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Re: Post mod problem
r_f_manning
The Green LED is lit. IU'm not transmitting either. Apparently I
touched the cable with the soldering iron. I'm in the process of shortening the cable. I'll try that until I can get one from Yaesu. Bob N7AW --- In FT817@..., "grajohnt" <grajohnt@y...> wrote: Is the green LED lit while trying to receive on 2m?wrote: I have no audio on 2 M. No transmit for that matter. I justfinishedthe all band mod. Any ideas? |
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Re: Power shuts off during transmit??
Sounds like a low voltage during transmit problem. A 3 watt power supply will
charge the batteries, if it puts out 13.8 volts, and the radio is OFF during charge, but will not supply adequate AMPERAGE to power the transmitter at 5 watts power. (or perhaps your power supply is 3 AMPERES. or 40--45 watts ?) --If the latter is true, perhaps you have a defective power CONNECTION, or something is wrong with the power supply. If all is OK, your FT-817 frnt panel should show a voltage between 12.5 and 15.0 volts when you connect the power supply and turn on the radio. Voltages outside this window indicate a problem, and the voltage should REMAIN above 12.0 volts DURING transmit, when using your power supply, if everything is normal. Regardless of where the power comes from, if the voltage EVER drops below 8.0 volts, the radio is likely to malfunction, or turn off, and this is normal.-73, KC3VO |
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My blown finals
Randy
My rig died a couple of weeks ago. It was one of the early Dec 2000 rigs.
I had batteries in the radio. I had it connected into my new Tokyo HiPower amp. I pluged in the external power cable to my big 62 AH gell cell battery. Pressed PTT and about 2-3 watts came out of the amp. Just about nothing from the radio. It worked fine the day before this happen, No mods, no 10 watts. Direct keying from radio to amp. Sent to Yaeus on a Monday morning, received phone call Friday afternoon fixed. $47 for the final module, $75 for one hour labor. I asked, and received, the removed failed module. On the paperwork it mention changing the module, testing, and tweaking, to factory specs. And they did some mods involving changes, or removal, of a couple of resistors and caps. Something to do with protection. No other details given. Randy WA2AGE |
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Re: Post mod problem
Is the green LED lit while trying to receive on 2m?
You may want to try re-seating the ribbon connector regardless. -JohnT (KB5HWS) --- In FT817@..., "r_f_manning" <r_f_manning@y...> wrote: I have no audio on 2 M. No transmit for that matter. I justfinished the all band mod. Any ideas? |
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Re: Anyone Besides Yaesu Replace Finals?
Mike Richter
Because the user could have contributed to the problem as well
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- overheated it by operating in an enclosed case - applied overvoltage - change the calibration settings to disable SWR-protection, disable overcurrent-protection, increased power output to 15 watts etc etc Despite this possibility of "user-error", Yaesu still seems to be fixing blown finals for free. Mike VK2BMM --- In FT817@..., "Dave Campbell" <wcampbell@o...> wrote:
If Yaesu is aware it's an obvious problem. Why would |
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Re: Anyone Besides Yaesu Replace Finals?
George
Yes...What he said
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Geo W7LFD |-----Original Message-----
|From: Dave Campbell [mailto:wcampbell@...] |Sent: Friday, July 11, 2003 11:19 PM |To: FT817@... |Subject: Re: [FT817] Re: Anyone Besides Yaesu Replace Finals? | | |If Yaesu is aware it's an obvious problem. Why would |they not fix them for free for anyone with a radio made |before a determined date or lot number or ser. number, |whatever? To bad it's not a safety issue, then they |would be recalled like cars! | |Dave |VE3ZZY | |----- Original Message ----- |From: "Larry Johnson" <larryj@...> |To: <FT817@...> |Sent: Friday, July 11, 2003 9:06 AM |Subject: Re: [FT817] Re: Anyone Besides Yaesu Replace Finals? | | |> That $300+ repair really sucks, considering many of us got the radio |> brand new at Dayton for $499.99. |> |> |> |> PERRY wrote: |> > |> > --- In FT817@..., "aa8gk" <aa8gk@y...> wrote: |> > > Thanks, Mike! The e-mail I got from Yaesu was steering me away from |> > > doing it myself. I will check out that file. Thanks for your help! |> > > |> > > 72! |> > > Pete, AA8GK |> > > |> > > |> > > |> > > --- In FT817@..., "Mike Richter" <m.richter@b...> wrote: |> > > > Replacing FT817 finals is pretty easy - screwdriver, soldering- |> > > iron, |> > > > multimeter. In the FILES section, have a look in |> > > the "Technicalities |> > > > and Repairs" and "Repairs" folders for detailed instructions. |> > > > |> > > > You only need to buy the Final Unit. |> > > > |> > > > People have replaced just the Final FETs, but it is much more |> > > > difficult and not much cheaper. The only alignment required in |> > > either |> > > > case, is to set the Idle Current. |> > > > |> > > > Mike VK2BMM |> > > > |> > > > |> > > > --- In FT817@..., "aa8gk" <aa8gk@y...