开云体育

FT-847 power switch

Mitchel W2NEC All Messages By This Member #752 The power switch on my FT-847 is starting to have issues and while I am in the process of locating where to have it replaced, is it advisable to use the power supply to turn the rig on and off? Thanks in advance
gw3fsp All Messages By This Member #753 Hi Mitchel, personally I would not do that, might cause problems with the set and/or psu, I would suggest you fit a switch between the psu and the set in the positive feed lead. Leighton. GW3FSP.
M0CNL All Messages By This Member #754 From what I have heard this is a common problem. I have heard that shorting the switch contacts to the unused pair on the pcb will get around the issue. But proceed at your own risk. I am sure that a search on the switch problem will show many people advising the same and some with pictures showing how to do it. But as I say, I have not needed to do this and if you do so then you do it at your own risk toggle quoted message Show quoted text On Wed, Jun 21, 2023 at 1:09?AM gw3fsp via <gw3fsp.ldavies=[email protected]> wrote: Hi Mitchel, personally I would not do that, might cause problems with the set and/or psu, I would suggest you fit a switch between the psu and the set in the positive feed lead. Leighton.? ?GW3FSP.
Michael Luft All Messages By This Member #755 ??????? ??? ??, 21 ????? 2023 ?-3:06 ??? ?Mitchel W2NEC?? <?mitchelrought@...??>:? toggle quoted message Show quoted text The power switch on my FT-847 is starting to have issues and while I am in the process of locating where to have it replaced, is it advisable to use the power supply to turn the rig on and off? Thanks in advance
Andrew Lenton All Messages By This Member #756 开云体育 As you have to strip down the whole front panel, I would leave it in the on position if that is possible, I would only strip down, if I could find a replica part. ? 73 ? Andrew ? toggle quoted message Show quoted text From: [email protected] [mailto:[email protected]] On Behalf Of m1cxz m0cnl Sent: 21 June 2023 01:18 To: [email protected] Subject: Re: [YaesuFT847] FT-847 power switch ? From what I have heard this is a common problem. I have heard that shorting the switch contacts to the unused pair on the pcb will get around the issue. But proceed at your own risk. I am sure that a search on the switch problem will show many people advising the same and some with pictures showing how to do it. But as I say, I have not needed to do this and if you do so then you do it at your own risk ? On Wed, Jun 21, 2023 at 1:09?AM gw3fsp via <gw3fsp.ldavies=[email protected]> wrote: Hi Mitchel, personally I would not do that, might cause problems with the set and/or psu, I would suggest you fit a switch between the psu and the set in the positive feed lead. Leighton.? ?GW3FSP.
KD4OBQ All Messages By This Member #757 Mine was modified years ago when replacing the switch. Paralleled the contacts so both sets of contacts are used instead of just on side of the double pole switch. 73
Jorge Lopes All Messages By This Member #759 Hi all,? Sorry it's in Portuguese but it's good solution too: Maybe subtitles could help? 73,?
Frank All Messages By This Member #760 HI Years ago I had the same problem too. Sooner or later it happens to everyone, it depends on how you use the radio to know if "BEFORE" OR "AFTER"... ? The first time I shorted the contacts with the other position, then that one also blew and I replaced the switch completely with a new one which I found identical. ? It has held since then, but it will happen again...maybe... I always use the radio, now these days I notice another problem that gives me little VHF power... maybe the power amps or something else... I've been using it for years and years now... something had to happen... unfortunately. 73 Frank
Andrew Lenton All Messages By This Member #761 开云体育 There is a whole thread about low VHF power it may not be the output transistor ? KR ? Andrew ? toggle quoted message Show quoted text From: [email protected] [mailto:[email protected]] On Behalf Of Frank Sent: 21 June 2023 13:50 To: [email protected] Subject: Re: [YaesuFT847] FT-847 power switch ? HI Years ago I had the same problem too. Sooner or later it happens to everyone, it depends on how you use the radio to know if "BEFORE" OR "AFTER"... ? The first time I shorted the contacts with the other position, then that one also blew and I replaced the switch completely with a new one which I found identical. ? It has held since then, but it will happen again...maybe... I always use the radio, now these days I notice another problem that gives me little VHF power... maybe the power amps or something else... I've been using it for years and years now... something had to happen... unfortunately. 73 Frank
Andy Bosworth All Messages By This Member #762 I would suggest you do not just turn psu on, it will more than likely have a voltage surge on switch on. Disconnect positive from psu, turn on psu and then connect positive. I have plenty of switches in stock, that are on ebay, but ebay vastly inflates the price for shipping to abroad from UK.? Direct is considerably cheaper. toggle quoted message Show quoted text On Wed, 21 Jun 2023, 14:32 Andrew Lenton, <a@...> wrote: There is a whole thread about low VHF power it may not be the output transistor ? KR ? Andrew ? From: [email protected] [mailto:[email protected]] On Behalf Of Frank Sent: 21 June 2023 13:50 To: [email protected] Subject: Re: [YaesuFT847] FT-847 power switch ? HI Years ago I had the same problem too. Sooner or later it happens to everyone, it depends on how you use the radio to know if "BEFORE" OR "AFTER"... ? The first time I shorted the contacts with the other position, then that one also blew and I replaced the switch completely with a new one which I found identical. ? It has held since then, but it will happen again...maybe... I always use the radio, now these days I notice another problem that gives me little VHF power... maybe the power amps or something else... I've been using it for years and years now... something had to happen... unfortunately. 73 Frank
Richard AG5M All Messages By This Member #763 For what it's worth... I did what is shown in the video years ago, paralleling the contacts and adding a 0.01 uf cap. It's pretty easy as the front panel tips down. Never had a problem. And I do turn the radio on and off with the PS just to be cautious. Also, I bought some spare switches. I don't remember the source but it was either Digikey or Mouser. If you would like the P/N I can look for the spare package. But that could take a month as I am on travel. There should be a note in the files somewhere. 73, Richard AG5M On Wednesday, June 21, 2023 at 03:32:19 AM PDT, Jorge Lopes <ct1exr@...> wrote: Hi all,? Sorry it's in Portuguese but it's good solution too: Maybe subtitles could help? 73,?

Previous Topic Next Topic