Here and here:
https://github.com/DRWJSCHMIDT/T41/tree/main/T41_V012_Files/T41_V012_Gerbers
https://github.com/DRWJSCHMIDT/K9HZ/tree/main/K9HZ_LPF_Module/K9HZ_LPF_V1.00_Gerbers
-------- Original Message -------- On 4/5/25 7:31 AM, John Owens K1JO via groups.io wrote: Are the gerbers available for doing this for the version 12.6 boards?
|
Are the gerbers available for doing this for the version 12.6 boards?
|
Re: Updated (and final) Version of T41 book
Great, just let me know how much and how to pay.
Robert Luken
1450 Lester Court
Merritt Island, Fl 32952
On 4/4/2025 3:36 PM, Jack, W8TEE via
groups.io wrote:
Sure, we'd just have to add
the shipping charge to the cost of the book.
Jack, W8TEE
On Friday, April 4, 2025 at 12:19:19 PM EDT, Robert
Luken W3RDL via groups.io
<now.w3rdl@...> wrote:
Jack, is there a way to get an autographed copy of
Version 4, since I can't make it to the FDIM
conference?
On
4/4/2025 10:53 AM, Jack, W8TEE via groups.io
wrote:
All:
Al and I have
just updated the 3rd edition T41
book. We moved the calibration info from
Appendix C to its own chapter (20). The
expanded instructions and new software make
T41 calibration much easier. We have also
updated the narrative in numerous places and
have concentrated discussions on the V12.6
release where those changes are important.
Some of you are
asking yourself: Do I need to buy this
update. Truthfully, if you already own the 3rd
edition, we would say no. Most of the
important changes are discussed on the web
site and photos and schematics are available
there, too.
On the other
hand, this is the last change we will be
making to this book. Al and I have been at
this for almost 7 years now and we're
getting a little burned out. For that
reason, we are turning this site over to
Oliver King, KI3P, and Dr. Bill Schmidt,
K9HZ. Al and I will continue to be active
relative to the T41, but will leave the
details to Oliver and Bill.
If you do want
the final version of the book, its new cover
looks like this:
The book is actually available now, but
the Amazon ad will not reflect the new cover
for about 10 more days. (If you order now,
it will be the new version.) If you are
attending the FDIM conference this May
(coincides with Dayton Hamvention and the
conference hotel is about 10 miles away), Al
and I will be selling autographed copies on
Thursday night (May 15th) at the
conference hotel starting around 8PM. We
have reduced the price of the autographed
copies from $12,500 to $40...which is a deal
and less than the Amazon price! If you have
a previous copy of the book, bring it along
and we will be happy to sign it.
This has been a
fun project and we want to thanks the
hundreds of people have contributed to its
improvement over time. We hope that
continues long after Al and I are gone.
72,
Jack Purdum,
W8TEE
Al Peter, AC8GY
--
Jack, W8TEE
--
--
Jack, W8TEE
--
73
Bob W3RDL
|
Re: Updated (and final) Version of T41 book
Sure, we'd just have to add the shipping charge to the cost of the book.
Jack, W8TEE
On Friday, April 4, 2025 at 12:19:19 PM EDT, Robert Luken W3RDL via groups.io <now.w3rdl@...> wrote:
Jack, is there a way to get an autographed copy of Version 4,
since I can't make it to the FDIM conference?
On 4/4/2025 10:53 AM, Jack, W8TEE via
groups.io wrote:
All:
Al and I have just updated the
3rd
edition T41 book. We moved the calibration info from
Appendix C to
its own chapter (20). The expanded instructions and new
software make
T41 calibration much easier. We have also updated the
narrative in
numerous places and have concentrated discussions on the
V12.6
release where those changes are important.
Some of you are asking
yourself: Do I
need to buy this update. Truthfully, if you already own
the 3rd
edition, we would say no. Most of the important changes
are discussed
on the web site and photos and schematics are available
there, too.
