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Re: FrankenT41 on the air
¿ªÔÆÌåÓýOh yeah, BTW the PIN diode version of that TR board has additional inputs for RX antennas (up to 4) and the connections for the Auto Tuner.? That will really change things for use in in the field. ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? From: [email protected] <[email protected]> On Behalf Of rebruhnke via groups.io
Sent: Tuesday, February 25, 2025 12:31 PM To: [email protected] Subject: [SoftwareControlledHamRadio] FrankenT41 on the air ? Last evening, I finally got my version of the T41 on the air for an extended period of time on 75M. Talked all over the US and even down to British Honduras with my home brew amp running about 800W.? ? I call it the "Franken" T41 because the RF portion is not a T41. This is my FPGA implementation with a DSPic CK doing the actual demodulation/modulation.? Sensitivity is such that I can hear a -127dB signal; low, but it is there. On all bands the antennas generate way more noise than the rig. The FPGA splits the RF signal two ways: One set to a DAC for the panadapter and one set to the DSPic via I2S. Other than the panadapter signals, all analog "audio" is at high-level. No calibration is needed; the beauty of getting to digital as soon as possible. ? The UI is run by the Teensy using much of Al and Jack's code for noise reduction and equalization displaying on a 7" capacitance touch screen using an 8bit bus. The panadapter only displays +/- 48K as I like that display format the best. The display is not the ones used in the T41 as the capacitance touch "areas" of those displays are much larger than the one I am using and I need that resolution. No buttons on the front panel. Touch panel handles all "buttons" including band and mode changes. ? CW keying is crisp and the rise/fall times are handled totally via software in the DSPic. Built-in Iambic keyer. I'll get some internal pics up later today. ? I should receive a PCB today that has the Teensy in place of the DSPic...? Next project and we'll see how that goes. ? I am using Bill's BPF, LPF and control board. The control board is modified slightly to provide for a receive antenna so I can attach my Beverage. The BPF is only on the RX path as my transmitter is squeaky clean before the 100W PA. The PA board is one I got from Glenn, VK2PE many moons ago for another project. ? I want to thank Al and Jack for putting this out in the public domain and for Bill and Oliver doing the boards.? I get great compliments on the audio and the cleanliness of my signal. ? Russ NQ0U |
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Re: FrankenT41 on the air
¿ªÔÆÌåÓýYeah we need to talk.? You have more skill that I do in the FPGA department¡ where I want to go next. ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? From: [email protected] <[email protected]> On Behalf Of rebruhnke via groups.io
Sent: Tuesday, February 25, 2025 12:31 PM To: [email protected] Subject: [SoftwareControlledHamRadio] FrankenT41 on the air ? Last evening, I finally got my version of the T41 on the air for an extended period of time on 75M. Talked all over the US and even down to British Honduras with my home brew amp running about 800W.? ? I call it the "Franken" T41 because the RF portion is not a T41. This is my FPGA implementation with a DSPic CK doing the actual demodulation/modulation.? Sensitivity is such that I can hear a -127dB signal; low, but it is there. On all bands the antennas generate way more noise than the rig. The FPGA splits the RF signal two ways: One set to a DAC for the panadapter and one set to the DSPic via I2S. Other than the panadapter signals, all analog "audio" is at high-level. No calibration is needed; the beauty of getting to digital as soon as possible. ? The UI is run by the Teensy using much of Al and Jack's code for noise reduction and equalization displaying on a 7" capacitance touch screen using an 8bit bus. The panadapter only displays +/- 48K as I like that display format the best. The display is not the ones used in the T41 as the capacitance touch "areas" of those displays are much larger than the one I am using and I need that resolution. No buttons on the front panel. Touch panel handles all "buttons" including band and mode changes. ? CW keying is crisp and the rise/fall times are handled totally via software in the DSPic. Built-in Iambic keyer. I'll get some internal pics up later today. ? I should receive a PCB today that has the Teensy in place of the DSPic...? Next project and we'll see how that goes. ? I am using Bill's BPF, LPF and control board. The control board is modified slightly to provide for a receive antenna so I can attach my Beverage. The BPF is only on the RX path as my transmitter is squeaky clean before the 100W PA. The PA board is one I got from Glenn, VK2PE many moons ago for another project. ? I want to thank Al and Jack for putting this out in the public domain and for Bill and Oliver doing the boards.? I get great compliments on the audio and the cleanliness of my signal. ? Russ NQ0U |
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Re: V010 Boards
¿ªÔÆÌåÓýThe V10 radio still works¡ ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? From: [email protected] <[email protected]> On Behalf Of Greg KF5N via groups.io
Sent: Tuesday, February 25, 2025 10:06 AM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] V010 Boards ? Hi John- This is essential for a clean transmitter. You will need a 2nd LPF board and a set of filters from QRP labs. ? -- 73 Greg KF5N |
