On Wed, Mar 26, 2025 at 09:44 PM, vbifyz wrote:
You need to understand what you are doing, like closely matching the 2 strings
of 3 cells each when installing. Instruction manual is not included, but can
be found online.
That sounds like a really bad design. The cells do not stay matched and how do you match capacity? Any proper charger for multiple series LiIon cells needs a controller than measures each cell.
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Or search for "aili 18650 powerbank".
This is the kind that satisfies the requirements. I haven't tested it for EMI with my FT-817 yet. Using it as an extra power for laptops.
It can charge from a 19V laptop power adapter with 5.5x2.1mm barrel tip and can output 5/6/9/12/15/19V selectable by mechanical switches on its 5.5x2.1mm socket. Has a USB-A output for the phone as well.
The best part for field operation is that you can replace 18650 cells with ones pre-charged at home, so essentially "unlimited" capacity.
You need to understand what you are doing, like closely matching the 2 strings of 3 cells each when installing. Instruction manual is not included, but can be found online.
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73, Mike AF7KR
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Hello,
Does anyone use the Digirig for APRS? How does it work?
Daniel PY2TDB.
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Hi Dick
Thanks for help.
I did some search over the internet, but didn't get across this page. One thing that didn't came across my mind yesterday, was that you can calculate new values by multiplying lpf component values with freq(a)/freq(b). Thus the multiplier in this case is 50/75=0.67
The page you linked verifies that i am on the ballpark with calculations.
73, Jallu, OH4NDU
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I have a 12V 24 aH (13.8V 24,000 maH) LiFePo as the largest practical size pack. I have two sets of Anderson Power Poles for 12V gear and two 12V to USB-C plug 5V 3A step-down inverters (for raspberry Pi + QHD screen or whatever). I got it to power my FTdx10, but of course it's fine for my FT817ND (and optionally PAs). It's charged by 2 x "100 W" solar panels easy enough to put in a small car. I mean to get a car charger and mains charger. The MPPT controller is a Victron (cheap model with no BT, so I had to interface the TTL serial to change it from Lead Acid to LiFePO4.)
Lives in a carry-case with shoulder strap along with LED meters.
The LiFePO4 has 3000+ full cycles rating (down to 10%) and a 1/3rd of weight of Lead Acid. Safer than LiPoly/LiIon. The cheap Lead Acid Gel / SLA for emergency backup (UPS, lights, Alarms) don't even quote cycles. The more expensive ones (more expensive now than LiFePO4) are about 100 to 200 cycles, but only if not fully discharged. The 200 cycles is about 70% usage.
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Also, note - the power bank you linked to claims 20,000 mA, but at what voltage? I suspect at 3.7 volts, the voltage of the internal cells - 20,000 mA at 3.7 volts will be closer to 5,000 - 6,000 mA at 12 volts, maybe less. That may or may not meet your needs - that is something to consider when choosing power source.
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Ken, N2VIP
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?I’d stick with a 12 volt lifepo4 battery and use converters to power/charge 5 volt usb devices. I recently added the Windcamp battery kit?designed for the 817/818, it’s about $75. Also 3 18650 batteries in a 3 battery case work well and can be recharged with a 4 cell charger. Don’t risk messing with alternative power sources.?
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On Mar 22, 2025, at 7:26?PM, Ken N2VIP <ken@...> wrote:
? The connected device controls the output voltage, you would use a cable configured to "tell" the power bank to supply it with 12v.
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I don't think anything 'guarantees' the power bank won't provide a different voltage, just the presumption/expectation that the devices will work as designed.
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To power an FT-817 type of radio with 12 volts, you would use a cable designed to priced the desired voltage, like this:
https://a.co/d/hNy4MWO
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Hope this helps,
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Ken, N2VIP
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The connected device controls the output voltage, you would use a cable configured to "tell" the power bank to supply it with 12v.
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I don't think anything 'guarantees' the power bank won't provide a different voltage, just the presumption/expectation that the devices will work as designed.
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To power an FT-817 type of radio with 12 volts, you would use a cable designed to priced the desired voltage, like this:
https://a.co/d/hNy4MWO
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Hope this helps,
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Ken, N2VIP
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One more thing regarding USB-C: , for instance, states outputs of 5V/3A, 9V/3A, 12V/3A, 15V/3A, 20V/3.25A. What does garantee it will output the 12V the FT-817ND needs and not the 15V or 20V and fry the radio?
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Daniel PY2TDB.
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Good morning Everyone.,
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Looking for Dual Escort rails,
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to hold together 2 x Ft-817 radios.
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Do you have a set collecting dust?
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please contact me at my QRZ.com
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email address.
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VE3YXO
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ANDRE
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73!
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Re: I cannot turn off repeater shift mode on ten meters while in usb mode
Hi Mike,
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Could it be that SPlit is enabled?
Page 42 of the manual.
Cheers,
Steve VK2ARS
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From: mike mcglashon via groups.io
Sent: Monday, March 17, 2025 3:25 AM
Subject: [ft817] I cannot turn off repeater shift mode on ten meters
while in usb mode
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Hi
guys:
I
have a question about my ft817.
Yesterday, I was on 28336 on ten meter usb
mode.
When
I attempted to answer a buddy, and I key up the
mic,
The
frequency would shift upwards to transmit on
283445.
I
looked up the menus to see if repeater shift was on, and I got the
following:
?
Menu
Item 42 [RPT SHIFT]
Function: Set the magnitude of the Repeater
Shift.
Available Values: 0 ~ 99.99
MHz
Default: Depends on transceiver version, and the band in
use.
Each
band’s repeater shift (HF/50/144/430 MHz) may be set
independently.
