I would like to thank everyone for their advice on guying my R8 antenna.
I think I am going to use two sets of guys because, as several people
pointed out, the angle will be somewhat steep and downward pressure will
tend to make the antenna buckle. I will be using either nylon or dacron
because
The weekly Elecraft SSB net is Sunday at 1800z on 14.3035 MHz. Hope to hear
you.
Phil, NS7P
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Dave,
I recently purchased a used 40-15 meter version (MFJ-1788). I live
in a first floor condo and really have no place to permanently mount it,
so I use it on either a short 3 foot stand or extend it to 10 feet with
my car stabilizing the base. I've had this antenna for about 6 months
n
Hi Dave,
I've used an MFJ 1786 for some years now and my experience has been positive.
It's not a beam at 100ft, but over many hundreds of QSOs, the reports I've
received and sent compare favorably with a wire doublet up at 40 feet. There's
a learning curve associated with tuning it, but once
No experience with the MFJ but I do have an AlexLoop and it's pretty
versatile, sets up fast, is fairly immune to things around ... and
ground or the lack of it. It's definitely QRP, I'm not sure I'd want to
fool around with a mag loop at 100W. Narrow band [really] on 40 and 30
but tunes easi
On 09/06/2014 04:26 PM, Jim Brown wrote:
...
From Psychoacoustics (the science of how the human ear-brain
combination works), we know that we process sound in narrow chunks of
bandwidth called "critical bands." The ear tends to process sounds
within that band together, so when the filter gets
Does anyone have any experience using a MFJ-1786 with a K3? I live in a 2nd
floor condo in a 5 story brick building. Considering a magnetic loop on my
balcony to get back up on HF.
73 de Dave KJ6CBS
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On Sat,9/6/2014 2:28 PM, W2RU - Bud Hippisley wrote:
I believe that whether one observes monotonic improvement in ability to
decipher the intelligence carried in a very weak signal as one reduces receiver
BW will be a function of_how_ the BW is narrowed in the various electronic
circuits and/
On 9/6/2014 2:28 PM, W2RU - Bud Hippisley wrote:
On Sep 6, 2014, at 2:34 17PM, Dauer, Edward
wrote:
I received a couple of off-list comments that might be of interest
to those who are following this thread. One was that narrowing the
BW also improves the S/N.
Maybe. Maybe not. Or, maybe u
Unless your guy lines are rocket proof it probably won't make much difference.
:-)
Seriously though, near the top and in the middle work well for me in high wind
condition.
Howard
KG5AON
Sent from my iPhone
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Bud,
I think a lot has to do with the 'material between the ears'. Some have
developed the ability to hear signals that to my ears are buried in the
noise. Those chasing Low Band DX are examples of folks with that
ability. Some report using a wide bandwidth while others report good
results
On Sep 6, 2014, at 2:34 17PM, Dauer, Edward wrote:
> I received a couple of off-list comments that might be of interest to
> those who are following this thread. One was that narrowing the BW also
> improves the S/N.
Maybe. Maybe not. Or, maybe up to a point.
I believe that whether one obse
There is also a converse on preamp use that needs to be stated IMHO -
and mostly pertains to bands below 15 meters.
If there is a significant (3 to 6 dB) increase in noise heard in the
receiver when the antenna is connected (tuned where there are no signals
present) then the receiver gain is s
Thanks for the help in this solution. That was exactly the problem. I have
disconnected my Ameritron Model ARB-704 from the KPA500 and substituted it
with a homemade connector using the remote connector pins 2 & 4. Before this
TS-2000 was pushed into duty as the replacement for the ailing K3, it wa
Maybe most of you already know this, but...
It has been accepted that the K3 receiver needs a little help of a
preamp on 10m and 6m (especially 6m). That is why Elecraft came out
with the PR6 and later the PR6-10 preamps.
At lower frequencies the level of sky noise is much higher which
over
The "normal" or standardized modulation of PL tones is +/- 600 hetz... set and
left alone...The "normal" or standardized modulation used by repeaters at a
minimum is usually considered to be reliable is 20% or +/- 120 hertz.
