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Discussion in 'Amateur Radio Antennas' started by Mudfoot, Mar 10, 2013.
And what's up with Larsen magnet mount bases only having 12' of coax?
Slapped my old K40 trunk mount back on for now.
The instructions for mine call for cutting the whip for different frequencies and a cutting chart is supplied. If SWR is lower on channel 1 than 40, try cutting 1/2" off and check again.
Here is what we use instead – the Larsen NMO34 system. The Larsen NMO34 system uses the Larsen NMO34 coil, a 64” whip and a spring to provide a high efficiency and high performance antenna that compares favourably to the Wilson 1000 series. The total length of the antenna is approximately 70”. It works exceedingly well, and with over 15 users locally in the Ottawa area, we have rave reports and excellent results.
The antenna is NOT normally commercially available, but must be custom ordered . You will need the following parts: the NMO34 coil (NMO34B) the 64” whip (W-640B) and the spring (SPRINGB). This can be ordered from any Larsen dealer.
Finally, it is compatible with all Larsen NMO mounts, so you can swap it out with any Larsen NMO-type VHF antenna.
most of the new wilsons for the past 5 years or so have to be cut 1/4 to 3/4 of an inch to get a 1.1 swr . the usally tune very low but below 27mhz stock , until you cut the whip down a few .
I ordered both coils (NMO30, NMO34 and 2 whips. Looking forward to see how they perform. Don't feel like messing with the newer Wilson's.
I had a larsen antenna mounted on my 76 jeep Cherokee and I did great on skip talk to Australia Florida Texas Alaska Hawaii with no amp I thought it did quite well on skip/dx