Glad the solution was simple. And THANKS for posting your results. I wish
others would do the same when their issues are resolved.
73
Bob, K4TAX
Sent from my iPhone
> On Jun 15, 2022, at 10:25 AM, N4ST - Jim wrote:
>
> For some reason, my previous post did not show up.
>
> *** PROBLEM
Bob
Sent from my iPhone
> On Feb 16, 2022, at 10:33 AM, elecraft-requ...@mailman.qth.net wrote:
>
> Send Elecraft mailing list submissions to
>elecraft@mailman.qth.net
>
> To subscribe or unsubscribe via the World Wide Web, visit
>http://mailman.qth.net/mailman/listinfo/elecraft
>
I’ve always found and was taught that one should not just dump the power on
station shut-down. This could be the cause of many mysterious and lucid
operation
Likewise; on power up:
(A). Power supply on first
(B). Transceiver on next
(C). P3 on if not powered from the K3
(D). KAT500 on if not
The comments are good . But considering all the pluses and minuses, wouldn’t
it make more sense to use a OCFD and not worry about ground rods, counterpoise
needs, high SWR, high voltage and currents in the tuner? A well designed OCFD
with correct Balun plus a common mode choke at the feed
While I don't often run RTTY, I do run a good bit of PSK-31, WSJT-X FT-8
and MSK-144 along with CW and SSB modes. I do watch the PA temp,
specially as it nears 65 to 70 degrees C. I also run with the Fan on
#1 or #2 for starters. I know some will say it doesn't make a
difference while
Tony;
Seems you have done an excellent job and things are working as you
expected. And a special thanks to you for reporting back to the group
your findings and results. I wish everyone did that. We'd all be
informed.
73
Bob, K4TAX
On 6/11/2020 8:00 PM, Tony wrote:
All:
The K3S
Not being a high speed CW op nor a contest CW op, I find that QSK is,
well, just very nice. I don't need to hear between the CW elements,
nor even the letters, but more so in between the words. Some ops have
a clean fist but run all the words together. No spaces. Drives me
nuts.
I use a Shure SM-58 mike with my K3S. It is a balanced dynamic mike.
It has an XLR at the mike and the 8 pin Foster connector at the radio.
I use good quality, 2 conductor, shielded mike cable.
It is wired as follows:
XLR pin #1 to Foster pin #8 {shield}
XLR pin #2 to Foster pin #1
And perfect will never occur. So one best think of adequate.
73
Bob, K4TAX
On 6/10/2020 1:42 PM, W2xj wrote:
adequate is not perfect. YMMV
Sent from my iPad
On Jun 10, 2020, at 2:07 PM, Bob McGraw K4TAX wrote:
In referencing TF.NIST.GOV on page 251, I find it stated;
"When
In referencing TF.NIST.GOV on page 251, I find it stated;
"When high accuracy is not required, probably and fastest way of
comparing the frequency of an oscillator to a broadcast standard is the
familiar heterodyne or zero beat method. "
And then on page 253, I find it stated;
" Usually,
Since the input is clearly marked MONO, a tip-sleeve is the correct plug. If
one uses a TRS plug, the ring should be connected to the sleeve inside the
plug.
Using a mike which has an XLR, pin 2 should connect to the Tip, pin 3 to the
sleeve, and the shield only connects to XLR pin 1 at the
I’m curious. When transmitting, why would one press the POWER button on the
radio other than to turn the radio off?
Something I am missing here.
Bob, K4TAX
Sent from my iPhone
> On Jun 8, 2020, at 9:34 PM, Yoshida Akira wrote:
>
> Hi all
>
> Thanks for suggestions. All look OK to
Thanks Wayne for the excellent and exceptional clean keying.
73
Bob, K4TAX
Sent from my iPhone
> On Jun 7, 2020, at 8:49 PM, Wayne Burdick wrote:
>
>
>>
>> N4ZR wrote:
>>
>> Will the K4 have options for setting CW rise and fall times...?
