Update: After making new jumpers and experimenting with lengths I noticed huge changes in the radio to amp SWR that I believe was the cause of the oscillation.
I went up to the antenna and cleaned up the connections on the speaker wire balun using bare butt connectors then shortened the feedline pigtail to the coax.
I havn't put the new balun up yet, because the SWR/oscillation issue dissapeared when I removed the meters, sampler and splitters, I'm also waiting on a SO crimp connector for the 400. It now measures a usable 1.5 or less for a span of 1.3mhz and gets better near the center. This is on the radios meter even with the amp on high.
Here's some pics of the old choke/balun (still in use) and the new one. I mounted it to wood and used a Jonnybolt kit (brass toilet bolts...lol) along with some copper washers and brass wingnuts so I can easily add or swap elements with crimped ring terminals for a multiband "fan" arrangement.
I went up to the antenna and cleaned up the connections on the speaker wire balun using bare butt connectors then shortened the feedline pigtail to the coax.
I havn't put the new balun up yet, because the SWR/oscillation issue dissapeared when I removed the meters, sampler and splitters, I'm also waiting on a SO crimp connector for the 400. It now measures a usable 1.5 or less for a span of 1.3mhz and gets better near the center. This is on the radios meter even with the amp on high.
Here's some pics of the old choke/balun (still in use) and the new one. I mounted it to wood and used a Jonnybolt kit (brass toilet bolts...lol) along with some copper washers and brass wingnuts so I can easily add or swap elements with crimped ring terminals for a multiband "fan" arrangement.
Attachments
Last edited:
