Build Your Own Dummy Load! 250w 50ohm
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- Опубліковано 6 жов 2024
- need dummy load? build one. here is how.
How to make a Ham Radio RF Dummy load
get your resistors here: www.pcs-electr...
material used in the video: 250W resistor, spacers, so239 connector, screws and old heat sink.
you can also use N connector, it will also fit directly to 250W resistor holes.
#dummyload
#diy
#pcselectronics
Hi power resistors are on stock for your projects. Making a dummy load hasnt been so fun until now. Make a dummy load with 25, 50, 75, 100 ohms...
Great idea and well executed. I am thinking two 100 ohm resistors in parallel would provide better heat dissipation and more support for the SO-239. Thanks!
Great video, I used to use 2 150 watt light bulbs. But those are now hard to come by.
Elegantly simplistic
other good solution is using a PC ventirad with a TDP near 250W for a simple raison, heat will be better evacuate by a ventirad which is the job.... and for less than 50€ ils possible... If power is not applied with a cyclic level up to 50%, un simple ventirad 125W low cost is fine.... And a copper ventirad is better with caloducs.....
That's such a great idea 🙏
Thank you!
Hey the thin tab on mine broke flush off while I was wiping some heat grease off. Any ideas what to do? Thanks
sorry to hear that. there is nothing you can do. Resistor has to be changed.
@@PCSelectronics i fixed it by removing the top white slice with the lettering and soldering a thin tin tab to the what was left of the broken tab then crazy glue the slice back on top. Resistance did change however from 51 ohm to 58 ohm. tested it on my cb radio & amp outputting 240 watts. No problem. I have it mounted inside a metal electric outlet box with a metel cover and 4 holes punched out. Straight Solid copper wire from resistor to center of pl259 on the opposite side of it. Would have ordered a new one but it take a month for delivery from China
@@gabrielM1111 great news.
Remove top ceramic cover and sold thick wire on the edge!
@@s56a Mario great advice.
i want to make my own dummy load ,but i dont know how to make my dummy load support 0-3Ghz Frequency?pls tell me
Buy a resistor for 3Ghz. 😉
any link pls
Do you have a test video?
i think there is no need for it.
I'm not sure, too hard to make it.
You can allways buy one 😉
Who is the audio track by?
I forgot :) made the video in movie maker and throw in the free music from yt.
Lemon and Lime by Michael Flory- according to Siri
Would be better in a box, seems exposed, weak mechanical construction
It would be better in a box. Sometimes you just need to keep it simple. But feel free to put yours in a box ;)
Ironically, I'm building the exact same thing with a very similar heat sink 😆, although my heat sink is a bit uglier. I'm not sure I can find spacers in my town though. How long of a wire would you recommend between the resistor and SO 239? I've read too long of a wire creates inductance?