Jim Heath W6LG shows a new soldering gun that was very inexpensive. There is a newer version that is perhaps an improvement over the one that Jim shows. Here are only a few of the sources. You may be able to find more.

https://www.ebay.com/itm/266590443410...

https://www.ebay.com/itm/235117468227...

https://www.ebay.com/itm/134514535894...

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You can see Jim W6LG as a cohost, health permitting, on Amateur Radio Roundtable every Tues night on w5kub.com at 2100Eastern, 2000Central, 1800Pacific and 0200z. You can see more information about Tom Medlin and the others by going to W5KUB.com.