A few issues here. Firstly true RTTY is frequency shift keying which
uses a DC voltage change to shift the radio frequency. In the case of
MMTTY you need a simple transistor switching interface which can be
built into a serial D plug shell. From memory the circuit is in the
MMTTY manual. You would
Hi Fred,
I am asking the question simply because I was warned by another ham to
consider the possibility of a power spike on the feed to the K3 with the
choke by another ham. He was not fully sure and suggested that I post
the question to the folks who might really know the answer.
Plus if
Good Morning,
Kit now has a URL for the Kitano Key Co. at www.kitanokey.com pictures and
payment info there.
Could someone cross-post this info to FISTS please ?
Thanks all,
Niel
WA7SSA
__
Elecraft mailing list
Home:
Don, a spike is not a concern with choke for RF in the range of a few
millihenrys such as you created winding a few turns through the ferrite
core, but a larger value choke such as is often used for suppressing
generator hash and noise on a d-c line can do damage.
What happens is that whenever
I have pretty much the same operating style and opted for the following
filters in BOTH receivers:
2.8khz
1.0khz
400hz
Mike AC6JA
K3 #3215
In a message dated 2/4/2012 9:03:53 A.M. Pacific Standard Time,
rc...@verizon.net writes:
Well, I'm in for a K3, and I need to pick some
I would skip the 1.0 and replace it with either a 200 (if CW is primary) or
either the 1.5 or 1.8 if you do a lot of combat SSB.
Rick
K6LE
On 2/5/2012, at 8:54 , ac...@aol.com wrote:
I have pretty much the same operating style and opted for the following
filters in BOTH receivers:
Recent discussion of use of a filter choke with a battery powered K3
prompts my question in another application. I have a 50vdc 50amp
switching PS which will power a 1100w sspa. Output filtering may be
needed to suppress switching impulses on the 50vdc output. I have a
large filter choke
This was working when I last tried it. Now, when I do a SEND ALL TO K3,
some of them seem to go correctly, but some give a timer error
[something about time expired, it goes by fairly fast]. Do I need to
reload the K3 Memory Editor program?
73,
Fred K6DGW
- Northern California Contest Club
Since a common mode choke as is used for RFI suppression is generally
wound with both conductors of the power cord (parallel) going through
the toroid core, there is no impact on the DC since the field from one
wire is cancelled by the field from the other wire. Remember, in any
transmission
Ed,
Using a large filter choke in a relatively low voltage supply is
difficult because of the voltage drop across the choke - and that
voltage drop will change with current draw changes - so instead of
improving the regulation, it will actually worsen. The problem is in
the size wire used to
Probably not, but you may need to somehow improve the communications path to
the radio. What version are you using?
Dick
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Fred Jensen
Sent: Sunday, February 05, 2012 10:23 AM
Don and all:
Don is right, but I think that the situation is even worse than Don
describes. The power supply for a tube-type rig need only generate up to
a few Amps, not the 40 or 50 Amps that you might need for a big
solid-state rig. An inductor on the order of several Henrys and rated
for
Isn't that why such filtering is usually done by humungous filter
capacitors?
That would be my first choice to investigate.
73, Ron AC7AC
-Original Message-
Ed,
Using a large filter choke in a relatively low voltage supply is
difficult because of the voltage drop across the choke -
We had a nice net again today with good propagation. There was no
discussion, but we had 32 participants over a 24 minute period, including
three from AK and one from Hawaii. Enjoy the Super Bowl. Have a great week.
Here is the list of participants.
Station NameQTH Rig S/N
On 2/5/2012 9:54 AM, Edward R. Cole wrote:
Recent discussion of use of a filter choke with a battery powered K3
prompts my question in another application. I have a 50vdc 50amp
switching PS which will power a 1100w sspa. Output filtering may be
needed to suppress switching impulses on the
So, then, this begs a question. I have a K3 with an Ameritron AL-811H.
I key the K3 with a Heil foot switch connected to a Heil ProSet 5. When
I tried keying my amp off the red cable on the foot switch, I didn't get
any amp keying. When I connected an RCA phono cable between the K3's
key out
I guess I misused the term ground. vs shield. I think we are
basically saying the same thing just that you are using correct
terminology, My Bad.
