Internal battery FT-817ND
I have a roughly 6 year old Windcamp battery,?
?
All has been fine with it until this week when it literally expanded like a balloon.? The physical structure is not swollen, but the plastic cover is 'puffed up' like a balloon and can be pressed back into shape. I assume something within is emitting a gas and I have removed it from service for disposal.
?
This leads me to ask what is now available for internal fitting on the FT817? (preferably to the UK area).
?
Thanks, Andy? GD1MIP
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Re: Home Power Supply for Yaseu Ft 818nd
Any 11V to 15V 2A PSU is fine, even SMPSU if low RF noise. A "rig" 13.8 V supply can be used but wasteful compared to 12 V. I've used decent 12V 2 A SMPUs from scrapped router/modems that made no difference to LW/MW/ HF RX noise level,
Recently I changed to using a Yaesu E-DC-5B (I was given with a VX5R) that plugs into the Cigar lighter socket on my K-PO SPS-250 II. It's an RF quiet SMPSU I bought for my FTdx10 from Classic Radio International in Netherlands with the rig as they are much cheaper than UK or Irish dealers. I bought my FT817ND there too in 2006 and though in real terms value has fallen, the euro S/H price in Ireland for the FT817ND is more than what I paid in 2006.
I also use a 12V 9 AH gel cell (also used with my Pi via a 5V adaptor, but a few deep discharges destroy those). I replaced the internal 1800 mAH with 2500+ mAH NiMH (I found the 2700 models have a high self discharge), which might need charged twice on the timer. I also have a small solar panel only good for charging (folds and opens to about A4/Letter size) in direct sunlight. But even my home solar panels (more than rated 430W in suitable sunlight) only give 10 W each on a rainy day in October.
A PC SMPSU isn't a good idea as those need loaded on +5V and/or +3.3V or the +12V rail is only about 9.5V. Many are also lacking in RF filtering. I have used a car headlamp bulb once on 5V rail to use a PC SMPSU on 12V, but even for a CB it was poor. I also tried the recommended power increase circuit for an LM317 with two external transistors for a 13.8 V @ 15 A linear PSU but layout and decoupling is tricky to avoid a lot of RF or instability generally. It powers a couple of CBs, but doesn't manage more than 10A. However even the higher power version of the LM317 suitable for a linear PSU only works with careful layout and choice of capacitors. PCB or parts direct on legs of IC on heatsink as earth is recommended.a
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Re: Home Power Supply for Yaseu Ft 818nd
Hi Tony,
based on the consideration that power supply units for medical devices must fulfil stricter requirements with regard to interference radiation, I have purchased a power supply unit for medical applications for my FT-818ND. The 'AC/DC Medical Adaptor GSM36E12-P1J' from Meanwell supplies 12V DC voltage at max. 3A. The transceiver copes well with this. So far I have no cause for complaint. It is significantly cheaper than the certainly optimal ProAudio solution, which I can at best only buy in other European countries.
73
? ?Willi, DK6DT
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Re: Home Power Supply for Yaseu Ft 818nd
Yes. I believe the voltage measure adjustment is menu item 17 in the service menu. ?But, it’s a measure that can and does go out of calibration, and should be treated as guidance rather than a calibrated indicator.?
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Re: Home Power Supply for Yaseu Ft 818nd
Hi, I suggest you read this topic, and use a power cable with adequate section.
?
?
Regards, IZ1FHC
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Re: Home Power Supply for Yaseu Ft 818nd
That can be adjusted in one of the service menus. ? 73….Eric VK2VE. ?
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Show quoted text
From: [email protected] <[email protected]> On Behalf Of James Todd
Sent: Saturday, 5 October 2024 09:35
To: [email protected]
Subject: Re: [ft817] Home Power Supply for Yaseu Ft 818nd? I would not trust the display on the radio. I would trust a calibrated power supply or meter. ?Mine is not that accurate, off by at least 1.5 volts.?
