Mmmm, careful.? At 88 watt-hours, that's barely more than 7ah at
12v, not counting internal conversion losses.? The inverter may be
able to source 100 or 300 watts, but not for long.? 300 watts from
an 88 watt-hour battery will drain it in something like 15 minutes.?
Of course the FT-817/818 draws considerably less - you'd likely get
5+ hours of use - but there's no Tardis-derived magic here.? Start
plugging other stuff in, and the run time can drop very quickly.
When looking at these "Solar generators", the important spec to look
at is the watt-hour rating of the battery.? The AC output spec is
just for the inverter; it's a limit for how much (peak) power can be
drawn, not for how long.
Greg? KO6TH
Ron Wright via groups.io wrote:
toggle quoted message
Show quoted text
Martin,
Yes there a lots of power
banks that put out USB power and 12VDC power and also 120VAC
power, all in one battery box.? I have 2 with 120VAC output
along with USB and 12VDC outlets.? They come in a verity of
power levels, mine are 100 & 300W.
There are other that can
power a FT817 for hours that put out USB and 12VDC.
Here is one on Amazon.? No
tsure if you need 120 or 240VAC.
73, ron, n9ee/r
Ron Wright, N9EE/R
Hernando Co ARES EC
Spring Hill, Florida also n9ee55@...
On Tuesday, March 11, 2025 at 08:05:32 PM EDT, Kevin -
K5KTM via groups.io <ktmullens@...>
wrote:
Nice that it’s multi-use but that thing is huge.?
On Mar 11, 2025, at 13:52,
Martin HB3YDM via groups.io
<hb3ydm@...> wrote:
?
Hey Guys?
check your YouTube the channel from Jason
KM4ACK
this last Video bring s greatfully battery
pack.
?
?
?
or when you have an Car Start helper this
tool is also very light.
?
?
Vy 73 de Martin HB3YDM
|
Martin,
Yes there a lots of power banks that put out USB power and 12VDC power and also 120VAC power, all in one battery box.? I have 2 with 120VAC output along with USB and 12VDC outlets.? They come in a verity of power levels, mine are 100 & 300W.
There are other that can power a FT817 for hours that put out USB and 12VDC.
Here is one on Amazon.? No tsure if you need 120 or 240VAC.
73, ron, n9ee/r Ron Wright, N9EE/R Hernando Co ARES EC
Spring Hill, Florida also n9ee55@...
On Tuesday, March 11, 2025 at 08:05:32 PM EDT, Kevin - K5KTM via groups.io <ktmullens@...> wrote:
Nice that it’s multi-use but that thing is huge.?
On Mar 11, 2025, at 13:52, Martin HB3YDM via groups.io <hb3ydm@...> wrote:
? Hey Guys?
check your YouTube the channel from Jason KM4ACK
this last Video bring s greatfully battery pack.
?
?
?
or when you have an Car Start helper this tool is also very light.
?
?
Vy 73 de Martin HB3YDM
|
Nice that it’s multi-use but that thing is huge.?
toggle quoted message
Show quoted text
On Mar 11, 2025, at 13:52, Martin HB3YDM via groups.io <hb3ydm@...> wrote:
? Hey Guys?
check your YouTube the channel from Jason KM4ACK
this last Video bring s greatfully battery pack.
?
?
?
or when you have an Car Start helper this tool is also very light.
?
?
Vy 73 de Martin HB3YDM
|
Hey Guys?
check your YouTube the channel from Jason KM4ACK
this last Video bring s greatfully battery pack.
?
?
?
or when you have an Car Start helper this tool is also very light.
?
?
Vy 73 de Martin HB3YDM
|
Two ordinary 5 volt power banks of sufficient ah ratings wired in series creates 10 volts which is about the ideal voltage for the radio.
On Tue, Mar 11, 2025 at 12:09 PM, Ken N2VIP <ken@...> wrote: There is USB-C, the connector standard, and USB-C PD which supports higher voltages and current ratings (like charging laptop batteries).
?
If I understand the OP's desire, he wants a power bank that outputs proper voltages for both their cellphone and their FT-817.
?
TalentCell has some interesting power banks, like this:
?
?
But this particular model lacks a high-current/high-voltage USB-C PD port...
?
Personally I'd prefer something like this:
?
