Fisher 800 B Owners Manual
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Page 1
I ITH your purchase of a FISHER in rument you have com - w pleted a chain of events that began niany nionths ago, in our rewnrch Inhoratories. For it is there that thc basic concept of the equipment you have just acquired came into being - its appearance. its functions, its quality of performance. its convenience of use. But the end step - your purchase - is merely ;i beginning. A door has now opened, for you and your family, on virtually unlimited years of musical enjoyment. Recognizing that one of the keys to pleasurable ownership is reliability, we have designed this instru - ment to give long and trouble -free service. In fact, instruments we made over twenty -three years ago are still in use today. Remember always that we want this equipment to give you the best performance of which it is capable. Should you at any time need our assistance toward that objective, please write me personally. AN IMPORTANT SUGGESTION Many hours have been spent by our engineers *and technical writers to create this instruction book for your guidance and enjoyment. If you want the musr out of your FISHER, there is only one way to obtain it. With the equipment before you, please read this book - let carefully. It will be time well spent! . Fourider and President 1937 1931 1931 1938 1938 1939 1939 1939 1945 1948 1949 1952 1952 1953 First high -fidelity sound systems featuring a beam -power amplifier, inverse feedback, acous- tic speaker compartments (infinite baffle and bass reflex) and magnetic cartridges. First exclusively high fidelity TRF tuner, featur - ing broad-tuning 20,000 cycle fidelity. First two-unit high fidelity system with separate speaker Prtclosure. First coaxial speaker system. First high fidelity tuner with amplified AVC. First Dynamic Range Expander, First 3 -Way Speaker in a high fidelity system. First Center-of-Channel Tuning indicator. First Preamplifier -Equalizer with selective pho - nograph equalization. First Dynamic Range Expander with feedback. First FM -AM Tuner with variable AFC. First 50-Watt, all-triode amplifier. First self -powered Master Audio Control. First self-powered, electronic sharp-cut-off filter system for high fidelity use. - Milestones In the History of High Fidelity Reproduction 1953 1953 1954 1954 1955 1955 1955 1956 1956 1956 1956 1956 First Universal Horn -Type Speaker Enclosure for any room location and any speaker. First FM -AM Receiver with a Cascode Front End. First low -cost electronic Mixer-Fader. First moderately -priced, professional FM Tuner with TWO meters. First Peak Power Indicator in high fidelity. First Master Audio Control Chassis with five- position mixing facilities. First correctly equalized, direct tape -head mas - ter audio controls and self -powered preamplifier. First to use Power Monitor in a home amplifier. First All-Transistorized Preamplifier -Equalizer. First dual dynamic limiters in an FM tuner for home use. First Performance Monitor in a high quallty amplifier for home use. First FM -AM tuner with TWO meters. 1958 1959 1959 1959 7 960 1960 1960 1960 1960 First Stereophonic Radio-Phonograph with Mag netic Stereo Cartridge. First high -quality Stereo Remote Control System. First complete Stereophonic FM-AM Receiver (FM- AM tuner, audio control, 40-watt amplifier). First high -compliance plus high-efficiency free- piston speaker system. First to use MicroRay for FM tuning and as a Recording Audio Level Indicator. First complete stereo FM -AM receiver with 60- I watt power amplifier and new 7591 output tubes. Smithsonian Institution, Washington, D.C., accepts for its collection Americas first commercially manufactured high fidelity radio-phonograph, made by Avery Fisher in 1937. First reverberation device. for use in high fidelity equipment - The Fisher Dynamic Spacexpander. First stereo tuner with MicroTune. I I 1956 First complete graphic response curve indicator 1960 First FM tuner with six IF stages. 1960 First FM tuner with five limiters. 1957 First Golden Cascode FM Tuner, 1960 First front panel antenna selector switch, 72-300 1957 First MicroRay Tuning Indicator. ohm, Local-Distant positions. for bass and treble.
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L THE FISHER 800-6 ST E REOPHO N I C FAA -AM and Multiplex Receiver I~E vixy LATEST TECHNIQ[~ES in audio eiigiricering design have T ticen incorporated in the FISHER 800-23, resu!llng in a stereo- phonic rc-c.c.iver of truly outstanding quality which i, irtually ob- solescence -proof. With the addition of a pair of Ypeakers and a record player, the 800-B. with 65-watts of hlusic. Power, becomes the nucleus of a complete high -fidelity spteni u~iw I paised in scope of feature. and quality of performance. The 1300.13 is capable of reproducing both FhI-.4hl stereo broadcasts and tht. new FM multi - ples Ltcreo-icithout the need for adding exlerritrl cidaptors of any kind. Ihc F\I tuning indicator ran also be used as a Stereo Beam indicator. signalling instantly when the station tuned to broadcasts n multiples ztertto program. A special noise filter ih included, which has no vffect on the freqnenc.y rangc of the riiiiltii~les program. lh e ti i g h 1 : ;en si t 1 ve I: i I t 11 n e r u t il i zcs w i de- t )a 11 ri d t C. 1 g n t h rougho u t tn ci~-ill~~t uriparallelr~ti irredniii from distortion nnci superb per - fo: manw on FJi multiplex programs. rhv : 11 t iii1ti includes a tuneci RF mi)lifier for estra sensitivity and eithc.1 broad or sharp handwidth for maximum fidrlity on local stations without sacrificing selectivity and sensititsity when receiving conditions are more dif- ficdt. The blaster ,4udio Control of the 800-8 includes the: full range of functions found on elaborate professional installations, including such features as sharp cut -off Low and High filters, Tape! hlonitor facilities. nnd a Phase Reverse switch. The final link in this chain of superbly engineered, integrated audio components is the dual -channel 65 -watt power amplifier, capable of driving the most inefficient loudspeakers to full room volume with ease. The remarkable performance of the 800 -B is assured for many years to come ly the craftsmanship arid careful attention to every detail of manufacture which have made FISHER quality famous. We tire qure that your appreciation of the 800-R will grow with time, as it handles P1er-y miisicnl assigriment with that degree of perfection that only n top -quality electronic instrument con provide.
