The guy was pedantic. The delta due to changes in mismatch error were in the
noise, no pun intended.
As far as I was concerned, it was a waste of a receiver I would have killed for
in those days. Your tax dollars at work.
Wes N7WS
On 5/25/2022 2:31 PM, Edward Mccann wrote:
Thanks for
That’s nice to know. A long time ago I measured the input impedance of a Yaesu
transceiver with a network analyzer. I looked for but couldn’t find my measured
data but I remember it varied from band to band between 25 and 100 ohms, so
within 2:1 VSWR.
Al W6LX
> On May 25, 2022, at 1:06 PM,
Thanks for the aviation history Wes.
I was mostly thinking about your comment:
“ I never had the heart to tell him that the minute the AGC activated, all bets
were off.”
73
Ed McCann
AG6CX
Sent from my iPhone
> On May 25, 2022, at 2:19 PM, Wes wrote:
>
>
https://theaviationgeekclub.com/how-the-f-14-tomcat-sharpened-his-teeth-the-story-of-the-six-on-six-missile-shot-test/
On 5/25/2022 12:50 PM, Edward Mccann wrote:
Hope the Phoenix Missile hit its target!
Ed McCann
AG6CX
__
Many many radios are loaded with "whistles and bells". But the better
radio is.the one you enjoy using. If it does everything you
wish, then look no further.
73
Bob, K4TAX
On 5/25/2022 1:18 PM, elecraft-requ...@mailman.qth.net wrote:
From: Al Lorona
To: Elecraft Reflector
Hope the Phoenix Missile hit its target!
Ed McCann
AG6CX
Sent from my iPhone
> On May 25, 2022, at 12:46 PM, Wes wrote:
>
> About 40 years ago I was a Responsible Engineer for the Phoenix Missile
> Receiver/Transmitter Unit (RTU). This was a monopulse radar and my unit fed
> ~30 MHz i-f
About 40 years ago I was a Responsible Engineer for the Phoenix Missile
Receiver/Transmitter Unit (RTU). This was a monopulse radar and my unit fed ~30
MHz i-f signals to the following Electronics Unit (EU) which did the signal
processing. The EU test position had a Collins 51S-1 receiver in
Most of you are HF operators; translation: you receive strong signals.
But if you design VHF/UHF/mw preamps, achieving low Noise figure (NF) is
desired. Advanced receiver designers are aware lowest NF does not occur
at low-Z (eg. 50-ohms). Input Z is lowest in NF at Z near 200-ohms
(varies
On 5/25/2022 9:05 AM, Walter Underwood wrote:
What is a typical input impedance for modern receivers, or specifically
Elecraft receivers?
Many years ago, while working as a consultant designing large sound
systems, antenna systems for wireless mics operating on un-used VHF TV
channels were
Thanks. I’ll make a wild generalization that transceivers are generally
designed for the receiver portion to be 50 Ω.
Anybody have an idea about SWL receivers?
wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)
> On May 25, 2022, at 10:05 AM, Wayne Burdick wrote:
>
Are you certain that overdriving the front end of the KX3 that hard
isn't affecting the input impedance? It's an active front end.
73,
Dave AB7E
On 5/25/2022 10:54 AM, Ingo Meyer DK3RED wrote:
Hello Wunder,
What is a typical input impedance for modern receivers, or
specifically
Hello Wunder,
What is a typical input impedance for modern receivers, or specifically
Elecraft receivers?
I’m asking because antenna tuners are a frequent question on an SWL group I
follow and I’m pretty sure that they are not needed for most situations. If the
receiver input impedance is
Sorry, disregard
-73- FrankKG9H
kg9hfr...@gmail.com
> On May 25, 2022, at 12:31 PM, Doug Hensley wrote:
>
> For Sale is my KRX3A Sub-receiver with the General Coverage option.
>
> If you look on pages 9-12 in the KRX3A manual, you will see what would have
> come with a KRX3A;
>
For Sale is my KRX3A Sub-receiver with the General Coverage option.
If you look on pages 9-12 in the KRX3A manual, you will see what would have
come with a KRX3A;
https://ftp.elecraft.com/K3S/Manuals%20Downloads/E740126A%20KRX3A%20Subreceiver%20Installation%20and%20Operation.pdf
Note the new
All antenna-facing stages in our receivers are designed for a nominal 50 ohm
input. All of the preamp stages incorporate feedback to ensure a predictable,
constant input impedance.
73,
Wayne
N6KR
> On May 25, 2022, at 9:44 AM, John Oppenheimer wrote:
>
> Hi Walter,
>
> Elecraft receivers,
Hi Walter,
Elecraft receivers, I'm familar with (K2,K3,KX[23], use "Feedback
Amplifiers" for their Pre Amp. The Feedback Amplifiers are designed for
nominal 50 ohm input impedance. Fifty ohm input impedance is somewhat
import for operation of the receiver bandpass filter.
I'll assume detector
What is a typical input impedance for modern receivers, or specifically
Elecraft receivers?
I’m asking because antenna tuners are a frequent question on an SWL group I
follow and I’m pretty sure that they are not needed for most situations. If the
receiver input impedance is not 50 Ω, that is
Several weeks ago, someone here recommended listening to a recent interview
with receiver test guru Rob Sherwood. In it, the interviewer pressed Rob for a
radio recommendation. At first he resisted but eventually gave three
transceivers that he said "anybody would be very happy with". But when
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