Re: Homebrew li-ion battery pack into ubitx

Jerry Gaffke

Good info.
Can you recommend a "mini balance/charging plug"?

I'm not familiar with the devices currently out there, and the product descriptions don't really say what they do.
For example:
https://www.amazon.com/Apex-RC-Products-Battery-Charger/dp/B01BQUVMZ4/ref=pd_lpo_vtph_21_bs_lp_tr_t_1?_encoding=UTF8&psc=1&refRID=Z1YSY98PBD680GE7Z8GH
Is this just a handy way of converting between the various connector styles, or does it include some sort of balance electronics?
If it has balance electronics, does this only work during charging, or will it work without a power source to balance the battery pack
by discharging those cells that show a higher voltage than the others?

I had assumed that a battery pack meant for a balance charger could not be charged without that special balance circuit in the charger.
But then, I guess the battery is just a stack of cells with wires into each junction between cells.
Though some include protection circuits, perhaps that protection from under/over-voltage and over-current is just a lump of electronics
at one end of the battery, looks like a short until an out-of-spec condition occurs, at which point it opens up like a switch or fuse?
Again, not obvious when reading the product descriptions.

Here's a few things I think I know, corrections welcome:

Since LiPo cells generally want to be charged to a max of 4.2v per cell, for a 3 cell battery we arrive at KE0GYC's figure of 3*4.2=12.6 volts.
Other lithium battery chemistries take a different maximum cell voltage, an LiPoFe4 battery wants a max of 3.6v per cell or it will be damaged.
Maximum charge rate in Amps is the Amp-Hour capacity for the battery times the specified C for charging.
Lipo batteries for model planes are designed to be able to charge quickly, let's assume a C of 20 and a 3 Amp-Hour capacity.
In this case, we could charge it at 20*3 = 60 Amps, and it would be full in about 1hour/20 = 3 minutes.
It is much safer to charge and discharge at lower rates, in this case charging at 3 Amps for an hour would be a better bet.
If charging at 500ma, it would take 3AmpHours/0.5Amps = 6 hours.

Actual times to achieve full charge will be greater than the above calculations show, as charging currents go down
as the battery gets close to full and efficiencies are not 100%.  Batteries don't need to be charged till absolutely full.
They will last longer if you don't try to completely fill them and keep charging currents down to something reasonable.

Jerry, KE7ER

On Wed, Apr 17, 2019 at 06:30 AM, KE0GYC wrote:
ou can use any CC/CV charger set to the appropriate voltage and current settings.
I use a lot of the cheap dc-dc buck modules.

For the Turnigy pack, set the voltage to a hair under 12.6 and the current to 0.5A and connect to a DC source of 13.8V and it should charge just fine.  You can connect it directly to the discharge port.

As for balancing, I just plug one of these into the mini balance/charging plug every few charges.  It will drain the highest capacity cell slowly to balance the pack.  It doesn't need to be done every charge, but should be done periodically to maintain cell balance.

https://www.amazon.com/Turnigy-Battery-Display-Balancer-2S-6S/dp/B00USQXS1O/ref=mp_s_a_1_31?keywords=battery+balancer&qid=1555507626&s=gateway&sr=8-31

These will work with most any lipo battery pack, homebuilt or otherwise, as long as you have the right wire connections.

Re: Case

Jack Brabham - KZ5A <kz5a@...>

I don't think they are quite back from Holiday yet, but they are taking orders on ebay today.

73 Jack KZ5A

On 4/17/2019 10:02 AM, Jack Purdum via Groups.Io wrote:
Who sells the Cheval cases??

Jack, W8TEE

On Wednesday, April 17, 2019, 11:33:13 AM EDT, Fast hosts <beneagles71@...> wrote:

Great case got mine from Banggood for less than £20... going to fit my 7inch screen in a sloping mount on top of the lid..

