...
Jerry Moore
AE4PB, K3S - S.N. 010324
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Edward
R Cole
Sent: Friday, September 18, 2015 2:00 PM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] Product Suggestion - 500W Dummy Load
Don't have much
;kl...@acsalaska.net> Date:
09/18/2015 6:14 PM (GMT-06:00) To: ae...@carolinaheli.com,
Elecraft@mailman.qth.net Subject: Re: [Elecraft] Product Suggestion - 500W
Dummy Load
Jerry,
Certainly its appropriate to tune your antenna tuner at low power. I
have an "ancient" Drake MN-200
I tested my amp (http://sadxa.org/n7ws.html#amp) with 150' of RG8 into a
Cantenna (almost) submerged in a bucket of water. Wasn't CCS but okay for my
purposes. Using the loss in coax for an attenuator isn't unheard of.
When I was still in the work force I once had to test some cables with
Original message From: ae...@carolinaheli.com Date: 09/18/2015 1:16 PM
(GMT-06:00) To: 'Edward R Cole' <kl...@acsalaska.net>,
Elecraft@mailman.qth.net Subject: Re: [Elecraft] Product Suggestion - 500W
Dummy Load
Forgive me in advance if this is a stupid qu
On Fri, 18 Sep 2015 14:16:43 -0500, Grant Youngman wrote:
> The difference better 800W and 500W is about 2 dB. Barely noticeable.
Two db is quite noticeable when you are in the noise.
Gary
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nt: Friday, September 18, 2015 2:00 PM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] Product Suggestion - 500W Dummy Load
Don't have much to say:
Had a Cantenna from Heath in the 60's - knocked over; spilt mineral oil on
the floor, threw can away!
I have acquired "dry" loads
Hi All,
My Cantenna has sat in a bucket since I built it many many years ago.
No seen it as yet from our house move last month, but have not seem any
oil stains as yet. I am sure the boss would have told me!
73
Tim
gm4lm
On 18/09/2015 19:00, Edward R Cole wrote:
Don't have much to say:
Had
Actually, it you are talking about tube amps---typically the ones that need
tuning---then although it may seem objectionable, tuning into the actual load,
at the power level you are going to run is the appropriate thing to do.
On 9/18/2015 12:57 PM, Bob McGraw - K4TAX wrote:
There is no need,
Don't have much to say:
Had a Cantenna from Heath in the 60's - knocked over; spilt mineral
oil on the floor, threw can away!
I have acquired "dry" loads over the years rated into UHF and
sometimes to mw at flea markets and swaps. My highest power load is
500w Sierra with power meter and
Cole' <kl...@acsalaska.net>,
Elecraft@mailman.qth.net Subject: Re: [Elecraft] Product Suggestion - 500W
Dummy Load
Forgive me in advance if this is a stupid question.
Is there any reason you have to tune at full power? It seems to me that
tuning can be accomplished easily with much lower
The difference better 800W and 500W is about 2 dB. Barely noticeable.
The difference between 2500W and 800W is about 5dB. About an S-unit.
Grant NQ5T
Sent from my iPhone
>
> Now my debate is 500w vs 800w... there's a larger difference between 500w
> and 800w than between 800w and 2.5kw
ecraft@mailman.qth.net Subject: Re:
[Elecraft] Product Suggestion - 500W Dummy Load
Forgive me in advance if this is a stupid question.
Is there any reason you have to tune at full power? It seems to me that
tuning can be accomplished easily with much lower power. The same thing goes
for the ATU to the a
End of thread. We've well surpassed the list posting limit per hr on this one..
73,
Eric
Modulator
elecraft.com
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Subject: Re: [Elecraft] Product Suggestion - 500W Dummy Load
Forgive me in advance if this is a stupid question.