On the other hand, this is the
last
change we will be making to this book. Al and I have been
at this for
almost 7 years now and we're getting a little burned out.
For that
reason, we are turning this site over to Oliver King,
KI3P, and Dr.
Bill Schmidt, K9HZ. Al and I will continue to be active
relative to
the T41, but will leave the details to Oliver and Bill.
If you do want the final
version of the
book, its new cover looks like this:
The book is actually available now, but
the Amazon ad will not reflect the new cover for about 10
more days.
(If you order now, it will be the new version.) If you are
attending
the FDIM conference this May (coincides with Dayton
Hamvention and
the conference hotel is about 10 miles away), Al and I
will be
selling autographed copies on Thursday night (May 15th)
at
the conference hotel starting around 8PM. We have reduced
the price
of the autographed copies from $12,500 to $40...which is a
deal and
less than the Amazon price! If you have a previous copy of
the book,
bring it along and we will be happy to sign it.
This has been a fun project
and
we want to thanks the hundreds of people have contributed
to its improvement over time. We
hope that continues long after Al and I are gone.
72,
Jack Purdum, W8TEE
Al Peter, AC8GY
--
Jack, W8TEE
--
73
Bob W3RDL
-- Jack, W8TEE
|
Re: Updated (and final) Version of T41 book
Our booth at Hamvention is inside this year… 4111 in building 4. ?You can buy the lasted and greatest T41 boards and kits along with everything else I sell there. ?Plus we will be advertising the contest station for rent. ??
My wife was tired of being out in the rain and the smell of the porto-pottys in the outfield. ?
Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com
email:??bill@... ?
toggle quoted message
Show quoted text
On Apr 4, 2025, at 12:33?PM, Albert Peter via groups.io <albertfpeter@...> wrote:
?
Robert and everyone attending the Hamvention:
I will probably be at K9HZ's booth in one of the buildings on Friday and Saturday. I will have some signed T41 books available at that time. Get there early, since I will only have a limited number of books.
(Jack probably will not be there at Hamvention.)
Bill Schmidt will also has T41 V12 board set available .
Hope to see you there.
Al Peter
AC8GY
Jack, is there a way to get an autographed copy of Version 4, since I can't make it to the FDIM conference?
On 4/4/2025 10:53 AM, Jack, W8TEE via groups.io wrote:
All:
Al and I have just updated the 3rd edition T41 book. We moved the calibration info from Appendix C to its own chapter (20). The expanded instructions and new software make T41 calibration much easier. We have also updated
the narrative in numerous places and have concentrated discussions on the V12.6 release where those changes are important.
Some of you are asking yourself: Do I need to buy this update. Truthfully, if you already own the 3rd edition, we would say no. Most of the important changes are discussed on the web site and photos and schematics are
available there, too.
On the other hand, this is the last change we will be making to this book. Al and I have been at this for almost 7 years now and we're getting a little burned out. For that reason, we are turning this site over to Oliver King, KI3P,
and Dr. Bill Schmidt, K9HZ. Al and I will continue to be active relative to the T41, but will leave the details to Oliver and Bill.
If you do want the final version of the book, its new cover looks like this:
The book is actually available now, but the Amazon ad will not reflect the new cover for about 10 more days. (If you order now, it will be the new version.) If you are attending the FDIM conference this May (coincides with Dayton Hamvention and the conference
hotel is about 10 miles away), Al and I will be selling autographed copies on Thursday night (May 15th) at the conference hotel starting around 8PM. We have reduced the price of the autographed copies from $12,500 to $40...which is a deal and less
than the Amazon price! If you have a previous copy of the book, bring it along and we will be happy to sign it.
This has been a fun project and we want to thanks the hundreds of people have contributed to its improvement over time. We hope that continues long after Al and I are gone.