> wrote: |> > > > > Well, for as much as I spent on the 817, I got only ONE CW QSO |> > > out |> > > > of |> > > > > it! I'm mad as a hornet. And, no, I've made NO mods or |> > otherwise |> > > > > abused the rig. So, I e-mailed Yaesu asking for a quote on |> > > repairs. |> > > > > Here's what they're sticking: |> > > > > |> > > > > P/N CB1152001 PA UNIT $266.97 EACH, IN-STOCK |> > > > > P/N CB1333001 FINAL UNIT 43.88 EACH, IN STOCK |> > > > > And, this isn't including the labor! |> > > > > |> > > > > Does anyone know of any reputable place that can do the job? |> > > > > |> > > > > 72 N QRT, DE AA8GK |> > > > > |> > > > > P.S., I may have a great little portable MF-UHF Yaesu receiver |> > > for |> > > > > sale here soon! |> > |> > HI Pete |> > |> > I replaced my transistors last year wasn't too bad..then I found out |> > the $43 bd was avalible..that would be a piece of cake...I would get |> > the cb1333oo1 final unit and do it your self..I think its three |> > solder connections and two screws..73 Perry |> > |> > |> > 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 | |> |> |> 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 |> |> |> |> | | | |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 | | |
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Re: Anyone Besides Yaesu Replace Finals?
Dave Campbell
If Yaesu is aware it's an obvious problem. Why would
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they not fix them for free for anyone with a radio made before a determined date or lot number or ser. number, whatever? To bad it's not a safety issue, then they would be recalled like cars! Dave VE3ZZY ----- Original Message -----
From: "Larry Johnson" <larryj@...> To: <FT817@...> Sent: Friday, July 11, 2003 9:06 AM Subject: Re: [FT817] Re: Anyone Besides Yaesu Replace Finals? That $300+ repair really sucks, considering many of us got the radioQuestions ) see Some really good technical info at: anywhere on the Internet or in print without notice or compensation.Please note that your messages and files sent to this group may appear
Questions ) see Some really good technical info at: Please note that your messages and files sent to this group may appearanywhere on the Internet or in print without notice or compensation.
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Re: Anyone Besides Yaesu Replace Finals?
John McClain
Very interesting! We went through a long drawn out
thread here on the list a while back that was exactly about what you experienced. As I recall, several people complained that their 817's finals died after the radio had been stored away with the batteries still installed. Some felt that the rig was keying up and transmitting while in the box when the voltage dropped to the point where the microprocessor got confused and keyed up the rig. Others felt that the finals started conducting when their bias voltage dropped. I guess either one could cook your finals. John K7SVV --- aa8gk <aa8gk@...> wrote: Sadly, because stoopid here hasn't used the rig ===== John K7SVV __________________________________ Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month! |
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Re: Anyone Besides Yaesu Replace Finals?
richy
Hi all
My 817 stopped txing a few weeks ago. I took it back to walters & stantons The warranty is a 2 year as standard. I put it in for repair 26/6/03 and collected it today (15 days). I would have prefered it if the finals had not gone but am very pleased with the no quibbles repair, am hopeful these final will stay the pace. I don't know what caused the problem it has been on the lowest power setting connected to a ringo and used for packet for the last 8 or 9 months, the battery was disconnected. It was working at 5:30 am but not at 7am. The repair sheet just said finals replaced. Have Fun Dick m0clz --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (). Version: 6.0.500 / Virus Database: 298 - Release Date: 7/10/03 |
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Re: Anyone Besides Yaesu Replace Finals?
aa8gk
BELIEVE ME, no one babys his rigs like I do! I've been hamming for 20
years and never blew a final on anything! In fact, I was a bit skeptical about all of these blown final claims. But, there does appear to be a problem. With any luck, your rig was manufactured after the last of the defective (?) finals were used up at the Yaesu factory. Sounds like after everything you've put your rig through, you're gonna be okay! 72 Pete --- In FT817@..., "n9hmg" <n9hmg@y...> wrote: I'm curious about all these final failures. How are you guys usingBANGED around a lot, and I frequently fail to switch to the rear connectorit, switch the meter to power, and check to see if I still have anypower. I must be living a charmed life, because after probably 10instances of unterminated transmission, in FM, and a couple of those not atto them, as if mine goes, I'll be QRT until (and it appears, unless) I |
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[allowed] Re: Anyone Besides Yaesu Replace Finals?
