Modification of the Radioditty charger with "TP5100" card at $ 2.

User avatar
F1CXG
Posts: 164
Joined: Sat Nov 16, 2019 7:24 am
Location: GRENOBLE (France)

Re: Modification of the Radioditty charger with "TP5100" card at $ 2.

Post by F1CXG » Mon Apr 27, 2020 11:48 am

"Harcourt Studio" look :)
73 de Thierry ;)

Juan Francisco
Posts: 20
Joined: Sat May 09, 2020 4:00 pm

Re: Modification of the Radioditty charger with "TP5100" card at $ 2.

Post by Juan Francisco » Thu May 21, 2020 11:51 pm

you can take advantage of the components of the old board ??? the TP5100 only without filters etc emits noise in the radio if it is connected while charging? Thank you

kt4lh
Posts: 138
Joined: Sun Jan 12, 2020 4:27 am

Re: Modification of the Radioditty charger with "TP5100" card at $ 2.

Post by kt4lh » Sat May 23, 2020 2:06 pm

Juan Francisco wrote:
Thu May 21, 2020 11:51 pm
you can take advantage of the components of the old board ??? the TP5100 only without filters etc emits noise in the radio if it is connected while charging? Thank you
The modification that's on http://members.optuszoo.com.au/jason.re ... 77mods.htm and in this thread in a few variations replaces the entire charger circuit with a TP5100 module, leaving the charger base and battery contacts but everything else is replaced.

I've heard the TP5100 is RF quieter than the original charger, although I do find mine pretty noisy on VHF. It desenses VHF radios on the desk, although a very small radius, like maybe 18 inches. If I put the HT on the other side of the desk it's fine. The coil and cap in this thread are to improve the RFI, but they aren't 100% necessary. You can do it as simple as just dropping in the TP5100. Less RFI is always better, however!

Overall the TP5100 is a much better charger. The original charger has been shown to overcharge batteries, is very slow, and uses that terrible 12v USB input.

Juan Francisco
Posts: 20
Joined: Sat May 09, 2020 4:00 pm

Re: Modification of the Radioditty charger with "TP5100" card at $ 2.

Post by Juan Francisco » Mon May 25, 2020 10:32 pm

I have just installed the tp5100 but in output it gives me 8.3 volt Is it normal? Or should I give 8.4?

If I use the original charger of only 500ma, will the battery charge well? Obviously it will slow it down. My intention is to have an original 500ma charger for the night and 12v 2a for the day and thus have 1 amp of charge.

** The main reason for switching to tp5100 has been not only the possibility of charging in half the time, I am also looking for stability in the load with the taste value and the taste cut in voltage , I also understand that after cutting if the voltage drops to 8.2 it returns to load to leave at 8.4 (8.3 in my case)

kt4lh
Posts: 138
Joined: Sun Jan 12, 2020 4:27 am

Re: Modification of the Radioditty charger with "TP5100" card at $ 2.

Post by kt4lh » Tue May 26, 2020 1:36 am

Juan Francisco wrote:
Mon May 25, 2020 10:32 pm
I have just installed the tp5100 but in output it gives me 8.3 volt Is it normal? Or should I give 8.4?

If I use the original charger of only 500ma, will the battery charge well? Obviously it will slow it down. My intention is to have an original 500ma charger for the night and 12v 2a for the day and thus have 1 amp of charge.

** The main reason for switching to tp5100 has been not only the possibility of charging in half the time, I am also looking for stability in the load with the taste value and the taste cut in voltage , I also understand that after cutting if the voltage drops to 8.2 it returns to load to leave at 8.4 (8.3 in my case)
No, you need to feed it with a proper power supply. You don't have a 12V desk PSU there for other radios etc? And no, leave the voltage alone, the TP5100 is pretty well designed, and much better than the stock charger circuit that overcharges.

Juan Francisco
Posts: 20
Joined: Sat May 09, 2020 4:00 pm

Re: Modification of the Radioditty charger with "TP5100" card at $ 2.

Post by Juan Francisco » Tue May 26, 2020 10:54 am

I have a source from a charger liitokala 500 that gives 12.5volt and 2amper. Something that if I have won is to avoid the annoying noise that is generated when the battery 100% is above 8.3 + -volt (it generated a small hum the amplifier) . Thank you

kt4lh
Posts: 138
Joined: Sun Jan 12, 2020 4:27 am

Re: Modification of the Radioditty charger with "TP5100" card at $ 2.

Post by kt4lh » Tue May 26, 2020 12:21 pm

Juan Francisco wrote:
Tue May 26, 2020 10:54 am
I have a source from a charger liitokala 500 that gives 12.5volt and 2amper. Something that if I have won is to avoid the annoying noise that is generated when the battery 100% is above 8.3 + -volt (it generated a small hum the amplifier) . Thank you
Sounds like you have this issue, which some do. Mine doesn't, not sure if it's because it's newer, or older, or luck. Look for "Soft audio squeal at low volume" on this page: http://members.optuszoo.com.au/jason.re ... 77mods.htm

Juan Francisco
Posts: 20
Joined: Sat May 09, 2020 4:00 pm

Re: Modification of the Radioditty charger with "TP5100" card at $ 2.

Post by Juan Francisco » Tue May 26, 2020 9:30 pm

kt4lh wrote:
Tue May 26, 2020 12:21 pm
Juan Francisco wrote:
Tue May 26, 2020 10:54 am
I have a source from a charger liitokala 500 that gives 12.5volt and 2amper. Something that if I have won is to avoid the annoying noise that is generated when the battery 100% is above 8.3 + -volt (it generated a small hum the amplifier) . Thank you
Sounds like you have this issue, which some do. Mine doesn't, not sure if it's because it's newer, or older, or luck. Look for "Soft audio squeal at low volume" on this page: http://members.optuszoo.com.au/jason.re ... 77mods.htm
Exactly I think why it is of the first models since it is from 2017 if I remember correctly but it is as if it was new since I stopped using it because I did not like its firmware until I discovered the wonderful openDG77;) .. has a solution with a resistance but I think it is something risky and delicate. With the 8.3 load there is no problem. Thank you

**I edit: I observed that the charger stops charging at 8.3 and then if the voltage drops below 8.2 it starts charging again .. if the battery has example 8.25 it does not charge if it does not drop less than 8.2 + - .. Curious detail of this loading module.

Juan Francisco
Posts: 20
Joined: Sat May 09, 2020 4:00 pm

Re: Modification of the Radioditty charger with "TP5100" card at $ 2.

Post by Juan Francisco » Sun May 31, 2020 10:04 pm

I put the new tp15100 module with the original 500mAh charger of the radioddity DG-77 and my surprise charges in only 3 hours, before with the original cpb it took 6 hours + - . From which I deduce that that original PCB or board absorbed part of the energy or limited it.

Post Reply