- A Bioenno 9 Amp LiFePO4 battery & charger (still on BOGO at $115 plus shipping for TWO batteries and TWO chargers)
?
- This PowerWerx USB-C QC adapter: $30
?
- A powerpole panel mount to power the FT-817
?
- A small Harbor Freight case, like this:
?
Yes, that takes you to $200, but if you can find a friend to split the BOGO deal on the battery, you're now under $150 for a great, robust power solution.
?
Hope this helps,
?
Ken, N2VIP
?
Ken
?
|
There is USB-C, the connector standard, and USB-C PD which supports higher voltages and current ratings (like charging laptop batteries).
?
If I understand the OP's desire, he wants a power bank that outputs proper voltages for both their cellphone and their FT-817.
?
TalentCell has some interesting power banks, like this:
?
?
But this particular model lacks a high-current/high-voltage USB-C PD port...
?
Personally I'd prefer something like this:
?
- A Bioenno 9 Amp LiFePO4 battery & charger (still on BOGO at $115 plus shipping for TWO batteries and TWO chargers)
?
- This PowerWerx USB-C QC adapter: $30
?
- A powerpole panel mount to power the FT-817
?
- A small Harbor Freight case, like this:
?
Yes, that takes you to $200, but if you can find a friend to split the BOGO deal on the battery, you're now under $150 for a great, robust power solution.
?
Hope this helps,
?
Ken, N2VIP
?
Ken
?
|
Daniel.
?
The answer to your question is? yes,, both the setups you sho
will essentially work the same.
?
73, Bob GM4CID
|
What modes you use? Does the power bank or the cable heat up?
Em ter., 11 de mar. de 2025, 11:03, sharudin senapi via <aidiesha= yahoo.com@groups.io> escreveu:
Hi I am using Power Delivered USB C that can produce 12v to my 817
73 9w2d
On Tuesday, March 11, 2025, 9:59 PM, NE1AM - Ryan via <ryan.ruby=gmail.com@groups.io> wrote: USB-C can natively handle up to 5 amps.? Your phone has the circuitry built-in to use up to that amount.? As long as its 12V and <= 5A then you are good to go!
Ryan
NE1AM
|
Hi I am using Power Delivered USB C that can produce 12v to my 817
On Tuesday, March 11, 2025, 9:59 PM, NE1AM - Ryan via groups.io <ryan.ruby@...> wrote: USB-C can natively handle up to 5 amps.? Your phone has the circuitry built-in to use up to that amount.? As long as its 12V and <= 5A then you are good to go!
Ryan
NE1AM
|
USB-C can natively handle up to 5 amps.? Your phone has the circuitry built-in to use up to that amount.? As long as its 12V and <= 5A then you are good to go!
Ryan
NE1AM
|
I was wondering if it is possible to have a power bank?to charge my phone (while hiking) and also to have it as a backup power source for the?Yaesu.
Not only voltage and current ratings on websites like Amazon are confusing (and probably wrong),?but I'm also insecure if a USB-C to DC cable would?handle the?~2.6 A current the?Yaesu uses to TX?(I use a lot of FT8).?
Is it possible to have a power bank to meet my needs? What kind of criteria should I look for?
|
Mostly heat in the transmission line and finals. If it's an antenna with radials on the ground, resistive ground losses. ?
|
Wow..I didn't know it was so lossy! Out of curiosity: the case of one radiator, where does the 2/3 of the power go?
Daniel PY2TDB.
Daniel:
If black is the radio, which is about 20 cm, they are functionally equivalent.? Neither is optimal, however due to the radiator of the antenna you described being shortened by about 1/3 relative to a 1/4-wave radiator and there being only one radial. A few more radials in this configuration could add a few more dB to your signal. Basically, with one radial, you're cutting effective power to less than a third. I'm assuming a vertical radiator and 1/4 wave radial at 90 degrees.?
?
Number of 1/4λ Radials and approximate?ERP?
- 1 radial: ?? x ~0.35 power (puts out about 1/3 of what goes in assuming a 1/4 wave radiator and other optimum conditions)
- 2 radials: ?x ~0.45?
