Related Manuals for Tavish Design MM series
Summary of Contents for Tavish Design MM series
- Page 1 Classic Vacuum Tube Phono Stage (MM / MC) Owner’s Manual (Assembled) , LLC AVISH ESIGN Made in U.S.A.
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Page 2: Table Of Contents
ABLE OF ONTENTS 1. Introduction & Quick Start 2. Safety Considerations 3. Setup & Operation 3.1. Initial Setup 3.2. Operation 3.3. Tube Replacement 4. Technical Information 5. Warranty and Service 6. Copyright, Trademark, and Disclaimers Manual Release 5.1A (15 Jan. 2016) -
Page 3: Introduction & Quick Start
TART Thanks for buying the Classic Phono Stage! Tavish Design’s Classic Vacuum-Tube Phono Stage is a passively-equalized, two-gain-stage design whose basic circuit topology has remained popular for more than 55 years. The reason for its endurance is simple: with appropriate updates, it is very difficult to beat without going to elaborate multi-tube circuits. -
Page 4: Safety Considerations
Lethal voltages can remain in the electronics after the unit is unplugged. Refer servicing to Tavish Design, LLC. If the unit must be opened for servicing, unplug it and wait at least 10 minutes for internal capacitors to discharge. -
Page 5: Setup & Operation
ETUP 3.1 I NITIAL ETUP Setup consists of installing the tubes (if needed), selecting the Moving Magnet (MM) or Moving Coil (MC) input, and setting the cartridge loading and MC gain (if needed). The factory settings for these should work well with most MM cartridges, and with low-output MC cartridges, so you might not need to adjust anything. - Page 6 Cartridge Loading and Moving Coil Gain Cartridge loading and the MC gain setting are set with internal DIP switches. The factory settings for these should work well with most MM cartridges, and with low-output MC cartridges. To select other settings, unplug the unit and wait 10 minutes for the internal capacitors to discharge. Remove the cover by removing 4 screws.
- Page 7 MM Load Setting (S2) S2 Positions (1 – 7) OFF = 0, ON = 1 No added capacitance 0001000 47 pF 1001100 Factory Default 100 pF 0101010 147 pF 1101110 180 pF 0011001 227 pF 1011101 280 pF 0111011 327 pF 1111111 Table 3.2: MM Load Settings.
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Page 8: Operation
3.2 O PERATION If you removed the cover to adjust to set the cartridge loading and gain switches, you must replace it before operating the unit. To avoid a risk of electric shock, never operate the unit with the cover removed. -
Page 9: Technical Information
ECHNICAL NFORMATION Parameter Specification Gain 41 dB Moving Magnet 53 dB High-Output Moving Coil 61 dB Low-Output Moving Coil RIAA Equalization Accuracy ±0.5 dB, 30 Hz – 20 kHz Signal-to-noise ratio >79 dBA ref. 5 mV @ 1kHz, Moving Magnet (A-weighted) >79 dBA ref. - Page 10 Measured RIAA Equalization Accuracy -0.5 -1.5 1000 10000 Frequency, Hz Fig. 4.1: Measured RIAA equalization error for 5 units with 5 sets of JJ tubes, left and right channels. Error is <0.5 dB from 30 Hz – 20 kHz for all curves. Fig.
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Page 11: Warranty And Service
(6) years from the date of purchase (6 months on tubes). If you discover a defect, Tavish Design will (at its option) repair or replace the product at no cost to you (excluding return shipping and handling outside the 48 continental United States) provided that you send it prepaid to Tavish Design (see Section 5.2). -
Page 12: Copyright, Trademark, And Disclaimers
(RMA) number, along with packing and shipping instructions and a street address for delivery. For kits, Tavish Design offers a repair service in the event you are unable to get your kit working. Please contact us for more details.