Re: Nickel-Based Batteries [consider LiFePO4 accumulator]
NiMh packs, properly maintained: 1,000 discharge-charge cycles.
Lithium: 350.
If you live in extremely cold regions, Lithium perfoms a bit bettet.
If you want to charge ?a pack?and leave it un-used for six months, Lithium will hold its charge longer than NiMH.
I do not understand hams' blind infatuation with Lithium chemistries for HTs.
--
Clint Bradford K6LCS
http//www.work-sat.com
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Re: Nickel-Based Batteries [consider LiFePO4 accumulator]
I always get a smile when I read things like this.
I went through the Agency's school at Camp Peary.? They talked about
planting bugs in foreign embassy's and consulates during construction and
not being able to get back inside to change batteries in the bugs
later.? The solution: the technology EXISTED to build batteries that
would last years, and years, and years.? That was what they
used.? They said the reason why that technology is not available to
the consumer is because battery companies want to sell
batteries.
That was in 1994.
I also remember in high school auto shop in the early 1970s the teacher
told us that the 100 mpg carburetor had been invented.? He said the
design was purchased by the oil companies and locked away in a safe never
to be seen again.? Why?? Because they want to sell
gasoline.
I'm sure this type of thing exists elsewhere, too.? It's like what I
tell my wife often: be very careful before you throw away something just
because it is old.? What you buy today to replace it will not be the
same quality as the item you tossed away.
It's sad, but true.? We complain about saving the environment and
yet we live in a disposable world...
- Mike
===========================================================
At 03:24 AM 2/19/2023, you wrote:
toggle quoted message
Show quoted text
LiFePO4 accumulator is better
than NiMH - especially A123 Systems - now NEC:
Lithium Iron Phosphate (LiFePO4) and A123 batteries.
PERHAPS THE BEST BATTERY TECHNOLOGY AVAILABLE:
Quote: "...
In a situation where a LiPo might explode into flames, the LiFePO4 cell
will probably just vent some harmless gas.
LiFePO4 Pro's:
??? very high power/weight ratio
??? very low self-discharge
??? more tollerant of over/under-charge/discharge
??? can be used for RC gear without needing
regulators
LiFePO4 Con's:
??? Only a limited range of battery capacities currently
available
??? Odd-sizes for most cells (not AA, C, D, etc)
??? LiFePO4-capable charger needed
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Re: Nickel-Based Batteries [consider LiFePO4 accumulator]
I am sorry. It was one of my first messages.
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Re: Nickel-Based Batteries [consider LiFePO4 accumulator]
Did anyone else get about 50 of these? Where is the moderator? Sent from Chris's iPhone.
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Show quoted text
On Feb 19, 2023, at 06:28, glennmhdk <glenn.mh.dk@...> wrote:
? [Edited Message Follows]
LiFePO4 accumulator is better than NiMH - especially A123 Systems - now NEC: Lithium Iron Phosphate (LiFePO4) and A123 batteries. PERHAPS THE BEST BATTERY TECHNOLOGY AVAILABLE: https://www.rcmodelreviews.com/baffledbybatteries4.shtml Quote: "... In a situation where a LiPo might explode into flames, the LiFePO4 cell will probably just vent some harmless gas. LiFePO4 Pro's: ??? very high power/weight ratio ??? very low self-discharge ??? more tollerant of over/under-charge/discharge ??? can be used for RC gear without needing regulators LiFePO4 Con's: ??? Only a limited range of battery capacities currently available ??? Odd-sizes for most cells (not AA, C, D, etc) [I have bought AA (600mAh 3.2V; six have 1200mAh 9.6V 2P3S) and AAA (200mAh 3.2V) size in 2023 - presently untested] ??? LiFePO4-capable charger needed ..."
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Re: Nickel-Based Batteries [consider LiFePO4 accumulator]
LiFePO4 accumulator is better than NiMH - especially A123 Systems - now NEC:
Lithium Iron Phosphate (LiFePO4) and A123 batteries.
PERHAPS THE BEST BATTERY TECHNOLOGY AVAILABLE:
https://www.rcmodelreviews.com/baffledbybatteries4.shtml
Quote: "...
In a situation where a LiPo might explode into flames, the LiFePO4 cell will probably just vent some harmless gas.
