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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!swrinde!gatech!gatech!kd4nc!ke4zv!gary
- From: gary@ke4zv.uucp (Gary Coffman)
- Newsgroups: rec.radio.cb
- Subject: Re: SWR Tuning and PLL
- Message-ID: <1992Dec20.144424.1428@ke4zv.uucp>
- Date: 20 Dec 92 14:44:24 GMT
- References: <BzF5t6.I3B@acsu.buffalo.edu> <1992Dec18.213844.7701@hpcvaac.cv.hp.com>
- Reply-To: gary@ke4zv.UUCP (Gary Coffman)
- Organization: Gannett Technologies Group
- Lines: 23
-
- In article <1992Dec18.213844.7701@hpcvaac.cv.hp.com> billn@hpcvaac.cv.hp.com (bill nelson) writes:
- >v054rtzw@ubvmsb.cc.buffalo.edu (RUFUS) writes:
- >:
- >: Jason,
- >: An SWR meter measures the Standing Wave Ratio hence SWR. What SWR is is the
- >: amount of reflexed power recieved by your rig from a mistuned antenna. A
- >
- >Close. It is the ratio between the power reaching the antenna and the power
- >reflected by the antenna.
-
- The SWR, properly the VSWR, is the ratio of the forward voltage on the
- line to the reverse voltage on the line at any point along the line.
- The "standing wave" is the vector sum of these two voltages. All the
- power injected into the transmission line by the transmitter is dissipated
- in either the antenna or the line losses, none is absorbed by the radio. A
- mismatch can affect the *efficiency* of the radio output stage, thus causing
- heat buildup, but this isn't power "reflected" into the radio from the
- line.
-
- [deleted]
- All the rest was right on the money.
-
- Gary KE4ZV
-