>
> Hi Pete,
>
> Probably not. We've always
Since Microsoft does not know of every piece of software, on every
Windows computer in the world, for simplicity, very often a Windows
update will set values to DEFAULT values. Therefore, it is necessary
for the user to set certain parameters to their preferred values after
an update. I
There are actually 2 time elements involved. First is the time between
key closure and the amp key command. This is approximately 3ms of
processing time inside the radio. The second is amp key command to RF
generation out of the radio. This is the 5ms between amp key command
and RF
With my P3 I observe many CW signals that are wide. And key clicks are
easily recognized. Likewise, transmit phase noise is also recognized as
some signals are wide and some are very narrow. Casual observations
seem to center on one particular brand of radio that is most prone to
have
From my take, it is "ham radio" therefore +/-1 Hz. should be good
enough for most operations. After all, the K3S resolution is 1 Hz.,
+/-1 count as I see it. I can keep mine +/-2 or 3 Hz on most bands.
I use WWV with the radio in CW mode and CWT on, tune close to WWV and
press SPOT. If
While I use an external transverter with my K3S, I do not suggest using
the K3 internal preamp. The transverter has adequate gain and also a
good low noise front end.
73
Bob, K4TAX
On 6/5/2020 2:03 PM, Jim Miller wrote:
Helping a friend to try to get the most out of his 2m equipped K3
I agree with Jim, K9YC on this. Grounding is for lightning
protection. To be effective, it should be outside of the
structure/house and be very low resistance. And all driven grounds
must be bonded back to the AC Mains ground. This is per NEC. Your
equipment, your house, and your life
Just look at $11.00 per ground rod connection for Cad-Weld as compared
to $1.98 for a mechanical clamp. Which do you think a ham will choose ?
73
Bob, K4TAX
On 6/5/2020 12:46 PM, Walter Underwood wrote:
Cad-weld seems a easier than the other approach described. It is more robust
against
Anyone that would desire to have a proper and reliable installation for
connecting a conductor to a ground rod. Me for one!
To that end, I've visited many ham stations where it seems there is a
mish mash of equipment connected in a hap hazard manner. I view this
is far from good
You say you checked the "fuse" and it is OK. In fact, there are two
fuses. If either has failed the amp won't power on. Then check the
voltage at the outlet from where the amp is powered.
If you don't know where to start looking,.if the above two items
are OK, then I suggest
Weren't you taught not to whittle toward yourself and not to spit into
the wind? Neither works.
73
Bob, K4TAX
On 6/4/2020 9:59 AM, Dave Cole wrote:
I have that same problem, maybe 1 in 10 or 2,0 I slice the cable or my
hand... ;)
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL
2020 at 8:26 AM Bob McGraw K4TAX <mailto:rmcg...@blomand.net>> wrote:
As a rule, if one needs a tuner to get a good match on 6M, I'd say
they need to look carefully at their antenna system. My 6M yagi
shows less than 1.5:1 over the lower 2 MHz of the band, 50.0 -
52.0 MHz
It is correct that there is no such thing as a breakdown voltage, as
stated earlier. This becomes obvious since the units are given as V/m,
which is represents Volts per meter, or Electric Field strength.
Also, unless one is measuring the field in between two plane parallel
metallic plates,
PM Bob McGraw K4TAX <mailto:rmcg...@blomand.net>> wrote:
Plus there is L1 which is 0.3uH in the circuit and C7 and C8 in the
circuit when in the bypass position. This does not allow the tuner,
even in bypass mode, to work well as an antenna switch on 6M.
The c
Plus there is L1 which is 0.3uH in the circuit and C7 and C8 in the
circuit when in the bypass position. This does not allow the tuner,
even in bypass mode, to work well as an antenna switch on 6M.
The capacitors in question are not rated for the RF current
experienced under certain load Z
I agree with Jim, K9YC on these points.
** OCFD antennas are noted to have lots of common mode current issues.
These are a chore to tame.
** Most commercial baluns or common mode chokes are poor designs, of
inadequate material, designs copied from other poor designs but packed
in a
Based on my experience, balun power ratings are for MATCHED conditions.
