Or zero pots.? How's that for oversimplifying it?
Use this feature from Ian's post, firmware changes only to control transmit gain:
From? ?
/g/BITX20/message/50144? ? 2.ATT function has been added to reduce RF gain (Shift 45Mhz IF)
Courtesy of VK2ETA:
? ??
/g/BITX20/message/46235? ??
/g/BITX20/message/46241Another possibility:? A bunch of resistors in your antenna line to give a 3dB attenuator.
But your extra pots or front panel RF control could also be made to work, use coax.
I'd say that's way too complicated.? ;-)
Jerry, KE7ER
On Wed, May 23, 2018 at 11:41 am, Doug W wrote:
I have a feeling I am oversimplifying this.? It looks like Allison is getting closer to figuring out how to flatten the power output across all bands.? That is very exciting and a huge improvement.? However, it got me thinking.? Right now I am getting a little over 9w on 80m and about 8w on 40m.? Lately I have been spending time on 30m and 20m digital which both have an output under 5w keeping me in legit QRP range.? Let's assume Allison's project works and she shares it and I can figure it out.? To pick an arbitrary number let's also assume that my rig as an example post mod puts out a fairly even 9w across all bands.? That keeps us QRP for voice but not CW or data.? If I wanted to be able to switch back and forth is it feasible to connect two bias pots with a toggle switch and adjust one trimmer for 5w and one trimmer for 9w output?? For that matter what about 3 pots on a selector switch setting one more at 1w to drive an external amp?? As I ramble I wonder if you could also just bring the pot to the front panel and figure out a power meter but I like the idea of a set it and forget it switch.? Would this work or am I just exposing the gaps in my understanding?
