开云体育

ctrl + shift + ? for shortcuts
© 2025 开云体育

Re: #QMX Tweeking QMX output power #qmx


 

Why? Nobody will know the difference, you are chasing unicorns, leave it as it is and use it.


On Wed, 23 Aug 2023, 19:18 Cliff, <ae5zaham@...> wrote:
I ended up adding a turn to the L513 toroid for 20-30M. Gave me an extra watt. Squeezing the turns helps some so figured adding the turn was going the right way. It may not always work that way depending on circuit values.

73,
Cliff, AE5ZA



On Aug 23, 2023, at 13:09, Randy <wrmoore47@...> wrote:

I'm getting a little over 4 watts into a dummy load on 80m and 60m. All other bands are 3.0w-3.5w. I would like to get all bands >=4.0 watts.? I've tried compressing and expanding all the low-pass filter torroids. Its difficult to get much movement out of the turns, and hardly any change in output power. For one thing, I guess I wind my torroids fairly tightly, and for another all the LPF torroids are squeezed onto the board such they all touch one or more other components and I can't get some turns moving around the contact with those components.

I probably should be happy with what I've got, but are there other tweeks I should be trying? If anyone has gotten higher output by tweeking the LPFs, let me know which ones and whether you compressed or expanded. Or if you added or removed turns.

73,
Randy, KS4L

Join [email protected] to automatically receive all group messages.