It is rare that hams use a balun in a matched condition. Thus a 1:1
balun should see 50 ohms on the input and 50 ohms on the output, while a
4:1 balun should see 200 ohms on the output and 50 ohms on the input.
In
Likewise there seems to be a lot of pessimism when a product is in back order
status. If I really wanted a product, such as my K3S, there was a backlog of
orders. I placed the order and waited 3 months. No regrets in any aspect.
Bob, K4TAX
Sent from my iPhone
> On May 28, 2020, at 8:18
And one must remember that most folks will spend the least amount of
money necessary to get the HVAC system working or perhaps install a new
system. And most of these folks have no clue about RFI, but are only
concerned if their abode is hot or cold, warm or comfortable.
As a purchasing
My take on this is "prepare to do some noise mitigation yourself."
Jim, K9YC, has several good papers dealing with noise reduction and
methods to accomplish same. In general, adding correct type ferrite
chokes to the AC mains and the control lines is, in general, good
starting point.
Rule #1 - If it isn't broke, don' try to fix it.
Rule#2 - See rule #1.
I agree with Don, a reset will wipe everything including calibrations
and alignment parameters. While the previous owner's information,
frequencies, and etc. may not be of use to you, one can easily overwrite
those
I have installed a whole house surge protector on the main breaker
panel. Thus everything in the house is protected equally.
I don't use any surge protection devices at any other locations.
My Justification: more connections, more items = more problems.
73
Bob, K4TAX
On 5/18/2020
Almost nothing lasts or works forever. Usually electrolytic caps dry out,
their MFD value decreases. Very easy and inexpensive repair.
Bob, K4TAX
Sent from my iPhone
> On May 17, 2020, at 7:58 PM, Michael Walker wrote:
>
> I had 2 of them and they both went noisy after 15 years.
>
> I
In all instances, 160M, 80M, & 40M, I run 15 dB Attenuation. For 10M & 6M I run
Pre 1. RF gain is then adjusted per band as needed depending on band noise.
Bob, K4TAX
Sent from my iPhone
> On May 17, 2020, at 5:30 PM, donov...@starpower.net wrote:
>
> Hi John,
>
>
> The K3/K3S "RF
I have 2 of the Astron SS-30M supplies on my desk for my 2 stations. I
have observed no evidence of RFI issues. I find them to be very
reliable power supplies.
73
Bob, K4TAX
On 5/17/2020 4:23 PM, Tony wrote:
All:
Has anyone tested the latest Astron switching power supplies for
noise?
Marv just confirmed justification for doing and keeping back-up
configurations. I do back-ups for each of piece of Elecraft equipment
on a regular basis. Same for the computer.
73
Bob, K4TAX
On 5/16/2020 8:53 PM, marvwhee...@nwlink.com wrote:
Thanks to all that responded. I uploaded a
You will need the KAT500 Utility to perform a reset to factory values.
That software is a free download on the Elecraft site.
While you are at it, download all the various software's for each piece
of equipment. i.e. K3, P3, KPA500, KAT500. They allow you to save
parameters, change
I wouldn’t run the KPA500 at half power. And 25 watts of drive is certainly
more than mine requires to attain rated power, except on 6M where it requires
25 watts.
As to power output indicators, I used my Bird43 and a 500 watt element with a
known good 50 ohm load. I then calibrated the
That is a very good argument for having ALC active between the amp and
radio. It would have likely saved the amp.
73
Bob, K4TAX
On 5/15/2020 6:12 PM, Andy Durbin wrote:
Well if it were mine I'd open it up and inspect everything between J3 pin 25
and T1. I would expect to find a well
What is the SWR? If above the KAT500 set value it inhibits the amp from being
keyed. Check the KAT500 using the ATU utility.
Bob, K4TAX
Sent from my iPhone
> On May 15, 2020, at 1:50 PM, Jack Brindle via Elecraft
> wrote:
>
>
> Check the cable connections, including making sure that
Sent from my iPhone
> On May 14, 2020, at 1:12 PM, Jim Brown wrote:
>
> On 5/14/2020 7:56 AM, Bob McGraw K4TAX wrote:
>> However it has become a "contest" to see who and what organization can
>> accumulate the most points. A contact is a contact, a multiplier is a
I agree, specially on the first sentence. I've been participating in
FD since the very early '60's. However it has become a "contest" to see
who and what organization can accumulate the most points. A contact is
a contact, a multiplier is a mathematical term. It has no place in
Field
With the current COVID-19 conditions, I'll be staying at home. No Field
Day participation for me. Many in our club feel the same way. Too risky.
