A while back a posted a query about Slinky antennas. I got several nice replies
for which I want to thank the senders.

Later I returned to this group only to find I had accidentally marked all the
threads as READ. Boy is my face RED.

Q: How can I undo this error? I bet I'm not the only one who has done it.

tnx es 73 de jack, K9CUN.