I disagree, because the box contains any heat produced in the choke, reducing the dissipation of that heat to the outside air, thus reducing the power handling of the choke. The reason for bonding co
With a heat source fed a constant quantity of energy (more or less a balun under test if not actual use) its temp will rise until the temperature is sufficiently above ambient for the delta temp to d
I also have trouble contemplating having a big wad of heavy cores hanging from the driven element of a large Yagi where the driven element may be 30 feet or more from the mast. Reading K9YC material
Array Solutions mounts their choke in a small plastic Nema junction box. They use small Teflon coax and I believe it is around a single core in some of their models. DX Engineering mounts their choke
On 11/4/14, 5:38 AM, john@kk9a.com wrote: Array Solutions mounts their choke in a small plastic Nema junction box. They use small Teflon coax and I believe it is around a single core in some of their
Array Solutions mounts their choke in a small plastic Nema junction box. They use small Teflon coax and I believe it is around a single core in some of their models. DX Engineering mounts their choke
a loooong time ago. Nobody was doing proper Z measurements back then. Jr used type 61....and Chuck used type 43. On wire dipoles, the coax /ferrite chokes could be better optimized for that one band
There is no RG-393 inside my Array Solutions or Cal-Av Baluns. Perhaps you are using 10,000+ watt versions? John KK9A Array Solutions mounts their choke in a small plastic Nema junction box. They use
Exactly, there is no problem with overheating on a yagi. I use 12 windings of RG141 on a 61 mix toroid on 40m and less on the higher bands when not winding the feed line to a solenoid. All mine are o
There is no RG-393 inside my Array Solutions or Cal-Av Baluns. Perhaps you are using 10,000+ watt versions? John KK9A EB-3 bead baluns. Array solutions rates their box at 10-20 kw.... which I find ha
I've read Jim's choke cookbook, and I won't pretend to say I understand all (maybe even any) of the math involved. However, I can't escape the feeling you both reading too much into his design of an
At your local big box store they sell PVC door stop molding which makes for great building blocks. I put two small cut pieces of these together and zip tied/taped them to the boom to provide a spacer
Forgot to add that this PVC glues together just fine with ordinary PVC plumbing cement. jim ab3cv _______________________________________________ _______________________________________________ Tower
Hi Jim Been following this thread with considerable interest. However, I can't figure out what you're doing here. What is door stop molding and what problem is it solving for you? Construction materi
PV door stop moulding is just trim used typically for replacing rotted exterior trim around garage doors. PVC is pretty impervious to weather. I painted mine black after putting it up for better stea