The objective of Field Day originally was to show and demonstrate
capability of station operating under simulated conditions. Thus no
phones, no
I just ran quick tests on my K3S on all bands, first with the KAT3a
bypassed and then with the KAT3a allowed to resolve a match. Both cases
were using a 50 dummy load and external power meter to measure the power
into the load. The current values were from the K3S display.
In all cases I
even cost more than $10.
On Mon, May 11, 2020 at 10:31 PM Nr4c <mailto:n...@widomaker.com>> wrote:
Agreed, they are not balanced.
Sent from my iPhone
...nr4c. bill
> On May 11, 2020, at 10:14 PM, Bob McGraw K4TAX
mailto:rmcg...@blomand.net>> wrote:
I don't find that either the front or rear MIC inputs are balanced
inputs.
73
Bob, K4TAX
On 5/11/2020 9:02 PM, Nr4c wrote:
1/4 to 1/8 TRS and plug in rear mic jack.
Sent from my iPhone
...nr4c. bill
On May 11, 2020, at 5:34 PM, Tony wrote:
All:
I'd like to connect an XLR mic cable
I just wired an XLR to the 8 pin MIC connector via a 2 conductor
shielded cable and be done with it. I hate adapters due to the high
likelyhood of intermittent connections.
XLR pin #1 to 8 pin #7 Shield
XLR pin #2 to 8 pin #1 mic hi
XLR pin #3 to 8 pin #8 mic lo
Be sure BIAS is turned
As long as one stays within the duty cycle times limits, no problem.
Do note that some antenna system which are lower impedance will require
the amp to draw more current for a given amount of power. And it does
vary from band to band. The attached EXCEL spreadsheet should be of
interest
That would be "Intermittent Commercial and Amateur Service".
73
Bob, K4TAX
On 5/4/2020 1:24 PM, Jim Brown wrote:
On 5/4/2020 6:53 AM, John Simmons wrote:
Nowadays manufacturers use 'ICAS'. One even specs their amp for '100%
duty cycle ICAS'. ICAS=Intermittent Continuous Amateur Service'.
As a 17 year old, I rode the train {pulled by a coal fired locomotive}
from Fulton, KY to Memphis, TN. I had to walk about 8 blocks to the
Post Office building where the FCC administered the tests. I took the 4
elements and passed all 4 of them earning me a First Class Radio
Telephone
meter is
being viewed in the menu*.".
Hopes this information helps.
73
Bob, K4TAX
On 4/25/2020 10:21 PM, Bob McGraw K4TAX wrote:
{I changed the topic for good reason.} Was " K3S poor CW keying
further investigation"
Lee brings up a good point with regard to power supply ter
The internal preamp in my K3S does an excellent job on 6 meters. If I
decided to use an external preamp, it would be located at the antenna
feed point with suitable switching and protection.
I suppose the question, what bands do you perceive you need a preamp?
And what is your no signal
I do use ALC between my KPA500 and my K3S. I do find that the ALC
setup and calibration is critical for correct operation. As to the
effects of it being set incorrectly, I can't say. I do know it must be
done for every band and the amp ALC will be displayed on my K3S. The
amp ALC THR
strikes me as not bad at all.
73, Pete N4ZR
Check out the Reverse Beacon Network
at <http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.
On 4/26/2020 12:11 PM, Bob McGraw K4TAX wrote:
The power cable at 0.03 o
Oh well, I need another cup of coffee. I'll try to do better proof
reading. Can't blame that one on auto-correct!
