Home |
Search |
Today's Posts |
#1
|
|||
|
|||
HF antenna on wooden sailboat?
Anyone have any advice on using an uninsulated stay? It is attached to wood
at each end. Thanks. Dave |
#2
|
|||
|
|||
HF antenna on wooden sailboat?
It's already "insulated" at both ends. If the wood were BONE DRY,
that would be fine. But, alas, it's not. It'll work, though, just the way it is. You'll need a good automatic tuner to go with your new SSB. I've just installed the Icom M802 HF SSB and Icom AT-140 automatic antenna tuner aboard an Amel Sharpi ketch with insulated backstay on the mainmast which comes back to the bottom of the mizzenmast, but isn't grounded, simply bolted into the fiberglass. The AT-140 is grounded to the base of the mizzenmast which has a strap to the engine straight under it. The circuit is complete to the ocean at about 2.2 ohms, measured to an independently connected grounding block under the hull. The backstay and tuner work amazingly well, considering the K index is high making HF radio quite useless. I've gotten fair signals from Charleston SC to the midwest and west on the 20 meter ham band in the daytime. We haven't had it out to sea at night, yet, which will be much better on a lower freq. This tuner will tune a 55' backstay down to 1.6 Mhz quite easily all the way up to 30 Mhz. I can't wait for a winter evening on the 160 Meter ham band (1.8-2.0 Mhz). Trying to communicate from our marina is useless. There's so much electrical noise coming from every corroded high voltage insulator under the dock it just blocks out all signals on all frequencies, even though the main power transformer on the dock is 3 docks away. The Icom works very well, in spite of some stupid, cheap connectors they used. The control connector on the antenna tuner was removed and my shielded control cable hard soldered inside the tuner's watertight enclosure where the cheapskates left out the terminal block to save 50 cents/unit. I don't think Icom ever owned a boat in seawater, hard as that is to believe from Japan, a sea country. Many stupid decisions were made in its hardware design.....like drawing salt air into the cabinet to cool the internal heat sink that should be OUTSIDE the SEALED transceiver. Idiots.....others are worse, though.... Larry W4CSC/MM S/V "Lionheart" Charleston SC On Mon, 25 Aug 2003 18:20:10 -0700, "David Wells" wrote: Anyone have any advice on using an uninsulated stay? It is attached to wood at each end. Thanks. Dave Larry W4CSC Maybe we could get the power grid fixed if every politician regulating the power companies wasn't on their payrolls. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Notes on short SSB antennas, for Larry | Cruising | |||
Sailor's tattoo, must be married too long, Wooden Boat Festival | General | |||
Icom 402 radio woes..or is it my antenna system? | Cruising | |||
Shakespeare antenna repair | Electronics |