aa8gk
--- In FT817@..., "Didier Juges" <didier@c...> wrote:
The absence of failure on already repaired units would givecredence to the Well, Didier, I hope you're right. Hopefully, I'll catch you on the bands soon! Pete, AA8GK bad batch theory. Let's hope that's the case.to 450 MHz, so their job is somewhat easier.defect in at least some of these radios.of course) by having the antenna on the wrong connector.OK, so a momentary operation into infinite VSWR is not always sufficient toblow these finals.receiver. I am having a lot of fun with it. Right now, I use it mostly on 6m,it is hooked up to a 4 element beam at 50' through 150 feet of RG-213,and when the band is open, I have no problem making contacts. I have used iton HF also with my R7. While it is not to be confused with a pile-upbuster, I have made some nice contacts, considering the declining sun spotcycle. last warranty -year. The darn thing sat in a box. I should know better: my darnif it makes it past that date, you should be okay. Even so, how closemany CBs are there out there that have been pumping 5 watts (or tech atto it) into poorly matched antennas for years? I spoke with a guessYaesu yesterday who was very nice and said he had no idea why they the good news is, he said that once the burned out finals were |
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FT817-ER - modifications for an HF Emergency Communications radio
Mike Richter
FT817-ER
For years I wanted to build an Emergency Radio for maximum communications capability on HF, when there is no other power source (e.g. Remote Area or a major disaster). Everything must be in the one box, except the antenna tuner and antenna. Below is a list of the design features, the reason for the feature and how I will implement it. The standard FT817 comes pretty close, but I got sick of waiting for Yaesu to release FT817 Mk2 - so I have started to rebuild my FT817. Some photos are posted in the Files Section under Mods of the FT-817 group (note the dash)- not this group, as the Files Section does not have enough room. Mike VK2BMM ================================================================= The format I've used is Feature - reason * solution Receive DSP ¨C improve comprehension, reduce listener stress * use SGC ADSP2 Receive Audio Level Compression ¨C improve comprehension, reduce listener stress * use SSM2165 (as in OneBigPunch) Antenna Tuner Control & Indication ¨C Tuner should be separate, at the aerial * Switches for Z11 Autotune and Manual, High and Low SWR LEDs Fan-cooled and big Heatsink - design to operate continuously at 45'C temperatures, with speech compressor or digital modes * Temperature-controlled two speed fan, PLUS effective convection cooling when fan not running Internal Batteries - 6Ahr, Lithium for no self-discharge * 12x1.5Ahr LiIon cells giving 12.6 to 9.0 volt during discharge, use ex-laptop battery electronics Multiple Microphone capability ¨C Microphone cord and plug are always weak points, Mic is easily forgotten or lost, Headset capable * Internal Electret Mic and PTT switch as found on every handheld * Inputs for Dynamic and Electret mics using several different plug types Transmit Speech Compression ¨C maximum talk power from a QRP transmitter * use SSM 2165 as in OneBigPunch Transmit Speech Frequency Filtering ¨C maximum talk power from a QRP transmitter * high pass filters to remove low frequencies which use power but do not contribute to intelligibility, CW Reader - communicate when propagation is poor, slow CW-ops can read fast CW * Use MFJ CW Reader ¨C small, light, low-power, automatic CW Paddle built-in ¨C in case Paddle/Key is lost, forgotten or faulty * two microswitches Front facing Speaker ¨C will work when inside a carry-case, better intelligibility * Extend case below existing front panel Lightweight as possible ¨C there's always other things to carry ¨C food, water * LiIon battery, Composite chassis (double-sided circuit board), fancooled, aluminium covers Reduce Receive current ¨C allow longer receive and standby operation * use switching regulators to replace 5volt and 6volt linear regulators Ease of use ¨C existing buttons are poorly placed * provide larger buttons on new panel, duplicating important existing buttons ¨C FreqUp, FreqDown, Fast, V/M. Fn Auto-repeat of CQ or position Report - hands-off operation * 30-second voice-recorder chip. ------------------------------------------------------------- |
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Re: Anyone Besides Yaesu Replace Finals?
Cortland
Mine blew about three days after the anniversary -- grin.
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There's been a lot of speculation why the 817 PA's go, and I cling to mine; those power FET's were new technolgy, and the reliability wasn't all that it could be. Nowadays, I see, they use a different part. Failure analysis is a well-paid engineering specialty, at firms who need to do it. Cortland --- In FT817@..., "aa8gk" <aa8gk@y...> wrote:
Yaesu yesterday who was very nice and said he had no idea why they |
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Re: Anyone Besides Yaesu Replace Finals?