On Wed, 17 Apr 2019 at 16:30, Jack Purdum via Groups.Io <jjpurdum=yahoo.com@groups.io> wrote:
It does look nice and not much more expensive. Thanks for bringing it to my attention!

Jack, W8TEE

On Wednesday, April 17, 2019, 11:27:51 AM EDT, Dave Dixon <wylyeguy2@...> wrote:

Jack,
I am Dave G0AYD I have 3 of these boxes one houses my V3 and matching matching case housing my home brew  T match atu.I am currently building a digital swr/pwr meter so hope to house this in my other case.They are really good and sturdy the cost of post is nearly half the price of the box.but i brushed that aside once i had got the first one..BRILLIANT CASE, if you decide to buy one you wont be disappointed.Dave G0AYD FISTS 15892.CWOPS 2109 ROYAL SIGS 4209..GQRP 3309..

On Wed, 17 Apr 2019 at 15:46, Jack Brabham - KZ5A <kz5a@...> wrote:
I have one of those cases, the panels are all steel.  Really the whole case comes across as kind of "cheezy".   The cases  I am considering for my uBITX are a Cheval SA from Thailand or possibly the Circuit Specialist Instrument case.

The Cheval case is of better design and quality but you have cost and delays associated with shipping from Bangkok.  Also at the moment, they are closed for a National Holiday week.

The cases from https://amateurradiokits.in/ are pretty neat and are pre-punched and come with all the associated goodies.  The selections available vary from day to day,  so far they haven't had the "one" I liked best available.  I think these are an excellent bargain considering the goodies bag they came with.

73 Jack KZ5A

On 4/17/2019 5:30 AM, Lawrence Galea wrote:
Probably the copy and paste didn't work and the previous link was posted instead.
Here is the correct link and I checked it

https://www.banggood.com/250x190x110mm-Blue-Metal-Electronic-Enclosures-DIY-Power-Junction-Box-p-1067251.html?cur_warehouse=CN

Wishing everyone a happy Easter

On Tue, Apr 16, 2019 at 11:23 PM Jim <Jscook@...> wrote:
That is a good recipe. Have to try it. Grin

On Apr 16, 2019, at 5:11 PM, Karl Heinz Kremer, K5KHK <khk@...> wrote:

Is this a new form of rick rolling? ;) Or are you suggesting we should leave our radios turned off on Easter and to enjoy a sweet treat instead? Or, did you post the wrong link?

--
Karl Heinz - K5KHK

--
Keith Baker - Communications technician (retired)

Re: Case

Jack, W8TEE

I'm pretty sure it was Dayton in the flea market...sorry.

Jack, W8TEE

On Wednesday, April 17, 2019, 11:43:56 AM EDT, Sam Tedesco <stedesco619@...> wrote:

@Jack,  where did you find the tuning dial?

Re: Case

Jack, W8TEE

Who sells the Cheval cases??

Jack, W8TEE

On Wednesday, April 17, 2019, 11:33:13 AM EDT, Fast hosts <beneagles71@...> wrote:

Great case got mine from Banggood for less than £20... going to fit my 7inch screen in a sloping mount on top of the lid..

On Wed, 17 Apr 2019 at 16:30, Jack Purdum via Groups.Io <jjpurdum=yahoo.com@groups.io> wrote:
It does look nice and not much more expensive. Thanks for bringing it to my attention!

Jack, W8TEE

On Wednesday, April 17, 2019, 11:27:51 AM EDT, Dave Dixon <wylyeguy2@...> wrote:

Jack,
I am Dave G0AYD I have 3 of these boxes one houses my V3 and matching matching case housing my home brew  T match atu.I am currently building a digital swr/pwr meter so hope to house this in my other case.They are really good and sturdy the cost of post is nearly half the price of the box.but i brushed that aside once i had got the first one..BRILLIANT CASE, if you decide to buy one you wont be disappointed.Dave G0AYD FISTS 15892.CWOPS 2109 ROYAL SIGS 4209..GQRP 3309..

