Re: Fixing the galloping VFO problem
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College Professor Simon Thompson
Are you an engineer by training or by avocation??
Good luck with your talk, and I look forward to seeing how you have accomplished your ¡°facelift¡± goal.
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On Mar 23, 2017, at 7:56 AM, Jack Purdum via Groups.Io < econjack@...> wrote:
Hi Simon:
Sure. I am presenting the talk "Give Your QRP Rig a Facelift" at the FDIM conference just before the Dayton hamfest. I should have a working Beta version there for the talk. Everything will be Open Source for anyone who wants to use it.
Jack, W8TEE
Hi Jack
I cannot wait to see the final product! The screen looks great, and I am sure your hardware and software additions will make the Bitx40 more flexible. Can you let us all know when you get the work complete? On Mar 22, 2017, at 8:44 PM, Jack Purdum via Groups.Io < econjack@...> wrote:
I agree, it does look like an uppercase 'I', which is why I always use an uppercase 'L' instead of a lowercase 'l'. Indeed, I'm not even sure the code would compile with an uppercase 'I'.?
As to my unit not being assembled, that's actually not quite correct. I did have it assembled some time ago and it worked as specified. However, I prefer a more conventional tuning method and a better display. So, I've added the TFT display (see picture) and a custom PCB that holds the display and a Mega 2560 Pro Mini. I needed the larger uC because of the graphics. Dennis (W6DQ) and I are working on adding an RF-chain AGC, which will also drive the S meter (RF, not audio), CW mode, a capacitive touch keyer so you don't need to drag a set of paddles along on a SOTA trip, a rotary encoder for tuning and the menuing system you see in the picture. I've added 3 NO pushbutton switches on the case which at tied to the 3 menu boxes at the top of the display. If you look, you will see that SW1-SW3 are currently tied to messages 1-3. The first message is shown at the bottom of the screen (MSG: CQ...). So, when you press switch 1, the xmtr sends the CQ message. The user can select from 50 different messages at runtime. It also monitors input (battery) voltage. The keyer is currently set for 15WPM and, the last field on the display, shows that, if you are operating a 7.024MHz, you are in the CW segment for the Extra class license. Everything on the screen can be changed at runtime via the menuing system.
Another complicating factor in reassembling the rig was the tornado that went through Cincinnati two weeks ago leaving my workshop with 6" of water in it. So, next time you want to take a swing at me, walk in my shoes for a few steps first.
Jack, W8TEE
From:?John Smith via Groups.Io < johnlinux77@...> To:?[email protected]?Sent:?Wednesday, March 22, 2017 11:26 PM Subject:?Re: [BITX20] Fixing the galloping VFO problem Alright then. "I" thought it looked like an i.? But it's just the numbers I changed to get the results. If you ever get yours assembled, you might like it.
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