72,
Jack Purdum, W8TEE
Al Peter, AC8GY
--
Jack, W8TEE
--
73 
Bob W3RDL
|
Re: Updated (and final) Version of T41 book
Robert and everyone attending the Hamvention:
I will probably be at K9HZ's booth in one of the buildings on Friday and Saturday. I will have some signed T41 books available at that time. Get there early, since I will only have a limited number of books.
(Jack probably will not be there at Hamvention.)
Bill Schmidt will also has T41 V12 board set available .
Hope to see you there.
Al Peter
AC8GY
toggle quoted message
Show quoted text
Jack, is there a way to get an autographed copy of Version 4, since I can't make it to the FDIM conference?
On 4/4/2025 10:53 AM, Jack, W8TEE via groups.io wrote:
All:
Al and I have just updated the 3rd edition T41 book. We moved the calibration info from Appendix C to its own chapter (20). The expanded instructions and new software make T41 calibration much easier. We have also updated
the narrative in numerous places and have concentrated discussions on the V12.6 release where those changes are important.
Some of you are asking yourself: Do I need to buy this update. Truthfully, if you already own the 3rd edition, we would say no. Most of the important changes are discussed on the web site and photos and schematics are
available there, too.
On the other hand, this is the last change we will be making to this book. Al and I have been at this for almost 7 years now and we're getting a little burned out. For that reason, we are turning this site over to Oliver King, KI3P,
and Dr. Bill Schmidt, K9HZ. Al and I will continue to be active relative to the T41, but will leave the details to Oliver and Bill.
If you do want the final version of the book, its new cover looks like this:
The book is actually available now, but the Amazon ad will not reflect the new cover for about 10 more days. (If you order now, it will be the new version.) If you are attending the FDIM conference this May (coincides with Dayton Hamvention and the conference
hotel is about 10 miles away), Al and I will be selling autographed copies on Thursday night (May 15th) at the conference hotel starting around 8PM. We have reduced the price of the autographed copies from $12,500 to $40...which is a deal and less
than the Amazon price! If you have a previous copy of the book, bring it along and we will be happy to sign it.
This has been a fun project and we want to thanks the hundreds of people have contributed to its improvement over time. We hope that continues long after Al and I are gone.
72,
Jack Purdum, W8TEE
Al Peter, AC8GY
--
Jack, W8TEE
--
73 
Bob W3RDL
|
Re: Updated (and final) Version of T41 book
Jack, is there a way to get an autographed copy of Version 4,
since I can't make it to the FDIM conference?
On 4/4/2025 10:53 AM, Jack, W8TEE via
groups.io wrote:
All:
Al and I have just updated the
3rd
edition T41 book. We moved the calibration info from
Appendix C to
its own chapter (20). The expanded instructions and new
software make
T41 calibration much easier. We have also updated the
narrative in
numerous places and have concentrated discussions on the
V12.6
release where those changes are important.
Some of you are asking
yourself: Do I
need to buy this update. Truthfully, if you already own
the 3rd
edition, we would say no. Most of the important changes
are discussed
on the web site and photos and schematics are available
there, too.
On the other hand, this is the
last
change we will be making to this book. Al and I have been
at this for
almost 7 years now and we're getting a little burned out.
For that
reason, we are turning this site over to Oliver King,
KI3P, and Dr.
Bill Schmidt, K9HZ. Al and I will continue to be active
relative to
the T41, but will leave the details to Oliver and Bill.
If you do want the final
version of the
book, its new cover looks like this:
The book is actually available now, but
the Amazon ad will not reflect the new cover for about 10
more days.
(If you order now, it will be the new version.) If you are
attending
the FDIM conference this May (coincides with Dayton
Hamvention and
the conference hotel is about 10 miles away), Al and I
will be
selling autographed copies on Thursday night (May 15th)
at
the conference hotel starting around 8PM. We have reduced
the price
of the autographed copies from $12,500 to $40...which is a
deal and
less than the Amazon price! If you have a previous copy of
the book,
bring it along and we will be happy to sign it.