LiFePO4 Pro's:
??? very high power/weight ratio
??? very low self-discharge
??? more tollerant of over/under-charge/discharge
??? can be used for RC gear without needing regulators
LiFePO4 Con's:
??? Only a limited range of battery capacities currently available
??? Odd-sizes for most cells (not AA, C, D, etc) [I have bought AA (600mAh 3.2V; six have 1200mAh 9.6V 2P3S and a FBA-25A) and AAA (200mAh 3.2V) size in 2023 - presently untested]
??? LiFePO4-capable charger needed
..."
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Re: Battery FNB-83 disassembled
Please do not use the gold screw connections to measure the accumulator pack voltage - this won't work.
Always use the silver connections to measure the accumulator pack voltage.
The FT-60 CHG terminal charges with about 200mA whatever the accumulator pack voltage - up to 10 to 12V.
-
I have just disassembled a FNB-83. (do not unscrew them, it does not help you disassembling it)
Connections seen from back and with the latch-landing and gold screws at bottom.
The silver connections at the top directly connects to six NiMH AA accumulator in series; plus(left) and ground(right).
Between cell 4 and 5 (from ground and connected in series here) there is a thermostat marked: IP505BC-B 80C. ISUZU 12C.
The leftmost gold screw connects to plus through a power Schottky diode - SR240. Physically placed between cell 5 and 6 (not connected here). ( )
The middle gold screw connects to ground.
The right screw connects to small-signal glass diode to ground. Physically placed between cell 2 and 3 (not connected here). Possibly used for end-of-charge temperature measurement.
Non of the gold screw connections are used in FT-60.
The FT-60 CHG terminal connects directy to the cell 1 ground (minus). According to the FT-60 service manual the CHG terminal charge with about 200mA ( (2.0V-0.6V)/(6.8 ohm) ). Whatever the accumulator pack voltage - up to 10 to 12V.
Thats it.
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Re: 12V Ext Power Plug Size ? For Yaseu FT-60r
LOL
--
Gary
KY8M
Macomb, MI.
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Re: 12V Ext Power Plug Size ? For Yaseu FT-60r
I can only view black-and-white videos on my several FT-60R HTs …
Clint K6LCS
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Show quoted text
On Feb 10, 2023, at 9:17 AM, dcx3420 via < dcx3420@...> wrote:
I can stream movies and watch youtube videos without any problems
--
Clint Bradford K6LCS
http//www.work-sat.com
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Re: 12V Ext Power Plug Size ? For Yaseu FT-60r
Sorry hit the wrong button. Please ignore.
On Friday, February 10, 2023 at 12:10:20 PM EST, dcx3420 via groups.io <dcx3420@...> wrote:
I can stream movies and watch youtube videos without any problems, have a tv show streaming now as I am typing this.
On Monday, January 23, 2023 at 10:22:03 AM EST, Frank <rftech@...> wrote:
[Edited Message Follows]
Hi Dave,
Thanks for the info. I just wanted to verify if it was a 1.7mm x 4.1 plug before I purchased a few.
Looks like MOUSER wants $1.60 for the plug and then Ebay China ripoff sellers want you to buy a qty of 10 and even spend more.
OK, thanks again Dave.
Frank KF2YD
--
Gary
KY8M
Macomb, MI.
-- Gary KY8M Macomb, MI.
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Re: 12V Ext Power Plug Size ? For Yaseu FT-60r
I can stream movies and watch youtube videos without any problems, have a tv show streaming now as I am typing this.
On Monday, January 23, 2023 at 10:22:03 AM EST, Frank <rftech@...> wrote:
[Edited Message Follows]
Hi Dave,
Thanks for the info. I just wanted to verify if it was a 1.7mm x 4.1 plug before I purchased a few.
Looks like MOUSER wants $1.60 for the plug and then Ebay China ripoff sellers want you to buy a qty of 10 and even spend more.
OK, thanks again Dave.
Frank KF2YD
-- Gary KY8M Macomb, MI.
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Re: Nickel-Based Batteries
The original page is gone.
A backup is here:
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Re: Rechargeable Batteries — Compared And Explained In Detail (NiMH, NiZn, NiCd, RAM In AAA, AA, C, D, 9V Sizes)
The original page is gone.
Here is the backup:
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Re: Transmit audio problem. Anyone here work on these?
The jack does cut the speaker and mic on the radio when a plug is inserted but I tested it and it works. Good call though! I think I’ve narrowed it down to the pre amp or amp but need to test that theory.?
