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Re: LDG Z-11 vrs. RT-11 Tuner max. RF power
wb6mlc
--- In FT817@..., "Rudy Marcelletti, K8SWD" <k8swd@a...>
wrote: I bet the tuners are rated at maximum load or close to it. Z11 israted at 60 watts max PEP, 30 watts CW/AM/FM. The greater the mismatch you have, the lower the amount of power it will handle at that match. What is the antenna you are matching the Z11 to at 100 watts? If a resonant antenna simply flattening SWR at the band edges, you are probably fine. Matching a 44' dipole fed with 300 ohm twin lead using a 4:1 balun at 100 watts is another story. Hi Rudy, and all... Cortland, KA5S , already knows what happens when you exercise a Z-11 at 30 watts. His Z-11 no longer works, and I think he has to send it out for repairs. Sheesh!! Sooo, be very careful when messing around with over 30watts continuous power for tuning up. 73, Ken WB6MLC |
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Re: LDG Z-11 vrs. RT-11 Tuner max. RF power
The fact that the toroids are wound with the same wire but have
larger cores is interesting, I tend to doubt it has much to do with a higher rating power wise other than working better under a poorer match. I'd probably talk to the company and try and get an explanation - they have been forthcoming with answers and service before. WB2HVX - Paul |
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Re: 60mtr mod and Auto repeater offset?
chris
I have not done the mod so far for the reason brought up in last message
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(below). I also have another radio. D you loss the "band scan'? It is my understanding that once you modify the radio from factory settings, you lose country-specific information, such as band plans, auto-repeater +/- and offset. The radio simply becomes a general coverage transceiver and you must manually enter all information such as splits and shift directions. I don't think it is worth the trouble for just 5 channels and I have other rigs that will cover those. I think you also lose the auto-search capability that is really useful for when you enter a new area but I am not sure about that. Rudy Marcelletti, K8SWD ----- Original Message -----
From: chris To: FT817@... Sent: Wednesday, July 16, 2003 18:18 PM Subject: [FT817]60mtr mod and Auto repeater offset? I am confused as to after making the mod, do you loose the Auto repeater offset feature or do you go into the menu to turn it off to turn it on. I have heard different stories. Wud someone who has made the mod in the US let me know as to what happens to the Auto repeater offset function Yahoo! Groups Sponsor ADVERTISEMENT To unsubscribe from this group, send an email to: FT817-unsubscribe@... and for a great FAQ ( Frequently Asked Questions ) see Some really good technical info at: Please note that your messages and files sent to this group may appear anywhere on the Internet or in print without notice or compensation. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. Yahoo! Groups Sponsor ADVERTISEMENT To unsubscribe from this group, send an email to: FT817-unsubscribe@... and for a great FAQ ( Frequently Asked Questions ) see Some really good technical info at: Please note that your messages and files sent to this group may appear anywhere on the Internet or in print without notice or compensation. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service <> . |
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Re: LDG Z-11 vrs. RT-11 Tuner max. RF power
Is the capacitor voltage rating and physical size the same in both tuners?
Are the relays identical? In addition to worry about saturation of the cores on power peaks, one would have to consider whether the capacitors would be likely to arc or short, and whether the relays will handle the higher voltage/current.--Any core saturation, cap failure, relay arcing, etc. is likely to BLOW FINALS if allowed to recur/continue for long.-I do NOT have al the details, but these things should be considered, as well as the liklihood of poor harmonic suppression/increased signal distortion if you saturate the cores with too much R.F.---73, KC3VO--Bob |
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Re: LDG Z-11 vrs. RT-11 Tuner max. RF power
Didier Juges
I do not have the Z-11, but I think the problem may be if the load VSWR is
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close to the max specified (I am not sure what it is off hand), then the tuner will work harder and the toroid might get hot. You said you tested it with 100W, but you did not say if you were into a reasonably well matched load or not. Didier/KO4BB At 06:12 PM 7/17/2003 -0000, you wrote:
Hi, |
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Re: LDG Z-11 vrs. RT-11 Tuner max. RF power
Rudy Marcelletti, K8SWD
I bet the tuners are rated at maximum load or close to it. Z11 is rated at 60 watts max PEP, 30 watts CW/AM/FM. The greater the mismatch you have, the lower the amount of power it will handle at that match. What is the antenna you are matching the Z11 to at 100 watts? If a resonant antenna simply flattening SWR at the band edges, you are probably fine. Matching a 44' dipole fed with 300 ohm twin lead using a 4:1 balun at 100 watts is another story.