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TABLE OF CONTENTS INSTALLING THE 800 -6 FOR THE MAN IN A HURRY OPERATING THE 800 -B CUSTOM MOUNTING INSTRUCTIONS TECHNICAL SPECIFICATIONS PAGE 3 7 8 13 15 A NOTE ON STEREOPHONIC SOUND IEH~.:OI~~IC~~~IC: SotiRD is a ginnt step forwutd in the history of high S fidelity music reproduction. This unique dual -channel system offers a distinct ad antage over monophonic (single -channel) systems becaiise of two iniportant audio characteristics: the dimensions of direction and clvp~h. These live sound qualities are for the most part missing in nionophonic systems because recoidings are made and re- produced over a single channel. This is somewhat analogous to listen - ing to niusic with one ear. Stereophonic recording techniques, how - ever. utilize two separate banks of microphones, positioned in the left and right sections of the orchestra. In this arrangement, the micro - phones detect the musical sounds in much the same manner as the two ears of a listener. The sound picked up by each bank of micro - phones is then ied to independent channels and recorded on disksor tape, or transmitted ovCr scporote channels of a stereophonic broadcast. To reproduce stereophonic realism in the home, two separate sound channel.; lire required to achieve the stereophonic effect. The stereo sound output of n rer*ord player, tape recorder or tuner is fed to two sepnrate anniiliher c.hannel\. which in turn drive two separate speaker q-stems-. IIiu+. instruments lorated on the left side of the orchestra are hcarti [It cdominaritly in the speaker to your left: instruments on the right side of the orchestra are heard predominantly in the speaker to pour right: Jvhile instruments located in the center appear to be heard midway between the two speaker systems. The result is a star - tling sense of presence such as is normally experienced only at a live orchestral performance. FM MULTlPLEX STEREO M BROADCASTING has a frequency range far in excess of the normal F henring range. For esampIe, Fisher wide -band tuners have B frequency range which extends to 75 kc, while the normal hearing range does not exceed 17 kc. This extra space in the frequency
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,:* L iONF cn A 1ONC Vl6 CM B FOHER AMPLIFIER CH A PC)WER AMPIIFIER P a FWSE INVERTER In addition to its funrtion as an FM Tuning Irldicator, the left AlicroKiay is also uFed as the Stereo Ream indlc ator for FM multiples reception. With the Selector switch in thr. AIPX FILTER or hIPX STEREO position, the dark area in the center of this indicator will become considerably narrower wheiie cr a multiplex stereo program is broadcast. During ordinary rnoiiophonic trans - missions. only the left and right edges of the inclivutor will be bright. To find a multiplex progran~. place the Selwtor witch in the hlPX STEREO position and tune across the bnnd until the two 11 FIGURE 2. lube layout. bright portions of the Stereo Beam widen, indiating a multiplex program. For fine tuning, turn the Selector to FRI and turn the FA1 Tuning knob until the dark Iinnd on the FM MicroRay Indicator is narrowest. When this has been done, turn the Selector back to the hiPX STEREO position to receive the multiplex program stereophonically. Due to the nature of the multiplex system, the noise level of a monophonic program will he somewhat higher when the Selector is turned to MPX STEREO or hlPX FILTER. For this reason, we I i I I i i I
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CUSTOM MOUNTING INSTRUCTIONS Installation with Cleats To jrrox idc. udcyucitc \c.iitil'ition to the tiiidc~r~idt~ of the chassis, it I< advisable to niourit the 800-B on ~voodc~i cleats which are fa-tr.tic.d to tht floor of the cabinet. For this installation, proceed as follows: 1- Obtain a atrip of wood :!,; inch qiiare and 26 inches long. Cut this strip in half to form two 13-inch c*Ients. ?-Fasten the two c.le,~ts to the top of the mounting board with wood screws in tlip Iio5ition shown in Figure 3. Screw heads should he flii41 with the top of thr blvats. The11 locate and drill four 1 ;-inch Iiolr4 tlii oiigti the mounting board arid cleats as indicated. 3-Saw a riitorit throiigli tli~ front panel of your cabinet to the tliiiieii+ioii+ 4int+ 11 iii Figure 1. The distance betveen the top sur- fare of the niorintiiig hoard and the bottom of the cutout must be the 5iinie ns the hvight of tht. cleats. +---Insert the 800-R (*hawis through the front of the panel cutout. Slide the chassis into the cabinet until the back of the control imnel is tight against the panel of the cahinet. 5- Insert the four I1h-inch scrtws supplied in the accessories bag through the holes in the hottoni of the mounting board and fasten the chassis into place. 13 Flush Installation If the height of the custom c-ahinet will not permit you to mount the 800-B Iiy niraii+ of cleats. a- described in the preceding section, the rha.;sis nia! he mounted dirtwly on the cahinet shelf. If the rhasqir is rnountrd in this way, howe\er. it is essential that cutouts tw made 111 the ihelf as shown in Figure 3, and that the back of tli~ c-at)inct rcmnin conipletely open. in o~dt-r to provide proper veritilntion. For a fl usli-moiinted installation, proceed as follows: 1- Locate and drill the four */j-inc.h holes in the bottom shelf of the custom cahinet as indicated in Figure 3. I .;)-Saw cutouts iii the liottom shelf following the outlines shown in