[Elecraft] Difference in dummy loads

I need to purchase a dummy load for use with my K2/100. What's the difference between a dry dummy load and an air cooled dummy load? Which is better? Thanks, Mike NJ2OM -- Sent from: http://elecraft.365791.n2.nabble.com/ __ Elecraft

Re: [Elecraft] Difference in dummy loads

An air-cooled dry dummy load is just fine for 100 W. I like the Oak Hills Research RFL-100 kit. $50 and easy to build. It uses twenty 5 W resistors. http://www.ohr.com/rfl100.htm I wrote up my build of that kit here. https://observer.wunderwood.org/2016/12/31/building-a-dummy-load/ If you want

Re: [Elecraft] Difference in dummy loads

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Re: [Elecraft] Difference in dummy loads

Basically the same thing. I suggest the Vectronics DL-650 (dx engineering) or a commercial pull from Ridge Equipment. For serious testing, I fire up my 2GHz, 6kW water-cooled dummy load--louder than 10 KPA-1500s on PCP. Always get more capacity than you need. --because you'll need it later. If

Re: [Elecraft] Difference in dummy loads

A dry dummy load is good for up to its power rating - but do not exceed that rating. The air cooled dummy loads not only require power for the fan, but may be over-rated for their power spec. I prefer dry or oil immersed dummy loads. A good dummy load should present a 1.0 SWR for all the band

Re: [Elecraft] Difference in dummy loads

The difference between a "dry" and an "air cooled"? I think they are the same. The difference is with "oil cooled". Heathkit used to sell a "Cantenna" which was a dummy load in a gallon paint can. Add your own transformer oil. IIRC it was rated for a KW for a short period. Ken WA8JXM On Wed,

Re: [Elecraft] Difference in dummy loads

I have a MFJ-264 which is rated for 100W more or less continuously and 1500W for 10 seconds. It seems to work within its specs. I've used it at up to 1KW or so. I assume it is like most MFJ equipment, it does what it is specified to do, but don't push it even a little bit beyond. 73 Bill AE6

Re: [Elecraft] Difference in dummy loads

Hi Mike, Don't over-think this one. For 98% of us hams the MFJ dummy loads will work fine. The MFJ-260C is rated at 300 watts and sells for $50. The MFJ-264 is rated for 1500 watts (an Ohio vendor sells it for $80) if you think an amplifier is in your future plans. 73, Mitch -- Sent fro

Re: [Elecraft] Difference in dummy loads

I ordered the MFJ-260C. Thanks for all the replies! Thanks, Mike NJ2OM > On Jul 2, 2020, at 6:44 AM, NW0M wrote: > > Hi Mike, > > Don't over-think this one. For 98% of us hams the MFJ dummy loads will work > fine. > > The MFJ-260C is rated at 300 watts and sells for $50. > > The MFJ-264

Re: [Elecraft] Difference in dummy loads

> On Jul 2, 2020, at 3:42 AM, NW0M wrote: > > Don't over-think this one. For 98% of us hams the MFJ dummy loads will work > fine. > > The MFJ-260C is rated at 300 watts and sells for $50. Looking at the rating curve in the manual, that is 300 W for 30 seconds or 100 W for 90 seconds. For $

Re: [Elecraft] Difference in dummy loads

I bought an air-cooled Bird 8201 rated 500w to 3-GHz from e-bay for $300. It can handle 1500w for short transmissions. 73, Ed - KL7UW http://www.kl7uw.com Dubus-NA Business mail: dubus...@gmail.com __ Elecraft mailing list Home:

Re: [Elecraft] Difference in dummy loads

Buyer beware. I bought a superb, almost new, almost unused Bird 8141, in its original box and it failed after a short while. Taking it apart it was obvious that it had been well and truly cooked. It must have been hammered. The main connection had corroded and separated from the element. I