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Re: T41 SDT Version 66 with Calibration
¿ªÔÆÌåÓýV12.6 = V12.06 ¡ I think an extra zero crept into the mask¡ ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? From: [email protected] <[email protected]> On Behalf Of jjpurdum via groups.io
Sent: Tuesday, February 25, 2025 8:31 AM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] T41 SDT Version 66 with Calibration ? Maybe Bill can confirm this, but I think you're fine. ? Jack, W8TEE ? On Tuesday, February 25, 2025 at 09:08:18 AM EST, Steve Umans via groups.io <umans@...> wrote: ? ? On Mon, Feb 24, 2025 at 05:39 PM, Albert Peter wrote:
I received the V12 boards I am using back in June.? My Main board is labeled V12.6 while my RF board is labeled V12.06. I haven't seen any indication that there has been a new version of the RF board since then but I am checking just in case I need to order and re-populate an upgraded RF board. ? Tnx, Steve K8ZBE
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Re: slow starting on T41 kit
¿ªÔÆÌåÓýStill an option¡ ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? From: [email protected] <[email protected]> On Behalf Of jjpurdum via groups.io
Sent: Tuesday, February 25, 2025 8:17 AM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] slow starting on T41 kit ? Ron: ? I haven't ordered a display recently, but there was a 3.3-5.0V jumper on the back (J8) that let's me select between the two voltages. Maybe that's no longer an option? ? Jack, W8TEE ? On Tuesday, February 25, 2025 at 08:54:50 AM EST, Ron VE8RT <ve8rt@...> wrote: ? ? Everything has been ordered.? After reading the messages regarding display noise and 3.3 vs 5.0 volt options I ordered the 5.0 volt display. ? ? Ron VE8RT ? On Mon, 24 Feb 2025 06:40:59 -0700 "Ron VE8RT" <ve8rt@...> wrote: ? > Thank you, > >? ? I'll carry on, appreciate your saving me scanning over a year's of > posts to the lists to check for recommended changes since my kit > arrived. > >? ? So wishing that I was retired already, I'll be 70 this year.? Stuck > around because my boss won't hire an apprentice > or replacement, I'm one of the old guys with experience on his own > fleet plus the DC's, C-54 (retired now), L-188, and our fire fighting > fleet which includes CL-215s (piston ones from the 60's).? The next few > weeks is my break before fire season gets going again (not only > lightning, also re-animated zombie fires). > >? ? The required parts will be ordered this week. > >? ? 73? Ron VE8RT > > On Mon, 24 Feb 2025 13:26:39 +0000 (UTC) > "jjpurdum via groups.io" <jjpurdum@...> wrote: > > >? Your kit does not include the Teensy 4.1 or the Audio Hat, either (available from PJRC.com). The display is ordered from BuyDisplay.com and is a Chinese company so it will take some time. The correct model number is in the Files section of this site. > > Jack, W8TEE > >? ? On Sunday, February 23, 2025 at 11:20:41 PM EST, Ron VE8RT <ve8rt@...> wrote:? > >? > >? ? I was furtunate enough to received from Ron AG1P a T41 kit back in > > December of 2023.? The plan to get to it in early 2024 didn't work out, > > I've just this last week gone through the box and have a good start on > > the book.? > > > > ? Before I dive into building it are there modifications or other that > > I should do right away?? The 5 inch display and other not included in > > the box I should get on order ASAP.? Retirement should have happened in > > 2020, hopefully this later this year. > > > > ? Ron VE8RT > > > > -- > > Ron VE8RT <ve8rt@...> > > > > > > > > > > > >? > > > > > > > > > > > > > -- > Ron VE8RT <ve8rt@...> > > > > > ? ? -- Ron VE8RT <ve8rt@...> ? ? ? ? ?
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Re: T41 SDT Version 66 with Calibration
¿ªÔÆÌåÓýThose are the same. ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? From: [email protected] <[email protected]> On Behalf Of Steve Umans via groups.io
Sent: Tuesday, February 25, 2025 8:08 AM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] T41 SDT Version 66 with Calibration ? On Mon, Feb 24, 2025 at 05:39 PM, Albert Peter wrote:
I received the V12 boards I am using back in June.? My Main board is labeled V12.6 while my RF board is labeled V12.06. I haven't seen any indication that there has been a new version of the RF board since then but I am checking just in case I need to order and re-populate an upgraded RF board. ? Tnx, Steve K8ZBE
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Re: slow starting on T41 kit
¿ªÔÆÌåÓýThe big question is¡ can you make all of that work together?? As long as the audio and screen updates remain un-affected, we are good. ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? From: [email protected] <[email protected]> On Behalf Of jjpurdum via groups.io
Sent: Tuesday, February 25, 2025 7:53 AM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] slow starting on T41 kit ? The Teensy 4.1 will work if it has the ethernet connector, it just costs a little more. The audio hat is for the Teensy 4.0 or 4.1 is fine. ? Jack, W8TEE ? On Monday, February 24, 2025 at 11:17:24 PM EST, Ron VE8RT <ve8rt@...> wrote: ? ? Quick question before I pay for my order, I found a couple of audio
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Re: T41 SDT Version 66 with Calibration
The default is for the US. However, look in the INO file and you can find where to change these. Jack, W8TEE
On Tuesday, February 25, 2025 at 09:47:12 AM EST, bty84827531 via groups.io <roger.trett@...> wrote:
Thanks for the update.
