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August 17th 16, 06:11 AM
posted to rec.radio.amateur.dx,rec.radio.amateur.equipment,rec.radio.info
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[HR360] Ham Radio: Workbench-4, Meters
Ham Radio 360 /////////////////////////////////////////// Ham Radio: Workbench-4, Meters Posted: 16 Aug 2016 04:13 AM PDT http://hamradio360.com/index.php/201...ench-4-meters/ THE WORKBENCH EPISODE 4 RF Meters, DC Power Meters, and Digital Multimeters For this episode, I made a quick and dirty video comparing several Tenma Digital Multimeters with my Fluke 287.* I compared voltage, continuity, current, and miliamp current.* You can check this out he *https://youtu.be/tl76f0S3iOU Save 5% on your next order from MCM Electronics with promo code RADIO5 http://www.mcmelectronics.com CONTEST!* Enter to win a Tenma 72-10415 Digital Multimeter (a $100 value) by visiting http://www.mcmelectronics.com/workbench and signing up for their email newsletter!* Contest ends on 8/25/2016 and the winner will be randomly selected and announced on the next episode of Workbench. Segment 1 News and Updates Update: *LM317 power supply: $5-$10 gets you a PCB with a regulator, digital display and voltage adjust pot. Just put in 3 volts more than the output. *0-30 volts typically. Ebay Link Tons of cheap kits and electronics from www.banggood.com Example: *https://blog.adafruit.com/2016/08/11...ay-3dprinting/ Icom released a new ID-51 Plus2 http://www.icom.co.jp/world/news/160...rvariation.pdf Kenwood TH-D74 http://www.jvckenwood.com/en/press/2...ss_160808.html Whats on Georges bench? Finalized the PCB for the antenna analyzer Rev 2 Gerbers are off to the PCB fab Working on D-STAR DD module with Rich KC6OBJ D-STAR stack + 2 1.2 GHz ID-1’s Goal: *Over the air TCP/IP to the repeater site PLUS 3.4 GHZ link between sites Two new IRLP nodes made from Raspberry PI’s * Thanks Dave VE3LTD One to backhaul from Black to our IRLP reflector One to backhaul from WA6HHQ in Aptos on the Central Coast Whats on Jeremys bench? Sick Raspberry Pi 2 in my cluster.* Intro to cluster: *https://www.youtube.com/watch?v=KJKhRLKXr-Q Finishing Battery Test of Bioenno Test and starting to work 3 Meters from MCM Electronics! Segment 2 * METERS Analog VOM Simpson 260 Pro Tips Hams rarely need precision, they need indication (Indicator vs instrument) Cheap Basic measurements like continuity, coarse voltage and current. Sometimes they stop working because of bad connections, components. Ebay Link $12 with shipping Have to have features Auto Ranging True RMS A/C Measurement Check max voltage and current specs Backlight Kick stand Continuity testing beep 4000 counts / 3 ¾ Digits https://www.youtube.com/watch?v=U4JFeU-o2kc Nice to have features Capacitance Diode check Transistor check Frequency counter Computer connectivity High quality probes Impact resistant / weather proof case (rubbery) What do you get as price increases? Precision “Nice to have” Features Non contact sensing Computer connectivity Accessories Power Handling Faster continuity test response Good probes Silicone insulation not cheap wire Good strain relief Flexible Sharp probe points Removable alligator clamps FLUKE TL71 10A PREMIUM DMM TEST LEAD SET FOR DIGITAL MULTIMETER PROBES NEW $18 $100 Tenma 72-7780 6000 count TRMS $60 http://www.mcmelectronics.com/produc...-7780-/72-7780 Extech… Tenma 72- 10410 $67 6000 count TRMS w/ USB $67 http://www.mcmelectronics.com/product/72-10410 ~$100 Tenma 72-10415 22000 count TRMS w/ USB Connectivity $100 http://www.mcmelectronics.com/produc...0415-/72-10415 EEVBlog Branded Bryman BM235 ~$100US https://www.eevblog.com/product/bm235-multimeter/ $300 Fluke 87V $340 Fluke 287- $450 Keysight (Agilent) U1272A $490 Clamp Current Probes Tenma $40 http://www.mcmelectronics.com/product/72-9180#review RF Power Watt Meter Difference between a RF watt meter and a SWR meter? Same thing but RF power meters may not show SWR Make sure you pick one for the frequency range and power level that you need. Requires a load! Cheaper good enough MFJ 822 (HF 2m) $60 http://www.mtcradio.com/mfj-822-watt...-300-w-mobile/ MFJ 842 (2m,220,440) $60 Diamond SX-200 (HF 2m) $90 http://www.hamradio.com/detail.cfm?pid=H0-000009 Diamond SX-600 (HF, VHF, UHF) $180 http://www.hamradio.com/detail.cfm?pid=H0-000013 Commercial grade Bird Model 43 and slugs ($300 for meter + ~$50+ per slug) http://www.birdrf.com/Products/Wattm...x#.V6tGLpgrKUk DC in-line power monitor Powerwerx Wattmeter-PP *$50 https://powerwerx.com/watt-meter-ana...e-dc-powerpole $14 clone on Ebay RC Digital LCD Watt Meter Battery Voltage Current Power Analyzer Tester Ebay Link West Mountain Radio PWRcheck $185 Many modes, programmable “gas guage”, USB for logging and computer monitoring/alerting http://www.westmountainradio.com/pro...ts_id=pwrcheck TUTORIALS Sparkfun How to use a multimeter https://learn.sparkfun.com/tutorials...e-a-multimeter Fluke ABCs of DMMs (Digital Multi Meters) http://support.fluke.com/find-sales/...16_ENG_M_W.PDF Ideal Industries Basics of Digital Multi Meters http://www.triotest.com.au/shop/imag...ultimeters.pdf EEVBlog Multimeter Videos DMM Buyers Guide for Beginners: *https://www.youtube.com/watch?v=gh1n_ELmpFI How a Multimeter Works: https://www.youtube.com/watch?v=yuCXsT3_WRE Multimeter Counts and Resolution: *https://www.youtube.com/watch?v=U4JFeU-o2kc This posting includes a media file: http://media.blubrry.com/fo_time_the...adio15/wb4.mp3 |
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