air vs oil dummy load ?

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BOOTY MONSTER
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air vs oil dummy load ?

Post by BOOTY MONSTER » 24 Aug 2018, 17:15

what's your thoughts or experiences on using a air vs a oil cooled dummy load for 1k pep ? looking at the MFJ 264 air vs the ameritron ADL-1500 oil included . both are $75 american .

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Auldgeek
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Re: air vs oil dummy load ?

Post by Auldgeek » 24 Aug 2018, 18:31

The obvious difference is cooling. Your typical heatsink clad resistive load will only dissipate so much heat before it starts to breakdown and will need longer periods to cool down.
Oil cooled loads will allow longer periods at higher power and offer shorter recovery times. Air cooled loads are a bit easier to use and dont require topping up of oil. Yes, it does need changing over time.
All depends on how much power you intend to run and for how long. Both will do the job if rated correctly.
Auldgeek - Drew
Amateur Callsign GM0BRJ
Tango Mike Callsign 108TM144

I've changed radios that many times, I've forgotten what I have :think:

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ch25
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Re: air vs oil dummy load ?

Post by ch25 » 24 Aug 2018, 18:34

I use air cooled. 6kW dk, it's warm, but not too much.
Chris
You can't have too many antennas...

madscot
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Re: air vs oil dummy load ?

Post by madscot » 11 Sep 2018, 17:09

I like my Oil filled MFJ paint can. But either will work fine, but as others mentioned, it depends on the heat dissapation you want.
Andrew

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Unit 148 Mobile
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Re: air vs oil dummy load ?

Post by Unit 148 Mobile » 28 Dec 2018, 13:06

25,

Which make & model may I ask?

I need a good load for a 1500W PA.

Unit 148 mobile

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ch25
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Re: air vs oil dummy load ?

Post by ch25 » 28 Dec 2018, 13:18

Russian military transmitter dummy load. I don't think you could buy that outside EU.
Box with nr 16 on it. http://radioklub.ceskasit.cz/Technika/original/R140.jpg
Chris
You can't have too many antennas...

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