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I agree with Reid –
Get a bunch into circulation and folks will find a way to address them.
I am in for 2 or 3 of the IO board if a group buy gains traction. Would prefer assembled if a choice.
Tom, K2TC
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On the HL2 Facebook page, I saw a post about an IO board build. It was designed by the same man as the filter board. Seems that it may go to Makerfabs for production.Here is the Github:Should I be interested? Seems that for it's publicized features, there would not be a need of a Gateware change?What say ye?
Ed
Count another for the IO board.Dave K1FSY
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1 Would you be willing to design a rear plate for the HL2 enclosure? If it had another serial output & maybe a few more varoius ports above the plane of your board, that may allow for more options in the future, or to use the multiple outputs that you have.
2. The blank square area on the board, could that be made into a perf board area? I was thinking about adding an IC that will siwtch 12VDC+ for controlling a TS-440 PA & LPF for 100W, along with a dual MRF 157 pallet for 1KW. Not sure if it is feasible for that blank area, or not, but just an idea.
3. Would the test sequence in Main.C be enough to ensure proper function in all of your patterned circumstances?
4. This is the Biggie. As I am not good at this stuff, would you be willing to give technical support for this on the Google HL-2 board?
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On the HL2 Facebook page, I saw a post about an IO board build. It was designed by the same man as the filter board. Seems that it may go to Makerfabs for production.Here is the Github:Should I be interested? Seems that for it's publicized features, there would not be a need of a Gateware change?What say ye?
Ed
Hi,
please add me to the list, I would purchase two of these boards.
73 Stelio
OK, I am not actually making a list. It is good to get a count, though. This will be just like purchasing an HL2 or filter board. You will order directly through Makerfabs.My count is now 82 total.Please keep the interest up && post how many you want, as it will help for the decision on how many to produce.
Thank you,Ed GraftonWA4SIX
On Saturday, March 4, 2023 at 5:25:16 PM UTC-5 radi...@mail.com wrote:
I would purchase two of these boards if available on Makerfabs primarily for switching bands/filters on my LDMOS amp but also potentially for auto-switching my coaxial relays to auto change transverters. Seems will avoid the need for an external band decoder to do the same job? Also nice to have RF3 brought out to back panel as standard for use with my transverters. Maybe possibly the fan control although I've never really seen the need for a fan in the HL2.73Max
On Saturday, 4 March 2023 at 16:20:57 UTC rune....@gmail.com wrote:
Hi All
Interesting, please add me to the list, I will purchase one I/O board.
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Since the HL2 can read and write the I2C bus to communicate with the IO board, it would be possible for SDR software authors (Quisk, Spark, Power SDR, etc.) to write extensive logic to control IO. This is NOT the desired result. Instead users should write new firmware to provide the services they require. It is easy to write firmware for the Pico. Ideally, an owner of a given power amp, for example HR50, would write a custom firmware and provide a wiring diagram for that amp. The only required SDR modification is sending the transmit frequency. The transmit frequency can be read by HamLib CAT in case an external helper program is used.
Do NOT ask authors to modify SDR software! Write new firmware instead!
Transmit FrequencySDR software must send the transmit frequency to provide band information to power amps, transverters and loop antennas. You can wait for the band to change, and then just send a frequency in the band. For example, if the user presses the 40 meter button, send 7.0 MHz. This is enough to determine the band, but not enough to tune a loop antenna. You can send the exact Tx frequency, but since the user is probably doing a lot of tuning, it is best to limit the I2C traffic. Quisk sends the Tx frequency at maximum rate of once every 0.5 seconds, and only if it changes. The frequency data in registers 0, 1, 2 and 3 are static, and are only used when register 13 is written. So you don't need to re-send them unless they change. Quisk makes no use of this, and always sends all five registers.
RF Receive InputThe mode control 0, 1 or 2 is a user setting. There needs to be an option to set this. Quisk has this option.
From the above, I think that reading the I2c for ID of the board & allowing frequency to come over I2c are needed for bandswitching. 0,1,2 in Mode control are provided in the Pico firmware to control the RX/PS inputs.
To me, this means that just these basic alterations to their code will make the board perform as advertized.
Please feel free to give suggestions, as I am just trying to get this project underway. I also do not know the big players on the board. I only have 1 possible volunteer for testing, as of yet.
Ed
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I have been thinking about this today. If the holes are any traditional socket spacing, is there enough height under the cover to allow plugs into them?