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Re: Tx oscillation on 432 MHz
Mike Olbrisch
¿ªÔÆÌåÓýHow are you powering the FT-817?? If via the DC power jack, do you have the snap-on toroid that Yaesu supplied for this problem in the power line? ? Vy73 - Mike - KD5KC. El Paso, Texas - DM61rt. W5-SOTA Association Manager. NA-SOTA info: http://na-sota.org/ ? ? ? From: FT817@... [mailto:FT817@...]
Sent: Monday, November 28, 2016 04:40 To: FT817@... Subject: [FT817] Tx oscillation on 432 MHz ? I recently had the final stage of my 817 replaced/upgraded to a new final and I was told the board installed is the same as the ND final. ? All looks good on all bands, except that on occasions, the final appears to self oscillate when using 432 MHz, so that pressing PTT and not saying anything, the power output indicator goes full scale. ? ? I tested it on a dummy load and got the same behaviour except that I could not get the oscillation if it was set to use the rear antenna connector on that band. ? ? Is this a known fault with the 817? ?I searched the archives of the group without finding a direct mention of this problem. ? ? Thanks for any insights anyone can offer. ? ? Andrew VK1DA |
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Tx oscillation on 432 MHz
I recently had the final stage of my 817 replaced/upgraded to a new final and I was told the board installed is the same as the ND final. All looks good on all bands, except that on occasions, the final appears to self oscillate when using 432 MHz, so that pressing PTT and not saying anything, the power output indicator goes full scale. ? I tested it on a dummy load and got the same behaviour except that I could not get the oscillation if it was set to use the rear antenna connector on that band. ? Is this a known fault with the 817? ?I searched the archives of the group without finding a direct mention of this problem. ? Thanks for any insights anyone can offer. ? Andrew VK1DA |
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Re: Buddipole Pole Battery Packs
I have used my original Buddipole 4S2P pack and my newer A123 Systems 12V7 packs with various radios like an FT-857, an Elecraft KX3 with and without the 100W amp and with an Ellecraft KX2. These batteries easily power the radios at 100W and with the fairly low rx current of the FT-857 and extremely low rx current of the Elecraft's, I usually operate for a couple of hours at 100W from a single Buddipole 4S2P or 12V7 pack. So far with my local park outings I have not run any of the batteries to the point of low voltage cut off at 100W and can't imagine doing so at QRP levels.?
I have to use the charger supplied by Buddipole for their 4S2P pack and the 12V7 packs from A123 or NEC simply need at least 13.8 to maybe 14.5V to charge using a power supply or a cigarette lighter plug in a vehicle. The charging circuit and cell balancers built in the 12V7 packs make everything work and the initial charging current is about 10A and tapers off after about 45min of charging.? After many years of portable ops I've settled on a home made 100W version of the LNR/PAR multi band end fed. Its a 64:1 transformer feeding about 63ft of 22ga Teflon wire and I wind the wire and about 40ft of miniature parachute cord into a plastic chalk line reel.?This antenna has a great match and performance on 40, 20, 15 and 10m without a tuner. I also use about 30ft of RG-316 miniature Teflon coax and have a home made choke near the radio end consisting of about 5 turns of the coax through a large #31 ferrite bead.? This antenna goes up in a minute and greatly outperforms a Buddipole or anything similar. It basically has about the same performance as a 40m center fed dipole but its much easier to deploy and stow. You can make one for roughly $25 including ferrite core, box, chalk line reel, etc. The only variable is how cheap you can find the Teflon wire and you can use any wire thats the same OD or smaller and still fit it and the guy string inside the chalk line reel. BTW, when its all spooled out and ready to go up in a tree, the empty chalk line reel becomes the throw weight. Mike |
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Re: Buddipole Pole Battery Packs
Mike Olbrisch
¿ªÔÆÌåÓýHi Andrew.? I get about 3 hours out of 1 3S1P Buddi-pole pack.? It varies some, but never less than 2 hours and never more than 4 hours.? I typically run 5-watts, either SSB or CW.? My particular FT-817 averages about 800mah the way I operate.? I carry two, because after you hike 5 or more miles and climb 3,000 or more feet, the last thing you want is to learn your battery has failed. ? I have the Buddi-Pole charger, the Multi-something..... it charges ALL of my batteries, the thing is programmable and has about 25 different settings. ? I have several "favorite" antennas.? The best one is an 88 foot doublet.? It covers 80m-6m.? But it is a pain in the rear to set up.? I also like the multi-band EFHWA that I built.? It covers 40m-15m, the limiting factor is the tuner.? I had been considering trying to make it work on 12m too, but that is becoming less important as the sunspots go away.? ? The antenna I use most often is the Alex-Loop, it covers 40m through 10m and goes from backpack to CQ in under 5 minutes, and weighs under 3 pounds.? I have begun using the W4OP loop, which is 3 dB better on 40m than the Alex loop (6dB better than the alpha and chameleon loops), but it is heavier. ? I notice you replied through the reflector and direct..... and your reply came through the reflector..... but not my original reply.? This one is going out on 2016-11-28 @ 0343 UTC..... wonder if it will beat the first at 2016-11-28 @ 0207 UTC ? Vy73 -- Mike -- KD5KC. ? ? From: Andrew Bounds [mailto:abounds5@...]
