Nigel: The ATU is a 2 layer board. Just the top and bottom outer layers. No inner layers.
--- Graham == On Fri, Oct 19, 2012 at 2:36 PM, Nige G7CNF <g7cnf.n...@gmail.com> wrote: > My English teacher (a Greek chap named Mr Avrimedes) used to say, "Never > assume anything because you make an ASS out of yoU and ME." > > I made an assumption - and paid for it. The finals arrived from Icom today > and I set-to. Because I'm disabled I cannot hold a standing posture to work > on equipment so I did it on the kitchen table. Out came the ATU, out came > the RD70's which looked suspiciously healthy (although I'd like to know > what mig welder was used to "solder" them in, high temp solder, oh boy). In > went the new ones and then the reassembly. Only then did I see what I can > only describe was the cause of yet another bad day. . . . > > One of the relays on the ATU board was fried, along with the adjacent PCB. > Relay K7 is toast. > > How many layers does the ATU have? The damage is nearly through to the > rear of the PCB so I'm not holding my breath that I can fix this - or > anyone else for that matter. I have taken a photo but not attached it to > this post as I don't know if it would be sent to everyone and not everyone > wants their bandwidth used up on graphics. > > Cheers, from one rather despondent Nigel. > > > > > On 18/10/2012 18:27, Bill Ockert - ND0B wrote: > >> Maybe I am just unlucky but I have blown mine twice. First time I blamed >> myself as I had an extended JT65 session >> over several bands at full power. JT65 is about 40% duty cycle with 48 >> seconds out of each two minute period as >> key down time. The SWR was very low on all bands (autotuned with and >> AT-Auto) so while I do not >> believe this type of operation should have ben an issue but I did take >> the precaution of having DDUtil cut the power >> back to 50% any time I go into a digital mode. >> >> The second time, about six months later they failed sometime between the >> end of a 160m rag chew session at 22W AM >> driving my ACOM amp and an attempted 6m USB session, there was a two day >> span where the radio was >> powered but not in use. I believe it failed while sitting there so I >> have not come up with a good explanation for >> the second failure. >> >> Both times I shipped it back to Flex and between shipping and repair >> this "feature" has cost me close to >> $600. I plan to stock the finals from here on out to avoid most of the >> cost and the downtime should this happen >> again. >> >> 73 de Bill ND0B >> >> -----Original Message----- From: Rich >> Sent: Wednesday, October 17, 2012 12:06 PM >> To: flexradio@flex-radio.biz >> Subject: Re: [Flexradio] Blown finals >> >> that's so strange ,that you should have blown finales,, have done a lot >> with Flex's >> and have never heard of a blown finale . >> but whatever the case ,, hope all goes well >> "Rich" >> >> >> >> >> On 10/17/2012 10:18 AM, Nige G7CNF wrote: >> >>> To any UK Flexer who might find themself in the same position, courtesy >>> of N1DL the F5K's finals are also used in the Icom IC-7000. The RD70HHF1's >>> were in stock @ £44ea. That's about middle of the road from the prices I >>> obtained but the only supplier to have them in stock. >>> >>> Nige. >>> >>> On 17/10/2012 14:42, Karl Geng wrote: >>> >>>> Just remembered the ICOM IC7000 uses the same MOSFETS in the final >>>> try the UK ICOM guy. >>>> >>>> Karl N1DL >>>> >>>> >>>> On Oct 17, 2012, at 8:46 AM, Nige G7CNF <g7cnf.n...@gmail.com> wrote: >>>> >>>> Cheers. Managed to confirm that. Now the trouble is I can't find any >>>>> in the UK - any help appreciated. >>>>> >>>>> Nige. >>>>> >>>>> On 17/10/2012 12:57, dan edwards wrote: >>>>> >>>>>> pair of rd70hhf's in push-pull, i THINK....73, w5xz >>>>>> >>>>>> >>>>>> --- On *Wed, 10/17/12, Nige G7CNF /<g7cnf.n...