?
The
thing is, when I enter menu 42 and turn the tuning knob to the left to try to
get it to 0, then hit hold the function button to get out of the
menu,
The
voice box I have reports nothing.
Has
anyone else ever encountered this problem?
?
Please advise as you like.
?
Mike
M.
?
Mike
mcglashon
AD9CA
Email:
Michael.mcglashon@...
Ph:
618 783 9331
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Re: I cannot turn off repeater shift mode on ten meters while in usb mode
did you try a full reset?
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Re: I cannot turn off repeater shift mode on ten meters while in usb mode
I do not know if the display shows an “s”. I am blind and use a voice speaker. ? ? Please advise as you like. ? Mike M. ? Mike mcglashon AD9CA Email: Michael.mcglashon@... Ph: 618 783 9331 ?
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From: [email protected] <[email protected]> On Behalf Of M0RON via groups.io
Sent: Monday, March 17, 2025 11:11 AM
To: [email protected]
Subject: Re: [ft817] I cannot turn off repeater shift mode on ten meters while in usb mode? Does the display show an S? If so split operation is on as others have suggested.?
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Re: I cannot turn off repeater shift mode on ten meters while in usb mode
Hi Mike?
Does the display show an S? If so split operation is on as others have suggested.?
Andy
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Re: I cannot turn off repeater shift mode on ten meters while in usb mode
Hi is split mode on,
Dave 2E0DMB
On Mon, 17 Mar 2025, 14:39 mike mcglashon via , <michael.mcglashon= [email protected]> wrote: Hi there: First, I have tried on other bands and do not get the split; it is only on ten meters. Second on ten meters whether cw or phone, it moves up by nearly 9 khz. Again, on other bands, whether cw or phone, it stays on same frequency. ? ? ? ? Hi Mike, ? That doesn’t sound like a repeater shift problem as repeater shift is only operational on FM. ? The shift is only 8.5 kHz so it may, in fact be that the radio is in split mode. Try changing your receive frequency to, say 28.340 and then see what the transmit frequency does when you transmit. ? Also, see if you get the same sort of result on other bands. ? I have an FT857 which has a fault (which I haven’t yet fully diagnosed) whereby it transmits 13 kHz away from the receive frequency. This occurs on all bands and modes. ? Let us know the results of those tests and we can try to diagnose further. ? ? ? Hi guys: I have a question about my ft817. Yesterday, I was on 28336 on ten meter usb mode. When I attempted to answer a buddy, and I key up the mic, The frequency would shift upwards to transmit on 283445. I looked up the menus to see if repeater shift was on, and I got the following: ? Menu Item 42 [RPT SHIFT] Function: Set the magnitude of the Repeater Shift. Available Values: 0 ~ 99.99 MHz Default: Depends on transceiver version, and the band in use. Each band’s repeater shift (HF/50/144/430 MHz) may be set independently. ? The thing is, when I enter menu 42 and turn the tuning knob to the left to try to get it to 0, then hit hold the function button to get out of the menu, The voice box I have reports nothing. Has anyone else ever encountered this problem? ? Please advise as you like. ? Mike M. ? Mike mcglashon AD9CA Email: Michael.mcglashon@... Ph: 618 783 9331 ?
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Re: I cannot turn off repeater shift mode on ten meters while in usb mode
Hi there: First, I have tried on other bands and do not get the split; it is only on ten meters. Second on ten meters whether cw or phone, it moves up by nearly 9 khz. Again, on other bands, whether cw or phone, it stays on same frequency. ? ? ?
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From: [email protected] <[email protected]> On Behalf Of Eric van de Weyer
Sent: Sunday, March 16, 2025 9:48 PM
To: [email protected]
Subject: Re: [ft817] I cannot turn off repeater shift mode on ten meters while in usb mode? Hi Mike, ? That doesn’t sound like a repeater shift problem as repeater shift is only operational on FM. ? The shift is only 8.5 kHz so it may, in fact be that the radio is in split mode. Try changing your receive frequency to, say 28.340 and then see what the transmit frequency does when you transmit. ? Also, see if you get the same sort of result on other bands. ? I have an FT857 which has a fault (which I haven’t yet fully diagnosed) whereby it transmits 13 kHz away from the receive frequency. This occurs on all bands and modes. ? Let us know the results of those tests and we can try to diagnose further. ? ? ? Hi guys: I have a question about my ft817. Yesterday, I was on 28336 on ten meter usb mode. When I attempted to answer a buddy, and I key up the mic, The frequency would shift upwards to transmit on 283445. I looked up the menus to see if repeater shift was on, and I got the following: ? Menu Item 42 [RPT SHIFT] Function: Set the magnitude of the Repeater Shift. Available Values: 0 ~ 99.99 MHz Default: Depends on transceiver version, and the band in use. Each band’s repeater shift (HF/50/144/430 MHz) may be set independently. ? The thing is, when I enter menu 42 and turn the tuning knob to the left to try to get it to 0, then hit hold the function button to get out of the menu, The voice box I have reports nothing. Has anyone else ever encountered this problem? ? Please advise as you like. ? Mike M. ? Mike mcglashon AD9CA Email: Michael.mcglashon@... Ph: 618 783 9331 ?
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Thanks everyone for your advice. I will do as K6AEF suggested and advertise the radio and filters together in the first instance.
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--
Mike G8GYW
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Re: I cannot turn off repeater shift mode on ten meters while in usb mode
Maybe your RIT setting?
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73
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I'd be interested in the CW filter :-)
73
Graham G4FUJ
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Mike EI9FEB
Michael Davis
M0RON
Graham Wright (G4FUJ)