Sent: Sunday, November 27, 2016 20:26 To: FT817@...; Mike Olbrisch Subject: Re: [FT817] Buddipole Pole Battery Packs ? Thank you very much for the quick response Mike. |
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Re: Buddipole Pole Battery Packs
Thank you very much for the quick response Mike. As follow up questions what power are you using when tx (5 watts or less)? Also are you using the buddipole charger and if so which one? And finally what antenna do you find you use the most for 40/20 meters? Oh, and how long should then battery last on a charge ...subjective. I ask because you have two. Thanks again! Andrew - KD5CQ On Sun, Nov 27, 2016 at 8:09 PM Mike Olbrisch <mike-2007@...> wrote:
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Re: Buddipole Pole Battery Packs
Mike Olbrisch
I have TWO of the 3S1P packs. In short - LOVE THEM!
I chose the 3S pack because it is almost a PERFECT match for the FT-817. Here is why. Fresh off the charger a single cell is about 3.65v. A 3S pack will be about 11 volts - the PERFECT running voltage for the FT-817 (anything above 11v is wasted in heating the internal regulators). The nominal operating voltage for a single cell is 3.2v. A 3S pack will run at 9.6v for a long time. The absolute minimum discharge voltage (according to one of the engineers at A-123) is 2.0v. It is recommended to stop using them somewhere around 2.5v for best life. That would put a 3S pack somewhere in the order of 6.0 to 7.5V. It just so happens that my FT-817 shuts down (I measured it) at 7.2v. So it is impossible to discharge the 3S pack below 2.0v per cell. Actually, for the FT-817 application, the A-123 engineer said the momentary excursion below 7.5v was likely too short to cause any damage at all. If you add the Wulfden power pole adapter to your FT-817, the Buddi-Pole batteries plug right in. I made a short Power-Pole extension cord, and as I operate with my FT-817 hung around my neck, I keep the battery in a pocket. I am sending this DIRECT and through the reflector on 2016-11-27 @ 0207 UTC ..... because sometimes the reflector has a very long delay on it. I have a digital copy of the A-123 discharge curve. I have attached it so you should see it direct, but the reflector will strip it out. Hope this helps. Vy73 - Mike - KD5KC. El Paso, Texas - DM61rt. W5-SOTA Association Manager. NA-SOTA info: From: FT817@... [mailto:FT817@...] Sent: Sunday, November 27, 2016 14:14 To: FT817@... Subject: [FT817] Buddipole Pole Battery Packs Has anyone used the buddipole battery packs with the FT817ND and, if so, which pack did you select and why? I'm looking at either the 3s1 or 4s1. Thanks Andrew - KD5CQ |
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Re: Buddipole Pole Battery Packs
I sold my FT-817 long before buying a Budipole battery but have had excellent service from my now very old 4S2P pack. I also bought the $79 charger from Buddipole to go with it.?
? If you are looking at the 4S2P pack I might suggest the NEC 12V7 pack instead. The reasons are Buddipole uses the fantastic A123 Systems 26650 cells in their packs. A123 Systems made their own version of a 4S2P pack that included a built in charging system, low voltage cutoff and a 30A fuse, packaged in the same size enclosure as the common 7AH gel cell. A123 Systems recently sold their smaller battery line to NEC Energy Systems who continues to make the 12V7 pack. Another reason to buy the NEC version over the Buddipole is Buddipole charges $165 for the 4S2P pack without low voltage protection and you need at least their $79 charger to make it work. The NEC 12V7 is the same cells, same capacity with more features, you can charge it from any 14V supply and it cost around $130.? I have several of the older A123 Systems 12V7 packs and they are the best, most trouble free, longest life portable batteries I've ever used. I commonly power 100W HF rigs on park benches for several hours of fun with just one 12V7 pack.? Mike |
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Re: Buddipole Pole Battery Packs
I haven't used Buddypole packs, if I remember correct are A123 litium tech?
3.3V nominal per cell so a 3s or 4s may be right (fully charged they are 3.65V). Lithium is not one tech and there are several major ones that are different. My preference is 18650 LIpo LG, Panasonic, or Sanyo cells. ?I build my own packs? withavailable battery protection?or charge management boards. ?For the 817 its always? a 3S (lipo is 4.2V full chage and 3.7V nominal)?and I have 3S2P and 3S4P packs for? used as needed. ?The 3S4P is an effective 5Ah and the 3S4P?is 11AH, in both cases? measured useful life with 817. ?The 18650 cell is more mechanically durable than? pouch cells at only a slight increase in weight. If I bring both packs that's enough? power for many days operating. The 3S2P or its larger brother is also good for the various HB radios I have including? the 6M?4W SSB, 6M 1W SSB, WM for 15, PSK20, 10M 4W SSB, 20M 4W SSB,? KNQ7A, and the kitsandparts 1W. Generally for portable work an amp is excess baggage, for stationary works like FD then? battery size is not an issue and I assemble kit for that as needed for the class of? operation for the group (QRP or 100W). ?For most of those remote but staionary ops weight is rarely a issue. If I need more power at HF-6M I use the Tentec Eagle, 12 pounds 100W with? antenna tuner?and a 4S4P 11ah pack for short duration or a 33-150AH AGM? battery as needed?(larger for FD). For the moment I'll not detail solar charging /maintaining but I have that too. Mobile its either FT817 or TS440/SAT. Allison/Kb1GMX |
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Re: Buddipole Pole Battery Packs
¿ªÔÆÌåÓý
-------Original Message-------
?
From: abounds5@... [FT817]
Date: 11/27/16 16:14:25
To: FT817@...
Subject: [FT817] Buddipole Pole Battery Packs ?
Has anyone used the buddipole battery packs with the FT817ND and, if so, which pack did you select and why? ?I'm looking at either the 3s1 or 4s1. Thanks? Andrew - KD5CQ ? |
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Re: Flashing Screen and no audio on FT-817ND
Hi, all:
Thanks for all the suggestions. Unfortunately, none of them have solved the problem. The PSU used is a good one (Alinco DM-330MV, and I've verified it's putting out the correct voltage and current with other devices). The unit is making a good battery connection, since it charges and discharges just fine. :-( I called Yaesu tech support on Friday, and they indicated that it was likely the reference oscillator that was failing. As one poster suggested, it may also be a PLL failing. Boxing it up and sending it in to Yaesu on Monday. I don't personally feel qualified to do the re-calibration myself. Hopefully that's all it is. So far, I've not had good luck with my FT-817. Hopefully with this fix that will change! Aaron / K7ALF |
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Re: Replacement Final Board a Cure For Original Problem
IMHO for Yaseu has not admitted it after years of the old final board failing due to low battery voltage, yes the newer PA board, that is over 6 years since the change to newer PA board, is better and does not have the oscillation issue on low power supply/battery voltage and PA going into oscillation and destroying itself.