This has been a fun project
and
we want to thanks the hundreds of people have contributed
to its improvement over time. We
hope that continues long after Al and I are gone.
72,
Jack Purdum, W8TEE
Al Peter, AC8GY
--
Jack, W8TEE
--
73
Bob W3RDL
|
Updated (and final) Version of T41 book
All:
Al and I have just updated the 3rd
edition T41 book. We moved the calibration info from Appendix C to
its own chapter (20). The expanded instructions and new software make
T41 calibration much easier. We have also updated the narrative in
numerous places and have concentrated discussions on the V12.6
release where those changes are important.
Some of you are asking yourself: Do I
need to buy this update. Truthfully, if you already own the 3rd
edition, we would say no. Most of the important changes are discussed
on the web site and photos and schematics are available there, too.
On the other hand, this is the last
change we will be making to this book. Al and I have been at this for
almost 7 years now and we're getting a little burned out. For that
reason, we are turning this site over to Oliver King, KI3P, and Dr.
Bill Schmidt, K9HZ. Al and I will continue to be active relative to
the T41, but will leave the details to Oliver and Bill.
If you do want the final version of the
book, its new cover looks like this:
The book is actually available now, but
the Amazon ad will not reflect the new cover for about 10 more days.
(If you order now, it will be the new version.) If you are attending
the FDIM conference this May (coincides with Dayton Hamvention and
the conference hotel is about 10 miles away), Al and I will be
selling autographed copies on Thursday night (May 15th) at
the conference hotel starting around 8PM. We have reduced the price
of the autographed copies from $12,500 to $40...which is a deal and
less than the Amazon price! If you have a previous copy of the book,
bring it along and we will be happy to sign it.
This has been a fun project and
we want to thanks the hundreds of people have contributed to its improvement over time. We
hope that continues long after Al and I are gone.
72,
Jack Purdum, W8TEE
Al Peter, AC8GY
-- Jack, W8TEE
|
No one has made a stencil that I know of.
-------- Original Message -------- On 4/3/25 8:43 PM, John Owens K1JO via groups.io wrote: Thanks Oliver and Bill. I'll have a look at the updated manuals. Is the change on the RF board described, meaning which components not to install for the clock divider circuit.
One other question: I hope to build a reflow oven soon, has anyone produced the solder masks?
Best regards,
John Owens K1JO
|
Thanks Oliver and Bill. I'll have a look at the updated manuals. Is the change on the RF board described, meaning which components not to install for the clock divider circuit.
One other question: I hope to build a reflow oven soon, has anyone produced the solder masks?
Best regards,
John Owens K1JO
|
Hi John, Like Oliver said, not much from a hardware standpoint has changed. ?Mostly software and the assembly manuals that are updated when tweaks make the radio perform better. ?
There are a few new boards and kits to make things easier… like an attenuator kit. ?Shortly ill have a display driver hot that makes the display more robust. ? More to come!
Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com
email:??bill@... ?
toggle quoted message
Show quoted text
On Apr 3, 2025, at 5:55?PM, John Owens K1JO via groups.io <johnowenschina@...> wrote:
? Hi All. I'm trying to get back in gear with the T-41 build. I purchased? 4 full sets of V12.6 boards with dual RF and dual BPF, Tiny 85V, PE4302 chip, and K9HZ 20W 160-6M PA. I got these from Bill K9HZ almost a year ago.? Sadly, I couldn't work on these until now. So, my question is: Have there been any updates to these boards that I need to get and are there updated plans for building them.
Best regards and thanks in advance, John Owens K1JO
|
Hi John,
The assembly manuals are on GitHub here:
There have been updates to the RF board, but you can still use the year-old version -- just don't populate the clock divider circuit as it is no longer necessary.
