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May
17th
Sun
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Coax cables

Re: Sizes of coax cable

Posted by: “bill maclane” billmaclane@yahoo.com billmaclane

Sat May 16, 2009 4:14 pm (PDT)



Depending….at one time most all CATV installations were with RG-59 which is 75 ohms.
Newer CATV installations generally use RG6 or RG6X because it has better sheilding (quad on the X) and is more suited for HDTV.  It is also 75 ohms.

Radios are designed for 50 Ohm.  The mismatch will cause some loss, but I’d use LMR400 or RG-213, Belden 9913 or 9914 or the flex versions.  I use more RG213 than anything since it has low loss and is cheaper and easier to use than the 9913.

73,
Bill
AI4WM

May
7th
Thu
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Apr
24th
Fri
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The Dutch barque EUROPA left her overnight berth in the Simon’s Town Outer Harbour at 11h00 hrs on Tuesday and, most unusually, without tug assistance made her way into the Still Water Harbour under her own auxiliary power, reports David Erickson. “With twin screws and a bow thruster at her disposal I guess she is pretty manoeuvrable, and the weather conditions were dead calm. The first picture was taken at 11h40 hrs and the second one at 13h53 hrs – the Dockyard Crew run a slick operation here at Simon’s Town!“It is however somewhat strange to see masts, yards and furled sails in amongst the modern naval paraphernalia of stealth technology!” Pictures by David Erickson

The Dutch barque EUROPA left her overnight berth in the Simon’s Town Outer Harbour at 11h00 hrs on Tuesday and, most unusually, without tug assistance made her way into the Still Water Harbour under her own auxiliary power, reports David Erickson.

“With twin screws and a bow thruster at her disposal I guess she is pretty manoeuvrable, and the weather conditions were dead calm. The first picture was taken at 11h40 hrs and the second one at 13h53 hrs – the Dockyard Crew run a slick operation here at Simon’s Town!

“It is however somewhat strange to see masts, yards and furled sails in amongst the modern naval paraphernalia of stealth technology!”

Pictures by David Erickson

Apr
15th
Wed
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The coastal sea fishery patrol vessel VICTORIA MXENGE seen off Cape Town harbour. Picture by Ian Shiffman

The coastal sea fishery patrol vessel VICTORIA MXENGE seen off Cape Town harbour. Picture by Ian Shiffman

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Modern Mombasa

Modern Mombasa

Apr
1st
Wed
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The sailing ship CONCORDIA arrived off Cape Town yesterday for a short visit, during which she will take on a small group of young South Africans as crew for the next leg of her voyage (see yesterday’s News Bulletin for details). Picture by Aad Noorland

The sailing ship CONCORDIA arrived off Cape Town yesterday for a short visit, during which she will take on a small group of young South Africans as crew for the next leg of her voyage (see yesterday’s News Bulletin for details). Picture by Aad Noorland

Mar
31st
Tue
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A recent view of the widening and deepening project at Durban harbour, where the north breakwater has been rebuilt approximately 100m further north of its old location providing a much wider entrance channel of 222m width and a maximum depth of 19m shallowing to 16m inside the harbour. Construction and dredging is due for completion by early 2010. Picture by Steve McCurrach http://www.airserv.co.za/maritime.htm

A recent view of the widening and deepening project at Durban harbour, where the north breakwater has been rebuilt approximately 100m further north of its old location providing a much wider entrance channel of 222m width and a maximum depth of 19m shallowing to 16m inside the harbour. Construction and dredging is due for completion by early 2010. Picture by Steve McCurrach
http://www.airserv.co.za/maritime.htm

Mar
17th
Tue
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The South African Navy tug UMALUSI (displacing 315-tons, built 1995) seen in Simon’s Bay recently. Picture by Trevor Jones

The South African Navy tug UMALUSI (displacing 315-tons, built 1995) seen in Simon’s Bay recently. Picture by Trevor Jones

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DEAT seizes illegal shark fins off Taiwanese fishing vessel in Cape Town harbour

DEAT seizes illegal shark fins off Taiwanese fishing vessel in Cape Town harbour

Officials of the Department of Environmental Affairs & Tourism (DEAT) raided a Taiwanese fishing vessel in Cape Town harbour at the weekend and seized almost two tonnes of dried shark fins.

The fishing vessel CHIEN JUI 102 has earlier entered port. DEAT officials who went on board laid charges against the vessel’s master and crew of 26 of providing false information about their catch and confiscated the entire catch.

In terms of local regulations the number of fins must match the number of shark carcases found on board any fishing vessel – this is to prevent fishing boats from catching sharks, hacking off the fins and throwing the fish back overboard, often whilst still alive, where they either bleed to death or are attacked by other predators.

Shark fins are considered a delicacy in the Far East where they are used to make shark fin soup.

According to DEAT the Chien Jui 102 had a permit which indicated they had taken 100kg of shark fin, 2.2 tonnes of shark trunk and 2,945-kg of tuna on board. An inspection of the ship however revealed the vessel to be carrying two tonnes of shark fin, which by calculation meant they ought to have had nearly 30t of shark trunk to match.

According to DEAT the Taiwanese vessel will be blacklisted for illegal, unreported and unregulated fishing and will have to remain in Cape Town harbour until the end of the consequent court case.

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The Dnepr type freighter PRECIOUS (12,296-gt, built 1982) made an unscheduled call at Durban over the recent weekend on tow behind the the offshore tug SMIT MADURA. Earlier the general cargo ship had broken down off Shelley Beach on the KwaZulu Natal South Coast. Picture by Trevor Jones

The Dnepr type freighter PRECIOUS (12,296-gt, built 1982) made an unscheduled call at Durban over the recent weekend on tow behind the the offshore tug SMIT MADURA. Earlier the general cargo ship had broken down off Shelley Beach on the KwaZulu Natal South Coast. Picture by Trevor Jones

Mar
3rd
Tue
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Dialer for Hermes Tytyn

This long vexed problem is now solved with the Helmi Touch Dialer found at http://forum.xda-developers.com/showthread.php?t=327849

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The tug SALVAGE GIANT enters Cape Town harbour at the recent week with the barge H40 in tow, with the latter carrying on board a quantity of river barges bound for Europe. Picture Aad Noorland

The tug SALVAGE GIANT enters Cape Town harbour at the recent week with the barge H40 in tow, with the latter carrying on board a quantity of river barges bound for Europe. Picture Aad Noorland

Feb
15th
Sun
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Feb
13th
Fri
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Feb
12th
Thu
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The Polish bulk carrier ROZTOCZE (24,109-gt, built 2008) in Cape Town harbour, December 2008. Picture Ian Shiffman

The Polish bulk carrier ROZTOCZE (24,109-gt, built 2008) in Cape Town harbour, December 2008. Picture Ian Shiffman