Another option is to use the 30W, TO-220 style thick film resistors from
Caddock. Mouser sells them. They are available for 50 ohms, are 1%
precision and non-inductive... and are also very good. If you mount them
on a TO-220 style heat sink and solder the whole mess to a PL-259 they
will easily handle 5W... more if you use a bigger heat sink. Another
choice would be the Panasonic 3W 5% metal oxide resistors that DigiKey
sells... you could bundle several to get 50 ohms +/- a few percent and
solder them to a PL-259.
I have used both with good success.
Larry N8LP
www.telepostinc.com
"Home of the groundbreaking LP-100 Digital Vector Wattmeter"
Jim Lux wrote:
> At 10:37 AM 8/16/2006, Larry Phipps wrote:
>> An excellent source of quality dummy loads is
>> http://ridgeequipment.com/store/page1.html
>>
>> Check out the 75W ones for $9.00. I have checked these out on my HP
>> VNA and they are excellent. Only drawback for you is that they use a
>> N connector, but they have others. Most really good attenuators and
>> dummy loads use N connectors (or BNC).
>
> excellent.. I don't need "excellent" attenuators, just ones that are
> reasonably stable and can absorb a few watts of power. They are
> hooking up to something with SO239s, but adapters aren't out of the
> question.
>
>
>> Larry N8LP
>> www.telepostinc.com
>> "Home of the groundbreaking LP-100 Digital Vector Wattmeter"
>>
>>
>>
>> Jim Lux wrote:
>>> I'm looking for inexpensive HF dummy loads for a phased array
>>> project. They only need to handle 10 Watts or so, and preferably
>>> would have PL259 connectors on them (as opposed to SO239).
>>>
>>> I have a few of the $40 MFJ260's (25W continuous rating) and they're
>>> in the ballpark, but since I need a bunch of them, I'm looking for
>>> something less expensive, if it exists.
>>>
>>> Just looking aroundn for other sources of such things.
>>>
>>>
>>> _______________________________________________
>>>
>>>
>>>
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>>>
>>>
>>>
>>>
>
>
>
>
>
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