On Wed, 17 Apr 2019 at 15:46, Jack Brabham - KZ5A <kz5a@...> wrote:
I have one of those cases, the panels are all steel.  Really the whole case comes across as kind of "cheezy".   The cases  I am considering for my uBITX are a Cheval SA from Thailand or possibly the Circuit Specialist Instrument case.

The Cheval case is of better design and quality but you have cost and delays associated with shipping from Bangkok.  Also at the moment, they are closed for a National Holiday week.

The cases from https://amateurradiokits.in/ are pretty neat and are pre-punched and come with all the associated goodies.  The selections available vary from day to day,  so far they haven't had the "one" I liked best available.  I think these are an excellent bargain considering the goodies bag they came with.

73 Jack KZ5A

On 4/17/2019 5:30 AM, Lawrence Galea wrote:
Probably the copy and paste didn't work and the previous link was posted instead.
Here is the correct link and I checked it

https://www.banggood.com/250x190x110mm-Blue-Metal-Electronic-Enclosures-DIY-Power-Junction-Box-p-1067251.html?cur_warehouse=CN

Wishing everyone a happy Easter

On Tue, Apr 16, 2019 at 11:23 PM Jim <Jscook@...> wrote:
That is a good recipe. Have to try it. Grin

On Apr 16, 2019, at 5:11 PM, Karl Heinz Kremer, K5KHK <khk@...> wrote:

Is this a new form of rick rolling? ;) Or are you suggesting we should leave our radios turned off on Easter and to enjoy a sweet treat instead? Or, did you post the wrong link?

--
Karl Heinz - K5KHK

--
Keith Baker - Communications technician (retired)

Re: Case

Jim Sheldon

Another thing to consider with the blue cases from eBay etc., the panels ARE steel, but the major problem is they are mounted in a plastic frame.  There is no continuity between the front and back panels with each other and with the rest of the case.  I have used 2 of these cases and to eliminate or at least reduce ground loops in the circuitry, I had to use heavy braid from each panel via a solder lug under the corner standoff(s) of the mounted uBITX board.  If you don't do this, no telling what will or will not work on the radio due to missing grounds if something isn't quite connected right and you might have weird results when tuning, keying, talking with the microphone, etc.

This isn't something you can ignore unless you are extremely lucky.

Jim Sheldon, W0EB

------ Original Message ------
From: "Jack Brabham - KZ5A" <kz5a@...>
Sent: 4/17/2019 9:46:29 AM
Subject: Re: [BITX20] Case

I have one of those cases, the panels are all steel.  Really the whole case comes across as kind of "cheezy".   The cases  I am considering for my uBITX are a Cheval SA from Thailand or possibly the Circuit Specialist Instrument case.

The Cheval case is of better design and quality but you have cost and delays associated with shipping from Bangkok.  Also at the moment, they are closed for a National Holiday week.

The cases from https://amateurradiokits.in/ are pretty neat and are pre-punched and come with all the associated goodies.  The selections available vary from day to day,  so far they haven't had the "one" I liked best available.  I think these are an excellent bargain considering the goodies bag they came with.

73 Jack KZ5A

On 4/17/2019 5:30 AM, Lawrence Galea wrote:
Probably the copy and paste didn't work and the previous link was posted instead.
Here is the correct link and I checked it

https://www.banggood.com/250x190x110mm-Blue-Metal-Electronic-Enclosures-DIY-Power-Junction-Box-p-1067251.html?cur_warehouse=CN

Wishing everyone a happy Easter

On Tue, Apr 16, 2019 at 11:23 PM Jim <Jscook@...> wrote:
That is a good recipe. Have to try it. Grin

On Apr 16, 2019, at 5:11 PM, Karl Heinz Kremer, K5KHK <khk@...> wrote:

Is this a new form of rick rolling? ;) Or are you suggesting we should leave our radios turned off on Easter and to enjoy a sweet treat instead? Or, did you post the wrong link?