On Mon, Feb 6, 2023 at 16:00 Andy KI6SEP < ki6sep@...> wrote: I wonder if it could?be the connector for the mic of the spk/mic jack?? I don't know (amd, to be honest, haven't looked at the schematic) if the connection?for the internal mic is routed through the jack or if the internal?mic goes directly to the circuitry with the jack only having a logical connection that indicates when something is plugged in?? If the internal mic goes through the jack, that could be a single point of failure which would take out both the internal and external mics.
A quick test would be to try transmitting and using the DTMF buttons (i.e.: the numeric?keypad).? If you hear tones on the receiving rig, you know it is something in the mic circuitry.??
Andu KI6SEP
Thank you, it is the TX audio though. I did try a hand mic as well. On Sun, Feb 5, 2023 at 11:34 Les < n9trz@...> wrote:
Try an external speaker, maybe by chance the jack is bad or the speaker.?
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Re: Transmit audio problem. Anyone here work on these?
I wonder if it could?be the connector for the mic of the spk/mic jack?? I don't know (amd, to be honest, haven't looked at the schematic) if the connection?for the internal mic is routed through the jack or if the internal?mic goes directly to the circuitry with the jack only having a logical connection that indicates when something is plugged in?? If the internal mic goes through the jack, that could be a single point of failure which would take out both the internal and external mics.
A quick test would be to try transmitting and using the DTMF buttons (i.e.: the numeric?keypad).? If you hear tones on the receiving rig, you know it is something in the mic circuitry.??
Andu KI6SEP
Thank you, it is the TX audio though. I did try a hand mic as well. On Sun, Feb 5, 2023 at 11:34 Les < n9trz@...> wrote:
Try an external speaker, maybe by chance the jack is bad or the speaker.?
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Re: Transmit audio problem. Anyone here work on these?
Thank you, it is the TX audio though. I did try a hand mic as well.
On Sun, Feb 5, 2023 at 11:34 Les < n9trz@...> wrote:
Try an external speaker, maybe by chance the jack is bad or the speaker.?
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Re: Transmit audio problem. Anyone here work on these?
I like the extra frequency coverage too.108 to 999 (except for some cellular frequencies). FT-70 receives from 108–580 MHz.
--
Gary
KY8M
Macomb, MI.
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Re: Transmit audio problem. Anyone here work on these?
Mike I believe his issue is with no audio on receive. I did read the link, good info there.
--
Gary
KY8M
Macomb, MI.
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Re: Transmit audio problem. Anyone here work on these?
You can adjust the squelch on the 70R by pressing two buttons and
turning the knob on the top.? Fairly simple if you do it often
enough to remember.? Look at the manual on the web.
73, Nick, AA3T
On 2/4/2023 7:31 PM, dcx3420 via
groups.io wrote:
Yes, too bad. You will find something. I had mine for sale but
changed my mind when I saw the 70r I believe does not have a knob
for squelch.?
It's always fun window shopping though for a new radio. Lots out
there to choose from.
Good Luck & 73
--
Gary
KY8M
Macomb, MI.
--
Sent from laptop
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Re: Transmit audio problem. Anyone here work on these?
Thank you. I am going to check that but need to get the right equipment. I read through that and I seem to remember there was something I needed.
John, maybe adjusting the TX Deviation in Alignment Mode might help?
I can't think of anything off the top of my head that would cause those values to change on their own but stranger things have happened.
The service manual explains how to enter the Alignment Mode, if you don't have a copy of the manual, you can download one from the "Files" section of this group.
Here is a link to a video showing the process,
I have a pdf detailing the process somewhere on my computer but I can't locate it at the moment, but the video shows the same process.?
Maybe that will get you squared away.
Mike / W5SKK
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Re: Transmit audio problem. Anyone here work on these?
John, maybe adjusting the TX Deviation in Alignment Mode might help?
I can't think of anything off the top of my head that would cause those values to change on their own but stranger things have happened.
The service manual explains how to enter the Alignment Mode, if you don't have a copy of the manual, you can download one from the "Files" section of this group.
Here is a link to a video showing the process,
I have a pdf detailing the process somewhere on my computer but I can't locate it at the moment, but the video shows the same process.?
Maybe that will get you squared away.
Mike / W5SKK
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Clint Bradford
Chris Smart