La Chapell Model 583s Vacuum Tube Preamplifier for Microphones OM 电路图.pdf

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1、LACHAPELL AUDIO Model 583s Vacuum Tube Preamplifier for Microphones and Instruments Preliminary Operating Manual RadioFans.CN 收音机爱 好者资料库 Stated below are a few areas that you must take the time to read before you install and use your 583s. You as the owner/user are responsible for completely underst

2、anding how to operate this device safely and properly. UNPACKING:Inspect thoroughly. Although we take extreme care at final assembly and packing, things can happen during transit. It is very important that you contact LaChapell Audio if there is anything broken or damaged upon receipt of package. Sh

3、ipping is always insured and we will do our absolute best to satisfy any legitimate claim as long as it is made within 7 days of receipt. Included in every package should be: (1) preliminary operating manual, (1) packet of mounting screws, (1) registration card. It is a good idea for you to retain t

4、he packaging (box provided such inspection discloses that the defects are as specified above, and provided further that the Products has not been altered or repaired other than with authorization from LaChapell Audio and by its approved procedures, not been subjected to misuse, improper maintenance,

5、 negligence or accident or otherwise had its serial number or any part thereof altered, defaced or removed. All shipping and insurance costs for the Products repaired or replaced under warranty are the responsibility of the party shipping the Products. All defective items replaced hereunder shall be

6、come the property of LaChapell Audio Internal Gain, microphone: 70dB Internal Gain, Hi-Z: 50dB Maximum output: +26dBu (1% THD+N) Frequency Response: 12hz to 70khz (-3dB) THD+N: .25% (50db gain, 0dBu out) typical NOISE (EIN): Better than -120dB (rg=150ohm, 22hz to 20khz) Input Impendence: 1.5kohm mic

7、rophone, 40kohm Hi-Z Tube Complement: (1) ECC83/12AX7 Output Impendence: 50ohm Power Requirements: 220ma, +/- 14 volts (per API power supply) Specifications: Microphone Input -20dB Pad Control Phantom (+48v) Control Direct Input (Unbalanced) Input Gain Output Gain Polarity Control Polarity Tube Amp Balanced Output Input Select -20dB Pad Phantom 3