--
Karl Heinz - K5KHK

Re: ubitx v5 down: IRF510 heatsink very hot immediately after turning on the radio

Jerry Gaffke

Raj,

In what way is the FY6800 a bit flakey to operate?
I'm very curious, as am on the verge of buying one.

Lots of the FY6800 reviews mention it is better than the previous product
(I assume the FY6600) in that BNC ground is not driven with a DC offset from power plug ground.
Some complain that it is not yet ideal, that BNC ground should be independent of power plug ground.
Also a complaint or two that the internal switching power supply is a bit noisy on the FY6800.

Webpage for the FY6800 says 1mv resolution, not 0.1mv.
Do the FY6800 knobs really allow 0.1mv resolution in setting the pk-pk amplitude?

Webpage for the FY6600 also claims 1mv resolution:
"Small signal is particularly good,FY6600 can outputs1mVPP small signal, amplitude resolution is 1mV, and can be 1mVpp, 10mVpp, 100mVpp, 1Vpp and other different step value, the maximum range is 1mVpp~20Vpp electrodeless stepless regulation."
With a 12 bit DAC and 20v pk-pk max, DAC step size is 20v/(2**12) = 20v/4096 = 4.88mv,
so must have some sort of VGA after the DAC if it can generate an accurate sine wave that is 1mv pk-pk.

Would be interesting to pop one open, see what frequency the reference oscillator is operating at.
Should be possible to modify it to switch between the internal reference and an external
GPS disciplined reference coming in through an SMA connector on the back.
Though for most of us, the claimed 1ppm stability as originally built is good enough.

Jerry, KE7ER

On Wed, Apr 17, 2019 at 12:00 AM, Raj vu2zap wrote:
Correction, the 6600 does go down to 1mV steps. The 6800 goes down to 0.1mV steps.
6800 is a bit flakey to operate.

Re: Case

Sam Tedesco

@Jack,  where did you find the tuning dial?

Re: Audio hiss with random popping

Daniel Conklin <danconklin2@...>

OK, so I finally had time to open it up and have a look. Sorry for the delay. It turns out that the hissy, click audio was from the wires going from the AGC board to the volume pot. I have them connected using header pins. They had pulled loose and were almost falling off. When I pushed them back on firmly the problem went away  The mic click/pop is still there but reduced, so I think it's back to near normal.
73, Dan W2DLC

Re: Case

Fast hosts

Great case got mine from Banggood for less than £20... going to fit my 7inch screen in a sloping mount on top of the lid..

On Wed, 17 Apr 2019 at 16:30, Jack Purdum via Groups.Io <jjpurdum=yahoo.com@groups.io> wrote:
It does look nice and not much more expensive. Thanks for bringing it to my attention!

Jack, W8TEE

On Wednesday, April 17, 2019, 11:27:51 AM EDT, Dave Dixon <wylyeguy2@...> wrote:

Jack,
I am Dave G0AYD I have 3 of these boxes one houses my V3 and matching matching case housing my home brew  T match atu.I am currently building a digital swr/pwr meter so hope to house this in my other case.They are really good and sturdy the cost of post is nearly half the price of the box.but i brushed that aside once i had got the first one..BRILLIANT CASE, if you decide to buy one you wont be disappointed.Dave G0AYD FISTS 15892.CWOPS 2109 ROYAL SIGS 4209..GQRP 3309..

On Wed, 17 Apr 2019 at 15:46, Jack Brabham - KZ5A <kz5a@...> wrote:
I have one of those cases, the panels are all steel.  Really the whole case comes across as kind of "cheezy".   The cases  I am considering for my uBITX are a Cheval SA from Thailand or possibly the Circuit Specialist Instrument case.

