[Elecraft] Fw: Don't have a 50W dummy load

[Brian -]

I think I have a roll of 12 Ohm 2w resistors at home.  If you use 9 in
series and 8 in series, then connect those two stacks in parallel, you will
get 50.8 ohms, and I think about 20w of power handling...not sure on the
power...if someone wants to run that through the Cray and get the exact
number, I'd be thrilled to know it.

I will give away a set of 17 resistors to anyone that mails me a postage
paid, 4 by 6 inch, padded envelope.  I think two stamps will do it...maybe
three if you are having doubts.  I have used these in homebrew dummy loads
and crammed it in a Altoids tin....you need to supply a connector and the
Altoids tin.

My address is good on QRZ...

BUT WAIT UNTIL I GET HOME TONIGHT TO MAKE SURE I STILL HAVE THEM.  The
spool had about 400 on it...so I hope I have it.  I'll post again tonight.

73 de KB9BVN
Brian Murrey


On Thu, Mar 26, 2015 at 2:26 PM, Richard Solomon <w1ksz at earthlink.net>
wrote:

> You can often find Dummy loads at your local Ham Flea. I found two 50 Watt
> Birds
> for $10 each at the last one.
>
> 73, Dick, W1KSZ
>
>
> On 3/26/2015 11:15 AM, Fred Jensen wrote:
>
>> Mine works fine at 220, VSWR on 440 is about 1.3:1 and rising fast.  On
>> the QRP one I made, I left about 1" leads on the resistors, I had a small
>> brass tube to connect the center conductor down to the bottom plate and I
>> didn't want to cut it.  VSWR on 6 meters is 1.6:1.
>>
>> 73,
>>
>> Fred K6DGW
>> - Northern California Contest Club
>> - CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015
>> - www.cqp.org
>>
>> On 3/25/2015 8:13 PM, Charlie T, K3ICH wrote:
>>
>>> Yes, but the inductances are all in parallel.  I built a decent dummy
>>> load out of 24, 1200 Ohm, 10 watt wire wound resistors all in parallel
>>> between two squares of fiberglass PC board.  The SWR was only about
>>> 1.2:1 on 15 Meters and about 1.5:1 on 10 meters.   Admittedly, not a
>>> perfect load, but certainly adequate for the low bands just to soak up
>>> some RF.
>>>
>>> 73, Charlie k3ICH
>>>
>>>>
>>>> If you're going to use the paralleled metal film resistor construction
>>>> method, be sure to keep the resistor leads short and spaced them from
>>>> each other.  Lead inductance will start to become a factor on 6 m and
>>>> up.  I built mine with 40 2K 2W resistors and it works find at 100W if
>>>> used intermittently.  It's air cooled.  Don't know how much putting it
>>>> in oil would improve the dissipation.
>>>>
>>>
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-- 
73 de KB9BVN
Brian Murrey