Page 14 of Audio Catalog by Michael Percy Audio

tkd stepped attenuator the best off the shelf assembled attenuator that you can buy discrete resistive elements are used for each position in a series configuration assuring very precise tracking between channels mounting is accomplished by three standoffs and screws on the front of the control so only a hole large enough for the 6mm shaft is required in your faceplate each stereo control requires a footprint 2.125 h x 1.75 w and 2.0 deep behind your front panel the shaft extends one inch beyond the back of the panel to which ithe control is mounted 40 steps 1db steps to -24db 1.5db steps to -31.5db -33.5 -37.5 -39.5 -42 -45 -48.5 -53 -58 -65db specify 10k 50k 100k or 250k impedance $249.00/stereo attenuator $169.00/mono attenuator our cost on these has doubled so we will not restock after these are gone 50k available in mono only no more stereo tkd potentiometers conductive plastic element cp2511 model attenuators and balance controls 25mm square by 27mm deep with 9mm threaded bushing mount solder lugs non-detented log taper 10k 25k 50k 100k 250k 500k $60.00/stereo $37.50/mono $66.00/balance $75.00/25k 100k motorized 15°/2db 30°/4db 45°/6db 60°/8db 75°/10db 90°/12db 105°/14db 120°/16db 135°/18db 150°/20db 165°/22db 180°/24db 195°/26db 210°/28db 225°/30db 240°/32db 255°/34db 270°/37db 285°/42db 300°/50db 315° alps black beauty potentiometers popular 40mm high end potentiometer some are detented some smooth no longer manufactured 34mm high x 40mm wide x 30mm deep 8mm threaded bushing mount 6mm d x 32mm l solid round aluminum shaft solder lug eyelets easily cut to desired length 50k/100k/250k mono potentiometer $30.00 50k/100k/250k balance controls $39.00 sorry no more stereo post available 25mm blue alps motorized pots 10k 45.00 test all tkd/alps/noble pots with clip leads first once soldered not returnable noble ap25 potentiometers excellent low cost stereo potentiometer 27mm square x 30mm deep black metal case 8mm threaded bushing mount 6mm solid round aluminum shaft not detented pc mount log taper specify 10k 25k 50k 100k 250k $19.95 noble no longer makes these so stock is limited tkd stepped stereo type shown tkd plastic tkd motorized alps motorized noble tocos toggle switches superior quality silver contact 6a/125v 3a/250v rated solder lug terminal miniature toggle switches available with short or long chrome paddle handles the dpdt on/on long paddle is also available with pc mount terminals to replace the very similar type of toggle switch found on arc amps preamps fits the same circuit board eyelet spacing short handle type supplied if you do not specify spdt on/on $3.95 dpdt on/on $5.95 dpdt on/off/on $6.50 4pdt on/on $11.50 4pdt on/off/on $11.50 ti shield unique composite shielding material from texas instruments for blocking emi rfi interference conventional shielding materials excel either in electrical conductivity or magnetic permeability but not both steel is not conductive enough to be effective at blocking high frequencies while copper and aluminum are not effective at absorbing low frequency emi no single material met both of these requirements until ti developed this copper/alloy 49/copper composite material ti shield is effective from below 10hz up to 10ghz and is currently available only in .014 thickness counterpoint utilized similar technology in construction of their chassis and found significant audible benefits were to be derived from surrounding audio circuitry with materials that shield against both emi rfi microsorb pg 18 could be used to adhesive back this material and provide mechanical damping of the chassis as an additional benefit unlike mu-metal this material may be cut and bent into convenient shapes without requiring annealing to restore its shielding properties 12 x 12 29.95 12 x 24 58.50 stillpoints ers emi/rfi suppression cloth in appearance a grey cloth like material impregnated with carbon fibes that are wash coated with metals in a proprietary process this material not only shields from and reflects emi/rfi but absorbs it so merely laying a sheet on top of or wrapping noise emitting components anything digital ac junction boxes power supplies transformers can have dramatic results even speaker drivers crossovers and turntable platters may benefit with this treatment users have reported spectacular reductions in glare hash background noise etc the polyester fabric will insulate the core of ers to some degree but can be easily penetrated with shape edges caution should be exercised when used in close proximity to circuitry see positive feedback stereo times articles 8 x 11 sheets 19.95 each free ups ground shipping 48 states for any order containing 2 sheets ers buy nine sheets get one free aq rf stoppers rf suppressing ferrite clamps to fit around power and signal cables they add 240 of impedance at 100mhz which aq claims is 40 more attenuation than the tdk and similar products jr s fit cables to 9mm $31.50/set 8 sr s fit cables to 10mm $45.95/set of 4 12.5mm id one piece emi suppressor core with heat shrink 4.95 each this is the rf stopper audioquest used on their ac-12 power cord sidewinder power resistors economical choice for speaker system crossovers useful for experimentation parallel two for higher wattages and to achieve other values 25w ceramic encapsulated wire wounds 5 axial leads .5 square by 2.5 long 95¢ each 2.2 2.7 5.6 6.8 12 15 20 25 picofarad values poly-styrene/propylene types almost all are styrene surplus from various manufacturers all copper leads most are 500/630v 2-5 a few are 10 where marked with a they are 160v 85¢ each please note that as these are surplus purchases the stock varies and values come and go as available 47pf 69pf 71pf 73pf 76pf 80pf 82pf 86pf 88pf 89pf 91pf 100pf 100pf 120pf 130pf 133pf 150pf 180pf 200pf 200pf 240pf 270pf 330pf 330pf 360pf 360pf 365pf 430pf 453pf 536pf 560pf 604pf 604pf 619pf 750pf 787pf 820pf 820pf 909pf 931pf 1000pf 1100pf 1200pf 1210pf 1300pf 1500pf 1600pf 1690pf 1800pf 1800pf 1910pf 2200pf 2700pf 3000pf 3900pf 4700pf 5600pf 6800pf 7500pf 8200pf 10,000pf 12000pf smarter speaker support a rugged glass reinforced nylon support for wall mounting speakers weighing up to 50 pounds and completely adjustable in both horizontal and vertical axis without having to release any clamps or screws two screws attach the mounting plate to your speaker and two more the wall bracket ideal for video surround sound applications and in any environment where wall mounting of speakers is desirable elegantly simple formed from low cost highly reinforced materials this is the best moderately priced support i have found two per speaker could be used for heavier applications or greater rigidity when mounting taller boxes $29.50 per pair 14

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