The Cheval case is of better design and quality but you have cost and delays associated with shipping from Bangkok.  Also at the moment, they are closed for a National Holiday week.

The cases from https://amateurradiokits.in/ are pretty neat and are pre-punched and come with all the associated goodies.  The selections available vary from day to day,  so far they haven't had the "one" I liked best available.  I think these are an excellent bargain considering the goodies bag they came with.

73 Jack KZ5A

On 4/17/2019 5:30 AM, Lawrence Galea wrote:
Probably the copy and paste didn't work and the previous link was posted instead.
Here is the correct link and I checked it

https://www.banggood.com/250x190x110mm-Blue-Metal-Electronic-Enclosures-DIY-Power-Junction-Box-p-1067251.html?cur_warehouse=CN

Wishing everyone a happy Easter

On Tue, Apr 16, 2019 at 11:23 PM Jim <Jscook@...> wrote:
That is a good recipe. Have to try it. Grin

On Apr 16, 2019, at 5:11 PM, Karl Heinz Kremer, K5KHK <khk@...> wrote:

Is this a new form of rick rolling? ;) Or are you suggesting we should leave our radios turned off on Easter and to enjoy a sweet treat instead? Or, did you post the wrong link?

--
Karl Heinz - K5KHK

--
Keith Baker - Communications technician (retired)

Re: Case

Jack, W8TEE

It does look nice and not much more expensive. Thanks for bringing it to my attention!

Jack, W8TEE

On Wednesday, April 17, 2019, 11:27:51 AM EDT, Dave Dixon <wylyeguy2@...> wrote:

Jack,
I am Dave G0AYD I have 3 of these boxes one houses my V3 and matching matching case housing my home brew  T match atu.I am currently building a digital swr/pwr meter so hope to house this in my other case.They are really good and sturdy the cost of post is nearly half the price of the box.but i brushed that aside once i had got the first one..BRILLIANT CASE, if you decide to buy one you wont be disappointed.Dave G0AYD FISTS 15892.CWOPS 2109 ROYAL SIGS 4209..GQRP 3309..

On Wed, 17 Apr 2019 at 15:46, Jack Brabham - KZ5A <kz5a@...> wrote:
I have one of those cases, the panels are all steel.  Really the whole case comes across as kind of "cheezy".   The cases  I am considering for my uBITX are a Cheval SA from Thailand or possibly the Circuit Specialist Instrument case.

The Cheval case is of better design and quality but you have cost and delays associated with shipping from Bangkok.  Also at the moment, they are closed for a National Holiday week.

The cases from https://amateurradiokits.in/ are pretty neat and are pre-punched and come with all the associated goodies.  The selections available vary from day to day,  so far they haven't had the "one" I liked best available.  I think these are an excellent bargain considering the goodies bag they came with.

73 Jack KZ5A

On 4/17/2019 5:30 AM, Lawrence Galea wrote:
Probably the copy and paste didn't work and the previous link was posted instead.
Here is the correct link and I checked it

https://www.banggood.com/250x190x110mm-Blue-Metal-Electronic-Enclosures-DIY-Power-Junction-Box-p-1067251.html?cur_warehouse=CN

Wishing everyone a happy Easter

On Tue, Apr 16, 2019 at 11:23 PM Jim <Jscook@...> wrote:
That is a good recipe. Have to try it. Grin

On Apr 16, 2019, at 5:11 PM, Karl Heinz Kremer, K5KHK <khk@...> wrote:

Is this a new form of rick rolling? ;) Or are you suggesting we should leave our radios turned off on Easter and to enjoy a sweet treat instead? Or, did you post the wrong link?

--
Karl Heinz - K5KHK

Re: Case

Dave Dixon

Jack,
I am Dave G0AYD I have 3 of these boxes one houses my V3 and matching matching case housing my home brew  T match atu.I am currently building a digital swr/pwr meter so hope to house this in my other case.They are really good and sturdy the cost of post is nearly half the price of the box.but i brushed that aside once i had got the first one..BRILLIANT CASE, if you decide to buy one you wont be disappointed.Dave G0AYD FISTS 15892.CWOPS 2109 ROYAL SIGS 4209..GQRP 3309..

