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NEW: Mobile Antenna Testing Results Part 1

Updates:

Oct 2004: finishing up the mobile antenna shootout

July 2004: Added antenna testing and more photos

June 2004:
Laptop crash so I decided to completely redo the site..


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	Here are my First Impressions and Mounting/Installation experience. My testing results will check if I did a good job!

Yet another problem!

So with great anticipation I started testing. What is this! SWR all over the place... finally traced it to a loose screw on the bottom of the antenna. I could not get the SWR down on 40 or 80. No problem: install the whip or top hat.. Ends up the quick disconnect is broken! The little pin out of the bottom is missing! (Do you remember the shipping container problem?) Fixed this: now let (finally) do some testing!!!! (And contact HS to see if I can get a new quick disconnect!)


	Configuration Label is a link to a detailed description below

HS1800 SWR experiments
Frequency	Configuration
	A	B	C	D	E	F
1.8-2.0	no tune	no tune
3.5	no tune	24.5
3.6	no tune	26.5
3.7	no tune	26.7
3.8	no tune	14.7
3.9	no tune	2.8
4.0	no tune	2.8
7.0	2.6	1.6
7.3	2.1	1.2
10.125	1.4	1.0
14	1.3	1.0
14.4	1.3	1.2
18.11	1.6	1.0
21.2	1.3	1.0
24.9	1.6	1.1
28.0	1.5	1.0
29.7	1.7	1.1
50	2.2	4.7
52	2.2	4.8
54	2.2	4.8


	Configuration A: This is the bare antenna as shipped. The loading coil at the bottom is as shipped slightly moved to avoid water sitting on it. You can see that 80M was unuseable, SWR above 27:1. Note that at these frequencies on one of these antennas, the Q is quite high.. so the 2:1 SWR Bandwidth is tiny! Looks like a nice tuning on 6M

Configuration B: This is the bare antenna as shipped but with the HotRodZ top hat. This has the long radials installed so that they hit the mount in the middle: effectively creating 6 short radials. you can see that 160-80M doesnt tune but I do get an ok range on 6M.. this isnt bad!. You can see that the antenna is just a bit short to tune 80M: it is SO close! Tarheel Configuratin E was a bit better though. (why?) (By the way I really should have tested using the 40M setting for 6M.. so the 6M numbers might be misleading!)


	Configuration C: Let try it with the supplied whip antenna.

MISTAKE:

I made a mistake in all this testing, I should have gone back up to 40M settings when trying 6M...


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	Copyright 2004 by Philip P. Thompson, All rights reserved.