Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-18 Thread ae4pb
... 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

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-18 Thread mfsj
;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

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-18 Thread Wes (N7WS)
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

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-18 Thread mfsj
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

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-18 Thread mcduffie
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 __ Elecraft mailing list Home:

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-18 Thread Bob McGraw - K4TAX
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

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-18 Thread Tim
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

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-18 Thread Wes (N7WS)
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,

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-18 Thread Edward R Cole
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

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-18 Thread Wes (N7WS)
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

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-18 Thread Grant Youngman
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

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-18 Thread Bob McGraw - K4TAX
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

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-18 Thread Eric Swartz - WA6HHQ, Elecraft
End of thread. We've well surpassed the list posting limit per hr on this one.. 73, Eric Modulator elecraft.com _..._ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help:

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-18 Thread Bob McGraw - K4TAX
, 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 power. The same thing goes for the ATU t

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-18 Thread Jim Brown
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

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-18 Thread Edward R Cole
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

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-17 Thread Don Wilhelm
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

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-17 Thread GRANT YOUNGMAN
> 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+

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-17 Thread Matthew Cook
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

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-17 Thread Bob McGraw - K4TAX
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

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-17 Thread Bob McGraw - K4TAX
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:

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-17 Thread Fred Jensen
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 -

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-17 Thread Cliff Frescura
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

[Elecraft] Product Suggestion - 500W Dummy Load

2015-09-17 Thread Byron Peebles
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 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help:

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-17 Thread Bob McGraw - K4TAX
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

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-17 Thread Don Wilhelm
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

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-17 Thread Walter Underwood
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

Re: [Elecraft] Product Suggestion - 500W Dummy Load

2015-09-17 Thread Jim Brown
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