Try it and let us know if you needed to send it back for repair. Rudy Marcelletti, K8SWD |
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Re: LDG Z-11 vrs. RT-11 Tuner max. RF power
John Cook
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----- Original Message -----
From: tino2275 To: FT817@... Sent: Thursday, July 17, 2003 1:30 PM Subject: [FT817] Re: LDG Z-11 vrs. RT-11 Tuner max. RF power The toroids are only slightly bigger in core size,( about 3mm in diameter) the wire is the same 24#. The boards are identical and the bigger toroids fit in the same places. Martin Yahoo! Groups Sponsor ADVERTISEMENT To unsubscribe from this group, send an email to: FT817-unsubscribe@... and for a great FAQ ( Frequently Asked Questions ) see Some really good technical info at: Please note that your messages and files sent to this group may appear anywhere on the Internet or in print without notice or compensation. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
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HFpack 5MHz Chan 371 Calling, Skeds
expeditionradio
HFpack, the HF Portable Group,
now uses Channel 371 (5371.5 USB) daily for calling and has a sked every evening at 8:50PM Local Time in all USA time zones. Everyone is welcome to participate. Many FT-817 operators can be found on the HFpack calling frequencies: 5371.5 / 14342.5 / 18157.5 kHz USB. For more info: 73---Bonnie KQ6XA |
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LDG Z-11 vrs. RT-11 Tuner max. RF power
tino2275
Hi,
I have an LDG Z-11 Auto-Tuner, which is rated to 60W max. I wanted to bulid the RT-11 Tuner which is rated until 125W for the FT-897. When unpacking the kit i realized, that the two tuners are absolutely identical besides an little bigger toroid which are T68-2 in the RT11 instead of T50-2 in the RT11. The board is the same, the latch relays are the same, the capacitors are the same. Now im am thinking of sending back the unused RT-11 Kit and using the Z-11 with 100W. I already tried 100W even FM for some minutes with the Z-11 and everything seems to be fine. The toroids keep cool. Why does LDG rate the Z-11 with 60W? Is it marketing to keep a distance to the "bigger" tuners? How are your experiences when using the Z-11 with higher RF power than it is rated? 73 Martin |
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Re: remote working 817
Harry and Joyce Johnson
G'day to you, Brian,
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Okay, I am familiar with that device, but did not recognize the name. I have heard reports that it works very well in combination with the Heil HC type mike cartridges. Thanks for the info. 73, Harry NV7K On Thursday, July 17, 2003, at 12:15 AM, brian wrote:
G'day Harry, |
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Re: portable antenna in Australia
brian
I think the Joey is the only QRP "back of the rig" antenna made in Oz - but I would like to be corrected if its not the case.
From my experience on air Nico, QRP'ers are few and far between downunder, especially on SSB, also its as if the regular 100 watters dont want to know about QRP operators - I have got to the point of not mentioning my 5 watt output until the last over in the QSO - that way the original RST doesn't get downgraded :) I'd really like to see the QRP'ers get activated for the up and coming RD contest and give the big guns a run for thier money. Brian VK6ABY Subject: [FT817] portable antenna in Australia Does anyone know if there is a manufacturer for a portable plug in antenna or the like for the ft817 in Australia. The only one that comes close is the Joey Outbacker. |
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portable antenna in Australia
Does anyone know if there is a manufacturer for a portable plug in
antenna or the like for the ft817 in Australia. The only one that comes close is the Joey Outbacker. What is the experience for qrp in Australia? especially with voice, do many people have any luck with significant contacts? Nico VK6BPE |
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Re: 60mtr mod and Auto repeater offset?
