any space. Its brand, Bogen, is known for producing top-notch audio equipment that meets the highest standards in the industry. Whether youre a music enthusiast or an audio professional, the Bogen Challenger C-20A is a perfect choice for your audio needs.

For Sale MANUAL for the BOGEN Challenger CHB20A Amplifier. Amp schematic diagram on an 11 X 17 center page. Six other regular sized pages have information for tubes, modification in power supply circuit, mic and phonograph input connections, output, controls, operation, accessories, installation, if trouble occurs...Power ConsumptionHum and NoiseGain Sensitivity Input & Output Impedance Tone Control Action TUBES: Each tube number is given Dimensions Weight Complete, clear reprint with six regular size pages plus one 11 X 17 schematic page. Airmail ShippingNo customs import duty for this shipment. Protected in a waterproof covering and a well sealed package with a cardboard insert.Thank you from Canada.

For Sale SERVICE & OPERATING MANUAL for the BOGEN Challenger CHA 20 Watt Amplifier. Amp schematic diagram (dated 12-10-56) is on 11 X 17 center page. Three other regular sized pages with information for tubes, fuse replacement, pilot light replacement, mic and phonograph input connections, output, controls, operation, cage removal. SPECIFICATIONSPower Output Max. Power Power ConsumptionFrequency Response Hum and NoiseGain Sensitivity Input & Output Impedance Tone Control Action TUBES: Each tube number is given Dimensions Weight Very good condition reprint: 11 X 17 center schematic page and three regular size pages of clear, legible information, stored in a climate controlled, clean environment in Canada. Airmail Shipping No import duties will be charged for this shipment. Combined shipping for multiple purchases: If eBay checkout cart does not work properly, please feel free to purchase more than one item individually. All will be sent in one package and any excess paid for shipping will be refunded to you after shipping.Or, if you wish to purchase more than one item, simply send a message and we will do our best to help you. Protected in a waterproof covering and a well sealed package. Thank you from Canada.

For Sale SERVICE & OPERATING MANUAL for the BOGEN Challenger CHA 20 Watt Amplifier. Amp schematic diagram (dated 12-10-56) is on 11 X 17 center page. Three other regular sized pages with information for tubes, fuse replacement, pilot light replacement, mic and phonograph input connections, output, controls, operation, cage removal. SPECIFICATIONSPower Output Max. Power Power ConsumptionFrequency Response Hum and NoiseGain Sensitivity Input & Output Impedance Tone Control Action TUBES: Each tube number is given Dimensions Weight Very good condition reprint: 11 X 17 center schematic page and three regular size pages of clear, legible information, stored in a climate controlled, clean environment in Canada. Airmail Shipping No import duties will be charged for this shipment. Combined shipping for multiple purchases: If eBay checkout cart does not work properly, please feel free to purchase more than one item individually. All will be sent in one package and any excess paid for shipping will be refunded to you after shipping.Or, if you wish to purchase more than one item, simply send a message and we will do our best to help you. Protected in a waterproof covering and a well sealed package. Thank you from Canada.

For Sale MANUAL for the BOGEN Challenger CHB20A Amplifier. Amp schematic diagram on an 11 X 17 center page. Six other regular sized pages have information for tubes, modification in power supply circuit, mic and phonograph input connections, output, controls, operation, accessories, installation, if trouble occurs...Power ConsumptionHum and NoiseGain Sensitivity Input & Output Impedance Tone Control Action TUBES: Each tube number is given Dimensions Weight Complete, clear reprint with six regular size pages plus one 11 X 17 schematic page. Airmail ShippingNo customs import duty for this shipment. Protected in a waterproof covering and a well sealed package with a cardboard insert.Thank you from Canada.

For Sale MANUAL for the BOGEN Challenger CHB20A Amplifier. Amp schematic diagram on an 11 X 17 center page. Six other regular sized pages have information for tubes, modification in power supply circuit, mic and phonograph input connections, output, controls, operation, accessories, installation, if trouble occurs...Power ConsumptionHum and NoiseGain Sensitivity Input & Output Impedance Tone Control Action TUBES: Each tube number is given Dimensions Weight Complete, clear reprint with six regular size pages plus one 11 X 17 schematic page. Airmail ShippingNo customs import duty for this shipment. Protected in a waterproof covering and a well sealed package with a cardboard insert.Thank you from Canada.

For Sale SERVICE & OPERATING MANUAL for the BOGEN Challenger CHA 20 Watt Amplifier. Amp schematic diagram (dated 12-10-56) is on 11 X 17 center page. Three other regular sized pages with information for tubes, fuse replacement, pilot light replacement, mic and phonograph input connections, output, controls, operation, cage removal. SPECIFICATIONSPower Output Max. Power Power ConsumptionFrequency Response Hum and NoiseGain Sensitivity Input & Output Impedance Tone Control Action TUBES: Each tube number is given Dimensions Weight Very good condition reprint: 11 X 17 center schematic page and three regular size pages of clear, legible information, stored in a climate controlled, clean environment in Canada. Airmail Shipping No import duties will be charged for this shipment. Combined shipping for multiple purchases: If eBay checkout cart does not work properly, please feel free to purchase more than one item individually. All will be sent in one package and any excess paid for shipping will be refunded to you after shipping.Or, if you wish to purchase more than one item, simply send a message and we will do our best to help you. Protected in a waterproof covering and a well sealed package. Thank you from Canada.

