Yes and without proper lightning protection or static build-up
prevention on a feedline, a nearby strike can induce 4KV+ on the antenna
and feedline. A flash-over will likely leave a carbon trace that will
be followed by a few 100 watts of RF. It only gets worst, not
better. On more than one occasion I've heard a snap snap only to
observe a spark occurring between the shell and center pin of a
PL-259. This was before I installed PolyPhaser devices on the lines
and before I stopped disconnecting my feed lines from the equipment.
Since then, no issues.
73
Bob, K4TAX
On 9/27/2019 1:04 PM, Jeff Blaine wrote:
PL259/SO239 BDV is around 4KV in dry air.
73/jeff/ac0c
alpha-charlie-zero-charlie
www.ac0c.com
On 9/27/19 1:01 PM, j...@kk9a.com wrote:
5000 watts is 500 volts rms with a perfect antenna system. I suspect
that PL-259 connectors really can withstand much more than 500 volts.
Has anyone tested them? My station has a mixture of UHF, N and DIN
connectors and all have worked perfectly for 1500 watts HF. If
PL-259s are failing they are either poor quality connectors or there
are serious antenna issues causing excessive voltage.
John KK9A
Walter Underwood K6WRU
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
From the Amphenol data sheet, UHF connectors are rated for 500 V
peak, so they are marginal for use at that power level. Type N
connectors are rated at 1500 V peak.
wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)
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