Para Dynamics PDC 50 DL Dummy Load

The Para Dynamics dummy load could handle up to 100 watts. The oil can type dummy load had the same inards. Carefully scraping the powder coating around the input connector, drilling the rivets and scraping the powder coating where the top and bottom meet, would allow for frequency use up to 500MHz with a 1.76:1 SWR.

Here are the non-modified results.

Frequency	SWR
1.8-20MHz	1.02
21-28MHz	1.05
54-146MHz	1.09
225MHz	1.30
300MHz	1.33
350MHz	1.62
400MHz	2.06

*Here are the modified results*

Frequency	SWR
1.8MHz	1.0
28.5MHz	1.05
54MHz	1.09
146MHz	1.11
225MHz	1.30
450MHz	1.76
500MHz	1.76

Resistance vs. SWR

Resistance in ohms +/-	SWR
50	1.0
49/51	1.02
46/54	1.08
45/55	1.1
40/60	1.2
30/70	1.4
25/100	2.0
12.5/150	3.0

i.e. 49 or 51 ohms equals 1.02:1 SWR. For every ohm SWR changes in value .02 +/-