Sounds like a call to technical support. Sorry

I use a reel type external antenna. Several to choose from on Amazon. You'll need to use the small alligator clip to connect it to the collapsible antenna. Not sure about an LNA. Cheers.

There are a couple of minor differences. As I remember the 500 will take normal alkaline batteries. The 500L has only a rechargeable but bigger solar connector. It depends on what is important to you. I keep mine in my RV and use it when camping so using solar tipped the scale for me. At home, probably little difference.

@@GadgetTalk4U So the 500 ways of power are regular batteries, crank, & the smaller solar panel (even though it's probably not great) ?? .. And the 500L has the bigger solar panel, crank, and ONLY a rechargeable battery? .. Can't put in regular AA's in it?

@@CasonovaCorkClub The 500 can be powered by AA batteries, a small rechargeable battery charged by solar or crank, ac adapter or a phone style power bank with a USB cable.. The 500L does not take AA batteries. Download the 500 user guide from the Amazon sales page for more detailed info. Both are nice radios.

@@GadgetTalk4U Can you charge the 500L Rechargeable battery in a outlet???

@@CasonovaCorkClub via USB.

Correct. The L model doesn't use AAA or AA batteries.