After reading through MANY threads, I have successfully recovered wallets. I mined and played way back when so lots of addresses. This is from a -dumpwithbalance output. Also did a recover option.
Questions:
The balance all say "Rate limited" - Any way I can correct that to show a balance?
Is there an efficient way to extract only the "sec: "<key>", from the text file and export just those keys to import into electrum?
Wallet created with recover will not load in to local qt bitcoin core (28.1) by the way, but a few test imports into electrum were successful.
"addr": "<addr>",
"balance": "Rate limited",
"compressed": false,
"encrypted_privkey": "7<privkey>",
"hexsec": "88<hex>",
"label": "recovered: 88<recover>",
"pubkey": "04f<pubkey>",
"reserve": 0,
"sec": "5Jr<sec>",
"secret": "88<secret>"