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CT-62 Noise problems
baamaster
Apologies if this was beaten to death before. I searched the archives
and saw no resolution. When I connect my CT-62 to my FT-817 the noise level (FM, squelched) rises to S3-S7. Disconnected there is no rise in the noise level. At first I thought the noise was caused by my laptop, but I shut down power to the house and the noise level still rises when I connect the cable. Any solution? Thanks Bill KA4GAV |
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Re: LDG Z-11 vrs. RT-11 Tuner max. RF power
--- In FT817@..., "Rudy Marcelletti, K8SWD" <k8swd@a...>
wrote: I tune without amp, just the FT817 on AM or FM, 5 watts, then shutthe Z11 off, then turn the amp on. I monitor the SWR on the FT817 meter. So far, pretty good. Rudy Marcelletti, K8SWDhmmmmm............... i would think that the swr between the rig and amp would always be close to 1:1. the amp to the tuner to the ant would be what is the concern. anywho - if you have the tuner close - even with 50w it should do well unless you are really tuning around on 80m or 40 using a hamstick - but you should know better........... 73 bob/wk4rc |
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Re: LDG Z-11 vrs. RT-11 Tuner max. RF power
Rudy Marcelletti, K8SWD
I tune without amp, just the FT817 on AM or FM, 5 watts, then shut the Z11 off, then turn the amp on. I monitor the SWR on the FT817 meter. So far, pretty good.
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Rudy Marcelletti, K8SWD ----- Original Message -----
From: Cortland To: FT817@... Sent: Friday, July 18, 2003 7:28 AM Subject: [FT817] Re: LDG Z-11 vrs. RT-11 Tuner max. RF power I was testing at 60 watts and THAT is indeed too much, at least before matching has been achieved. I have one or more relays with bad contacts now. Cortland --- In FT817@..., "wb6mlc" <kac@i...> wrote: > 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 |
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Re: Z-11 and Tokyo HiPower
hi -
i completely agree with the suggestion of doing initial tune with amp in standby mode - tuner should easily handle the 50w output of the amp. bob / wk4rc --- In FT817@..., kc3vo@a... wrote: You are correct as to placement. It works fine, but TUNE with theamp in STANBY/OFF, using only 2-3 watts from the barefoot FT-817, then,when tuning is COMPLETE, switch on the amp, and enjoy!----KC3VO, Bob. |
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Re: LDG Z-11 vrs. RT-11 Tuner max. RF power
tino2275
The relay are exactly the same in Z11 and RT11. May be it would have
been happened anyway. The RF Problem in the CPU should be the same problem with the rt11, because the board seems to be the same. One mod one could do on the Z11 is to use shielded coax inside the tuner instead of plain wire. Can anybody mail be the QST article about the Z11? 73! Martin |
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does the FT-817 have ARTS on VHF/UHF?
I have a Yaesu FT90R with A(auto) R(ranging)
T(transponder) S(system)...ARTS in it. Does the FT-817 have this system in it? I would use the FT-90R in one vehicle and the FT-817 in my other vehicle and always know if the other vehicle is within range and if the radio is turned on. Nice feature. Thanks and '73 Fred W5FAE __________________________________ Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month! |
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Re: Z-11 and Tokyo HiPower
Tim, N9PUZ
On Fri, 18 Jul 2003 08:20:08 -0400 (EDT), Charles.B.Wilber@...
wrote: Has anyone on the group used their FT-817 with a Z-11 autotuner andYes, that is where it would be placed. I have used this combination for over a year with great success. You need to have the amp in bypass mode when you tune so the Z-11 is not switching high power. If your match is not close and you forget my experience is that the SWR protection in the amp will shut it down anyway. I wouldn't depend on this for normal operation! Tim, N9PUZ |
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Re: LDG Z-11 vrs. RT-11 Tuner max. RF power
Cortland
I was testing at 60 watts and THAT is indeed too much, at least
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before matching has been achieved. I have one or more relays with bad contacts now. Cortland --- In FT817@..., "wb6mlc" <kac@i...> wrote:
Cortland, KA5S , already knows what happens when you exercise a |
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Re: LDG Z-11 vrs. RT-11 Tuner max. RF power
ka4nrf
I had e-mailed LDG about what mods it would take to use the Z-11
with a 100 watt rig, Dwayne's reply was bigger torroids and there would be a problem with RF getting into the CPU. ARRL.org has a copy of the article Dwayne originaly wrote for QST on the 1st tuner they made. Good article if you want to understand the operation of the tuner and see a schematic. Steve KA4NRF |
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Re: Z-11 and Tokyo HiPower
Based on the ongoing discusions I would wait this out for a bit - I
don't think its wise to just try it out ( I have and seem to have been lucky ). It indicates that with high SWR there is a chance of burning the relay contacts. I'm not sure what the larger toroid does to satisfy the tuners working at higher levels but I'm sure someone will have an answer. WB2HVX - Paul |
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Z-11 and Tokyo HiPower
Has anyone on the group used their FT-817 with a Z-11 autotuner and a Tokyo
HiPower amp? I have all the components but have not yet tried them with the amp. I assume the tuner would be installed between the amp and the antenna feedline but please chime in if that is incorrect. 73 de Charlie N1AOK |
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Re: LDG Z-11 vrs. RT-11 Tuner max. RF power
tino2275
Hi!
What parts did blow when KA5S Tuner failed? Sorry I did not mention, I was testing 100W on a 10m piece of wire on all bands between 10m to 40m. I did this only for about 2 minutes, but in this time nothing got hot. But the tuner was not able to autotune with more than about 20W, this may be caused by the 1.4 software, which makes problems with thwe SWR protection of the FT-897. I did not get the 1.5 upgrade which should fix this known problem. The capacitors and relays are identical, the board layout and dimensions is the same, too. The only difference I can find are the slighlty bigger cores and another software, because the control head is different. Does the 1/3 bigger cores make more than 3 times more power on CW? I do not want anybody to blow his tuner, just want to discuss it. |
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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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