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Re: Automatic ATU Recommendations?
Hi Richard, The G4TPH loop is very inefficient- up to 10dB worse than loops like the Alex Loop and others. That is why it can handle 100W as opposed to 10W or so with most other loops. 90W is
By Dale Parfitt <parinc1@...> · #102773 ·
Re: Automatic ATU Recommendations?
Thank you, Ray, Bj?rn and Gordo! I still have a bit of time before needing the ATU I think, as I have just purchased a ML40HP MK11 Remote Tune Magloop from G4TPH
By Richard G4WKW · #102772 ·
Re: Automatic ATU Recommendations?
At the risk of offering a completely contrary viewpoint, may I suggest not using a tuner but using a resonant antenna instead? Over on your side of the pond, HyEndFed makes some nice multiband band
By T Mckim · #102780 ·
Re: Automatic ATU Recommendations?
I have used the Elecraft T1 with my FT-817 during back country canoe trips in Northern Ontario. It has performed very well. Even without the FT-817 control cable it tunes with just a couple of button
By Gordon · #102771 ·
Re: Automatic ATU Recommendations?
The T1 is pricey but super small. I personally love it. Bj?rn SM7IUN 2016-11-30 23:05 GMT+01:00 Ray Sills raysills3@... [FT817] < FT817@...>:
By Bj?rn SM7IUN · #102770 ·
Re: Automatic ATU Recommendations?
Hi Richard: I¡¯d go with the Elecraft T1. It¡¯s a great tuner on it¡¯s own, but it also is available with a cable to connect it to the FT-817. That way, when you QSY, the system will remember
By Ray Sills · #102769 ·
Re: Automatic ATU Recommendations?
Richard I recommend the Elecraft T1 tuner with the FT-817. I take the combination everywhere I go, including to Cambodia last year. With a dipole cut for about 21MHz, I can tune it for 17, 15, and
By Bruce VK2EM · #102777 ·
Re: Tx oscillation on 432 MHz
The paper insert from Yaesu mentions "abnormal operations on 430 Mhz when using an external power supply and the whip antenna, especially with the antenna in close proximity to surrounding metal
By Richard Jones · #102768 ·
Automatic ATU Recommendations?
I recently joined this awesome group and would be grateful of some advice and recommendations. I renewed my license in the summer after too many years of being inactive and have been concentrating on
By Richard G4WKW · #102767 ·
Re: Tx oscillation on 432 MHz
If you need the ferrite bead, your radio ?should be modified! The phase reversal is safe for EITHER board, old or new, and increases reliability of the finals, by greatly reducing the tendency
By bob curry · #102765 ·
Re: Tx oscillation on 432 MHz
The mod for an FT-817 PA very clearly written up by Bob, KC3VO, is to be found in the files section, file name *ft-817PAboardmod.pdf* The mod is described for an FT-817 (pre-ND), The 817ND PA uses
By G8DQX list · #102764 ·
Re: Tx oscillation on 432 MHz
Thanks very much Robin 73 Andrew VK1DA VK2UH
By Archiver · #102763 ·
Re: Tx oscillation on 432 MHz
Thanks so much for letting us know that. One of the problems with the closed Yahoo group is that the search tools are tricky. Once I saw your message, I finally found it in a "Digital Hams.net"
By Doug Jackson · #102766 ·
Re: Tx oscillation on 432 MHz
"You can lead horses to water, but you cannot make them drink"-- This phrase seems to apply to the 817 group, since many YEARS ago, I posted a FIX for this oscillation, to eliminate blown
By bob curry · #102762 ·
Re: Tx oscillation on 432 MHz
Andrew, and anyone else who never had the documentation or who lost it, the original Yaesu note is available, scanned, for information and fair
By G8DQX list · #102761 ·
Re: Tx oscillation on 432 MHz
Hi, When the problem first manifested itself the radio was powered by an internal 3S LIPO (from Windcamp) battery. When retested on the bench it was powered by an external 3S LIPO via the
By Archiver · #102760 ·
Re: FT817 audio mod - PCB pad delamination
Thanks Simon! After spending some quality time with the service manual I was able to trace Vol 2 (the signal I'm working with) to Pin 49 on J1008 on the main board, as well as a few other points that
By John VA7JBE · #102759 ·
Re: Tx oscillation on 432 MHz
Folks, something to keep in mind¡­ when a PA is replaced, rarely does a tech check every band and mode, while we assume that this is done. I doubt it if anyone checks everything out. I suspect a
By [email protected] <kg9hfrank@...> · #102755 ·
Re: Tx oscillation on 432 MHz
Hi Ken When testing it in the shack, I monitored the output signal on my ic706. When it was working ok, the signal was sounding good on all modes. but when the output power went straight to the max
By Archiver · #102754 ·
Re: Tx oscillation on 432 MHz
blockquote, div.yahoo_quoted { margin-left: 0 !important; border-left:1px #715FFA solid !important; padding-left:1ex !important; background-color:white !important; } I seem to remember a piece of
By donaldhawbaker · #102753 ·