My FT817 (non-ND) had the PA failure after being stored for 6 months with NiCads inside.? Pulled the rig out, batteries dead, powered with ext supply and no power output.? I ordered the newer replacement board and all has worked very well since.? But I do not put batteries in my 817, always use either ext battery or power supply.? And I disconnect all when not in use.? But I do think the newer PA board will not have the low voltage issue. Was very simple to replace the PA board, just a few solder connections and easy alignment. 73, ron, n9ee/r |
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Replacement Final Board a Cure For Original Problem
I recently forgot that i had rechargeable batteries in my older Ft817 (non-ND) and the final eventually failed .. probably due the the batteries discharging way too low. A new final amp board fixed it good as new. My question: is it thought that the replacement ft817 final amp module is more robust and less prone to the blown finals club plague? thanks in advance gary, ke8wo |
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Re: Black Friday
Hi all,
After HRO and other rig sellers Black Friday sales we figured that many hams would need a Kx33 Low-RFI power supply for all those FT-817s that will be bought so...we are going to offer Free Shipping to US hams starting today, Nov 25th and extending through the end of the month for all Pro Audio Engineering products. This includes the special deal we have going for the Yahoo FT817 Group which must be purchased through this page: We would love to extend this to all North American hams, but it is impractical given the ratio of product to shipping cost. Alternatively we will split the shipping cost to North American hams outside the US in this same time period. After your purchase we will refund you 50% of the shipping cost. Happy Thanksgiving all you US hams and a belated Canadian Thanksgiving and Mexican Revolution Day! Cheers & 73, Howie - WA4PSC www.proaudioeng.com |
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Re: Flashing Screen and no audio on FT-817ND
At 08:02 AM 11/24/2016, you wrote:
BTW, this is the same radio I posted about last year at approximately this time: it also occasionally gives a nasty 550 MHz tone after turning it on and moving any button or dial. One of my Elmers asked an electrical engineering friend to look at it, and it was he who discovered the Home button trick. That also stops the ugly tone and gets the radio working. The engineer couldn't see any obvious reason for this behaviour.This (and the OP's issue) sounds very much like the power supply doesn't have an adequate output current rating. Paul WA9PUL Paul Goelz Rochester Hills, MI pgoelz@... www.pgoelz.com |
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Re: Flashing Screen and no audio on FT-817ND
¿ªÔÆÌåÓýGood morning, Aaron et al: At last! Now I know I haven't gone mad! My FT817ND does the same thing, y'see. My radio was purchased from the estate of an acquaintance. It has a CW filter of some sort, and it has a WindCamp battery but no charger. Nor did it come with the original battery. :( I use mine without any internal battery, ever, and mine occasionally flashes with no audio when I turn it on. I press the Home button, and the flashing stops and audio comes back. No rhyme or reason for this behaviour, and no internal battery connection to go sideways. BTW, this is the same radio I posted about last year at approximately this time: it also occasionally gives a nasty 550 MHz tone after turning it on and moving any button or dial. One of my Elmers asked an electrical engineering friend to look at it, and it was he who discovered the Home button trick. That also stops the ugly tone and gets the radio working. The engineer couldn't see any obvious reason for this behaviour. I cannot suggest a cause, but at least there's a solution for both bad behaviours. Aaron, please let use know if you do find a cause for whatever's happening. 73 and happy Thanksgiving to those for whom it is The Day, Neil VA5SCA Sent with the assistance of Morse Code, slide rule, and abacus.
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Re: FT-817 Charging current and hour info?
Yes, that was the configuration I had when I discovered the unwanted sidebands. Maybe the charger is topping up the supplied voltage with ripple?
73, Roland SM0BRF Fr?n: FT817@... [mailto:FT817@...] Skickat: den 24 november 2016 00:40 Till: FT817@... ?mne: Re: SV: [FT817] Re: FT-817 Charging current and hour info? Hi Except if you have the internal battery then it will put out the 5 watts even with the small supplied charger. The small charger alone will not supply enough power for full power alone. Marty kd8bj On 11/23/2016 12:33 PM, 'Roland Nyman' roland.nyman@... [FT817] wrote:
[Non-text portions of this message have been removed] |