开云体育

Hi,
While testing my frequency monitoring changes, I've been using FM (into a dummy load and a lightbulb, to reduce my noise on the air).
On 6m/50MHz, it tunes the lightbulb to about 1:1.3 which is OK, but it's using L4 (the first of the toroid ones), and at about 10W (FM), it gets really hot (100C+).
I guess it's one of the following:
1. It's a cheap from Chinese clone, and that toroid is duff.
2. I've cooked that toroid during testing and it's dead now
3. It's not rated to 50MHz, and that's causing a problem.

I've got some T68-6 on order (-6 is rated to 55MHz vs 40MHz of the -2), so will replace the two single cored ones. But wondering if going to T80-6 or T130-2 or T130-6 might help if it's saturating.
The -6 mix is only ur=8.5 not ur=10, so the windings change slightly (9.4/14 instead of 8.7/13), but shouldn't need any other changes.

I'd like to run FM/FT8 at 30...40W so any of the others I should be upgrading?

Thanks,
Roger.