On 2/25/2019 7:58 PM, h...@optilink.us wrote:
Funny though, when I find a supply with the -VDC tied to chassis ground, I
always pull it - some Astrons do and some don't. All of our other linear
supplies float (HP, QJE, Acopian).
RIGHT!
73, Jim K9YC
YES! This is a chronic problem with Astron supplies -- I've never seen
one that didn't have this problem! I first discovered and documented
this issue almost 10 years ago. In one supply, the two clam-shell
sections of the chassis were also insulated from each other by paint!
This failure
I have had very good results with Astron, but I treat their products
like MFJ's: When I get a new one, I always open it up, check that
everything is tight, remove paint if needed, look at the soldering, etc.
It is worth checking the tightness of the connections to the capacitors
every 20 years
I have 2 Astrons and they are great supplies. On both replaced the caps and all
was very quiet
Ken WB8PKK
Sent from Yahoo Mail on Android
On Mon, Feb 25, 2019 at 8:04 PM, h...@optilink.us wrote:
Filter caps bad? AC on the DC supply side maybe? A well made linear supply
does not make
"MODES: CW, PH”
http://www.cqp.org/Rules.html
wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)
> On Feb 25, 2019, at 7:37 PM, j...@kk9a.com wrote:
>
> Is FT8 allowed in the California QSO Party?
>
> John KK9A
>
>
> Bill Frantz AE6JV wrote:
>
> In addition to
There's no digital in CQP. My mistake was when I was running SSB.
73 Bill AE6JV
On 2/25/19 at 7:37 PM, j...@kk9a.com wrote:
> Is FT8 allowed in the California QSO Party?
>
> John KK9A
>
>
> Bill Frantz AE6JV wrote:
>
> In addition to Bob's suggestions, check that your aren't in REV
> mode
But at the Pub a pint is 20 ounce’s not 16 as in the US...Sorry Eric.
Dave NE5DL
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Post:
Filter caps bad? AC on the DC supply side maybe? A well made linear supply
does not make noise that has to be filtered otherwise. All switching
supplies must be cleaned up because their design generates noise.
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of K9MA
I bought a Rackmount 35amp Astron when I started working at my office (the
office bought it). We turned it on in 1993 and it is still on today. I have a
50 amp at home that besides the crappy meter lights (they now are illuminated
by LEDs!), runs like a champ.
Funny though, when I find a
Is FT8 allowed in the California QSO Party?
John KK9A
Bill Frantz AE6JV wrote:
In addition to Bob's suggestions, check that your aren't in REV
mode (hold the left side of the moce key). I remember one time I
managed to turn that on in a CQP contest while calling CQ, and
some other station
I have two recent vintage Astron RS-35M units. They still use the exact
same 723-based regulator circuit that they have used for thirty years or
more, so the design hasn't changed. What **may** have changed is the
build quality. I carefully inspected both of mine right after taking
delivery. I
In addition to Bob's suggestions, check that your aren't in REV
mode (hold the left side of the moce key). I remember one time I
managed to turn that on in a CQP contest while calling CQ, and
some other station kindly pointed out my error.
73 Bill AE6JV
On 2/25/19 at 5:13 PM,
Mac·Gy·ver
Verb, informal (U.S.): To make or repair (an object) in an improvised or
inventive way, making use of whatever items are at hand
* * *
Last weekend I had the good fortune to be on the Kern River, in the southern
Sequoia range, with excellent hiking *and* RF conditions. I
I have and use the same configuration as you describe. Make sure both
VFO A and VFO B are in the same mode. Be sure you are in DATA A
mode. With DATA A mode it is a USB mode as used for FT-8.
The right side of the display on the radio should show SPLIT just above
the VFO B frequency,
I have a ~30-year old Astron 13.8 VDC 20-amp supply that I got when it was
retired from a project at work. I used it for low current applications for a
few years, then it went to storage for about 5 years.
One of the two power transistors failed a few months ago and this took out some
other
I have personally found several instances in power supplies I either own
or have repaired where the green power wire lug is firmly attached by
the bolt and nut. It however was nicely insulated by the paint!.
Visual inspection is the best way to determine if an issue exists. Do
take time
And in the UK and Ireland they still measure body weight in stone...
1 st = 14 lb = 6.35 kg
73
Frank
W3LPL
- Original Message -
From: "Jim Rhodes"
To: "ab2tc"
Cc: elecraft@mailman.qth.net
Sent: Tuesday, February 26, 2019 12:38:53 AM
Subject: Re: [Elecraft] OT: Metric
Who makes a better linear power supply, especially large ones?