Rudy Marcelletti, K8SWD
It is my understanding that once you modify the radio from factory settings, you lose country-specific information, such as band plans, auto-repeater +/- and offset. The radio simply becomes a general coverage transceiver and you must manually enter all information such as splits and shift directions. I don't think it is worth the trouble for just 5 channels and I have other rigs that will cover those. I think you also lose the auto-search capability that is really useful for when you enter a new area but I am not sure about that.
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Rudy Marcelletti, K8SWD ----- Original Message -----
From: chris To: FT817@... Sent: Wednesday, July 16, 2003 18:18 PM Subject: [FT817]60mtr mod and Auto repeater offset? I am confused as to after making the mod, do you loose the Auto repeater offset feature or do you go into the menu to turn it off to turn it on. I have heard different stories. Wud someone who has made the mod in the US let me know as to what happens to the Auto repeater offset function Yahoo! Groups Sponsor ADVERTISEMENT To unsubscribe from this group, send an email to: FT817-unsubscribe@... and for a great FAQ ( Frequently Asked Questions ) see Some really good technical info at: Please note that your messages and files sent to this group may appear anywhere on the Internet or in print without notice or compensation. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
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Re: LDG Z-11 vrs. RT-11 Tuner max. RF power
I have used my IC706 at reduced power ( 50 watts ) on occasion with
no overheating on SSB on 20 meters - is the toroid bigger in wire size or overall size - core and all ? I use it regularly on the 817 and all seems well with the switching in and out between rigs. WB2HVX - Paul |
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Re: remote working 817
brian
The standard MH-31 mike Todd - the only mod was installing the OBP in the mike itself. I was a bit hairy about installing it in the rig just in case I needed to operate without the OBP on - I'd heard the OBP could cause bad audio on FM so didn't want to take the risk of not being able to switch it out of service. Perhaps that was just a rumour or someones experience, maybe others know more about the OBP performance on FM.
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Brian VK6ABY ----- Original Message -----
From: Todd McGinnis To: FT817@... Sent: Thursday, July 17, 2003 8:49 PM Subject: Re: [FT817] remote working 817 Great information - I am curious were you using your the mic that comes with the 817 or was it an up grade? |
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Re: 817 CAT interface (re-posted)
Hi Mike,
The VPL-1 cable that programs the early VX mobiles has separate TX and RX cables, I'll give it a try and see what happens... 73 Demetre - SV1ENS Message: 7 Date: Wed, 16 Jul 2003 18:48:18 -0000 From: "Mike Richter" <m.richter@...> Subject: Re: 817 CAT interface (re-posted) Demetre The ADMS Cables do the TTL to RS232 needed for CAT Control, but they won't work without modification because they are designed to combine the Transmit and Receive signals onto one wire. They use a 3-pin connector - but the Tip is not connected. I modified mine so that I could use it with a Kenwood THF6 (I confess - I've bought a non-Yaesu Radio) and a Yaesu FT50 by using different adapter cables. Mike VK2BMM --- In FT817@..., "Demetre Koumanakos" <sv1ens@p...> wrote: Hi All, _ |
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Re: remote working 817
Todd McGinnis
Great information - I am curious were you using your the mic that comes with the 817 or was it an up grade?
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Todd - KB4KAY -------Original Message-------
From: brian <brian.may@...> Sent: 07/16/03 08:08 AM To: FT817@... Subject: [FT817] remote working 817 |
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Re: Memory management software?
The ARDTS-817 Programming Software can be used to program the
memories as well as export a .csv file. It is avilable from RT Systems for a small fee. It also allows tab-delimited exports. It also allows you to toggle a few settings, but is not really suitable for 'real time' operation of the radio, as some other programs are capable of. Micky - K1XH --- In FT817@..., "Joe" <kb6wij@s...> wrote: Many thanks to everyone!that will import/export the FT-817's memory data to a "user- friendly" file format such as a .csv file. <snip> |
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