[Elecraft] Cheap 'n Dirty HF to 440MHz Dummy Load

Sat Sep 20 17:46:01 2003

Tried the link Tom included in his note - it didn't work.  Used
http://www.qsl.net/n0ss instead.
Sorry Tom, I just couldn't resist.<G>

73,
Don W3FPR

----- Original Message ----- 
From: "Tom Hammond" <[email protected]>
To: <[email protected]>
Sent: Saturday, September 20, 2003 5:07 PM
Subject: [Elecraft] Cheap 'n Dirty HF to 440MHz Dummy Load

| Hi folks:
|
| Well, we beat it around a while back on the reflector... the subject of
| building a low-cost, 50-Ohm (resistive) high-accuracy QRP dummy load.
|
| Today I built mine and thought you might like to read a bit about it.
|
| A few early impressions... many of my projects are just 'ho-hum', but this
| one's WOW!
|
|    50-Ohms (well OK, 50.34 Ohms), and essentially NO
|       reactance detectable from HF thru 440 MHz.
|       SWR = 1.1:1 from HF thru 440 MHz.
|
|    25W-30W for more than just a couple minutes with
|      no axillary cooling required unless you really
|      drive it long and/or hard (say 100W)
|
|    Total investment, about $10 (US), including shipping
|      of the parts from the parts house, LESS if you
|      already have the coax connector.
|
|    EASY to build using hand tools.
|
|    Use a discarded heatsink from a dead PC CPU...
|      the larger the better, within reason.
|
| The article, a 600kB PDF (PLEASE DOWNLOAD and read off-line!), is
available at:
|
|    http://qsl.net/n0ss
|
| I hope the project fits someones fancy pocketbook.
|
| 73,
|
| Tom   N0SS
|
|
|
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