John KK9A
Fred Jensen k6dgw wrote:
I've given up on Astron despite the fact that many people say they never
have troubles. Apparently, Astron does not have a supplier for inside
star washers for screw/bolt connectors, I've found
K3s + KAT500 + 80m dipole
Using DATA mode on all bands, and have been ever since FT8 was invented.
This evening was my first look at working FT8 on 80 meters. The tuner is giving
the radio a 1.0:1 match, and the waterfall is busy.
But there’s no decoding happening! I checked BND MAP in the
That's interesting. About the only way I know that a linear supply can
be noisy is if the regulator oscillates. That can easily happen. Most of
them use emitter followers, which are often unstable driving a
capacitive load. That's usually easy to fix by inserting a small
inductance between the
On Monday, February 25, 2019 4:26:40 PM CST Rose wrote:
> I've found instances of regulation failures caused
> by loose hardware.
With the RS-35m Astron Linear PS I have issues with noise. I purchased the
PS because everyone around me swears that they are great. Well, from my
experience the
In the UK the still go down the pub for a pint though.
Jim Rhodes
K0XU
On Mon, Feb 25, 2019, 17:08 ab2tc wrote:
> Hi again,
>
> Hopefully Eric will find it in his heart to let this thread continue.
>
> Yes, we are. Booze and wine are now sold by the liter. Curiously beer is
> generally not. In
I had a similar, if not worse, problem during the CW DX contest a week ago.
On Day 1 everything worked perfectly, including 15 meters. On Day 2 everything
except 15 meters worked perfectly. On that band the KPA1500 would show a
full-scale over-range power output and then shut itself down.
On 2/25/2019 2:05 PM, ab2tc wrote:
> So, should the US commit itself to mandate the use of SI units for all
> commerce and signage? I don't know. It would be costly for sure.
I prefer the SFF (Stone, Furling, Fortnight) system that was used in
engineering back in the Dark Ages before Elecraft
Center and Centre are interchangeable. They mean the same. Although Canadian
I use the American center, liter and kilometer; to me it makes sense. Spell
it like it sounds. In Canada we still buy lumber 2 x 4 in 8 ft lengths and
sheets 4 x 8. We need two set of wrenches Imperial and Metric. Should
Folks - Let's end this thread at this time. Its already past the OT posting
limit.
For interested readers, just search the nabble Elecraft list archive on 'metric'
and you will find a wealth of past postings on it.
For the record - due to my engineering profession, I'm immersed in the metric
Here are the results of the ssb net from yesterday 2-24-2019. Remember the net
meets every Sunday on 14.303.50 at 18:00 Z.
Elecraft SSB Net 2-24-2019
WB9JNZ Eric IL K3 4017 Net control
K7JG John WA KX3 3519
K8NU/P Carl
For what it’s worth, metric units outside of the US are often spelled
differently. For example, “litre” rather than the US-spelt “liter”, or
“kilometre” rather than the US term “kilometer”.
A “meter” is a device on an instrument panel! This is likely a UK or European
holdover.
Hi again,
Hopefully Eric will find it in his heart to let this thread continue.
Yes, we are. Booze and wine are now sold by the liter. Curiously beer is
generally not. In my opinion gas stations should be the next in line to
convert. I am sure modern pumps could easily be reprogrammed to display
How old is your PS?
73,
Bill
K9YEQ
https://wrj-tech.com/
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Fred Jensen
Sent: Monday, February 25, 2019 4:52 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] OT: Astron linear PS regulation issues
I've given
Larry,
I have the same combination (KX3 + KXPA100) and my KX3 drives the amp
fully with output of 5 to 7w. Takes more drive on 6m. Each
band takes a different drive level. It seems to me that does not
track between bands. I have to manually change the drive level.
But then I am not
I've given up on Astron despite the fact that many people say they never
have troubles. Apparently, Astron does not have a supplier for inside
star washers for screw/bolt connectors, I've found almost crumbly,
crystallized cold solder joints on the point-to-point wiring terminals
[in one
Yep, we're going metric ... inch by inch.
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 2/25/2019 2:12 PM, Jim Rhodes wrote:
Well we first authorized use of the metric system in 1866, we are working
on getting around to it. Don't rush us!
Yep, we're going metric ... inch by inch.
