:54:43 -
From: Ken Kopp k...@rfwave.net
Subject: [Elecraft] OT: SO-239 Connector Selection
To: elecraft@mailman.qth.net
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My experience with SO-239' / PL-259
: Ken Kopp k...@rfwave.net
Subject: [Elecraft] OT: SO-239 Connector Selection
To: elecraft@mailman.qth.net
Message-ID: acdef2099be54aadb7632b69e498b...@shack
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My experience with SO-239' / PL-259's
A word of caution about SO-239 / PL-259's ...
In some connector applications ... particularly power
dividers and other applications that are impedance-
conscious ... SO-239 / PL-259 connectors are not
suitable.
They're -not- 50-ohm connectors. This is why one usually
sees Type-N connectors
In some connector applications ... particularly power
dividers and other applications that are impedance-
conscious ... SO-239 / PL-259 connectors are not
suitable.
This is NEVER the case at 30 MHz and lower, so long as connection to the
connector are properly done. The total impedance bump
SO-239 / PL-259 connectors are not suitable.
WRONG! This is another myth, repeated and repeated until it becomes
accepted. This is HF, not UHF. The impedance of the connector only
matters when the frequency is high enough that the length of the
transmission line that the connector comprises
I agree with Tom. The biggest problem, from my perspective, with the UHF
connectors is the variability of attachment to the cable. I have no experience
with crimp varieties, they may mitigate the issue, but the solder on types are
ripe for trouble.
The other problem with them if you are
On Thu, 2010-07-22 at 10:27 -0700, Wes Stewart wrote:
The other problem with them if you are trying to do any precision
measurements---an oxymoron I suppose---is that any decent instrumentation
will have type N connectors, thus adapters are necessary.
It's a little-known fact that a male N
My experience with SO-239' / PL-259's -was- at
VHF and UHF, and I said so in my posting.
I was made aware of this when the Colorado Springs
radio club ordered a 4-port divider to feed their 2M
repeater's antennas and they specified / insisted on
me building it with SO-239's. I shipped it and
On 7/22/2010 10:49 AM, Alan Bloom wrote:
It's a little-known fact that a male N connector is a perfect fit
with a female BNC. Of course, there is no locking mechanism so
you wouldn't want to use it for an antenna connection, but it
works fine for testing on the bench - no adapter necessary.
Another little known fact is BNCs come in both 50 ohm 75 ohm versions.
I used both 75 ohm (video) 50 ohm (RF) at work.
So verify if it matters to the usage!
--
It's a little-known fact that a male N connector is a perfect fit with a
female BNC.
On 7/22/2010 11:34 AM, George Jan wrote:
Another little known fact is BNCs come in both 50 ohm 75 ohm
versions. I used both 75 ohm (video) 50 ohm (RF) at work.
Ditto for N series. We used to paint a red ring around the 75
ohm types in our off-the-air monitoring facilities for ease of
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