Is there any reason you have to tune at full power? It seems to me that
tuning can be accomplished easily with much lower power. The same
thing goes
for the ATU t
On Fri,9/18/2015 1:42 PM, Wes (N7WS) wrote:
Actually, it you are talking about tube amps---typically the ones that
need tuning---then although it may seem objectionable, tuning into the
actual load, at the power level you are going to run is the
appropriate thing to do.
Absolutely. The
an.qth.net
Subject: Re: [Elecraft] Product Suggestion - 500W Dummy Load
Don't have much to say:
Had a Cantenna from Heath in the 60's - knocked over; spilt mineral oil on
the floor, threw can away!
I have acquired "dry" loads over the years rated into UHF and sometimes to
mw at flea ma
While a dummy load that has a power rating greater than your maximum
transmit power is a worthwhile addition to any hamshack - at higher
power levels, I do not see them being used as precision measurement
devices, but only as a temporary load for the purposes of "tuning up" or
operating into a
> On 9/17/2015 8:19 PM, Byron Peebles wrote:
>> I'd love to find Elecraft offering a 500W dummy load to match the K-Line.
>> No one even makes a sturdy paint can anymore.
>>
Actually, Ameritron still makes a “Cantenna" style dummy load. I’ve had the
same one sitting under my desk for 20+
http://www.ebay.com.au/itm/DUMMY-LOAD-RESISTOR-HYBRID-TERMINATION-800W-50OHM-DC-1GHZ-17-0376-DICONEX-/191284146241?hash=item2c896c7041
Heatsink, length of coax and a plug... finished !
73
Matthew
VK5ZM
On 18 September 2015 at 09:49, Byron Peebles wrote:
> I'd love to find
Don, et al:
I do agree that we typically do not need a precision load nor do we
likely need a "full legal limit CCS" load. Most loads have a power vs.
time de-rating curve. Just following that practice will save on lots of
$$ and space.
Yes the Cantenna loads are generally suitable. I
Don't forget to add a BIG heat sink to the materials list along with
some thermal compound.
73
Bob, K4TAX
K3S s/n 10,163
On 9/17/2015 9:15 PM, Matthew Cook wrote:
Strangely, these non-inductive resistors do not last forever. When I
came home from SE Asia to Houston in 67, I filled my Heath with mineral
oil [interesting story on a Sunday], and it measured 51 ohms DC. Today,
it measures 74 ohms DC.
73,
Fred K6DGW
- Northern California Contest Club
-
Suggestion - 500W Dummy Load
Strangely, these non-inductive resistors do not last forever. When I came home
from SE Asia to Houston in 67, I filled my Heath with mineral oil [interesting
story on a Sunday], and it measured 51 ohms DC. Today, it measures 74 ohms DC.
73,
Fred K6DGW
- Northern
I'd love to find Elecraft offering a 500W dummy load to match the K-Line.
No one even makes a sturdy paint can anymore.
73, Byron
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Here you can find some nice 500 watt CCS Bird loads for $250 or so.
http://www.nm3e.com/loadSampler.htm#LoadSampler
Otherwise, it is Ameritron and MFJ that have the gallon bucket loads
with oil for under $100.
73
Bob, K4TAX
K3S s/n 10,163
On 9/17/2015 7:19 PM, Byron Peebles wrote:
I'd
My "gallon size" dummy load is not a Heath, but that was inspiration for
mine. I came across a bunch of 620 ohm 20 watt carbon resistors a long
time ago.
I wired 12 of them in parallel and put them into a gallon can of mineral
oil. That dummy load still measures 51 ohms over the bands from 80
Some non-inductive resistors do not have the coating that protects from the
oil. Those will rise in resistance over time.
This article has more than you ever wanted to know about the Cantenna and
modern equivalents.
http://www.orcadxcc.org/content/cantenna_va7jw.pdf
On Thu,9/17/2015 6:37 PM, Don Wilhelm wrote:
While a dummy load that has a power rating greater than your maximum
transmit power is a worthwhile addition to any hamshack - at higher
power levels, I do not see them being used as precision measurement
devices, but only as a temporary load for
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