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musical instrument details
Rack mount RCA Pre-Amp Tube amplifier 50s vintage LMI-7xx LMI76 LMI-76A
Estimated price for orientation: 1 600 $
Category: Preamps and Channel Strips
Class:
Description Number of Channels: 4 Features: Modular, Rack-Mountable
Rack mount RCA Tube Pre-Amp amplifiers:These Preamps have been taken from a 1950's three track tape recorder (LM99) which formed part of a Sound and Film edit suit. They have been modified slightly at various points between then and now (with various notes pencilled in the original instruction manual), and all units have new smoothing caps.All of the units plug into the 19" rack mount box, which houses the power supply and the inputs / outputs. The Power supply is not original. LLMI-7xx Isolation Amplifier Serial number R-635
Two Chanel Class A preamp. One 12au7 per Chanel, 600 ohm Parmeko input and output transformers with gain control's mounted on the top of the unit (see photos)LMI-76 "Recording Amplifier" serial number R-662
200 ohm Parmeko input transformer Two 12au7 valves. Pushpull output into 600 ohms. I have the original schematic and instruction manual for this unit. Gain is adjusted with a screwdriver through the front panelLMI-79
200 ohm Parmeko input transformer Three12au7 valves. Pushpull output into600 ohms. I have the original schematic and instruction manual for this unit. Gain is adjusted with a screwdriver through the front panelAll the units work, and have a low noise floor but as I do not have the gear to connect to such low impedances I can only confirm that they pass a signal and would suggest they would need to be properly serviced before working at their best. All the Units are clean but have clearly been kept in damp conditions in the past so have some light corrosion and scratchy pots. The meter on the front panel is not connected.Any Questions please get in touch.Postage is Via FedEx and free to mainland uk, excluding highlands and islands. Please ask for a quote for any other destination.
Description
| Number of Channels: | 4 | Features: | Modular, Rack-Mountable |
Rack mount RCA Tube Pre-Amp amplifiers:These Preamps have been taken from a 1950's three track tape recorder (LM99) which formed part of a Sound and Film edit suit. They have been modified slightly at various points between then and now (with various notes pencilled in the original instruction manual), and all units have new smoothing caps.All of the units plug into the 19" rack mount box, which houses the power supply and the inputs / outputs. The Power supply is not original. LLMI-7xx Isolation Amplifier Serial number R-635
Two Chanel Class A preamp. One 12au7 per Chanel, 600 ohm Parmeko input and output transformers with gain control's mounted on the top of the unit (see photos)LMI-76 "Recording Amplifier" serial number R-662
200 ohm Parmeko input transformer Two 12au7 valves. Pushpull output into 600 ohms. I have the original schematic and instruction manual for this unit. Gain is adjusted with a screwdriver through the front panelLMI-79
200 ohm Parmeko input transformer Three12au7 valves. Pushpull output into600 ohms. I have the original schematic and instruction manual for this unit. Gain is adjusted with a screwdriver through the front panelAll the units work, and have a low noise floor but as I do not have the gear to connect to such low impedances I can only confirm that they pass a signal and would suggest they would need to be properly serviced before working at their best. All the Units are clean but have clearly been kept in damp conditions in the past so have some light corrosion and scratchy pots. The meter on the front panel is not connected.Any Questions please get in touch.Postage is Via FedEx and free to mainland uk, excluding highlands and islands. Please ask for a quote for any other destination.
Two Chanel Class A preamp. One 12au7 per Chanel, 600 ohm Parmeko input and output transformers with gain control's mounted on the top of the unit (see photos)LMI-76 "Recording Amplifier" serial number R-662
200 ohm Parmeko input transformer Two 12au7 valves. Pushpull output into 600 ohms. I have the original schematic and instruction manual for this unit. Gain is adjusted with a screwdriver through the front panelLMI-79
200 ohm Parmeko input transformer Three12au7 valves. Pushpull output into600 ohms. I have the original schematic and instruction manual for this unit. Gain is adjusted with a screwdriver through the front panelAll the units work, and have a low noise floor but as I do not have the gear to connect to such low impedances I can only confirm that they pass a signal and would suggest they would need to be properly serviced before working at their best. All the Units are clean but have clearly been kept in damp conditions in the past so have some light corrosion and scratchy pots. The meter on the front panel is not connected.Any Questions please get in touch.Postage is Via FedEx and free to mainland uk, excluding highlands and islands. Please ask for a quote for any other destination.