Re: uBitx V3 low power continues
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as and when time permits take a photo of the Post PA LPF sections. you would locate the LPF covering 40m band.
check the turns of coils L17, L18 and l19.
Cross check with ft37-43 core on site calculator at kits and parts. you will find that it might be having additional turns.
we can remove coils from top itself no need to pull board out. try to tweak the coils by reducing and measuring, if possible.
The power on 40m would come up.
perhaps one could try increasing the local VFO , intermediate and BFO osc levels. by manipulating the code in si5351 firmware.
they are set at 2mA by defining 1, 1, 1 for clocks 0, 1 and 2
we can perhaps try with 2, 2, 2 instead.
notice that on v5 the designer had made it 3, 3, 3
we can always restore them to old levels by a click of button on arduino ide.
all the best for a speedy recovery from spinal issues.
On Thu, Oct 31, 2019 at 12:13 AM Ted via Groups.Io <firstname.lastname@example.org> wrote:
This is a follow-up to another thread that is months old. I'm now recovering from cervical spine surgery & attendant complications of infection, so I've had time to repeat tests though not necessarily any clearer mind. Having only 15-20 degrees of rotation of my neck isn't helping, either, with bench work.