8 8 QST Jun88 A CHEAP AND EASY MODEM (3 BOARD SET) $23.00 OSCILLATORS, VFO, BFO, ... Price 73s Oct95 DDS DREAM DIGITAL VFO USINGAD7006JP50 (IC MAIN AND SWITCH BDS) $17 ... STANDALONE DDS FREQ CONTROL $6.75 73s May94 UNIVERSAL VFO IN CARRS CORNER ... $6.00 73s Mar94 TW-1 THIMBLE WELSH DDS VFO ... 1991VARIABLE FREQUENCY OSC (FIG. 3-14) $6.25 ARRL QRP CLASSICS A BEGINNERS LOOK AT ... AND A VVC TUNED 40M VFO (QST 9/7) $6.50 ARRL QRP CLASSICS A VFO WITH BANDSPREAD ... Jan97 TUNABLE BFO FOR 455 KHZ COLLINS FILTERS BY W1FB $5.50 CQ Jun91 W1FB VFO $4.50 ... HF VFO BY FRANCESCO MORGANTINI (5 BOARD SET) $24.00 QEX Jul97 DIRECT DIGITAL ... STABILITY FOR L-C OSCILLATORS $6.00 QRPp THE CB SLIDER VFO BY MUSCOLINE $5. ... (MINI KIT) $79.00 INCLUDES P C BOARD, MC145170D2 IC, OP27GZ OPAMP, (2) 7805 ... REGULATORS, DISPLAY INTERFACE BOARD, 100 MHZ MINI CIRCUITS OSC, AND ...
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9 9 QEX Nov/Dec98 40V 8A POWERSUPPLY FOR MOSFET AMPLIFIERS. USES LM317 AND 5 ... , ECORE AND FERRITE FOR T1 AND P C BOARD) QST Dec98/Jan99 A 13.8V 40 AMP ... SWITCHING POWERSUPPLY BY MANFRED NORNHINWEG $20.50 QST Nov89 ... POWERSUPPLY DESIGN HINTS $6.00 QST Nov93 13.5V 5A. SPENCER POWER ... SUPPLY (BOARD AND MC3423P1 IC) (ARRL HB 95 FIG 11.37 ... ) $7.50 RADIO COMM. Apr96 40A POWERSUPPLY BY SPENCER $5.50 HIGH VOLTAGE DOUBLER ... PS USING TWO 6KVHV6-1 DIODES AND 8 FILTER CAPS 6" X 6" $16.50 LARGE HI-V POWER ... SUPPLYBOARD WITH 10 FILTERCAPACITORS 11"X 5" $24.00 SMALL HI-V POWER ... SUPPLYBOARDUSING6FILTERCAPACITORS 4.5" X 5" $11.00 TRIODE BIAS SUPPLY ( ...
post as receiving amp stage in the if filter makes this the best semi-qsk set ... during contests width crystal ladder filter fights unwanted easy to power it uses ... little power -qrm and noise to the maximum only 50 ... listening or calling off-frequency a pc boards in our plant rugged all-metal snap ... onto strong signals outside radio tuner power pack fasten together to choose your the ... audio bandpass mfj s form a tiny 6x6.5x8.5-in integrated cw favorite band 40 ... great volume mfj-9040 covers mfj-4114 power rugged transmitter 7.000-7.150 mhz ... motorola power amplifier pack $79.95 mfj-9030 covers ... makes sending as much fun mfj-27 $6.95 carry handle 21.000-21.200 mhz save ... yaesu ft100d kenwood ts-50 see page 6 mfj-971 $119.95 200 watt pep antenna ... tuner also has 6 watt range setting for qrp covers 1.8- ...
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radios are feature-packed tm the most powerful 12 watt radios you ll ever own hot ... on-air design real alalog s-meter powerful audio turn on your new mfj ssb ... trip the mfj transceiver microphone powersupply and antenna can easily fit into ... speech processing for an added 4 to 6 db of punch all three adventure radios ... and a 2.3 95 95 khz crystal ladder filter 319.95 with 289.95 with all adventure ... -in low pass ship code b ship code b filter to help avoid tvi mfj-9406 for 6 meters ... ragchews rate shifts or stair-stepping powerful and you can take this little set one ... can combine with your from a 2 amp ac supply 3a for the other outdoors hobby for an ... for all adventure radios mhz with power output of 10 watts pep mfj adventure ... output um quality plate-through pc boards 144.0 to 144.3 mhz quality components ...