Cheers, Oliver KI3P
On Thursday, April 3rd, 2025 at 5:55 PM, John Owens K1JO via groups.io <johnowenschina@...> wrote:
Hi All. I'm trying to get back in gear with the T-41 build. I purchased? 4 full sets of V12.6 boards with dual RF and dual BPF, Tiny 85V, PE4302 chip, and K9HZ 20W 160-6M PA. I got these from Bill K9HZ almost a year ago.? Sadly, I couldn't work on these until now. So, my question is: Have there been any updates to these boards that I need to get and are there updated plans for building them.
Best regards and thanks in advance, John Owens K1JO
|
Hi All. I'm trying to get back in gear with the T-41 build. I purchased? 4 full sets of V12.6 boards with dual RF and dual BPF, Tiny 85V, PE4302 chip, and K9HZ 20W 160-6M PA. I got these from Bill K9HZ almost a year ago.? Sadly, I couldn't work on these until now. So, my question is: Have there been any updates to these boards that I need to get and are there updated plans for building them.
Best regards and thanks in advance, John Owens K1JO
|
One thing. ? With the driver board in place, you should be able to jump R4 and R5… the buffer resistors on the Main board in the SPI lines. ? Not needed. ?
Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com
email:??bill@... ?
toggle quoted message
Show quoted text
On Apr 2, 2025, at 10:46?AM, K9HZ <bill@...> wrote:
? Take a picture of the driver board in place on the MAIN board please… ? One thing I did that I regret is placing the “U1” symbol at the bottom of the IC.? The little white registration dot for PIN 1 is at the bottom right. ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton – 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@... ? ? ? Completed the build for 5V. No shorts, no opens, and all connections traced and ok. However, with the Board in place, no Display. Checked it twice and made sure that both connectors were fully seated. The system still works without it, so no harm. I'll try again later and check some voltages. On 3/31/2025 6:36 AM, Oliver KI3P via groups.io wrote: On Sunday, March 30th, 2025 at 2:47 PM, Robert Luken W3RDL via groups.io <now.w3rdl@...> wrote:
Got it yesterday, heading out to the workshop to build it. May have missed your note on 5v/3.3v. On 3/30/2025 1:55 PM, K9HZ via groups.io wrote: I sent out five of those new display driver boards about a week ago and only saw posted that Terrance got his working as was able to use a 3-foot long display cable without display-T41 errors/lockups. Anyone else built it yet? I know i didnt publish an assembly manual before i headed out of the country but the thing is pretty simple and i did send out a note re how to make it work on 5v or 3.3v. Anyone else? I think its a winner but would like to know so i can get parts and boards ordered to send these out before Hamvention ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: ? email: bill@...
-- 73 <image001.gif> Bob W3RDL
?
--
73 <image001.gif> Bob W3RDL
|
Saw that. ?Ots a win!
Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com
email:??bill@... ?
toggle quoted message
Show quoted text
On Apr 2, 2025, at 6:36?PM, Robert Luken W3RDL via groups.io <now.w3rdl@...> wrote:
?
Did you miss my post that I got it working after reheating the
connector pins. I can also run Ver66.9 at both 600MHz and 528MHz
with TCXO defined.
On 4/2/2025 3:19 PM, K9HZ via groups.io
wrote:
Yep
that’s it and its in the right orientation.? The U1 part
should be on the board 180 degrees from straight up and I
think you have that right too….. with pin 1 at the white dot
in the lower right corner…
?
?
Dr.
William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ
VP5/K9HZ PJ2/K9HZ VP2EHZ
?
Owner -
Operator
Big
Signal Ranch – K9ZC
Staunton,
Illinois
?
Owner –
Operator
Villa Grand
Piton – 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@...
?
?
?
Bill, is this what you want?
On 4/2/2025 10:46 AM, K9HZ via groups.io
wrote:
Take a
picture of the driver board in place on the MAIN board
please…
?
