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Line Type: Andrew Heliax LDF4-50A
Line Length: 625 Feet
Frequency:   27MHz
Load SWR: 1.2:1(estimate)
Power In: 100 W(estimate)

Results
Matched Loss: 2.121 dB
SWR Loss:    0 dB
Total Loss: 2.121 dB
Power Out: 61.363 W

Source:
Coax Calculator

Not accounting for splices, that is what Heliax will do at that length. With 'splices' over that length; even Heliax won't be much help. Depends on the kind of splice it is. Using barrel connectors, the loss will be well-tolerated. With open splices? Forgeddabout!

A lesser quality cable - let's say Times/Microwave LMR-400 will be:

Results
Matched Loss: 3.954 dB
SWR Loss: 0dB
Total Loss: 3.954 dB
Power Out: 40.238 W

<blockquote data-quote="Robb" data-source="post: 357222" data-attributes="member: 8446">Line Type:&nbsp; &nbsp; Andrew Heliax LDF4-50ALine Length: 625 Feet&nbsp;&nbsp; Frequency:&nbsp;&nbsp; 27MHzLoad SWR:&nbsp; &nbsp; &nbsp; 1.2:1(estimate)Power In:&nbsp; &nbsp; 100 W(estimate)ResultsMatched Loss:&nbsp; &nbsp; 2.121 dBSWR Loss:&nbsp; &nbsp;&nbsp; 0 dBTotal Loss:&nbsp; &nbsp; &nbsp; 2.121 dBPower Out:&nbsp; 61.363 WSource:<a href="http://www.saarsham.net/coax.html" target="_blank">Coax Calculator</a>Not accounting for splices, that is what Heliax will do at that length.&nbsp; With &#039;splices&#039; over that length; even Heliax won&#039;t be much help.&nbsp; Depends on the kind of splice it is.&nbsp; Using barrel connectors, the loss will be well-tolerated.&nbsp; With open splices?&nbsp; Forgeddabout!A lesser quality cable - let&#039;s say Times/Microwave LMR-400 will be:ResultsMatched Loss:&nbsp; &nbsp; 3.954 dBSWR Loss:&nbsp; &nbsp; &nbsp; 0dBTotal Loss:&nbsp; &nbsp; &nbsp; 3.954 dBPower Out:&nbsp; 40.238 W</blockquote>

[QUOTE="Robb, post: 357222, member: 8446"] Line Type: Andrew Heliax LDF4-50A Line Length: 625 Feet Frequency: 27MHz Load SWR: 1.2:1(estimate) Power In: 100 W(estimate) Results Matched Loss: 2.121 dB SWR Loss: 0 dB Total Loss: 2.121 dB Power Out: 61.363 W Source: [url=http://www.saarsham.net/coax.html]Coax Calculator[/url] Not accounting for splices, that is what Heliax will do at that length. With 'splices' over that length; even Heliax won't be much help. Depends on the kind of splice it is. Using barrel connectors, the loss will be well-tolerated. With open splices? Forgeddabout! A lesser quality cable - let's say Times/Microwave LMR-400 will be: Results Matched Loss: 3.954 dB SWR Loss: 0dB Total Loss: 3.954 dB Power Out: 40.238 W [/QUOTE]

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