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Re: Home Power Supply for Yaseu Ft 818nd
Hi Al, ? If that’s the case, then the 1V drop is quite acceptable as it is also reflecting the voltage drop in the cable from the power supply, especially if it’s a fairly thin one, as they often are. ? I think you’ll find that you will also see a voltage drop on the radio’s meter when transmitting on internal battery, as well. ? 73….Eric VK2VE. ?
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Show quoted text
From: [email protected] <[email protected]> On Behalf Of Al WB9UVJ
Sent: Saturday, 5 October 2024 08:59
To: [email protected]
Subject: Re: [ft817] Home Power Supply for Yaseu Ft 818nd? Michael, I was reading that on the voltage display of the radio.? That is the one that counts after all.
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Re: Home Power Supply for Yaseu Ft 818nd
It also depends on where he’s measuring it. ? If being measured at the power supply’s output terminals, then it is probably too much drop, however, if it’s being measured on the FT817’s internal voltmeter, then a 1V drop is quite possible, especially if the lead from the power supply to the radio is quite thin. ? Whichever the case, 11V is more than adequate to give full output in the radio as it will give full output down to at least about 9.5V. ? ?
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Show quoted text
From: [email protected] <[email protected]> On Behalf Of Ken N2VIP
Sent: Saturday, 5 October 2024 08:59
To: [email protected]
Subject: Re: [ft817] Home Power Supply for Yaseu Ft 818nd? I think he might notice a 1 volt drop on a 12v power source, even on an analog meter. An 11v power source is perfectly acceptable for an FT-817, but it's not an 11v supply - it should hold the voltage better under an amp or two draw in my opinion. ?
On Oct 4, 2024, at 17:48, Michael Davis via groups.io <maddmd818@...> wrote:
? They all drop a bit. You must be reading a digital volt meter. If it was analog, you'd never notice.? ? On Oct 4, 2024 1:33 PM, Al WB9UVJ <markaren1@...> wrote: Well I received the power supply I linked above and it is quiet it seems.? However during transmit the 12 volts drops almost a volt.? While it seems nice, I am going to return it to Amazon.? My suspicion is the voltage drop will be more pronounced when the supply heats up.
?
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Re: Home Power Supply for Yaseu Ft 818nd
I would not trust the display on the radio. I would trust a calibrated power supply or meter. ?Mine is not that accurate, off by at least 1.5 volts.?
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Re: Home Power Supply for Yaseu Ft 818nd
Ok. Let us know if another ps does the same. I'm running battery, but never noticed. Thanks 73
Mike WA1MAD
On Oct 4, 2024 6:59 PM, Al WB9UVJ <markaren1@...> wrote: Michael, I was reading that on the voltage display of the radio.? That is the one that counts after all.
--
Al Skierkiewicz
WB9UVJ
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Re: Home Power Supply for Yaseu Ft 818nd
Michael, I was reading that on the voltage display of the radio.? That is the one that counts after all.
--
Al Skierkiewicz
WB9UVJ
|
Re: Home Power Supply for Yaseu Ft 818nd
I think he might notice a 1 volt drop on a 12v power source, even on an analog meter.
An 11v power source is perfectly acceptable for an FT-817, but it's not an 11v supply - it should hold the voltage better under an amp or two draw in my opinion.
toggle quoted message
Show quoted text
On Oct 4, 2024, at 17:48, Michael Davis via groups.io <maddmd818@...> wrote:
? They all drop a bit. You must be reading a digital volt meter. If it was analog, you'd never notice.?
Mike WA1MAD
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Re: Feb QST article A Portable Twin-Lead 20m Dipole
I don't believe the group should store copyright-protected content - as I recall, the league is very good about pointing that out when you download an article...
QST articles are not in the public domain, as far as I know.
If the author wants to give you/us a shareable copy of an article they wrote, I believe they have that right...