One
thing I did that I regret is placing the “U1” symbol at
the bottom of the IC.? The little white registration dot
for PIN 1 is at the bottom right.
?
?
Dr.
William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ
VP5/K9HZ PJ2/K9HZ VP2EHZ
?
Owner -
Operator
Big
Signal Ranch – K9ZC
Staunton,
Illinois
?
Owner –
Operator
Villa Grand
Piton – 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@...
?
?
?
Completed the build for 5V. No shorts, no opens, and all
connections traced and ok. However, with the Board in place,
no Display. Checked it twice and made sure that both
connectors were fully seated. The system still works without
it, so no harm. I'll try again later and check some
voltages.
On 3/31/2025 6:36 AM, Oliver KI3P via
groups.io wrote:
On Sunday, March 30th, 2025 at 2:47
PM, Robert Luken W3RDL via groups.io <now.w3rdl@...>
wrote:
Got it yesterday, heading out to the workshop to
build it. May have missed your note on 5v/3.3v.
On 3/30/2025 1:55 PM, K9HZ via
groups.io wrote:
I sent out five of those new
display driver boards about a week ago and only saw
posted that Terrance got his working as was able to
use a 3-foot long display cable without display-T41
errors/lockups. Anyone else built it yet? I know i
didnt publish an assembly manual before i headed out
of the country but the thing is pretty simple and i
did send out a note re how to make it work on 5v or
3.3v.
Anyone else? I think its a
winner but would like to know so i can get parts
and boards ordered to send these out before
Hamvention
?
Dr. William J. Schmidt -
K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ
PJ2/K9HZ
Owner - Operator
Big Signal Ranch – K9ZC
Staunton, Illinois
Owner – Operator
Villa Grand Piton - J68HZ
Soufriere, St. Lucia W.I.
Rent it:
?
email: bill@...
--
73 <image001.gif>
Bob W3RDL
?
--
73 <image001.gif>
Bob W3RDL
--
73 <image001.gif>
Bob W3RDL
--
73
<73cw.gif>
Bob W3RDL
|
Did you miss my post that I got it working after reheating the
connector pins. I can also run Ver66.9 at both 600MHz and 528MHz
with TCXO defined.
On 4/2/2025 3:19 PM, K9HZ via groups.io
wrote:
Yep
that’s it and its in the right orientation.? The U1 part
should be on the board 180 degrees from straight up and I
think you have that right too….. with pin 1 at the white dot
in the lower right corner…
?
?
Dr.
William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ
VP5/K9HZ PJ2/K9HZ VP2EHZ
?
Owner -
Operator
Big
Signal Ranch – K9ZC
Staunton,
Illinois
?
Owner –
Operator
Villa Grand
Piton – 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@...
?
?
?
Bill, is this what you want?
On 4/2/2025 10:46 AM, K9HZ via groups.io
wrote:
Take a
picture of the driver board in place on the MAIN board
please…
?
One
thing I did that I regret is placing the “U1” symbol at
the bottom of the IC.? The little white registration dot
for PIN 1 is at the bottom right.
?
?
Dr.
William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ
VP5/K9HZ PJ2/K9HZ VP2EHZ
?
Owner -
Operator
Big
Signal Ranch – K9ZC
Staunton,
Illinois
?
Owner –
Operator
Villa Grand
Piton – 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@...
?
?
?
Completed the build for 5V. No shorts, no opens, and all
connections traced and ok. However, with the Board in place,
no Display. Checked it twice and made sure that both
connectors were fully seated. The system still works without
it, so no harm. I'll try again later and check some
voltages.
On 3/31/2025 6:36 AM, Oliver KI3P via
groups.io wrote:
On Sunday, March 30th, 2025 at 2:47
PM, Robert Luken W3RDL via groups.io <now.w3rdl@...>
wrote:
Got it yesterday, heading out to the workshop to
build it. May have missed your note on 5v/3.3v.
