Just like the 1930s vintage Western Electric at WKOP when I worked there in the
early 60s. When you turned it on, it went click-click-click-click BLANG.
Two tubes, 12 kV on the plates, about 1 amp plate current for 5 kW output.
Victor 4X6GP
> On 19 Jan 2020, at 1:45, Fred Jensen wrote:
>
>
Actually there were programmer rules and conventions while writing which did
require that the managers maintained the proper procedures. These conventions
disappeared, programmers quit document lines of code and then all hell broke
loose. Do you think this changed today? Layers and layers of
I used to tell my little brother that the reason computers were getting
more powerful and more expensive was because programmers were paid too much
and when they got that big check they would just go out and buy a bigger,
more powerful computer and then would write software that wouldn't run
Perhaps you haven't noticed.
The software is never finished because we now have to upgrade:
Our cameras
Our radios
Our TV's
Our Computers
Our GPS boxes
It never stops. How I miss my KWM2A!
Oh and now that the photo cells have gotten better than film ever was..
we have to upgrade our
10 KW homebrew FM broadcast TX [not kidding -- KPFK 90.7 Los Angeles in
the late 50's, 4 4-1000A's* in parallel driven by a 1 KW stage] had a
step-start using mechanical time-delay relays.** It limited the inrush
current to the filter capacitors of the 5.5 KV plate power supply. It
was part
Good Afternoon,
Let's take a peek into the misty past; when the K1 was young while the
KPA100 was taking its own time to reach the market. The Elecraft CW Net
began on June 6, 2002. I picked the date to honor my then recently
departed uncle who was a paratrooper that day. It began with a
Hello All,
Does anyone know if there are any issues with the KPA 1500 when used in a multi
transmitter contest environment??
Thanks in advance for any info of input on this!!
73,
Ted K2QMF
Meghan Markle Confirms Unfortunate News
On 1/18/2020 12:14 PM, Victor Rosenthal wrote:
The power switch in some of those amps like the SB220 or TL922 is
highly stressed. T
Another cause of high input current is transformer saturation. If the
core happened to be fully magnetized in one direction when last turned
off, and the AC
On 1/18/2020 12:14 PM, Victor Rosenthal wrote:
The power switch in some of those amps like the SB220 or TL922 is highly
stressed. T
My late '70s vintage Ten Tec Titan amps include circuity to minimize the
turn-on transient, at least some of which is due to charging of the
capacitors in the
Well, I don't totally agree. The power switch in some of those amps like
the SB220 or TL922 is highly stressed. There is a big "thump" sometimes
when they are turned on at the right point in the cycle. I also believe
that slower application of filament voltage to a 3-500z or similar
lengthens
Bob,
It isn't just a problem in Sweden. We have seriously here in the
U.S. Panels put in my Solar City annd a another company, I can't
remember the name, are also rather problematic. They make no effort to
suppress the noise caused by both the equalizers nor the power
converters. There
Thanks to Steve for the menu item, but that doesn't appear in my KAT500
manual and the utility software doesn't show that as an option.
Must be a KPA1500 thing.
73 de Chuck, WS1L
On Sat, Jan 18, 2020 at 11:57 AM Steve Lawrence via Elecraft <
elecraft@mailman.qth.net> wrote:
> Menu:
>
> ATU
"Amplifier" as in all inclusive. The models I referenced all have
internal power supplies, with exception of 2 models. The design of
the transformers in these amplifiers are such that inrush current does
not exceed maximum magnetization current.
73
Bob, K4TAX
On 1/18/2020 12:55 PM,
NO amplifier needs inrush protection - it is the POWERSUPPLY that needs it
no matter how it is implemented.
So the answer is not an easy "NO" or "YES" but a definite "it depends"!
Roger, DL5RBW
-Original Message-
From: elecraft-boun...@mailman.qth.net
The Swedish Electrical Safety Agency and the Swedish Energy Agency are
investigating radio interference from installations with solar panels
Sweden's national amateur radio society SSA reports: Solar panels are becoming
more and more common. An increasing problem is that interference can be
Thanks, Ron! I understand NO, hi!
John K7FD
> On Jan 18, 2020, at 10:06 AM, Ron Durie wrote:
>
> NO. Solid state amps do not need inrush protection. 73's
>
> Ron WB4OOA
> Elecraft K-Line
>
>
>
> __
> Elecraft mailing list
>
Solid state amps do not require added inrush protection.
And most correctly designed tube amps do not need inrush protection.
In cases where the design, usually HB ones, have excessive current
capacity in the heater or filament transformer, or in cases where HV
transformers have
NO. Solid state amps do not need inrush protection. 73's
Ron WB4OOA
Elecraft K-Line
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Help: http://mailman.qth.net/mmfaq.htm
Post:
Menu:
ATU HiSWR Retune (per band) - default is OFF
Set to ON (per band)
Change antennas, a "dit" will switch to the learned tuning solution, per bin,
for the newly selected antenna.
See the manual section: "Multiple Antennas and External Antenna Switches."
73 - Steve WB6RSE
Does an inrush limiter like the Ameritron ICP-240 offer any benefit to the
KPA500?
Thanks, John K7FD
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Post:
Sorry, I mis-spoke in my last msg.
The Six-Pak is connected to Ant1 on the KAT500, not the KPA500!
73, WS1L
On Fri, Jan 17, 2020 at 10:07 AM Gill via Elecraft
wrote:
> I have two directional wire antennas for 160-40m that each work quite
> well with the KPA1500. I can electrically switch
I'd like to know more about this, as it would solve an issue I have.
I have two stations, with multiple antennas switched between them with an
Array Solutions Six-Pak. On 80 and 40 I have both a vertical and a dipole,
and often one is better than the other. The tuning on them is different
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