Piggie wrote: ... "But in the end I use CM baluns, except those included with Winegard antennas or such.
Why? I love the fact they are just wires. So many baluns fail where the wire goes into the spade to go under the nut or screw. It's the point of the highest mechanical stress, resulting in certain failure over time with the wire breaking right at the crimp on the spade.
So the CM doesn't have these. One top of that, if you play around and move them as I do, the wires are long enough if they do crystallize the metal to failure, you just strip them off and go again. You can't do this on other models, as the wires are must long enough (this also does reduce loss) but often the wires are stranded and about impossible to securely get again under a nut or screw.
Give me a CM with solid copper long leads."
Piggy, et al:
I'm new here as of today: I was invited (in a round-about-way) by EV. He and I have communicated a number of times on the AVS Forum.
Regarding baluns, I agree completely with you about the CM units compared to most others, however, they are made in China... The solid copper wires are FAR easier to work with unlike the ones that use twin-lead. Aaaack!
Question: has anyone compared baluns manufactured recently VS ones manufactured in the 1960s or '70s? I wonder if (at UHF frequencies) older baluns work at all, the same, or better than modern ones. Is there a significant design change for new ones to operate at higher frequencies? If so, I'll throw all of my old ones away (actually, I'll keep them as attenuators). Next, I know the wire in old baluns is copper, but what's inside the new ones? Just curious.
By the way, over the past summer I built 4 of my own 'cut-to-channel' Yagis for my home setup and I established 33 channels (and subs) so far, and I made my own baluns from RG-59.
I also tested a bunch of antennas at various elevations under and over my roof last summer: a loop antenna, first vertically and then horizontally polorized, a CM-4221, a CM-4228 (currently in use to receive a very low power translator (used to be 60 watts, recently upped)), an unknown origin small periodic Yagi, a strange corner reflector, and a second corner reflector I rebuilt (pretty much from scratch), now 'cut-to-31' that I have yet to try do to the weather change.
I also setup five others with outside antennas or complete antenna systems and all are as happy as the proverbial Washington State geoduck clam! Thanks in advance,
Jim In Seattle
My edit for EV: I just checked two CM baluns I recently purchased and both have solid copper wires with a 'white-metal' covering. Scratch one with a file or your pocket knife and see what you get.