On Wed, 17 Apr 2019 at 15:46, Jack Brabham - KZ5A <kz5a@...> wrote:
I have one of those cases, the panels are all steel.  Really the whole case comes across as kind of "cheezy".   The cases  I am considering for my uBITX are a Cheval SA from Thailand or possibly the Circuit Specialist Instrument case.

The Cheval case is of better design and quality but you have cost and delays associated with shipping from Bangkok.  Also at the moment, they are closed for a National Holiday week.

The cases from https://amateurradiokits.in/ are pretty neat and are pre-punched and come with all the associated goodies.  The selections available vary from day to day,  so far they haven't had the "one" I liked best available.  I think these are an excellent bargain considering the goodies bag they came with.

73 Jack KZ5A

On 4/17/2019 5:30 AM, Lawrence Galea wrote:
Probably the copy and paste didn't work and the previous link was posted instead.
Here is the correct link and I checked it

https://www.banggood.com/250x190x110mm-Blue-Metal-Electronic-Enclosures-DIY-Power-Junction-Box-p-1067251.html?cur_warehouse=CN

Wishing everyone a happy Easter

On Tue, Apr 16, 2019 at 11:23 PM Jim <Jscook@...> wrote:
That is a good recipe. Have to try it. Grin

On Apr 16, 2019, at 5:11 PM, Karl Heinz Kremer, K5KHK <khk@...> wrote:

Is this a new form of rick rolling? ;) Or are you suggesting we should leave our radios turned off on Easter and to enjoy a sweet treat instead? Or, did you post the wrong link?

--
Karl Heinz - K5KHK

Re: N6DT AGC and S-meter

Ted

The firmware with the "S" is the right version to use with the intention of wiring to A7 for a meter, no?  That's kind of the point of the designation that way.

Re: N6DT AGC and S-meter

Joe Puma

Use a lm385 or whatever the part number is. Voltage op amp. I use the same AGC and could not use it for A7.

Go to KD8CEC site to get the info on build.

I’m blown away by his new projects. Swr meter, new software that will do FT8 and other modes. Oh my 😱.

Joe
KD2NFC

On Apr 16, 2019, at 10:16 PM, rickaputi via Groups.Io <rickaputi@...> wrote:

thanks, Tim!!  yes using the kit-projects AGC.  tried the direct connection but it did not work. using the correct version of the ubitx firmware, and the 2.4 tft for the nextion.  not sure why it is not working.  there are definitely the correct voltages coming from the s-meter take-off.  puzzled here.  Rick.

Re: Homebrew li-ion battery pack into ubitx

Bill Lamm

I have been looking at Drok's sight this morning.. love reading the reviews 😶  found this Drok buck boost that looks like I can set to 12.x volts out and either plug in a 13.5v PS in the shack or a lipo or whatever battery.. on or off solar panel and it will give me 12.x volts all day..   I am no ex-spurt so if any of you see something I am missing I welcome the wisdom..  for a start I am thinking or one and then if it pans out that sending more power to the finals is a good thing I would consider a second one..   my (up purpased) case has room, I am planning seperate fast acting fuses for the raduino (1.5a) and main board (2a or 3a)... still sorting through the polarity protection options but I have power pole connectors for the power connection on the case..