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 2/25/2019 2:12 PM, Jim Rhodes wrote:
Well we first authorized use of the metric system in 1866, we are working
on getting around to it. Don't rush us!
I've found instances of regulation failures caused
by loose hardware. In particular the nuts atop the
filter caps that hold the regulator PC board loosen
and simply tightening then will cure the issue. This
appears to be caused by compression of the PC board
material …"cold flow" to some
Well we first authorized use of the metric system in 1866, we are working
on getting around to it. Don't rush us!
On Mon, Feb 25, 2019 at 4:06 PM ab2tc wrote:
> Hi all,
>
> I am sorry, Eric, but I want add another comment to this. I was raised and
> educated in Norway which I believe is one of
Hi all,
I am sorry, Eric, but I want add another comment to this. I was raised and
educated in Norway which I believe is one of the original signatories to the
metric system. I have come to deal with the non-metric units common here
since I moved here and I don't find it a big problem.
But I
Just for*correctness*, it's not 2 African countries but Liberia and Myanmar.
OK, Liberia is in Africa alright; BUT, Myanmar is in Asia
I was last there (as 9M2JJ) in January, 1965 and it was Brurma back then
Cheers, Jan K1ND
__
John and all,
A 25 amp power supply should adequately power the K3 at 100 watts - but
check the K3 specifications if contemplating 100 watts for DATA modes.
The K3 is rated for ICAS and not for continuous duty.
Also keep in mind that the K3 is a bit different than other amateur
transceivers
There are two adjustments in my Astron 35A supply. One on the board,
adjusts the voltage. Another on the meter, calibrates the meter. I
found my output on the terminals was almost a volt low even though the
meter read full.
I adjusted the pot on the board and then calibrated the meter
Poor regulation is a common failure mode with Astron linear power
supplies. The problem is equally likely to be either in the power supply
section or in the regulator section.
There's an excellent troubleshooting and repair procedure here:
I suspect the problem is the power supply and Don has some good
suggestions. I am not sure what the actual K3 power requirements are.
FWIW, Astron's are rated for ICS, if you really want 25 amps continuous
you need a 35 amp linear power supply.
John KK9A
Don Wilhelm donwilh at embarqmail.com
M
Thanks Don. I’m sure the problem is with with the Astron as you suggest. I’ll
try your suggestions when I’m back at home in “shop mode,”
Jimmy
> On Feb 25, 2019, at 2:30 PM, Don Wilhelm wrote:
>
> Jimmy,
>
> Astron power supplies have a nasty habit of having loose wiring terminals.
> They
Jimmy,
Astron power supplies have a nasty habit of having loose wiring
terminals. They use only pressure to hold the ring terminals on the
inside to the terminal bolts.
If you can detect even a slight rotation of the bolt when tightening
terminals on the outside, remove the covers and
I had a similar problem. I checked the key-down voltage at my power supply, and
was surprised to see that it was low (I don't recall the exact voltage).I'm
using an Astron linear power supply. I replaced the voltage regulator in the
power supply, and the problem was solved.73,Don Sayler
I have a K3 that behaves similarly to what Mike described. I switched from an
Astron 25 amp (15 years or more old) power supply to a switching power supply.
Problem solved. One would think the problem was my Astron power supply, but I
don’t see any such power drop when I use my Astron with
Hi Mike,
What are your voltage readings at the power supply end of your
six foot power cords?
None of my K3s do behave the way you describe.
73
Frank
W3LPL
- Original Message -
From: "mjpilgrim"
To: elecraft@mailman.qth.net
Sent: Monday, February 25, 2019 6:55:01 PM
At first i suspected my Solar power system which was installed a year ago,
but now I plugged my K3 S/N 7317 directly into my 25A switching DC power
supply, and when key down, 100W in CW, on the internal K3 Power Meter i see
a voltage drop from 13.6 to 12.0VDC. My power cord is a 6', 10ga
Ciao Philippe,
the CAT speed in the P3 must be 9600, Expert can't go faster, so, CAT
settings are Kenwood-9600.
On teh P3 use the rs232 port DB9, for PC and SPE.
Here is a link to a page on my site where a working connection is
explained.
Explanation is in italian, but schemas are available
Hello,
I have read previous posts from this reflector and instructions from
different sources without being able to have my K3 connected to SPE
amplifier with CAT.
I have upgraded my K3 (S.N.#4004) with the new KIO3B so I connected my
computer (running Windows 10) with the USB cable and the P3
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