JUMBO SHRIMP® OWNER’S MANUAL TUBES RULE rev4/20/11cd
CONTENTS SECTION PAGE INTRODUCTION 3 MAINS CONNECTIONS 4 GETTING STARTED 5 MOVING RIGHT ALONG 6 FEATURES AND APPLICATIONS 7 SIMPLE TROUBLESHOOTING 9 REPLACING A TUBE OR LAMP 10 TUBE FAQ 11 MORE SILLY VACUUM TUBE QUESTIONS 12 OPTIMIZING YOUR SOUND SYSTEM 13 REMORA REMOTE CONTROL INSTRUCTIONS 15 SPECIFICATIONS 16 2
INTRODUCTION THANK YOU!... for choosing the Manley JUMBO SHRIMP® PREAMPLIFIER! The JUMBO SHRIMP shares key outward features found in many of its counterparts both past and present. It is a twochannel single-ended line level control preamplifier with five sets of stereo inputs, and two sets of paralleled stereo line outputs. A five-position input selector switch routes the chosen signal directly to the first amplifier tube’s control grid. Amplified signals, boosted about 4 times [11.
MAINS CONNECTIONS Your JUMBO SHRIMP has been factory set to the correct mains voltage for your country. The voltage setting is marked on the serial badge, located on the rear panel. Check that this complies with your local supply. Export units for certain markets have a moulded mains plug fitted to comply with local requirements.
GETTING STARTED PREPARATION FOR INSTALLATION Budget a suitable space in which to place the preamplifier and associated interconnect and mains power cables. This space should be free of strong external magnetic and RF fields, and reasonably removed from strong loudspeaker-generated acoustical fields. This space should also be free of excessive heat or dust and large enough to permit easy flow of cool air to the top, bottom and sides of the preamp.
MOVING RIGHT ALONG... Why can’t I have balanced ins or outs? Like we said earlier, since the whole guts of the Jumbo Shrimp are inherently single-ended, adding balanced I/O would require additional circuitry, transformers, or IC’s which would inevitably color the sound.
FEATURES AND APPLICATIONS 1. VERY SHORT SIGNAL PATH WITH ABUNDANT POWER GAIN. Each of the JUMBO SHRIMP’s five sets of input jacks subjects the incoming signal source to loading of no less than 100,000 ohms, while the output can comfortably provide over 3 volts into a test load of 600 ohms. This implies a POWER gain of better than 22 deciBels, even though the VOLTAGE gain is held to no more than 12 dB when the volume attenuator is at maximum.
2. VOLUME AND BALANCE ATTENUATORS The JUMBO SHRIMP’s volume attenuator features two conventional logarithmic-taper resistance tracks, with the notable exception that the matching of these two tracks is especially good over the rotational range of the control. Invariably a headache with cheap dual potentiometers, this enticing attribute of the ALPS attenuator set translates into very good level balance between channels as the control is adjusted.
TROUBLESHOOTING It is rare that any of these problems occur but if they do here are some things to try. HUM - Try a mains ground adapter if they are legal in your country. They are also called 3 pin to 2 pin adapters or “cheaters” and are available in hardware stores. There should be one ground in your system and only one. If two or more pieces of gear have 3 pin AC cables a ground loop can occur which will usually cause hum.
REPLACING a TUBE or the INDICATOR LAMP. Yes there are user-servicable parts inside! (Contrary to what The Safety Regulatory People tell us to declare on the rear of the chassis.) But, as with other vacuum tube based products, there is also high voltage present. Therefore caution must be used when covers are removed; otherwise there could be shock hazard. Probably not enough to kill you, only enough to severely annoy you should you inadvertently grab onto the B+ volts.
TUBE FAQ UNIT AS VIEWED FROM TOP. INPUT TUBES (12AT7) OUTPUT TUBES (7044) Upper tubes = LEFT channel Lower tubes = RIGHT channel LEFT RIGHT DRIVER TUBES (5670) A few general vacuum tube all-too-frequently-asked questions answered. Excerpts from the manley.com FAQ: FAQ #16. Do you sell tubes? I don’t know what you’re talking about. FAQ #16a. I need to retube my Manley preamplifier. Do you sell tubes? Sorry. Just kidding. Yes, of course we do.
More silly vacuum tube questions... FAQ #16f. Should I turn off my gear between uses? While power cycling is a factor for ultimate tube life, there also is a fixed number of electrons that can ultimately jump off the cathode. In general we do recommend if you aren’t using the gear for more than a few hours you should power it down. Do you leave the lights on in your house when you are away? FAQ #16g. But it sounds different when you first turn it back on.
Optimizing Your Sound System This section is full of Hutch’s little hints that may help you get the most out of your stereo - and it may not cost anything or cost very little. Probably, you know most of this, but hopefully some of it may be new or refresh your memory or just be refreshing reading in a manual. A very important factor is your speakers. Hopefully you have good speakers and they are appropriate for your power amplifier.
More Helpful Hints... You may have bought a great system but there is a good chance that you are only getting a fraction of its potential. Very frequently we have experienced top quality electronics sounding unimpressive simply because acoustics were ignored. Even amongst studio engineers, few can really tell the difference between good speakers in a bad room and bad speakers in a good room - but they all know good speakers in a good room and very likely so do you.
REMORA REMOTE CONTROL OPERATING INSTRUCTIONS Quick Start: Your Remora Remote Control system has been configured and tested at the factory to verify that the communication link between the radio frequency transmitter and the mating receiver-decoder inside the Jumbo Shrimp Preamplifier has been properly established. Before beginning, ensure that a fresh 9V alkaline battery has been installed in the Remora Remote transmitter. Yes, we installed a new 9V battery in the Remora Remote when it left the factory.
Remora Remote Features! 1. Remote transmitter and receiver operate under crystal-clocked microprocessor control for maximum signal discrimination, flexibility, and system range. 2. The user may easily reprogram the user-number portion of the remote system’s serial I.D. data stream. This will eliminate the possibility of undesired operation due to remote command collisions. 3.
The Remora system is highly resistant to false operation due to noise or other remote signals, but the range will be reduced if the competing signals or noise is very strong. If you experience intermittently poor range, briefly try operating the equipment at another location free of possible sources of interference before contacting your dealer or Manley Labs. Keep the remote and all other parts of the system away from rain or moisture of any sort.
How to change the user-numbers and re-pair the system: Ordinarily there will seldom be a need to change the user-number. Changing the user-number requires a few more ballet steps, as listed below. Some steps are time-window sensitive to help prevent pairing errors due to interference from other signals on the radio channel.Please read over the list of required actions and LED reactions completely before attempting to reprogram your Remora system user-number. 1.
SPECIFICATIONS ALL-TUBE: Vacuum Tube all-triode design Input Tubes: 2 x 12AT7EH large plate Electro-Harmonix Russian Interstage Follower Tubes: 2 x 5670 GE USA dual triodes Output Tubes: 2 x 7044 or 5687 GE JAN NOS Five Line Level Inputs: unbalanced RCA MUTE switch and Warm-Up muting delay ALPS motorised volume control: Accurate tracking usually within 0.5dB. Smooth operation.