For Sale SERVICE & OPERATING MANUAL for the BOGEN Challenger CHA 20 Watt Amplifier. Amp schematic diagram (dated 12-10-56) is on 11 X 17 center page. Three other regular sized pages with information for tubes, fuse replacement, pilot light replacement, mic and phonograph input connections, output, controls, operation, cage removal. SPECIFICATIONSPower Output Max. Power Power ConsumptionFrequency Response Hum and NoiseGain Sensitivity Input & Output Impedance Tone Control Action TUBES: Each tube number is given Dimensions Weight Very good condition reprint: 11 X 17 center schematic page and three regular size pages of clear, legible information, stored in a climate controlled, clean environment in Canada. Airmail Shipping No import duties will be charged for this shipment. Combined shipping for multiple purchases: If eBay checkout cart does not work properly, please feel free to purchase more than one item individually. All will be sent in one package and any excess paid for shipping will be refunded to you after shipping.Or, if you wish to purchase more than one item, simply send a message and we will do our best to help you. Protected in a waterproof covering and a well sealed package. Thank you from Canada.

For Sale MANUAL for the BOGEN Challenger CHB20A Amplifier. Amp schematic diagram on an 11 X 17 center page. Six other regular sized pages have information for tubes, modification in power supply circuit, mic and phonograph input connections, output, controls, operation, accessories, installation, if trouble occurs...Power ConsumptionHum and NoiseGain Sensitivity Input & Output Impedance Tone Control Action TUBES: Each tube number is given Dimensions Weight Complete, clear reprint with six regular size pages plus one 11 X 17 schematic page. Airmail ShippingNo customs import duty for this shipment. Protected in a waterproof covering and a well sealed package with a cardboard insert.Thank you from Canada.

Bogen Challenger CHS-20. Selling as parts. I have no clue what this does or how it works. Came from an estate. I plugged in and didn’t see any kind of power light on it.

Bogen Challenger C-20A Amplifier Vintage electronics tube amplifier solid state in excellent condition

For Sale MANUAL for the BOGEN Challenger CHB20A Amplifier. Amp schematic diagram on an 11 X 17 center page. Six other regular sized pages have information for tubes, modification in power supply circuit, mic and phonograph input connections, output, controls, operation, accessories, installation, if trouble occurs...Power ConsumptionHum and NoiseGain Sensitivity Input & Output Impedance Tone Control Action TUBES: Each tube number is given Dimensions Weight Complete, clear reprint with six regular size pages plus one 11 X 17 schematic page. Airmail ShippingNo customs import duty for this shipment. Protected in a waterproof covering and a well sealed package with a cardboard insert.Thank you from Canada.

For Sale SERVICE & OPERATING MANUAL for the BOGEN Challenger CHA 20 Watt Amplifier. Amp schematic diagram (dated 12-10-56) is on 11 X 17 center page. Three other regular sized pages with information for tubes, fuse replacement, pilot light replacement, mic and phonograph input connections, output, controls, operation, cage removal. SPECIFICATIONSPower Output Max. Power Power ConsumptionFrequency Response Hum and NoiseGain Sensitivity Input & Output Impedance Tone Control Action TUBES: Each tube number is given Dimensions Weight Very good condition reprint: 11 X 17 center schematic page and three regular size pages of clear, legible information, stored in a climate controlled, clean environment in Canada. Airmail Shipping No import duties will be charged for this shipment. Combined shipping for multiple purchases: If eBay checkout cart does not work properly, please feel free to purchase more than one item individually. All will be sent in one package and any excess paid for shipping will be refunded to you after shipping.Or, if you wish to purchase more than one item, simply send a message and we will do our best to help you. Protected in a waterproof covering and a well sealed package. Thank you from Canada.

For Sale MANUAL for the BOGEN Challenger CHB20A Amplifier. Amp schematic diagram on an 11 X 17 center page. Six other regular sized pages have information for tubes, modification in power supply circuit, mic and phonograph input connections, output, controls, operation, accessories, installation, if trouble occurs...Power ConsumptionHum and NoiseGain Sensitivity Input & Output Impedance Tone Control Action TUBES: Each tube number is given Dimensions Weight Complete, clear reprint with six regular size pages plus one 11 X 17 schematic page. Airmail ShippingNo customs import duty for this shipment. Protected in a waterproof covering and a well sealed package with a cardboard insert.Thank you from Canada.