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Show quoted text
On Oct 4, 2024, at 16:52, D Jones via groups.io <Djoneses@...> wrote:
?Greg:
I sent you a pdf of the article.? I also sent it to the group. On Fri, Oct 4, 2024 at 3:50 PM, Mike Dinolfo <mdinolfo@...> wrote:
Greg:
Unfortunately, ARRL's offering of archival issues of QST can be
somewhat difficult to navigate, but you can get access:
1.? You are correct that the "digital archives" only goes as far
back as 2012, BUT:
2.? Earlier-than-2012 issues (actually, individual articles) are
also available all the way back to 1913 or thereabouts, but via a
different process:
2a.? Start at ARRL home page, login as ARRL member
2b. After login, go back to ARRL home page (if not already there)
and click on "Technology"
2c. Click on "Periodicals archive and search"
2d. Enter various search items into text blocks, e.g., month, or
year, or authors name, etc.? In this case, enter "2002" for the
year, "Feburary" for the month, and "twin-lead dipole" for the
title/keywords, and a new window will pop up providing a link to
the article.
This "search" process can also be used for any year of QST
(including the "digital archives".)? Although the process to
access articles is different for pre-2012 vs. 2012-and-on years.
Mike N4MWP
On 10/2/24 18:08, AE4GW-Greg Wilde
wrote:
I looked and the digital archives for QST just go back to
2012.
73,
Greg Wilde, AE4GW
On Wed, Oct 2, 2024, 6:01?PM
Tobias KK7BCO/2M0TFF via <feltusfecit1= [email protected]>
wrote:
ARRL members have access to the archives. I can
look if I remember.
On Wed, Oct 2, 2024, 14:59
william Northcote via
<william.northcote= [email protected]>
wrote:
Ask the ARRL if they have a digital copy. I
know they have them on CD for past publications.
2M0WHN
My father gave me this article back in 2002 and
we made a few dipoles.? I'd love to get a copy of
this article, but can't find it anywhere online.?
Would anyone happen to have a copy of this???
I think these dipoles are made from foam twinlead.?
Maybe I am remembering the wrong article.
?
73,
?
Jerry? K8CMI
--
To know a man, walk
a mile in his shoes. You will be one mile away and
wearing new shoes.
If you loan someone ?20 and never see them again, think
of it as a good investment.
|
Re: Home Power Supply for Yaseu Ft 818nd
They all drop a bit. You must be reading a digital volt meter. If it was analog, you'd never notice.?
Mike WA1MAD
On Oct 4, 2024 1:33 PM, Al WB9UVJ <markaren1@...> wrote: Well I received the power supply I linked above and it is quiet it seems.? However during transmit the 12 volts drops almost a volt.? While it seems nice, I am going to return it to Amazon.? My suspicion is the voltage drop will be more pronounced when the supply heats up.
?
--
Al Skierkiewicz
WB9UVJ
|
Re: Feb QST article A Portable Twin-Lead 20m Dipole
Greg:
I sent you a pdf of the article.? I also sent it to the group.
On Fri, Oct 4, 2024 at 3:50 PM, Mike Dinolfo <mdinolfo@...> wrote:
Greg:
Unfortunately, ARRL's offering of archival issues of QST can be
somewhat difficult to navigate, but you can get access:
1.? You are correct that the "digital archives" only goes as far
back as 2012, BUT:
2.? Earlier-than-2012 issues (actually, individual articles) are
also available all the way back to 1913 or thereabouts, but via a
different process:
2a.? Start at ARRL home page, login as ARRL member
2b. After login, go back to ARRL home page (if not already there)
and click on "Technology"
2c. Click on "Periodicals archive and search"
2d. Enter various search items into text blocks, e.g., month, or
year, or authors name, etc.? In this case, enter "2002" for the
year, "Feburary" for the month, and "twin-lead dipole" for the
title/keywords, and a new window will pop up providing a link to
the article.
This "search" process can also be used for any year of QST
(including the "digital archives".)? Although the process to
access articles is different for pre-2012 vs. 2012-and-on years.
Mike N4MWP
On 10/2/24 18:08, AE4GW-Greg Wilde
wrote:
I looked and the digital archives for QST just go back to
2012.