?
I just completed the receive calibration in auto mode. It seems to work pretty well but it's not obvious when it completes other than that the figures stop changing much. Also it's not clear if auto mode uses the 0.001 increments. Maybe it does but the display shows 0.01 during the whole process. None the less the calibration produces a good result.
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On to transmit calibration next.
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Incidentally, the definition of 60M for Region 1 (Europe) is incorrect. This should be USB with band limits 5258500 and 5406500 (for UK) although these limits do vary depending on what country you are in.
?
Roger G8JWT
-- Jack, W8TEE |
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Re: V010 Boards
¿ªÔÆÌåÓýYep ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? From: [email protected] <[email protected]> On Behalf Of John Baines via groups.io
Sent: Tuesday, February 25, 2025 9:44 AM To: [email protected] Subject: [SoftwareControlledHamRadio] V010 Boards ? Hi all, ? I have a set of V010 boards and the original? ?issue of "Software Defined Radio Transceiver". ? If I build the boards in accordance with the book, will I get a functional radio? ? 73 John M0JBA |
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Re: T41 SDT Version 66 with Calibration
Maybe Bill can confirm this, but I think you're fine. Jack, W8TEE
On Tuesday, February 25, 2025 at 09:08:18 AM EST, Steve Umans via groups.io <umans@...> wrote:
On Mon, Feb 24, 2025 at 05:39 PM, Albert Peter wrote:
"We encourage everyone to upgrade to V12.6 Main and RF boards. The V12.6 performance is greatly enhanced" I received the V12 boards I am using back in June.? My Main board is labeled V12.6 while my RF board is labeled V12.06.
I haven't seen any indication that there has been a new version of the RF board since then but I am checking just in
case I need to order and re-populate an upgraded RF board.
?
Tnx,
Steve
K8ZBE
. -- Jack, W8TEE |
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Re: slow starting on T41 kit
Ron: I haven't ordered a display recently, but there was a 3.3-5.0V jumper on the back (J8) that let's me select between the two voltages. Maybe that's no longer an option? Jack, W8TEE
On Tuesday, February 25, 2025 at 08:54:50 AM EST, Ron VE8RT <ve8rt@...> wrote:
Everything has been ordered.? After reading the messages regarding display noise and 3.3 vs 5.0 volt options I ordered the 5.0 volt display. ? Ron VE8RT On Mon, 24 Feb 2025 06:40:59 -0700 "Ron VE8RT" <ve8rt@...> wrote: > Thank you, > >? ? I'll carry on, appreciate your saving me scanning over a year's of > posts to the lists to check for recommended changes since my kit > arrived. > >? ? So wishing that I was retired already, I'll be 70 this year.? Stuck > around because my boss www.buffaloairways.com won't hire an apprentice > or replacement, I'm one of the old guys with experience on his own > fleet plus the DC's, C-54 (retired now), L-188, and our fire fighting > fleet which includes CL-215s (piston ones from the 60's).? The next few > weeks is my break before fire season gets going again (not only > lightning, also re-animated zombie fires). > >? ? The required parts will be ordered this week. > >? ? 73? Ron VE8RT > > On Mon, 24 Feb 2025 13:26:39 +0000 (UTC) > "jjpurdum via groups.io" <jjpurdum@...> wrote: > > >? Your kit does not include the Teensy 4.1 or the Audio Hat, either (available from PJRC.com). The display is ordered from BuyDisplay.com and is a Chinese company so it will take some time. The correct model number is in the Files section of this site. > > Jack, W8TEE > >? ? On Sunday, February 23, 2025 at 11:20:41 PM EST, Ron VE8RT <ve8rt@...> wrote:? > >? > >? ? I was furtunate enough to received from Ron AG1P a T41 kit back in > > December of 2023.? The plan to get to it in early 2024 didn't work out, > > I've just this last week gone through the box and have a good start on > > the book.? > > > > ? Before I dive into building it are there modifications or other that > > I should do right away?? The 5 inch display and other not included in > > the box I should get on order ASAP.? Retirement should have happened in > > 2020, hopefully this later this year. > > > > ? Ron VE8RT > > > > -- > > Ron VE8RT <ve8rt@...> > > > > > > > > > > > >? > > > > > > > > > > > > > -- > Ron VE8RT <ve8rt@...> > > > > > -- Ron VE8RT <ve8rt@...> -- Jack, W8TEE |
K9HZ
jjpurdum