Re: Help: Audio is pumping on bands 17 and 15.

#33970

Well, I think 3 seconds is ok... keeps you from pressing the button twice accidently and having the radio come right back on...  You could probably cut it to 1 second though...


Dr. William J. Schmidt - K9HZ J62K(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: www.VillaGrandPiton.com

Moderator: North American QRO Group at Groups.IO.
Moderator: Amateur Radio Builders Group at Groups.IO.

email:  bill@...

Show quoted text

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Oliver KI3P via groups.io
Sent: Tuesday, May 20, 2025 5:30 PM
To: [email protected]
Cc: Oliver KI3P via groups.io <oliver@...>
Subject: Re: [SoftwareControlledHamRadio] Help: Audio is pumping on bands 17 and 15.

Yeah, that's probably an unnecessarily long wait. The ATTiny85 code has a couple of delays that result in the long wait. It can easily be shortened by changing these two lines:

On Tuesday, May 20th, 2025 at 6:24 PM, jerry-KF6VB <jerry@...> wrote:

On 2025-05-20 13:09, Oliver KI3P via groups.io wrote:

Do you know what else that sounds like? The audio artifact you get 
after you press the On/Off button and are waiting for the ATTiny to 
turn the power off.*** That has always mystified me. The way it's supposed to work is:
You press the power button. The AtTiny tells the Teensy - "It's time 
to shut down".
The Teensy quickly cleans up and tells the atTiny - "OK to shut down 
now", and the atTiny turns off the juice.

So the Teensy doesn't "wait" for the atTiny - it's the atTiny waiting 
for the Teensy.

It should reasonably happen in one swing of the main loop.

- Jerry, KF6VB

Re: Help: Audio is pumping on bands 17 and 15.

#33969

Correct... but NOT if the ATTINY is missing but the config thinks it is!!!


Dr. William J. Schmidt - K9HZ J62K(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: www.VillaGrandPiton.com

Moderator: North American QRO Group at Groups.IO.
Moderator: Amateur Radio Builders Group at Groups.IO.

email:? bill@...

Show quoted text

-----Original Message-----
From: [email protected]
<[email protected]> On Behalf Of jerry-KF6VB
Sent: Tuesday, May 20, 2025 5:25 PM
To: [email protected]
Cc: Oliver KI3P via groups.io <oliver@...>
Subject: Re: [SoftwareControlledHamRadio] Help: Audio is pumping on bands 17
and 15.

On 2025-05-20 13:09, Oliver KI3P via groups.io wrote:
Do you know what else that sounds like? The audio artifact you get 
after you press the On/Off button and are waiting for the ATTiny to 
turn the power off.
*** That has always mystified me.  The way it's *supposed* to work is:
You press the power button.  The AtTiny tells the Teensy - "It's time to
shut down".
The Teensy quickly cleans up and tells the atTiny - "OK to shut down now",
and the atTiny turns off the juice.

So the Teensy doesn't "wait" for the atTiny - it's the atTiny waiting for
the Teensy.

It should reasonably happen in one swing of the main loop.

               - Jerry, KF6VB

Re: LPF question

#33968

开云体育

If you will eventually use the 100W PA… yes you want 200V caps!

?

Here is a simpleton approach (there is way more to this, but just for reason):? P=IE, E=IR, so P=E^2/R … so E = SQRT (P * R)… if the impedance were a perfect match in the circuits (it won’t be), E = SQRT (100 * 50 = 5000) = 70.7V average… and peak is twice that so almost 150VAC!? 100V Caps won’t work!

?

Dr. William J. Schmidt - K9HZ J62K(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@...

?

Show quoted text

From: [email protected] <[email protected]> On Behalf Of Robert Luken W3RDL via groups.io
Sent: Tuesday, May 20, 2025 11:44 AM
To: [email protected]
Subject: [SoftwareControlledHamRadio] LPF question

?

The BOM for the LPF Filter board lists all of the caps as 200V but the schematic shows 100V. The 200V and higher caps are almost non existent on Mouser or DigiKey and the few values there are $1.00+ each. Are 100V parts acceptable for 100W?

--

73

Bob W3RDL

?

Virus-free.

Re: T41 Hilbert Filter Design

#33967

开云体育

Hey Terrance… you put together a really special variation of the T41 V12… the Beacon receiver… and the remote screen.? Make sure Al gets those into his pages too!

?

Dr. William J. Schmidt - K9HZ J62K(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@...

?

Show quoted text

From: [email protected] <[email protected]> On Behalf Of Terrance Robertson, KN6ZDE via groups.io
Sent: Tuesday, May 20, 2025 11:32 AM
To: [email protected]
Subject: [SoftwareControlledHamRadio] T41 Hilbert Filter Design

?

Al

?

I noticed that the Hilbert filter coefficients in v66-9 don't exhibit the same structure as in v50 where the negative 45 phase shift coefficients are just the reverse order of the positive 45 phase shift coefficients.? Can you provide the Hilbert filter design files for v66-9 and v50.??

?

Thanks Terrance

Re: JLCPCB Price Increase

#33966

It’s great Glenn. No complaints here at all in VK land.

?

Regards
Phil VK2KKZ

Re: Help: Audio is pumping on bands 17 and 15.

#33965

I've pushed a bug fix to the Ver66-9 github repo to get rid of the audio artifact on shutdown. Does this fix your problem when you enable MAIN_BOARD_ATTINY_SHUTDOWN?

