Hey guys.
To add to all this, I have 5 Kenwood repeaters in service, and I'll
say this, they just work.
I have 3 Kenwood version 1s, and 2 version 2s, and they take a beating
every day, just look at us, and say, give me more.
As far as running an external amp, never been an issue. We run about
20 watts out of the Kenwood, and feed it into a crescend amp, and it
works awesome. Even with our version 1s, we've had no issues. I've
owned Kenwood radios for years, and I will support them any day of the
week. For the money they make an awesome repeater.
Now if they only made one for 220, I'd be a very happy guy.
Cheers,
Jed.n1jbc
toggle quoted message
Show quoted text
On 1/25/21, Jeff DePolo WN3A <jd0@...> wrote:
That is how I use the term "desense": desensitization of the repeater RX
as a
result of the repeater TX being activated.
...
But it is always as a result of the repeater's own TX
Not trying to pick a fight, but wouldn't you consider a repeater receiver
being overloaded by some other transmitter's fundamental to be desense? I
would...
If confusion persists in these discussions, perhaps it would be
appropriate to
add more qualifying adjectives to our terms, e.g. self desense vs. site
desense.
Bob NO6B
Then there's the case where a repeater operating with a duplexer has a bit
of desense "on the bench" when connected to a dummy load due to
insufficient
isolation but exhibits no perceptible desense when operating into an
antenna
at a site with a high ambient noise level. Is there still "desense" when
you can't hear it? It's like the old question "if a tree falls in the
woods
and nobody is there to hear it"...
To me, a receiver is "desensed" when some discernable action causes the
degradation, typically involving the keying up of one or more transmitters.
And it applies whether it involves your own repeater transmitter or some
other(s), and whether the apparent decrease in sensitivity is caused by
fundamental overload or an increase in on-channel noise. While I'd rather
talk about the specific cause of the desense (e.g. fundamental overload,
phase noise, transmitter mixing, ACI, PIM, etc.) rather than lumping them
all together into one catch-all term, for the sake of simplicity, or when
you haven't yet determined the root cause, the term "desense" covers
multiple potential causes.
An ambient site noise level that is elevated to the extent that an
effective
sensitivity measurement demonstrates a constant impairment isn't "desense"
to me. A high noise floor is independent of the repeater transmitter, or
other transmitters close in proximity or frequency, keying on and off.
At least that's how my twisted mind thinks...
Bernie Sanders' Mittens
--- Jeff WN3A
--
This email has been checked for viruses by Avast antivirus software.
