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Hi Bill it's true ! never skimp on such useful and simple tools! But ... if you want to build this accessory too, use suitable resistors built for RF, today you can find new ones for a few dollars !!!

hello Here, dunny load in a?converse box with linseed oil http://www.on6tn.be/Articles/Dummy_Load.pdf cdt

Hello, I will change my quartz filter on my home Ubitx. I will go from 12MHZ to 11.59 MHZ. I tested about 20 quartz. To compare and cross to my results, what are the 8 best for you? 8 numbers! The

Hi, Even though I have only 100 watt output class transmitters as my biggest guns here I have almost never run more than 75 watts. Several of my transmitters will not put out even close to 100 watts

Careful! Al and I experimented with 500W units, putting only 100W into it. Within a few seconds, the top half of the resistor went into low-earth orbit. Even at 1/10 the rated output, you need a

Yes, you can.? MFJ sells a "cantenna" type of dummy load and teardown on it stated that the resistor looked the same as the one in the dry dummy load. https://mfjenterprises.com/products/mfj-250

You need a pretty serious heat sink to dissipate 500W though! I'm planning to try doing a 100W one with a leftover CPU cooler to get rid of the heat. That should give me a relatively compact dummy

My pick, Easily available on the 'bay for a few bucks! from a few watts to kilowatts are available. All you need is a heatsink. Emacs!

For anyone interested, here is the parts kit for the timer: CJKIT-21536: Jameco Kitpro : Parts Kit for The Ultimate Beginner's Guide to the 555 Timer Book : Electronic Kits & Projects | | | |

I wondered the same thing IF I got the MFJ dry dummy load. I don't see any reason why you can't but it might get messy. If I did it, I'm place the dummy load into the container of oil vertically and

This is a little off the topic but I have a 100 watt dry load from MFJ. Can I submerge it in mineral oil to help it handle it’s rated input for longer? Or should I build a new load? I could also

It’s almost identical to the Hycas AGC circuit that was published in QST several years ago. MRM Sent: Saturday, October 31, 2020 6:47 PM To: [email protected] Subject: Re: [BITX20] AGC circuit to

Found it here: https://www.aliexpress.com/item/32966376132.html But, what value did you use and what value? K4EAA offered a set of resistors that I used in a Lowes empty quart can and mineral oil that

Good info. But when you build one of those in the image, I suggest that you leave the leads long since they help dissipate the heat. Bob — KK5R

This is from Jameco. Should be interesting... The Ultimate Beginner's Guide to the 555 Timer | | | | The Ultimate Beginner's Guide to the 555 Timer An easy-to-follow book teaching how the 555-timer

Unfortunately, the files actually aren't on the listed group.? They are, however, in the files section of the JackAl group.? One has to be a member of the group to access the files, but membership

Looking at David's aliexpress listing, it says they are "carbon film". A google search of "carbon film vs metal film" says metal film is more stable, if that matters. And says there's lots of

David: If you just use 32966376132 in the Ali search bar, it finds the item. Jack, W8TEE

I have been using these for my dummy loads and they have been pretty darn surprising.

Good grief...didn't know! Jack, W8TEE