ld me,
"if you don't have it documented on paper, it didn't happen". Put this in
the FWIW dept.
Rich, N0CE
- Original Message -
From: "Milt -- N5IA"
To: "Richard Fjeld" ; "elecraft posting"
Sent: Monday, August 06, 2012 1:11 PM
Subjec
On 8/6/2012 11:59 AM, Monty Shultes wrote:
> "I-squared R drop",
I'm sorry, but you are mistaken. Voltage drop is IR. The POWER lost in
the resistance of the wire is I squared R.
To complicate things even more, the current drawn by any power supply
with a capacitive input filter is a pulse,
Let's end this thread at this time.
73,
Eric
---
www.elecraft.com
On 8/6/2012 1:43 PM, Don Wilhelm wrote:
> The thing that matters is the voltage reduction under load.
> "IR" is correct for the voltage reduction.
> "I squared R" would represent the power reduction from the power panel
> to the s
The thing that matters is the voltage reduction under load.
"IR" is correct for the voltage reduction.
"I squared R" would represent the power reduction from the power panel
to the shack.
73,
Don W3FPR
On 8/6/2012 2:59 PM, Monty Shultes wrote:
> Actually it's "I-squared R drop", and a 1/2 reduct
August 2012 5:00 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA-500 110 or 220?
Actually it's "I-squared R drop", and a 1/2 reduction in current results in
a 75% loss reduction.
Monty K2DLJ
On Aug 6, 2012, at 1:27 PM, Bob wrote:
> Electric meters measure current c
Actually it's "I-squared R drop", and a 1/2 reduction in current results in a
75% loss reduction.
Monty K2DLJ
On Aug 6, 2012, at 1:27 PM, Bob wrote:
> Electric meters measure current consumption on both 120v legs when
> calculating total watt hour consumption. So it matters not one bit if the
On 8/6/2012 11:21 AM, Ron D'Eau Claire wrote:
> If the voltage rises too much the amp will shut itself down to prevent
> damage. If the key down voltage drops below 60V IMD increases and the
> maximum power available may be less than 500 watts.
This mostly an issue on 6M, where the output devices
In some 120VAC installations with significant voltage droop under load, it's
a challenge to find the right tap so the 60V output of the KPA500's high
voltage supply doesn't sink too low "key down" or rise too high "key up".
The 60V supply is not regulated.
If the voltage rises too much the amp wil
-Original Message-
From: Richard Fjeld
Sent: Monday, August 06, 2012 9:53 AM
To: elecraft posting
Subject: [Elecraft] KPA-500 110 or 220?
I have read that an Electric Meter (wattage meter) will run up the bill more
if the load is not balanced across the two feeders in the meter. By
Electric meters measure current consumption on both 120v legs when
calculating total watt hour consumption. So it matters not one bit if the
loads are balanced or unbalanced from a billing point of view. Rumors to
the contrary are simply not correct.
The reason for running the amplifier at a hig
Jim, W6JHB wrote:
"You are absolutely correct - less current, less wire heating, better
voltage regulation. In my case all are offset by what the XYL would do to
me if I told her I was going to have a 220V run going into one of our
bedrooms!"
It's all in how you sell it, Jim. "But honey, we need
Bill wrote;
I would like to hear opinions on if it makes any difference to configure the
KPA-500 for 220 volts? Is it any more efficient? Seems to me that 110
would be the way to go for portability as long as efficiency is the same or
nearly the same.
73 Bill NZ0T
I have read
You are absolutely correct - less current, less wire heating, better voltage
regulation. In my case all are offset by what the XYL would do to me if I told
her I was going to have a 220V run going into one of our bedrooms! Ouch! :-)
Jim / W6JHB
On Sunday, Aug 5, 2012, at Sunday, 11:14 PM, Ji
On 8/5/2012 7:29 PM, NZ0T wrote:
> I would like to hear opinions on if it makes any difference to configure the
> KPA-500 for 220 volts? Is it any more efficient?
The advantage of 240V operation is better voltage regulation, due to
half as much IR drop in the wiring between the breaker panel and
Like Roger, W5RDW, I run my KPA500 from a standard 117V wall outlet in a
downstairs bedroom. This room also supplies power to my large iMac and several
other 117V devices - not a single problem, and I've often run it between 500 -
550 watts on 160 - 10. (Not 60 or 30 meters, of course…) :-)
73,
When I moved my shack inside the house from the garage (where I had 220V
readily available), I had to use 110V all around. I did not want to run a
220V line to an inside bedroom where my new shack would be. I have noticed
no difference from when it was outside in the garage running off 220V. I
usua
I would like to hear opinions on if it makes any difference to configure the
KPA-500 for 220 volts? Is it any more efficient? Seems to me that 110
would be the way to go for portability as long as efficiency is the same or
nearly the same.
73 Bill NZ0T
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