-quiet FET post amp stage in the IF filter makes this the best CW receiver going ... : Tight CW bandwidth crystal ladder filter fights unwanted QRM and noise to the ... volume. Rugged Transmitter: Motorola power amplifier transistor delivers full QRP ... for full QSK during contests. Easy to Power: It uses little power -only 50 mA ... on G-10 double-sided plate-through PC boards in our plant. Rugged all-metal cabinet ... A Integrated CW Station Radio, tuner, power pack fasten together to form a tiny 6X6 ... .95; MFJ-971 tuner, $99.95; MFJ- 4114 power pack, $69.95; portable antenna, $39.95 ... hall-of-famer K1BQT for real world low-power operating conditions. Buy all or choose ... , low noise, sharp passband crystal filter, Differential mode AGC, rock steady, ... thru 20 Meters, 1 Watt 15/17 Meters. Power adjustable to zero, full QSK for smooth ...
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Radios MFJ-1762, $79.95. 3-element 6 Meter yagi quadruples your effective ... radiated power over a half-wave dipole. 6 foot boom, 2 lbs. Can use TV rotator ... of DX in all directions even with low power. GroundIsolated TM radial system ... radiator. MFJ-1736, $29.95. Hang this 6 Meter J-pole in the clear. Omni- ... 1/4-waves. MFJ-1776, $39.95. Low SWR 6-Meter folded dipole. MFJ-1770A, $39.95. (10 ... Meters). MFJ-906, $79.95. 6 Meter antenna tuner with lighted cross- ... , Same as MFJ-906, less meter (See Page 6). Mirage A-1015-G 150 watt ouutput 6- ... separately. MFJ-4110 Portable AC PowerSupply, $49.95, fits in your pocket and is a ... at 1.2 Amps. MFJ-4114 Rechargable AC PowerSupply, $69.95, with battry pack uses ... trip the MFJ transceiver, microphone, powersupply, and antenna can easily fit into ...
s spectrum measurement 04 noise in ic powersupply line 05 2 radiated noise from ... digital circuit boards06 noise generated by ic 06 radiated ... patterns 07 effect of emi suppression filter 08 3 radiated noise from cables 09 ... how to select and use emi suppression filters differences in noise suppressing effect ... suppression model 17 2 emi suppression filters 18 using emi suppression filters 18 ... effectiveness of emi suppression filters performance 19 how to use inductor ... type emi suppression filters 20 how to use capacitor type emi ... suppression filter 1 20 how to use capacitor type emi ... suppression filter 2 21 how to use capacitor type emi ... suppression filter 3 22 3 improved ground pattern 23 ... 5 influence of signal pattern width 29 6 influence of pwb thickness 30 7 ...
pcs improving the gnd on extension boards in case of installing an extension ... board with a cable noise may conduct to the ... radiation from the cable therefore the board s gnd must be stabilized by connecting ... impedance is low in addition emi filters are installed on the cable connector ... s metal case metal fitting gnd pattern board through hole extension board screwed to ... gnd on extension board installing emi filters on the clock lines high frequency clock ... be close to each other therefore an emi filter with high and steep attenuation is used ... currents is also generated on the powersupply line therefore a chip ferrite ... pass capacitor to suppress noise on the powersupply line chip ferrite bead ... 22 at 100mhz gate array installing emi filters on bus lines bus lines contain many ...
55 56 57 58 59 60616263646566676869 70 j1 keyboard j3 j2 display j6 11 ... 2cr-1 112 ribbon cable to digital i/o board ribbon cable rs485 1ts leaving cooler ... counter option 20 31 1sc 2sc 5 modem power outlet telephone line water temperature ... not furnished ribbon cable vo gnd ai board #2 2ts entering cooler water temp red ... blk wht 64 40 63 +5 9ai 1 gnd 3 phase voltmeter option ... condenser water temp red blk wht 64 41 63 +5 vm 1oai 2 gnd 1tb 4ts entering ... furnished not furnished gnd wht 63 l3 l3 blk 42 11ai 3 l2 l2 red 64 + ... shall be provided by installer 5 if powersupply has been interrupted for a ... minimum before starting compressors 6 do not run ct wires in wire bundles to ...