Cutting to the chase., measure from the power supply POS
terminal to the ACC 12V on the K3 radio. That is the total voltage
drop in the POS DC path. Then do the
The power cable at 0.03 ohms on each side, a total of 0.06 ohms
resistance. The 4005i, per his measurements, has 0.08 ohms
resistance. The power distribution strip contributes more than 50% of
the voltage drop. Actually more than the power cables.
The power cable contributes 1.2 volts
{I changed the topic for good reason.} Was " K3S poor CW keying
further investigation"
Lee brings up a good point with regard to power supply terminals.
If you have one of those power supplies that have the terminals with a
set screw in the side, you are limited to the number or wires or
Change the connectors on the power supply to accommodate several ring
type connectors. Use 1" long #10 bolts, nuts, flat washers and
insulating washers which are easy to find at your local hardware store
and are very easy to use and replace. Then you can connect 8 to 10
pieces of
supply in a station that has more than one high current rig,
(even if they are not used at the same time) since the connectors on
most of these supplies will take at most only one 10-12 gauge cable?
Ron WA2EIO
On 4/25/2020 10:56 AM, Bob McGraw K4TAX wrote:
Jim et al:
Thank you for confirming
ewiring, and I want to do it right!
Gunny, KE0PVQ
Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for
Windows 10
From: Gmail<mailto:anyone1...@gmail.com <mailto:anyone1...@gmail.com>>
Sent: Saturday, April 25, 2020 9:03 AM
To: Bob Mc
Gunny et al:
The issue with power distribution strips for DC is resistance. Every
contact or connection in the path adds some value of resistance. Using
Ohms law, where E = IR, we see that more resistance = more voltage
drop. This includes the resistance of the DC power cable and any
As to the RigRunner power pole strip.PUT IT IN THE TRASH where
it belongs. NEVER NEVER NEVER use a power distribution strip to power
a 100 watt radio. ALWAYS connect the radio direct to the power supply
terminals. NO exceptions!
73
Bob, K4TAX
On 4/25/2020 7:13 AM, Chuck
I've always put a bit of heat sink compound on the rectifier unit before
mounting it to the bottom plate. I've found several power supplies
where the bridge rectifier assembly failed and upon removal, there was
no heat sink compound. Add a new bridge assembly and some heat sink
compound
I just label mine coax feeds with my P-Touch. Just read what is on the
label.
160M loop, 160M dipole, 75M dipole, VHF/UHF vertical, 6M yagi..
73
Bob, K4TAX
On 4/23/2020 2:22 PM, Charlie T wrote:
Also, you can buy multi-colored electrical tape at the typical home stores.
I use
That's not what makes my CW poor. And I've found nothing to make it
any better. I just need software that sends what I'm thinking. But
then, at age 77, that would be about 5 WPM or so.
I use either single lever or dual lever paddles with my K3S. I've not
observed anything related to K3S
I updated my Windows 10 machines this morning.
They show:
Google Chrome is up to date
Version 81.0.4044.113 (Official Build) (64-bit)
73
Bob, K4TAX
On 4/21/2020 9:01 AM, Kevin Cozens wrote:
On 2020-04-21 8:19 a.m., Lyn Norstad wrote:
If you haven't already installed the latest update,
Just adjust the voltage to 14.5 to 14.8 no load, usually via an internal
adjustment, and be done with it.
73
Bob, K4TAX
On 4/20/2020 2:59 PM, Richard Donner wrote:
Hi Ken
Thanks for the info.
I am not in a rush yet. I noticed that the voltage is 13.4.. Maybe a
little higher might be
I'm using the Astron SS-30M for my station. Actually I have 2 of them
on the desk, one for the K3S and accessories and the other one for
another brand of radio and accessories. I have found they are reliable,
quiet and no RFI issue between 160M and 1296 MHz, including 144 MHz, 432
MHz.
73
Per the manual, the KAT3A internal tuner for the K3S will match a SWR
range of 10:1 with a 100 watt power rating. {page 79} And it will
match a 20:1 SWR range with a 10 watt power rating. I've never
encountered any of my crazy antennas that it wouldn't match.
73
Bob, K4TAX
On 4/20/2020
I had a ham mention to me that this power supply blew up. He was somewhat
annoyed when I ask if anyone was injured in the explosion.