Have a great day,
--... ...--
Dale - WC7S in Wy
> Hi all,
No argument with the theory here, though my personal experience is not
consistent with the earlier observation that a preamp won¹t do much if the
noise level drops perceptibly when the antenna is disconnected. On my K3
on 10M the noise level drops when no antenna is connected (by 10dB? Maybe
not)
Wayne, others ...
As a career (FCC licensed) two-way radio technician, I can confidently
state that the
"usual" ... there's no FCC Part 97 rule ... transmitter deviation for CTCSS
tones is
400 - 600 Hz. Not all repeater's receivers roll off the tones, and few
radios ... any? ...
made for the ham
On Sat,9/6/2014 9:36 AM, Wayne Burdick wrote:
There seems to be some debate about how much FM deviation is required for PL tones used
to activate repeaters. There's a wide range of deviation values in use by transmitters,
and various "standard" recommendations. The question is how much is neede
On 9/6/2014 9:36 AM, Wayne Burdick wrote:
Hi all,
There seems to be some debate about how much FM deviation is required
for PL tones used to activate repeaters. There's a wide range of
deviation values in use by transmitters, and various "standard"
recommendations. The question is how much is ne
Wayne when you find out the answer to your question I hope you will publish it
to the community. Seems like way low below the standard works because the
repeaters are low pass filtering out the speech going into the decoder.
73
Fred, AE6QL
-Original Message-
>From: Wayne Burdick
>Sent
Given that the FTDX5000 CW keying bandwidth has been discussed on this
list, I hope no one will be offended to learn that Yaesu has apparently
released new firmware which has by some method addressed this issue.
Successful or otherwise I have no idea, just the messenger.
Regards,
Mike VP8NO
_
Hi all,
There seems to be some debate about how much FM deviation is required for PL
tones used to activate repeaters. There's a wide range of deviation values in
use by transmitters, and various "standard" recommendations. The question is
how much is needed for reliable operation in the real w
You should be keying the KPA with the REMOTE connector on the TS-2000 where
REMOTE Pin 2 and Pin 4 are the contacts that short together to key the amp. I
normally also ground pin 2, and use Pin 4 as the amp-key output. There is also
a solid-state output (Pin 7 and ground), but this has the opp
Be careful with your guying. Even if the antenna is dead center, the
guy points will not be more than 2.1 m from the base. With guy points
that close any tension in the guys will be converted almost entirely
into downward pressure on the antenna (buckling forces).
You will need multiple guys -
Needs to be guyed in the middle (just below a joint) and the top (just
below the actual top). Use a hose clamp to hold a metal ring or two in
place - which will become your guying points. Use something like Kevlar
rope (1/8"from Radio Works), which is nonconducting and very strong.
I no longer
Vic,
My R8 is ground-mounted on 21 foot length of SS40 high yield strength
50,000 PSI steel pipe used for high security fencing. The pipe is buried
three feet deep in concrete. It is guyed at the 17 foot point of the
base pipe with 1/8" wire rope, and between the BC-BD joint of the R8
just be
Could you have the KPA500 key line pulled low when receiving? That would
activate its T/R switch (even during receive).
Try temporarily removing the PTT key line RCA connector from the back of the
KPA500 to see if the signal improves. If it does, try to figure out why it's
shorted during receive.
Mine is ground mounted on a 10' mast. I used 2 sets of guys, 1 at the top of
the mast, the other about 17' up the R8.
73, Mike NF4L
On Sep 6, 2014, at 6:18 AM, Vic, K2VCO wrote:
> I am putting up a Cushcraft R8 antenna on a flat roof that is about 3m x 3m
> square. The antenna is sitting on a
Greetings:
My K3 is on its way back to Elecraft for some needed repairs. So I have
placed my TS2000 into temporary duty. I have hooked it up to the KPA500 and
the KAT500 and it works very well in the transmitting mode. The problem
arises when I am in receive. If the KPA500 is in the STBY mod
I am putting up a Cushcraft R8 antenna on a flat roof that is about 3m x
3m square. The antenna is sitting on a 1m mast; the antenna itself is
about 9m tall.
It will have four guy ropes to the corners of the roof. What is a good
height at which to attach them to the antenna?
Are there rules
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