@gmail.com>/* wrote: >>>>>> >>>>>> >>>>>> From: Nige G7CNF <g7cnf.n...@gmail.com> >>>>>> Subject: [Flexradio] Blown finals >>>>>> To: flexradio@flex-radio.biz >>>>>> Date: Wednesday, October 17, 2012, 11:54 AM >>>>>> >>>>>> Hi guys. >>>>>> >>>>>> Following an unexpected high SWR condition on 10m (@80w full >>>>>> carrier), the PA failed to fold back for some reason and smoked >>>>>> them. To save me the bother of opening the box prematurely, could >>>>>> someone tell me which MOSFETs are used, please? >>>>>> >>>>>> Regards, >>>>>> >>>>>> Nige. >>>>>> >>>>>> ______________________________**_________________ >>>>>> FlexRadio Systems Mailing List >>>>>> FlexRadio@flex-radio.biz </mc/compose?to=FlexRadio@** >>>>>> flex-radio.biz <FlexRadio@flex-radio.biz>> >>>>>> http://mail.flex-radio.biz/**mailman/listinfo/flexradio_** >>>>>> flex-radio.biz<http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz> >>>>>> Archives: http://www.mail-archive.com/** >>>>>> flexradio%40flex-radio.biz/<http://www.mail-archive.com/flexradio%40flex-radio.biz/> >>>>>> Knowledge Base: http://kc.flexradio.com/ Homepage: >>>>>> http://www.flexradio.com/ >>>>>> >>>>>> ______________________________**_________________ >>>>> FlexRadio Systems Mailing List >>>>> FlexRadio@flex-radio.biz >>>>> http://mail.flex-radio.biz/**mailman/listinfo/flexradio_** >>>>> flex-radio.biz<http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz> >>>>> Archives: >>>>> http://www.mail-archive.com/**flexradio%40flex-radio.biz/<http://www.mail-archive.com/flexradio%40flex-radio.biz/> >>>>> Knowledge Base: http://kc.flexradio.com/ Homepage: >>>>> http://www.flexradio.com/ >>>>> >>>> >>> >>> ______________________________**_________________ >>> FlexRadio Systems Mailing List >>> FlexRadio@flex-radio.biz >>> http://mail.flex-radio.biz/**mailman/listinfo/flexradio_**flex-radio.biz<http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz> >>> Archives: >>> http://www.mail-archive.com/**flexradio%40flex-radio.biz/<http://www.mail-archive.com/flexradio%40flex-radio.biz/> >>> Knowledge Base: http://kc.flexradio.com/ Homepage: >>> http://www.flexradio.com/ >>> >>> >> ______________________________**_________________ >> FlexRadio Systems Mailing List >> FlexRadio@flex-radio.biz >> http://mail.flex-radio.biz/**mailman/listinfo/flexradio_**flex-radio.biz<http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz> >> Archives: >> http://www.mail-archive.com/**flexradio%40flex-radio.biz/<http://www.mail-archive.com/flexradio%40flex-radio.biz/> >> Knowledge Base: http://kc.flexradio.com/ Homepage: >> http://www.flexradio.com/ >> >> >> >> ----- >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2012.0.2221 / Virus Database: 2441/5337 - Release Date: 10/17/12 >> >> >> ______________________________**_________________ >> FlexRadio Systems Mailing List >> FlexRadio@flex-radio.biz >> http://mail.flex-radio.biz/**mailman/listinfo/flexradio_**flex-radio.biz<http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz> >> Archives: >> http://www.mail-archive.com/**flexradio%40flex-radio.biz/<http://www.mail-archive.com/flexradio%40flex-radio.biz/> >> Knowledge Base: http://kc.flexradio.com/ Homepage: >> http://www.flexradio.com/ >> > > > ______________________________**_________________ > FlexRadio Systems Mailing List > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/**mailman/listinfo/flexradio_**flex-radio.biz<http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz> > Archives: > http://www.mail-archive.com/**flexradio%40flex-radio.biz/<http://www.mail-archive.com/flexradio%40flex-radio.biz/> > Knowledge Base: http://kc.flexradio.com/ Homepage: > http://www.flexradio.com/ > _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