Cortland
That $300 is for replacing the entire PA assemby -- basically, the
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back half of the radio, switched harmonic filters and all. I made the mistake of asking the Vertex-Stndard folks for the amplier price and was also shocked, but it's not as if I'd asked for a light bulb. Forty dollars for the PA transistor board is, by the way, a reasonable price, and kudos to the designers for making that repair possible; the FET package isn't meant to be resoldered with a pencil- type soldering iron. By the way, price your car in terms of replacing it part by part, some time. You could make a living buying cars retail, dissambling them, and selling the pieces. (You make MORE if you just steal them and run 'em through a clandestine chop shop -- a common practice.) Cheers, Cortland --- In FT817@..., Larry Johnson <larryj@t...> wrote:
That $300+ repair really sucks, considering many of us got the radio |
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Re: [allowed] Re: Anyone Besides Yaesu Replace Finals?
Didier Juges
The absence of failure on already repaired units would give credence to the
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bad batch theory. Let's hope that's the case. Regarding the CB finals, they do not have to pump these 5W from 1.8 to 450 MHz, so their job is somewhat easier. However, that's no excuse for Yaesu. It seems there is a latent defect in at least some of these radios. I have operated mine in open circuit more than once (accidentally of course) by having the antenna on the wrong connector. knock-knock (this is me knocking on wood :-), my finals are still OK, so a momentary operation into infinite VSWR is not always sufficient to blow these finals. Hope you fix the rig, because it is a nice little rig with a great receiver. I am having a lot of fun with it. Right now, I use it mostly on 6m, it is hooked up to a 4 element beam at 50' through 150 feet of RG-213, and when the band is open, I have no problem making contacts. I have used it on HF also with my R7. While it is not to be confused with a pile-up buster, I have made some nice contacts, considering the declining sun spot cycle. 73, Didier/KO4BB ----- Original Message -----
From: "aa8gk" <aa8gk@...> To: <FT817@...> Sent: Friday, July 11, 2003 8:12 AM Subject: [allowed] [FT817] Re: Anyone Besides Yaesu Replace Finals? Sadly, because stoopid here hasn't used the rig since I got it last |
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Re: Anyone Besides Yaesu Replace Finals?
I'm curious about all these final failures. How are you guys using
the rigs? Are you using those "toys" like the "One Big Punch" or something? But then again, if that were a problem, I'd expect them to go up in smoke with every digital transmission. Because my 817 is my only rig, it gets moved around a lot, and BANGED around a lot, and I frequently fail to switch to the rear connector when I go mobile, until a couple calls, then sheepishly go switch it, switch the meter to power, and check to see if I still have any power. I must be living a charmed life, because after probably 10 instances of unterminated transmission, in FM, and a couple of those not at 500mw, mine's still going strong. I just keep hearing about all these problems, and mine remains ever faithful. At the least, I want to avoid whatever people are doing to them, as if mine goes, I'll be QRT until (and it appears, unless) I get another job. |
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Re: Anyone Besides Yaesu Replace Finals?
Veenstra, Lester
I have some of the new transistors ( BTW Infinite VSWR protected), the RD07MVS1, and am in the process of getting ready to replace the old one's on a failed board (CB1333001 FINAL UNIT 43.88 EACH) that I have.
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Les K1YCM/3 -----Original Message-----
From: Mike Richter [mailto:m.richter@...] Sent: Friday, July 11, 2003 6:24 AM To: FT817@... Subject: [FT817] Re: Anyone Besides Yaesu Replace Finals? Replacing FT817 finals is pretty easy - screwdriver, soldering-iron, multimeter. In the FILES section, have a look in the "Technicalities and Repairs" and "Repairs" folders for detailed instructions. You only need to buy the Final Unit. People have replaced just the Final FETs, but it is much more difficult and not much cheaper. The only alignment required in either case, is to set the Idle Current. Mike VK2BMM --- In FT817@..., "aa8gk" <aa8gk@y...> wrote: Well, for as much as I spent on the 817, I got only ONE CW QSO outof it! I'm mad as a hornet. And, no, I've made NO mods or otherwise 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 |
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Re: Anyone Besides Yaesu Replace Finals?
cleskie
Just a suggestion, but I wonder if you explain tthe situation about
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the rig sitting in the box for a year, maybe they will honor the warranty even though the rig is out of warranty. I've heard of it happening before. They should be able to tell the rig has little use on it. Chuck KG8ZH ____________________________________________ --- In FT817@..., "aa8gk" <aa8gk@y...> wrote:
Sadly, because stoopid here hasn't used the rig since I got it last |
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Re: Anyone Besides Yaesu Replace Finals?
aa8gk
Good point, Bob! Yeah, who the heck wants to go through this misery
more than once!? --- In FT817@..., kc3vo@a... wrote: There are a few things to test before and after replacing thefinals. This testing should be done to determine if the finals, or an earlierstage, are at fault, and to ascertain the correct bias and drive levels of thenew finals, as well as determining that all is ok with the rest of the radio,so that the parts replaced will enjoy a LONGER life.--Yes, you can just replacethe final board without checking anything, and if you are lucky, it willwork, but why not try to reduce chances that you will replace the wrong thing, orthat the problem will recur?-----73, KC3VO--Bob. |
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