73,
Greg Wilde, AE4GW
On Wed, Oct 2, 2024, 6:01?PM
Tobias KK7BCO/2M0TFF via <feltusfecit1= [email protected]>
wrote:
ARRL members have access to the archives. I can
look if I remember.
On Wed, Oct 2, 2024, 14:59
william Northcote via
<william.northcote= [email protected]>
wrote:
Ask the ARRL if they have a digital copy. I
know they have them on CD for past publications.
2M0WHN
My father gave me this article back in 2002 and
we made a few dipoles.? I'd love to get a copy of
this article, but can't find it anywhere online.?
Would anyone happen to have a copy of this???
I think these dipoles are made from foam twinlead.?
Maybe I am remembering the wrong article.
?
73,
?
Jerry? K8CMI
--
To know a man, walk
a mile in his shoes. You will be one mile away and
wearing new shoes.
If you loan someone ?20 and never see them again, think
of it as a good investment.
|
Re: Home Power Supply for Yaseu Ft 818nd
I think it was a good decision to send the PS back. No power supply of any worth should do that. It makes me wonder if it's a design issue, or just a bad one that didn't get rejected in QC. Good luck with whatever you get to replace it.
On Fri, Oct 4, 2024 at 1:33 PM, Al WB9UVJ <markaren1@...> wrote: Well I received the power supply I linked above and it is quiet it seems.? However during transmit the 12 volts drops almost a volt.? While it seems nice, I am going to return it to Amazon.? My suspicion is the voltage drop will be more pronounced when the supply heats up.
?
--
Al Skierkiewicz
WB9UVJ
|
Re: Home Power Supply for Yaseu Ft 818nd
The $7 power supply mentioned earlier would likely be a better match than the power supply you linked to on Amazon. The $7 PS is made for industrial applications and likely handles larger power draws better.
Also, the $7 PS can be adjusted up to 14v, as mentioned on the MFG datasheet.
I ordered 3, and with shipping and taxes it worked out to $11/ea (< $34 for all 3), I'm sure I'll find QRP applications for that little PS.
toggle quoted message
Show quoted text
On Oct 4, 2024, at 12:33, Al WB9UVJ <markaren1@...> wrote:
? Well I received the power supply I linked above and it is quiet it seems.? However during transmit the 12 volts drops almost a volt.? While it seems nice, I am going to return it to Amazon.? My suspicion is the voltage drop will be more pronounced when the supply heats up.
?
--
Al Skierkiewicz
WB9UVJ
|
Re: Feb QST article A Portable Twin-Lead 20m Dipole
Mike,?
Thanks for that information.? I was not aware of that.?
Greg Wilde, AE4GW
Greg:
Unfortunately, ARRL's offering of archival issues of QST can be
somewhat difficult to navigate, but you can get access:
1.? You are correct that the "digital archives" only goes as far
back as 2012, BUT:
2.? Earlier-than-2012 issues (actually, individual articles) are
also available all the way back to 1913 or thereabouts, but via a
different process:
2a.? Start at ARRL home page, login as ARRL member
2b. After login, go back to ARRL home page (if not already there)
and click on "Technology"
2c. Click on "Periodicals archive and search"
2d. Enter various search items into text blocks, e.g., month, or
year, or authors name, etc.? In this case, enter "2002" for the
year, "Feburary" for the month, and "twin-lead dipole" for the
title/keywords, and a new window will pop up providing a link to
the article.
This "search" process can also be used for any year of QST
(including the "digital archives".)? Although the process to
access articles is different for pre-2012 vs. 2012-and-on years.
Mike N4MWP
On 10/2/24 18:08, AE4GW-Greg Wilde
wrote:
I looked and the digital archives for QST just go back to
2012.
73,
Greg Wilde, AE4GW
On Wed, Oct 2, 2024, 6:01?PM
Tobias KK7BCO/2M0TFF via <feltusfecit1= [email protected]>
wrote:
ARRL members have access to the archives. I can
look if I remember.