Folks, for us trying to assist with technical issues, please give complete and
accurate descriptions. You will get better answers.
Bob, K4TAX
Sent from my
Yep, got that experience last year at the Huntsville Hamfest. The K4 was being
controlled wirelessly from an iPad. Darn slick too.
Bob, K4TAX
Sent from my iPhone
> On Apr 19, 2020, at 4:43 PM, David Gilbert wrote:
>
>
> That was already demonstrated by Elecraft in what I believe was
I agree. Match the antenna, whatever the Z may be, to the feed line. This is
most efficiently done at the antenna feed-point.
However with good loss coax on HF, matching at the transmitter end is easier
and less complex and less expensive.
Bob, K4TAX
Sent from my iPhone
> On Apr 19,
I have always been taught and thus have a concern when power supplies of
excessive capacity are used for any type of service. If the wiring, in
this case, between the power supply and the radio is #12 or #14 of any
length typically supplied by radio companies, should a short occur in
the
A wet finger and Ipana toothpaste was always my approach and solution.
Bob, K4TAX
Sent from my iPhone
> On Apr 15, 2020, at 5:47 PM, Tom & Barb Valosin wrote:
>
> Back in the "olden days" of my Ham experience, licensed 1963, on a high
> school students nearly non-existent budget, we used
I've used this source for Bird elements and dummy loads with very good
success. Although most may be "used" they are guaranteed and he has a
good return policy if needed.
Here is an example of a Bird 100 watt dummy load for $50.00
DB4303B W/N-Male Connector (NOT SMALLER DB4303 or G) For
Make sure the KP3A is active via the Menu.
Bob, K4TAX
Sent from my iPhone
> On Apr 12, 2020, at 11:51 AM, Erwin Witt - DK5EW wrote:
>
>
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>
I use my computer to run several ham digital applications. I use the same
computer to play music when doing other stuff. I use my computer to edit sound
and video files. The many applications I use do change various items, values,
and settings.
It is easy to determine what settings are
My 6M yagi shows a 5.3:1 SWR as indicated on my K3S on 28.3MHz with the
ATU in Bypass mode. When the KAT3A ATU in the radio resolves a match,
the indicated SWR indicated is 1.1:1 on the radio.
Using the same antenna but using my KAT500 ATU the best SWR resolved is
1.6:1 as indicated on the
In the F2 Setup Menu for WSJT-X change the SPLIT Function to NONE.
Then set the Radio for SPLIT mode. That way you can manually adjust VFO
A for RX and then set VFO B for the TX frequency. Just keep the audio
tone above 1200 Hz for TX.
Resolves the problem
73
Bob, K4TAX
On
I try and spend the time to recover OLD PL-259 connectors. I have some
which I've owned for 30 to 40 years. They are ugly, tarnished, and may
have phenolic insulatorsbut are darn good connectors. When I
encounter a bad or connector, I usually chop the connector off with
about 1"
My first question is "what does it do on a dummy load?" Sounds like
something related to a bad or questionable jumper cable, loose connector
or bad connectors. I find many of today's connectors have machining
tolerance errors and more so, have only "good looking" plating. While
in fact,
I’ve used the RSP-1a with HDSDR. I had to set the calibration for overall and
then for each mode. Some values were + and some - . Also I found my SDR Play
RSP-1a does drift noticeably.
Finall tossed the thing in the drawer and purchased a P3. Much more
satisfactory.
Bob, K4TAX
Sent
One basic rule from the TAX man.more crap = more problems.
Always has been, always will be.
73
Bob, K4TAX
On 4/7/2020 11:07 PM, Bill Steffey NY9H wrote:
I wiggled all connections & conections, then I took a small 50ohm
load and inserted it at the few points from the radio thru my
I’ve found that one should use a 12” to 18” jumper of known good condition and
quality. Use this jumper to connect the dummy load direct to the radio. No
switches, and no tuners in bypass mode.
The dummy load should be 50 ohms +/- 5 (thats 10%) ohms and be resistive.
