I had to add a soft-start relay to my Astron RS-70A power supply to keep
it from popping a 16a breaker when using it on 50 Hz. But otherwise it
works fine with the transformer wired for 240v.
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
On
Back when I needed a lot of serial ports I used those USB to RS232 by Digi
and they solved a lot of problems. Now most of my rigs have USB interfaces,
if not ethernet, and those issues are in the past. And the rigs have the
sound card built in and it gets more simple. Used to have 2 or 3 rigs,
I've used a few of the Gearmo USB to RS-232 adapters, and they also seem
to hold their COM port assignments constant (on any one given machine,
of course). They just use the standard FTDI chipset with no special
drivers. Not sure how they do it, but it works.
73...
Randy, W8FN
On 7/6/2022
Sold.
Thanks for the interest.
-mike/w1mt
On Wed, Jul 6, 2022 at 7:07 PM Michael Harnage wrote:
>
> Pending already.
>
> -mike/w1mt
>
> On Wed, Jul 6, 2022 at 6:57 PM Michael Harnage wrote:
> >
> > For sale: My old faithful, Elecraft K2 serial #17xx. I bought this
> > radio already built from
I sent my K3s in for service last week. It was received at Watsonville last
Thursday. I received an email today that it had been repaired and was ready
to be shipped back to me.
That is 3 working day turn around. I don't think they can improve that very
much.
Thank you Elecraft!
Pending already.
-mike/w1mt
On Wed, Jul 6, 2022 at 6:57 PM Michael Harnage wrote:
>
> For sale: My old faithful, Elecraft K2 serial #17xx. I bought this
> radio already built from another ham in 2005.
>
> Elecraft K2 radio [2.01H 1.02]
> KNB2 noise blanker
> KAF2 audio filter
> KAT2 antenna
For sale: My old faithful, Elecraft K2 serial #17xx. I bought this
radio already built from another ham in 2005.
Elecraft K2 radio [2.01H 1.02]
KNB2 noise blanker
KAF2 audio filter
KAT2 antenna tuner [F1.03]
KBT2 rechargeable battery option - battery not included - went dead
years ago and never
and, though not always well known, ferrite cores in transformers for
feeding antennas can also saturate with excess RF power. The resulting
RF din can be discouraging to neighbor hams and folks watching TV.
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
Josh Fiden wrote on 7/6/2022
Transformer core can saturate if line frequency is too low. Except I’d be
certain KPA-500 uses the same transformer for export to 50Hz countries so your
variations are fine.
Many years ago when I was young & dumb discovered this the hard way. Customers
would take products with 120v/60Hz line
Yup. That's exactly what's happening here - except the numbers are a notch
or two lower.
73
Lyn, W0LEN
From: Andy Durbin [mailto:a.dur...@msn.com]
Sent: Wednesday, July 06, 2022 2:58 PM
To: elecraft@mailman.qth.net; l...@lnainc.com
Subject: Re: [Elecraft] KPA500 Voltage range?
"I
"I though Elecraft wanted HV to be kept at or above 60 to avoid unacceptable
IMD. No sure where I found that but don't think I imagined it. "
The problem with making measurements is that one may not like the results.
It's a nice warm afternoon here in Glendale AZ and I expect every air
Greetings everyone
I hesitate to use my KPA-500 here at this CN98pi QTH. LIne frequency here
varies daily between 58.xx-to-61.yy Hz and line voltages vary between
110-to-130VAC due to the limitations of the governor controlling the
communities 200KW hydro system (Chelan County PUD remote
"Seems a little low, but it's happy."
I though Elecraft wanted HV to be kept at or above 60 to avoid unacceptable
IMD. No sure where I found that but don't think I imagined it. Anyone have a
reference?
Andy, k3wyc
__
Elecraft
Hi Roy,
> Roy Morris, Jr. wrote:
>
> If the PRE/ATTN button is turned OFF, does this mean the receive AUTO
> preamp/attenuation is also turned off even if it is showing ON in the menu?
No. The menu setting is separate.
If automatic control is enabled in the menu, and a very large signal is
My first rig back in the late 60’s. I worked the world as a 12 year old novice
with a couple of 40 meter crystals and a dipole up about 6 feet.
David, W4SMT
On Sunday, July 3, 2022, 10:18 PM, Kyle Chavis wrote:
I guess you got off on a light sentence!! LOL
I still have my HW-16 with the
I prefer the sound of a good analog CW radio like HW16 when looking at the
newer full house radios. Many of the new SDR radios mask subtle amplitude
variations of the signal and some atmospherics as well...
de Wb8yqj Don
Carlsbad, Ca. USA
Date: Sun, 3 Jul 2022 22:36:03 -0400
I actually had an
Andy -
I'm also running 120. My HV idle runs about 68v, and under full load drops
to 50v @ 12a.
Seems a little low, but it's happy.
73
Lyn, W0LEN
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Andy Durbin
Sent:
"I don't remember the AC, can check it later, but think its 231-232."
Your use of nominal 240 would explain why your HV sag is a lot less than mine.
I have always run my KPA500 on 120.
Maybe someone who uses nominal 240 would provide their typical loaded and
unloaded HV values.
Andy, k3wyc
Andy,
Thanks, I'm looking for the VDC allowed voltage, unloaded and
loaded. I don't remember the AC, can check it later, but think its 231-232.
Gordon - N1MGO
On 7/6/2022 8:53 AM, Andy Durbin wrote:
"My kpa500 has the taps set to provide 71-72 VDC no load and drops to 60 at 500
watts."
Great info, Dave. Might be a little technical for some users.
The #1 problem most hams have is they plug their USB-To-Serial
adapters into different USB ports, and the COM port number changes.
Not only that, Windows leaves the old port number reserved much of the time.
I have an in-depth blog
"My kpa500 has the taps set to provide 71-72 VDC no load and drops to 60 at 500
watts."
Do you know how your house line input voltage varies? Mine can be as high as
122 and as low as 118 and the local transformer is less than 50 ft from my
house.
I see unloaded KPA500 voltage over 80 with
My kpa500 has the taps set to provide 71-72 VDC no load and drops to 60
at 500 watts.
Is this fine or should I change the tap from red to yellow. The yellow
gives me 79-80 no load.
Thanks,
Gordon - N1MGO
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