On Wed, Oct 2, 2024, 14:59
william Northcote via
<william.northcote= [email protected]>
wrote:
Ask the ARRL if they have a digital copy. I
know they have them on CD for past publications.
2M0WHN
My father gave me this article back in 2002 and
we made a few dipoles.? I'd love to get a copy of
this article, but can't find it anywhere online.?
Would anyone happen to have a copy of this???
I think these dipoles are made from foam twinlead.?
Maybe I am remembering the wrong article.
?
73,
?
Jerry? K8CMI
--
To know a man, walk
a mile in his shoes. You will be one mile away and
wearing new shoes.
If you loan someone ?20 and never see them again, think
of it as a good investment.
|
Re: Feb QST article A Portable Twin-Lead 20m Dipole
Greg:
Unfortunately, ARRL's offering of archival issues of QST can be
somewhat difficult to navigate, but you can get access:
1.? You are correct that the "digital archives" only goes as far
back as 2012, BUT:
2.? Earlier-than-2012 issues (actually, individual articles) are
also available all the way back to 1913 or thereabouts, but via a
different process:
2a.? Start at ARRL home page, login as ARRL member
2b. After login, go back to ARRL home page (if not already there)
and click on "Technology"
2c. Click on "Periodicals archive and search"
2d. Enter various search items into text blocks, e.g., month, or
year, or authors name, etc.? In this case, enter "2002" for the
year, "Feburary" for the month, and "twin-lead dipole" for the
title/keywords, and a new window will pop up providing a link to
the article.
This "search" process can also be used for any year of QST
(including the "digital archives".)? Although the process to
access articles is different for pre-2012 vs. 2012-and-on years.
Mike N4MWP
On 10/2/24 18:08, AE4GW-Greg Wilde
wrote:
toggle quoted message
Show quoted text
I looked and the digital archives for QST just go back to
2012.
73,
Greg Wilde, AE4GW
On Wed, Oct 2, 2024, 6:01?PM
Tobias KK7BCO/2M0TFF via <feltusfecit1= [email protected]>
wrote:
ARRL members have access to the archives. I can
look if I remember.
On Wed, Oct 2, 2024, 14:59
william Northcote via
<william.northcote= [email protected]>
wrote:
Ask the ARRL if they have a digital copy. I
know they have them on CD for past publications.
2M0WHN
My father gave me this article back in 2002 and
we made a few dipoles.? I'd love to get a copy of
this article, but can't find it anywhere online.?
Would anyone happen to have a copy of this???
I think these dipoles are made from foam twinlead.?
Maybe I am remembering the wrong article.
?
73,
?
Jerry? K8CMI
--
To know a man, walk
a mile in his shoes. You will be one mile away and
wearing new shoes.
If you loan someone ?20 and never see them again, think
of it as a good investment.
|
Re: Feb QST article A Portable Twin-Lead 20m Dipole
I looked and the digital archives for QST just go back to 2012.
73,
Greg Wilde, AE4GW
On Wed, Oct 2, 2024, 6:01?PM Tobias KK7BCO/2M0TFF via <feltusfecit1= [email protected]> wrote: ARRL members have access to the archives. I can look if I remember.
On Wed, Oct 2, 2024, 14:59 william Northcote via <william.northcote= [email protected]> wrote: Ask the ARRL if they have a digital copy. I know they have them on CD for past publications.
2M0WHN
My father gave me this article back in 2002 and we made a few dipoles.? I'd love to get a copy of this article, but can't find it anywhere online.? Would anyone happen to have a copy of this???
I think these dipoles are made from foam twinlead.? Maybe I am remembering the wrong article.
?
73,
?
Jerry? K8CMI
--
To know a man, walk a mile in his shoes. You will be one mile away and wearing new shoes.
If you loan someone ?20 and never see them again, think of it as a good investment.
|
Andy GD1MIP
Mike EI9FEB
Willi, DK6DT
Franco Corsi
Michael Davis
Al WB9UVJ
Mike Dinolfo