Light bulbs and
From my experience Don is correct that a failure of the KPA3A will cause
distortion. Mine failed twice and was replaced by Elecraft.
The best description of the failure is “fuzzy audio”. I don’t recall the
output was showing less than 100 watts.
Bob, K4TAX
Sent from my iPhone
> On Apr
I’d say that 10 - 12 volts is too low. The supply should be 13.8 to 14.8.
Bob, K4TAX
Sent from my iPhone
> On Apr 6, 2020, at 10:52 AM, Rich wrote:
>
> I am having an issue with distorted audio once the KPA100 kicks in at about
> 10-12v.
>
> The KPA100 is putting out 100 watts
>
> I
Electric garage door opener? Most have internal SMPS units.
Drop the main breaker for the house and see if the noise goes away or
decreases on your car radio. If so, it is something in your house.
Now the hunt begins. One step at a time, being one breaker at a time.
That will allow
I find it interesting where it is stated "I have developed a loud
hum" which would imply the hum did not exist prior to this point
of observation. That being the case, then one must ask "Ok so what has
changed, been added or removed?". If it wasn't there before and
nothing has
If it was a switch in line to the vertical, I’d think you would observe a SWR
increase when that antenna was selected.
Bob, K4TAX
Sent from my iPhone
> On Apr 5, 2020, at 5:12 PM, Carl Yaffey wrote:
>
> It turned out to be using the 4-position Alpha-Delta coax switch. No problem
> until
If it worked correctly before then why would one need to add a choke?
Check connections, feed line, matching unit, and radial ground system at the
antenna.
Bob, K4TAX
Sent from my iPhone
> On Apr 5, 2020, at 4:52 PM, Buck wrote:
>
> I would bet your coax shield is acting like a radial
That is the nice thing about ham radio. There is a mode, frequency, means and
group that usually fulfills ones desires within the hobby.
Bob, K4TAX
Sent from my iPhone
> On Apr 5, 2020, at 1:42 PM, brianchapn...@rogers.com wrote:
>
> I'm glad I asked the question. Thanks for your
be plenty even with a
> compromised antenna and poor band conditions..or am I missing somthing.
>
> Brian VE3GMZ
>
>
>
>
>
> Sent from my Samsung Galaxy smartphone.
>
>
> ---- Original message
> From: Bob McGraw K4TAX
> Date: 2020-0
at different temperatures."
"If the temperature reaches 84 degrees C the KPA3 will be bypassed
until the temperature falls to stop any damage as a last-ditch backup
measure to protect your expensive power transistors from the excess
heat."
-de John NI0K
Bob McGraw K4TAX wrote on 4
Running FT-8 or PSK-31, I see 60 C from time to time. Some bands I see
the temp rise much faster indicating less efficiency.
73
Bob, K4TAX
On 4/4/2020 5:03 PM, Dave Cole wrote:
What is the recommended temp to run the KPA500 at?
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL
Andy et al;
Just quoted what is in the K3S manual. No interpretation provided. I
agree that 100 watts key down is a lot for a SSB amplifier running in CW
mode. To me that says 100 watts for 10 minutes and then RX for 10
minutes. Otherwise equal TX and RX times. Who does that?
I
Frank:
The duty cycle for the transmitter, as stated in the manual, is; CW and
SSB modes, 100% - 10 min, 100 W key-down at 25C ambient. Do note that
6M has reduce power values of 85 watts {51 -52 MHz} or 70 watts {52 - 54
MHz}
The duty cycle for JT-9, 1 minute transmit, 1 minute receive
The same PL-259 reducers for RG-8X works for RG-6. Same for BNC connectors.
Bob, K4TAX
Sent from my iPhone
> On Apr 2, 2020, at 10:13 PM, Ignacy wrote:
>
> The plus of RG6 is low price, less than 10c a foot. In receive applications,
> they seem to be lasting forever. In transmit too but
I perform "radio maintenance" about every 2nd month or so.
That includes check frequency {adjust REF CAL as necessary}, check power
output on all bands {run TX Gain Cal as necessary}, receiver sensitivity
{run RX Gain cal as necessary} and then perform a full back up of the
configuration
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