David Moes
VE3DVY
www.Facebook.com/PTBOTheatreGuild
www.Twitter.com/PTBOTheatre
www.YouTube.com/PTBOTheatreGuild
--- Original message ---
I can only guess that the red RCA from your foot switch is dead but you could
determine that with an ohm meter. It should work as described.
KE4D has the more elegant solution, I just migrated all my cables from the old
Kenwood when my K3 arrived and have been too busy operating to integrate
Any update on this? Would be interested in doing testing
if that's helpful.
Mark n2qt
-Original Message-
From: Wayne Burdick
Sent: Friday, October 16, 2009 10:32 AM
To: Bill W4ZV
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3: SO2R-in-a-box
It may be possible to do full
I have the Heil foot switch and I have two cables. One for keying the Radio
and the other for the amp. The purpose as I understood the use was a delay
between keying both. I have the black going to the Radio, not the red. I
use a cable from the K3 to my W2 and then a cable from the W2 to my
I did it a little different but got the same results, i think. My footswitch
is a single microswitch which keys the amp and a relay. The closure of the
relay keys the K3. When I let go of the foot They let go together. Sequence.
Mel, K6KBE
--- On Sun, 2/5/12, Bill K9YEQ k9...@live.com wrote:
Please try the current version, from
ftp://ftp.elecraft.com/tmp/K3/K3FreqMemoryEditor. It's version 1.0.249.0
73 de Dick, K6KR
-Original Message-
From: Fred Jensen [mailto:k6...@foothill.net]
Sent: Sunday, February 05, 2012 1:37 PM
To: Dick Dievendorff
Subject: Re: [Elecraft] K3
I'm trying to set up my K3 to be keyed by PTT from my laptop for voice contests
to transmit the various canned messages under the N1MM F keys. I also want
to be able to key with vox when I need to give an exchange by voice, such as
when it includes a serial number that changes with each
If one would peruse the K3 Programmer's Reference, one would find that
most any menu item can be accessed though the serial port. No magic -
it is just waiting for someone to build the code to do that.
Not magic but it appears there is no computer friendly API for config items.
Everything
I saw this topic when reading older message off-line with no
connectivity, but want to put in my two-bits.
I bought some JIS screwdrivers and bits, and have used them recently on
my Elecraft gear, and find them far superior in fit to the screws to any
of my high-quality Phillips drivers.
I'm
I saw this topic when reading older message off-line with no
connectivity, but want to put in my two-bits.
I bought some JIS screwdrivers and bits, and have used them recently on
my Elecraft gear, and find them far superior in fit to the screws to any
of my high-quality Phillips drivers.
I'm
While I'm waiting on my KX3 to arrive I am trying to figure out just what I
should get for a battery.
Can't afford to pay a bunch for one either as the kitty is just about empty
now!
I'm thinking of a SLA, about 7 Ah.
The idea of a Li-ion is good but from what I've seen for prices they are
I have a fairly bare-bones K3, ie no provision for a 2nd antenna and no ATU
installed.
If I install the sub-rx, what is the penalty in terms of MDS due to the fact
that both
the main and sub rx will share the same antenna?
Thanks/73,
John AE5X
http://www.ae5x.com/blog
The subrec includes an aux antenna jack (BNC) so you will still have
possibility of two antennas. There is also the REC antenna on the KX3Va
module (if installed).
...bill nr4c.
-Original Message-
From: John Harper [mailto:j...@ae5x.com]
Sent: Sunday, February 05, 2012 10:31 PM
To:
And I'd expect NO penalty for sharing the same antenna except, perhaps, on 6
meters. The K3's noise figure is already quite low. Indeed, watching the
e-mails posted here, it seems that a lot of K3 owners fail to turn on the
attenuator on the lower bands and some even run the pre-amp which degrades
Interesting Doug. I haven't tried any of the JIS drivers.
I can't say what the factory is using (I'm 600 miles north on the Oregon
Coast), but I have noted powered screwdrivers when visiting the facility.
Eric says that they are high-quality drivers that provide a very wide range
of fine
Hi List Mates;
For those who may not be aware regarding the
copper strap around the transformer
(as Alan N1AL says) it acts as a shorted turn to external H fields
make sure that the copper strap goes around the OUTSIDE of the windings
as well as the core and NOT thru
32 matches
Mail list logo
