Re: 75 And 50 Ohm Connectors In Same Listening Chain ?
- From: Dave Oldridge <doldridg@xxxxxxxxxxxxxxxxxxx>
- Date: Sun, 26 Feb 2006 17:29:28 GMT
"Robert11" <rgsros@xxxxxxxxx> wrote in
news:_rOdndQpXOwhI53ZnZ2dnUVZ_sGdnZ2d@xxxxxxxxxxx:
Hello,
Should have asked this also in my previous post re 50 or 75 ohm coax,
but I guess it is probably better to start a different thread.
New at this, so please pardon these very basic type of questions.
For a receiving only application, 30 MHz on down:
Putting up a new Inverted-L receiving antenna.
Radio, Balun, Lightning Arrestor use the 259 type of plug which I
guess is nominally for 50 ohm systems.
I can go with 75 ohm BNC connectors for the main coax run, but am
pretty well stuck with the
259 type for the already purchased units I noted above.
Intuitively, I guess I would like (all) 75 ohm connectors if I am
using 75 ohm coax.
But, for 30 MHz and lower listening, would I even notice any
difference, probably ?
Is any received signal lost, or reflected back, at these 75-50 ohm
junctions ?
If meaningful, any way around the problem ?
Most HF receivers have plenty of sensitivity and most HF bands that would
be of interest (with the possible exception of 10-11m) are noisy enough
that a lossy antenna is not a huge problem unless the losses are really
large. 10db is quite tolerable in most equipment.
Of course, for transmitting you want as little loss as possible.
--
Dave Oldridge+
ICQ 1800667
.
- References:
- 75 And 50 Ohm Connectors In Same Listening Chain ?
- From: Robert11
- 75 And 50 Ohm Connectors In Same Listening Chain ?
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