Indeed, none of us have any argument with that.
Batteries concentrate lots of energy in a very small space,?that makes them dangerous.
Safest to buy a complete battery system and charger that is
well reviewed and shows few failures, and then thoroughly read the documentation.
The alternative is, as you suggest, to make sure you know what you are doing
before proceeding.?

?

To renew, go to the ULS Home, select Online Filing, and follow the instructions below.

1. Login to the ULS License Manager with your FCC Registration Number (FRN).
2. From your License At A Glance page, choose the Renew link in the right hand menu called Work on this License. When your license is within the renewal period of 90 days before the expiration date until the expiration date, or within the 2 year grace period allowed there after the Renew link will appear. If your license is not eligible for renewal the link will not appear.
3. On the Select Updates page, review the licensee information displayed beneath the table of license information. If any of the data is missing or out of date you must update it. Click on the box to the left of the Licensee Information heading to insert a checkbox and select it.
4. When ready click Continue.
5. Answer the questions on the Applicant Questions page, and click Continue when ready.
6. On the Licensee Information page, review and update all of your licensee information. Make any corrections that are necessary.
7. On the Summary page review the information you have entered. If you wish to make additional changes, click the Edit button next to the section of your application you wish to Edit. You will be able to return to that page of the application. Make the desired change and select the Return to Summary button.
8. When ready to submit your update to the Commission, choose the Continue to Certify button.
9. After reading the certification, enter your first and last names in the boxes at the bottom of the page. You MUST sign the application. When finished choose the Submit Application button.
10. From the ULS Confirmation screen, we recommend you print a copy of your application and/or the Confirmation screen itself from your web browser.

Note: The address and contact information you have entered in CORES registration will not be automatically associated with your licenses. To change the address or other contact information on your license, you must update your information in ULS.

(Joe again here): When your renewal is ready to be processed, you will receive an email containing a link for you to pay the $35 fee. DO NOT use a smart phone to pay the fee, use a regular laptop or PC. There have been reports of issues with people using smart phones to pay the fee, so avoid that.?
Ok, I hope this helps, I'm sorry if it's complex, but I didn't create it and don't necessarily endorse it, it just "is what it is!"?
To summarize, if you haven't registered in the NEW CORES system, you need to. If you are within 90 days of expiration, you can renew by registering in CORES and then going to the ULS and following the instructions above.?
Thanks and Good Luck!?
73,
Joe
AA5AD

开云体育

• Use a pointer or screw driver to identify various resistors and capacitors.
• Create very close pictures illustrating the technique of transistor removal.
• Create very close pictures illustrating the technique of resistor/capacitor removal.
• Show T/R board in detail with mounting location(s) and wiring dress.
• Show RTC similarity.
• Show enclosure disassembly/assembly in multiple pictures.

Some addendums to my suggesting the use of a Gooloo 2000 for portable power.

First off, the reviews all suggest it does well for the intended purpose of starting?
a vehicle that has a low battery.? And that it is reasonably safe.

I just measured mine, it weights about 1.4 lbs, not the 3 lbs they give
as the shipping weight with packaging and accessories.

The Amazon webpage for it says it's a "2000 Amp Car Battery Jump Starter",
Lettering on the device says "500A(3s) 400A(5s) 2000A Peak".
Amazon price at $69.99 is suddenly cheaper than Walmart, that changed since yesterday.

They claim 19800 milliamp hours.
I would read that as 19800 mAh worth of 3.7 Volt cells,
so divide by four and it is roughly 5 Amp-hours at 3.7*4=14.8 Volts.
This is typical of all the other auto jump start devices, they all have to play
the same game or they lose their mostly naive customers.
The Gooloo also says it is 73 Watt-hours, which checks since 73Wh/14.8V = 4.93 Amp-hours.

It does have a port on it with lettering that says "15V 10A", I haven't yet used it.
That port has a standard 5.5mm coaxial power connector with a 2.1mm pin.
Nice that it's a standard connector, but those are?typically rated for a max of 5 Amps.
If you want much more current than that, perhaps best off using the provided
jump cable and appropriate fusing.?
Output voltage will typically be between 15 and 12 VDC depending on charge state.

Not bad.
73 Watt-hours means you could run a rig drawing 10 Watts continuously
for 7.3 hours.? ?Adequate for most ham QRP outings.
Or a rig drawing 400*12=4800 Watts for 5 seconds, at which point the battery would overheat and shut down.
Or maybe start your car some dark night.

That 10 Ah Lumenier that Don pointed to has almost exactly twice the claimed capacity,
? ? 10 Ah at 14.8 Volts would be 148 Watt-hours.
The Lumenier is also double the price, and that does not include a proper charger with BMS for it.
However, the Lumenier should run a 3700 Watt rig for 2.4 minutes, which could actually be useful.
And might start a small car in a pinch, though be careful as it probably doesn't have overcurrent protection.

Jerry, KE7ER