On 3/30/2025 1:55 PM, K9HZ via
groups.io wrote:
I sent out five of those new
display driver boards about a week ago and only saw
posted that Terrance got his working as was able to
use a 3-foot long display cable without display-T41
errors/lockups. Anyone else built it yet? I know i
didnt publish an assembly manual before i headed out
of the country but the thing is pretty simple and i
did send out a note re how to make it work on 5v or
3.3v.
Anyone else? I think its a
winner but would like to know so i can get parts
and boards ordered to send these out before
Hamvention
?
Dr. William J. Schmidt -
K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ
PJ2/K9HZ
Owner - Operator
Big Signal Ranch – K9ZC
Staunton, Illinois
Owner – Operator
Villa Grand Piton - J68HZ
Soufriere, St. Lucia W.I.
Rent it:
?
email: bill@...
--
73 
Bob W3RDL
?
--
73
Bob W3RDL
--
73
Bob W3RDL
--
73
Bob W3RDL
|
Re: [SoftwareControlledHamRadio] Ver066_9_3_22_25
Yeah exactly right… everyone is use to having a BPF in transmit to clean up the signal before transmitting…. ? But what many SDRs are missing is a preselector… a band filter mechanism in receive that only allows the band you are listening through (Hence two BPFs for dual receive… because you could be on different bands).? And because SDRs (and particularly this SRD that can operate from about 400kc up to almost 150 mhz), receiving a very loud signal pretty much anywhere in its receive range can desensitize the front end/ mixer to the point that you hear nothing!? We fixed that with the BPF in the T41 operating in Receive too…. ? So when at Field Day operating with friends on different bands… you won’t see any interference in the receiver from them. ? That’s the reason we used a 5 pole filter…the skirts are very sharp so all the trash outside of the TX and RX frequency is greatly attenuated. ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton – 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@... ? ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of Oliver KI3P via groups.io
Sent: Wednesday, April 2, 2025 4:09 PM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] Ver066_9_3_22_25? Bill can comment further, but the BPF should be in the signal path in both RX and TX mode.? In TX mode it cleans up the signal before it goes to the PA. This means that higher-order harmonics of the signal produced by the exciter -- copies of the signal at multiples of the transmit signal -- are filtered out and not amplified by the PA. These would be removed by the LPF anyway before they could hit the antenna, but removing them before the PA helps with signal quality because the PA isn't having to amplify signals at multiple bands simultaneously. In RX mode the BPF keeps the other bands away from the input to the mixer. If you didn't have the BPF in place you would expect to get a higher noise level in the audio at best, and distortion from strong signals in other bands at worst. On Wednesday, April 2nd, 2025 at 3:54 PM, epif18 via groups.io <epif18@...> wrote:
Well, I did some more troubleshooting and this is what I found: I stuck some troubleshooting code at the beginning (first line) of loop().? Draw a line on the display.? Well, looked like setup never exited.? Stuck that code in various places in .ino and eventually found that swrSetup() was hanging up.? I have the SWR_AD7991 installed but not the transformer (shorted RF In to RFOut). I commented #define V12_LPF_SWR_AD7991 out.? Then I commented out swrSetup() and 66.9 ran! Looks like it's not in the latest code on github (KI3P/SDTVer066-9) that was updated 2 weeks ago. I've shut down my radio and brought it back up and all is good. Still a little noisy on 40M but 20M seems to be working great. While I'm at it, when should the BPF_TX and _RX be in or out?? I attached a test cable to the LPF ACC Control connector and those signals are different moving from 66.4 to 66.9.? In 66.4, BPF_RX was out in SSB mode and in when in CW mode.? In 66.9, it appears that BPF_RX is "in" in both modes.?