73
KD9MDL
Bill

Re: Homebrew li-ion battery pack into ubitx

Doug W

On Wed, Apr 17, 2019 at 09:38 AM, Doug W wrote:
I've used a knock off of this knock off for years  https://hobbyking.com/en_us/imax-b6-ac-dc-charger-5a-50w-with-us-plug-copy.html
Also worth mentioning, I charge and keep battery packs in an outbuilding away from anything flammable in a fire safe bag like this https://hobbyking.com/en_us/lithium-polymer-charge-pack-18x22cm-sack.html

--
www.bitxmap.com

Re: Case

Jack Brabham - KZ5A <kz5a@...>

I have one of those cases, the panels are all steel.  Really the whole case comes across as kind of "cheezy".   The cases  I am considering for my uBITX are a Cheval SA from Thailand or possibly the Circuit Specialist Instrument case.

The Cheval case is of better design and quality but you have cost and delays associated with shipping from Bangkok.  Also at the moment, they are closed for a National Holiday week.

The cases from https://amateurradiokits.in/ are pretty neat and are pre-punched and come with all the associated goodies.  The selections available vary from day to day,  so far they haven't had the "one" I liked best available.  I think these are an excellent bargain considering the goodies bag they came with.

73 Jack KZ5A

On 4/17/2019 5:30 AM, Lawrence Galea wrote:
Probably the copy and paste didn't work and the previous link was posted instead.
Here is the correct link and I checked it

https://www.banggood.com/250x190x110mm-Blue-Metal-Electronic-Enclosures-DIY-Power-Junction-Box-p-1067251.html?cur_warehouse=CN

Wishing everyone a happy Easter

On Tue, Apr 16, 2019 at 11:23 PM Jim <Jscook@...> wrote:
That is a good recipe. Have to try it. Grin

On Apr 16, 2019, at 5:11 PM, Karl Heinz Kremer, K5KHK <khk@...> wrote:

Is this a new form of rick rolling? ;) Or are you suggesting we should leave our radios turned off on Easter and to enjoy a sweet treat instead? Or, did you post the wrong link?

--
Karl Heinz - K5KHK

Re: Homebrew li-ion battery pack into ubitx

Doug W

On Tue, Apr 16, 2019 at 11:41 AM, Jerry Gaffke wrote:
Any recommendations on a suitable charger for this battery pack?
I've used a knock off of this knock off for years  https://hobbyking.com/en_us/imax-b6-ac-dc-charger-5a-50w-with-us-plug-copy.html

--
www.bitxmap.com

Re: Homebrew li-ion battery pack into ubitx

N1EDC

I also have a pack like the one KN6KB linked to, and it works great and is easier to use, but isn't really the best for building into a radio because of the power switch and unnecessary bulk, and you can't really cut out the power cable and replace with your own (like Power poles) unless you want to do a bit of surgery.

It works great as an external pack though!

For the Turning pack, I forgot to mention: you could always buy a ready-made balance charger if you want as well, but the buck converter and external balancer is more versatile for me.  It works great with solar panels, you can plug it into any wall wart of high enough voltage, or you could charge from your car battery on the go.

Re: Homebrew li-ion battery pack into ubitx

N1EDC

You can use any CC/CV charger set to the appropriate voltage and current settings.
I use a lot of the cheap dc-dc buck modules.

For the Turnigy pack, set the voltage to a hair under 12.6 and the current to 0.5A and connect to a DC source of 13.8V and it should charge just fine.  You can connect it directly to the discharge port.

As for balancing, I just plug one of these into the mini balance/charging plug every few charges.  It will drain the highest capacity cell slowly to balance the pack.  It doesn't need to be done every charge, but should be done periodically to maintain cell balance.

https://www.amazon.com/Turnigy-Battery-Display-Balancer-2S-6S/dp/B00USQXS1O/ref=mp_s_a_1_31?keywords=battery+balancer&qid=1555507626&s=gateway&sr=8-31

These will work with most any lipo battery pack, homebuilt or otherwise, as long as you have the right wire connections.

Re: N6DT AGC and S-meter

Steve MW0KST

Seem to remember I had a similar issue with the S meter. I think  it was the firmare I chose  - I’d mistakenly used the firmware with the “_S” in the filename.

 17241 - 17260 of 84565
More