Don't sell yourself short, Frank: we hams can sometimes contribute
on this list.
It's a fuzzy faced young engineer or academic who remains confident
that he has nothing to learn from a genuine ham of long and diverse
experience. Not all of us are simply warmed over chicken banders. Some
of us have ended up embarrassing engineers.
Please continue to contribute.
John
at radio station VE7AOV.
On 2019-09-27 5:00 a.m., Frank Dinger , EI7KS wrote:
Yes ,indeed a 5V USB powerpack ,readily available ,even from supermarkets , will do fine.
For those needing a Li-Ion cell (nominally 3.7V) , I get these from discarded Laptop battery packs . These packs are discarded because usually only 1 of the 6 cells is no longer OK.
I take these packs to bits and charge each cell individually with an appropriate charger (usually good for charging 4 cells at the time) I then fit cells in 18650 cell holders available from Banggood and other on-line retailers.
There are 2 types of cell holders , for 1 cell and 4 cells.
WIth the cell holders I make multiple cell battery packs to feed my Yaesu FT-817 , QRP transceiver
For this transceiver I use 4 multiple cell units in series ,ensuring that the cells will be re-charged when the radio input voltage has dropped to 4*2.8V=11.2V To ensure a long life a Li-Ion cell should not be discharged below 2.8 V
The above just for info.
After all I am just a radio AMATEUR.
Frank , EI7KS
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