This is a vintage David Bogen Company tube power amplifier, manufactured in the USA for industrial / commercial PA or laboratory use, not consumer hi-fi. These were commonly used in institutional sound systems, factories, schools, and industrial control environments. Paramus, New Jersey. Marked 117 VAC / 60 Hz. 300 watts / 2.5 amps. Tube complement (by chassis labeling). (2) EL34 / 6CA7 output tubes. EZ81 / 6CA4 rectifier. 6AN8 driver / phase inverter. Relay socket present (industrial control use). 70V / 25V constant-voltage PA outputs. Also labeled 6.25? And 49? Taps. Designed for distributed speaker systems. Heavy-duty Bogen iron (power & output transformers). Original attached power cord. No attempt has been made to power the unit. Due to the age of this amplifier, it should be inspected and serviced by a qualified technician before use. As with most vintage tube equipment, some level of repair or restoration should be expected. Cosmetic condition shows normal wear consistent with age, including surface scratches, oxidation on laminations, and general shop wear. Please review all photos carefully, as they are part of the description. EL34 tube amp rebuild or conversion. Vintage PA / Bogen collectors. DIY tube audio builders. Transformer harvest for custom projects.

Please look at the pictures and ask questions.

I believe it’s a tube amplifier. See all photos for condition and what’s all included.

I believe it’s a tube amplifier. See all photos for condition and what’s all included.

I believe it’s a tube amplifier. See all photos for condition and what’s all included.

I believe it’s a tube amplifier. Looks to be missing some things.

1/1070-U Industrial Tube Amplifier Made In Italy – untested.

Vintage Industrial Commercial 6L6 Tube Amplifier With Potted Transformers. Servo-Kit made by Servo-Systems company. There are NO tubes included. Tube numbers are marked on chassis. Appear to be a very high quality unit. It appears someone was working on this one. Untested, unused for years. I will have 3 of these listed. All Sales Are Final. PLEASE NOTE ALL FAULTS SHOWN IN PICTURES ARE CONSIDERED PART OF THE DESCRIPTION. ALL ITEMS ARE EXPERTLY PACKED TO ARRIVE IN GOOD ORDER. The items we sell are vintage items. We will tell you if an item has been tested, to what degree it has been tested and what functions work or don’t work. We can work with just about any schedule. If you need additional time, please let us know. Please inquire for more info. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “prairie-view-antiques” and is located in this country: US. This item can be shipped to United States.

• Model: Industrial Commercial 6L6
• Brand: Serv-O-Systems
• Type: Tube Amplifier
• Custom Bundle: No
• Country/Region of Manufacture: United States

Vintage Dukane 1U550 5881/6L6 Tube Amplifier, Industrial, Commercial. Untested, unused for years. Looks like it was part of an intercom paging system. Dirty from long term storage. All Sales Are Final. PLEASE NOTE ALL FAULTS SHOWN IN PICTURES ARE CONSIDERED PART OF THE DESCRIPTION. ALL ITEMS ARE EXPERTLY PACKED TO ARRIVE IN GOOD ORDER. The items we sell are vintage items. We will tell you if an item has been tested, to what degree it has been tested and what functions work or don’t work. We can work with just about any schedule. If you need additional time, please let us know. Please inquire for more info. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “prairie-view-antiques” and is located in this country: US. This item can be shipped to United States.

• Brand: Dukane
• Type: Tube Amplifier
• Model: 1U550
• MPN: 1U550
• Country/Region of Manufacture: United States

Vintage Rare Two Eimac Industrial Tubes 3-400Z Made In USA 6305 Amplifier Audio. You will receive the exact same great looking Tubes that you see in the photos. Thank you for choosing Deals2Smile4! This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Parts & Accessories\Vintage Tubes & Tube Sockets”. The seller is “deals2smile4″ and is located in this country: US. This item can be shipped to United States.

• Brand: Eimac
• Type: Vacuum Tube
• Model: 3-400Z
• Country/Region of Manufacture: United States