?
|
Yep that’s it and its in the right orientation.? The U1 part should be on the board 180 degrees from straight up and I think you have that right too….. with pin 1 at the white dot in the lower right corner… ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton – 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@... ? ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of Robert Luken W3RDL via groups.io
Sent: Wednesday, April 2, 2025 2:07 PM
To: [email protected]
Subject: Re: [AmateurRadioBuilders] Display driver board? Bill, is this what you want? On 4/2/2025 10:46 AM, K9HZ via groups.io wrote: Take a picture of the driver board in place on the MAIN board please… ? One thing I did that I regret is placing the “U1” symbol at the bottom of the IC.? The little white registration dot for PIN 1 is at the bottom right. ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton – 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@... ? ? ? Completed the build for 5V. No shorts, no opens, and all connections traced and ok. However, with the Board in place, no Display. Checked it twice and made sure that both connectors were fully seated. The system still works without it, so no harm. I'll try again later and check some voltages. On 3/31/2025 6:36 AM, Oliver KI3P via groups.io wrote: On Sunday, March 30th, 2025 at 2:47 PM, Robert Luken W3RDL via groups.io <now.w3rdl@...> wrote:
Got it yesterday, heading out to the workshop to build it. May have missed your note on 5v/3.3v. On 3/30/2025 1:55 PM, K9HZ via groups.io wrote: I sent out five of those new display driver boards about a week ago and only saw posted that Terrance got his working as was able to use a 3-foot long display cable without display-T41 errors/lockups. Anyone else built it yet? I know i didnt publish an assembly manual before i headed out of the country but the thing is pretty simple and i did send out a note re how to make it work on 5v or 3.3v. Anyone else? I think its a winner but would like to know so i can get parts and boards ordered to send these out before Hamvention ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: ? email: bill@...
-- 73  Bob W3RDL
?
--
73 Bob W3RDL
--
73 Bob W3RDL
|
Bill, is this what you want?
On 4/2/2025 10:46 AM, K9HZ via
groups.io wrote:
Take a
picture of the driver board in place on the MAIN board
please…
?
One thing
I did that I regret is placing the “U1” symbol at the bottom
of the IC.? The little white registration dot for PIN 1 is
at the bottom right.
?
?
Dr.
William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ
VP5/K9HZ PJ2/K9HZ VP2EHZ
?
Owner -
Operator
Big
Signal Ranch – K9ZC
Staunton,
Illinois
?
Owner –
Operator
Villa Grand
Piton – 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@...
?
?
?
Completed the build for 5V. No shorts, no opens, and all
connections traced and ok. However, with the Board in place,
no Display. Checked it twice and made sure that both
connectors were fully seated. The system still works without
it, so no harm. I'll try again later and check some voltages.
On 3/31/2025 6:36 AM, Oliver KI3P via
groups.io wrote:
On Sunday, March 30th, 2025 at 2:47 PM,
Robert Luken W3RDL via groups.io <now.w3rdl@...>
wrote:
Got it yesterday, heading out to the workshop to build
it. May have missed your note on 5v/3.3v.
On 3/30/2025 1:55 PM, K9HZ via
groups.io wrote:
I sent out five of those new
display driver boards about a week ago and only saw
posted that Terrance got his working as was able to
use a 3-foot long display cable without display-T41
errors/lockups. Anyone else built it yet? I know i
didnt publish an assembly manual before i headed out
of the country but the thing is pretty simple and i
did send out a note re how to make it work on 5v or
3.3v.
Anyone else? I think its a winner
but would like to know so i can get parts and boards
ordered to send these out before Hamvention
?
Dr. William J. Schmidt -
K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ
PJ2/K9HZ
Owner - Operator
Big Signal Ranch – K9ZC
Staunton, Illinois
Owner – Operator
Villa Grand Piton - J68HZ
Soufriere, St. Lucia W.I.
Rent it:
?
email: bill@...
--
73 
Bob W3RDL
?
--
73
Bob W3RDL
--
73
Bob W3RDL
|
My 4 poles mesh filters results :
|
John Owens K1JO
Jack, W8TEE
K9HZ
