Re: Measuring the output power
Measure the peak-to-peak voltage across a dummy load with an oscilloscope.
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Mike G8GYW
By
Mike
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#114921
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Re: Measuring the output power
A swr meter aint gonna give you a power reading is it, its gonna give you a swr reading, unless you get something like a cross needle power/swr meter or the like, as for the mulitmeter, err i dont
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Michael Newbury SA4MDN
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#114920
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Measuring the output power
Hello,
Beside getting a SWR meter is there a different way to measure the actual power from the ft817? ?Could I use a multimeter?
regard,
By
on3plz
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#114919
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Re: Power question - Battery related
Hi, I personally use 4 Li-Ion cells and I get more than enough capacity to
tackle mountain outings in QRP. with an excellent power/weight ratio. Since
4 cells produce a higher voltage than the
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Franco Corsi
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#114918
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Re: Power question - Battery related
Thanks for the info Steve. Sounds like the way to go.
Kevin Mullens
By
Kevin - K5KTM
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#114917
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Re: Power question - Battery related
Kevin, The WindCamp Battery is Way OVERPRICED and one of the (3) 3000 Mah Cells will "Fail"even in conservative Use, I know I found it the Hard $ Way.
Real 3000 Mah NickelMetalHidride Packs are
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Steve Sawicki
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#114916
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Re: Power question - Battery related
Well it turned out to be the battery. It¡¯s been working well for a while (10 months or so) but didn¡¯t have enough poot for the radio to recognize it. I ended up putting my much larger 12ah that I
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Kevin - K5KTM
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#114915
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Re: eBay filters
Thanks John. I don¡¯t have much use for the CW filters as I am an SSB op. Haven't used CW since my test haha. I think I¡¯m going to skip the filter entirely. Doesn¡¯t seem to make enough difference
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Kevin - K5KTM
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#114914
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Power question - Battery related
Hi all. I am experiencing a weird situation, I apologize ahead of time as I am a newbie to the 817.
When I plug in an external battery the radio is not seeing it. I have a car power adaptor which it
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Kevin - K5KTM
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#114913
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Re: eBay filters
The only good filter is a cw one by Yaesu
The Yaesu SSB filter is a bit better. qRP ARCI has an article on them and
the graph showed some tighter skirts but I found it wasn't worth $279
Canadian for
By
John
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#114912
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Re: eBay filters
At The Last Local? "Flea Market" I Noticed? TWO FT-817's one a ND and one a original? For Sale,? One? Full "Kit" on the "original" included all of the standard Items items even the whips, battery
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Steve Sawicki
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#114911
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Re: How to assemble an Collins filter + Board for FT-817/857 and save $$$!!!
I posted *two* (2) vendors. Page down and look for the vendor in *UK*. The *Collins 500hz filter* (w/o board) is showing up overseas but you must *search and evaluate reliability of the vendor*. I
By
W6ZZ
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#114910
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Re: eBay filters
There are a couple of videos on YouTube of them, one in particular has some halfway decent audio and I was able to hear a little difference. The mutants just sounded a little richer in audio. But if
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Kevin - K5KTM
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#114909
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Re: How to assemble an Collins filter + Board for FT-817/857 and save $$$!!!
The item you posted is no longer available.
Clyde KC7BJE
By
Clyde Lambert
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#114908
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Re: eBay filters
Is there a way to implement the MAX4581 IC to use as the filter? Around $2 plus some passive components.
Joe N1KHB?
Sent from AOL on Android
On Sun, Jun 16, 2024 at 12:34 PM, Gigu
By
Joseph Wonoski
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#114907
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Re: eBay filters
OK. The internal Murata filter is CFJ455K-14 (6 Db bandwidth of +- 1.1 - +- 1.3? kHz). The boards available for around $100.00 are CFJ455K-13. I cant find a data sheet on the -13 filter but
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Pat Campbell
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#114906
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Re: eBay filters
What's insane money?? Collins? is supposed to be good stuff..
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Gigu chan
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#114905
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Re: eBay filters
What¡¯s the price difference?
Gig N2GIG
By
Gigu chan
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#114904
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Re: eBay filters
The Murata filters are similar to the internal filter in the radio. Probably a little tighter bandwidth but not near as good as the Collins mechanical filters. I'm not sure what the filter number is
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Pat Campbell
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#114903
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Re: eBay filters
Understood but do they work well enough to make a difference? I¡¯m working on a budget and people are asking insane money for the Collins filters, be they OEM or Inrad.
Thanks
Kevin
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Kevin - K5KTM
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#114902
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