General > General Technical Chat
How hard can it be to find a 9,8V, 75W PSU?
oh2ftu:
The -104 can be internally adjusted 8-11V. -105 can be adjusted from 11-13V.
Too bad the 105 I have are without remote sense :-(
Siwastaja:
What is a "bank charger" and why it requires extremely well regulated voltage to the point where wiring resistance is a problem? Chargers usually, by definition, do their own voltage and current regulation.
Sounds to me like this "bank charger" is a problem and should be replaced with something suitable, but first I'd like to know what it supposedly does, being such special snowflake. Or maybe the voltage accuracy requirement is just an assumption, not a fact?
madires:
Take the next best 12V power brick and modify the voltage divider for the feedback?
bw2341:
If it really is for use by normal people, I would buy the original power supply from an official seller of the radio system. The inflated price would be worth it to me to avoid any liability for safety issues.
I found some pictures of the Powersolve PSE65-9V8 from an online seller. It looks like a 9.8V 7.65A DC power supply with a 4-pin Power DIN connector (Kycon KPXJ?) with remote sense connections.
The Powersolve website doesn't seem to mention this series of power supply. Maybe it's been discontinued? Sinpro SPU65-104 seem to refer a series and a voltage range and is not specific enough to identify an exact connector. The series datasheet does not mention remote sense at all.
If I had to solve this problem for my own personal use, I would open up the radio charger to figure out the charging circuit. The DC input is likely connected to a charge controller chip or voltage regulator so I would figure out the acceptable voltage range and whether or not the remote sense is necessary.
oh2ftu:
Hello,
The radio charger in question is a Sepura 300-384.
It includes a power distribution board (no regulators identified) that distribute power to six individual pcb's, each capable of charging a radio and battery simultaneously.
The radio receives the input power directly, and the radio manual states the following:
* Charging voltage range: Vchgmin = 9,3V Vchgmax = 9.7V
* Absolute maximun transient voltage: Vchgmax = 13,5V (must not exceed 10us in duration e.g. under hot insertion or mains switch on conditions)The power supply (and charger for that matter) is NLA. Also, all charger internal boards are from Powersolve.
Attached are some pictures
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