I've been getting all kinds of advice from everyone wherever I
posted this question and I really appreciate everyone's replies but I guess
I wasn't too clear on my needs. I
shouldn't have even mentioned the blowtorch as it really isn't a problem.
IF I was at home during the day and wanted to listen to the shortwave, it
would be a MAJOR problem. Alas, I work for a living and am not home during
the day. I just mentioned that. Why, I'm not sure. What I was REALLY
wanting to know was if a preselector would help with blocking spurious
signals and images out of my older tube single conversion radios. Nothing to
do with the blowtorch. He isn't a problem in the evening after they turn
down the power. Again, I appreciate everyone's comments. I am learning
more than I could have hoped to.