- 4 radials: ?x ~0.65
- 8 radials: ? x ~0.85
Jim
WB0KWJ
?
|
Daniel:
If black is the radio, which is about 20 cm, they are functionally equivalent. ?Neither is optimal, however due to the radiator of the antenna you described being shortened by about 1/3 relative to a 1/4-wave radiator and there being only one radial. A few more radials in this configuration could add a few more dB to your signal. Basically, with one radial, you're cutting effective power to less than a third. I'm assuming a vertical radiator and 1/4 wave radial at 90 degrees.?
?
Number of 1/4λ Radials and approximate?ERP?
- 1 radial: ?? x ~0.35 power (puts out about 1/3 of what goes in assuming a 1/4 wave radiator and other optimum conditions)
- 2 radials: ?x ~0.45?
- 4 radials: ?x ~0.65
- 8 radials: ? x ~0.85
Jim
WB0KWJ
?
|
Hello,
I have a question: Are these setups equivalent (radiation-wise)?
Purple: Portable antenna for, say, 10 m (think of a GRA-1899T) Blue: Ground/radial of 2.5 m Black: Yaesu
 Daniel PY2TDB.
|
Re: Sotabeams speech compressor
OK so, my ssb mic gain is now 50, without compressor my ALC shows no bars, with compressor it shows 3 bars. Power meter, set to PEP not AVG no compressor shows 1.5w with 5w on a whistle but with compressor shows 4w with 5w on a whistle.
Say @ 4dB extra.?
Using a kiwisdr in Germany without compressor showed no signal on waterfall but very very faint audio, not enough to copy. With compressor there was a trace on the waterfall and audio was stronger, clear and copyable. This was from an efrw in gloucestershire back garden in inverted L highest point 6m. Next doors house is currently encased in scaffolding and tin sheets so my signal was probably not very good.
Looks promising, next time I'll be on top of gloucestershires highest point with a full sized dipole.
Pot settings inside compressor are as set from factory, halfway through adjustment.?
Andy
|
Re: Sotabeams speech compressor
A compressor will increase average loudness and thus power, but readability is reduced as it is increased and beyond a point very much. Those with hearing impairments may find readability reduced more. In practice 3W to 4.5W isn't much increase in range, so compressor may not help much compared to so simply adding a 20W PA, which on average with uncompressed SSB might look like 10W.
A peak reading power meter gives a better idea of power and a DX signal report of readability. Almost all power meters will give an average, not even RMS, with speech.
|
Re: Witch DSP Filter is Better? BHI or Sotabeams?
I had the laserbeam filter unit installed in my 817nd for a while. It does work but has a couple of annoying side effects. Well, at least mine did.
?
First, the metering for signal strength is thrown way off. Not the end of the world, but a bit nippy.
?
Second, and most annoyingly, the filter creates ghost images of strong signals. These were a couple of kHz away from the actual signal. I can't remember the exact offset but it was a pain in the hoop to constantly flip the filter in and out of line to see if I was listening to a real signal or an image. This could partially be worked around by using the IF Shift on the radio.? The filter was installed exactly as per the instructions. I am very comfortable working with surface mount components and have confidence in my work. I even removed and re-installed it in case there was some hidden issue with my work but that made zero difference.?
?
The second issue was annoying enough for me to eventually remove the filter and throw it in the bin. I approached sotabeams about the issue at the time but they were less than energetic in their response.
?
I eventually managed to source a 500Hz Collins mechanical filter for a VERY reasonable price and use that in the radio. The difference is night and day!
?
Given the current cost of mechanical filters, I'd go for the BHI option.?
?
This is just my experience and I'm sure others are happy with the laserbeam. It is cheap after all.?
?
Cheers,?
Ronan
MM0IVR?
|
Re: Witch DSP Filter is Better? BHI or Sotabeams?
Another option is the external 4StatesQRP HI-PER-MITE audio CW filter kit . ?This filter ?is 200 Hz wide and has no ringing - a truly ?amazing 4 pole filter with 3 low pass filters and 1 high pass filter cascaded together. ??
All background hiss is essentially eliminated when the filter is engaged. ?
?
Google ‘HI-PER-MITE’ for more info including an audio demo of this CW audio filter in action.
|
Re: Witch DSP Filter is Better? BHI or Sotabeams?
Hi Mike, check YouTube, I think he has an or mor Videos See under ?Sotabeams FT-817“ I hope this helps for your search on YouTube.
?
73 de Martin, HB3YDM
|
Kevin - K5KTM
Martin HB3YDM
M0RON
Mike EI9FEB
Ham Radio