On Wednesday, May 21st, 2025 at 6:28 AM, bty84827531 via groups.io <roger.trett@...> wrote:

Show quoted text

Thanks Oliver.

?

My rig does have the ATTiny in place and it is programmed.

Re: T41 Books for sale - signed copies Latest version

#33964

On 2025-05-20 23:09, K9HZ wrote:
I just shipped a small UPS box to the UK and it was $58.*** Was that through Pirate Ship?

                - Jerry, KF6VB

Re: T41 Books for sale - All gone!

#33963

I am down to just one book, so I will probably cut off the offer at this time.

Sorry anyone missed out. Thanks very much to those who replied.

Regards,

Al

AC8GY

Re: T41 Books for sale - signed copies Latest version

#33962

Keith,

It looks like about $60 for shipping alone. I only have one left. It does not seem like our signatures are worth $60.

?

How about if I scan one of the signature pages and personalize it to you n send it attachment. Then you could add it to the book w/o having to spend over 100$

Al

Re: Help: Audio is pumping on bands 17 and 15.

#33961

Thanks Oliver.

?

My rig does have the ATTiny in place and it is programmed.

Re: Help: Audio is pumping on bands 17 and 15.

#33960

The main board (optionally) uses an ATTiny85 to control the power rail. When you press the power on/off push button on the front panel the Teensy code executes a function (ShutdownTeensy) in which you can perform any shutdown operations you'd like before commanding the ATTiny85 to cut the power to the radio. For reasons I haven't prioritized figuring out yet, the audio processing chain exhibits a chopping or pulsing artifact after the button is pressed. It can probably be fixed by clearing the audio buffers after the shutdown command is sent. I'll test that out next time I'm in the lab.

?

I'm guessing that for your radio the BEGIN_TEENSY_SHUTDOWN pin (physical pin 2, GPIO 0) is floating because you have not populated the ATTiny85, and this floating pin is interpreted as a HIGH at some point, triggering the audio artifact.

?

Re: Help: Audio is pumping on bands 17 and 15.

#33959

Oliver, yes it does!

?

Howcome?

?

BTW there is still a loud "pop" when the rig is turned on. This has been there all along but was a minor issue.

?

Roger G8JWT

Re: T41 Books for sale - signed copies Latest version

#33958

开云体育

I just shipped a small UPS box to the UK and it was $58. ?And that is the cheapest price (would not be less at zero weight). USPS wont even deliver a package to the UK anymore.?

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@...

?

Show quoted text

On May 20, 2025, at 7:13?PM, G0GNL via groups.io <hammy.groups@...> wrote:

?
Hi Al
your post said " Outside the US, international shipping applies," which suggests you'd be willing
to try international shipping.

So any idea what it would cost to send to England/Great britain/United Kingdom?

If it's not too prohibitive can you accept anything other than a paper cheque (check!).
I'd prefer an electronic payment, either a direct bank transfer or Paypal. Both of these will
cover the currency conversion charges and I'll happily add on the Paypal commision so
you're not out-of-pocket.

Regards and thanks for the interesting project

Keith, G0GNL

Re: JLCPCB Price Increase

#33957

On 2025-05-20 18:40, glenn via groups.io wrote:

Shipping $1.50  global standard direct*** Sigh.  That's what it cost here in the good old days...

               - Jerry, KF6VB

Re: JLCPCB Price Increase

#33956

I just ordered a PCB from JLC.

?

Cost was US$2?? plus they charge GST 10% (sales tax in VK)

Shipping $1.50? global standard direct

or DHL $18.00

?

Glenn

Re: T41 Books for sale - signed copies Latest version

#33955

Hi Al

your post said " Outside the US, international shipping applies," which suggests you'd be willing

to try international shipping.

So any idea what it would cost to send to England/Great britain/United Kingdom?

If it's not too prohibitive can you accept anything other than a paper cheque (check!).

I'd prefer an electronic payment, either a direct bank transfer or Paypal. Both of these will

cover the currency conversion charges and I'll happily add on the Paypal commision so

you're not out-of-pocket.

Regards and thanks for the interesting project

Keith, G0GNL

Re: Help: Audio is pumping on bands 17 and 15.

#33954

Yeah, that's probably an unnecessarily long wait. The ATTiny85 code has a couple of delays that result in the long wait. It can easily be shortened by changing these two lines:

Show quoted text

On Tuesday, May 20th, 2025 at 6:24 PM, jerry-KF6VB <jerry@...> wrote:



On 2025-05-20 13:09, Oliver KI3P via groups.io wrote:

Do you know what else that sounds like? The audio artifact you get
after you press the On/Off button and are waiting for the ATTiny to
turn the power off.*** That has always mystified me. The way it's supposed to work is:
You press the power button. The AtTiny tells the Teensy - "It's time to
shut down".
The Teensy quickly cleans up and tells the atTiny - "OK to shut down
now", and the
atTiny turns off the juice.

So the Teensy doesn't "wait" for the atTiny - it's the atTiny waiting
for the Teensy.

It should reasonably happen in one swing of the main loop.

- Jerry, KF6VB

Re: Help: Audio is pumping on bands 17 and 15.

#33953

On 2025-05-20 13:09, Oliver KI3P via groups.io wrote:
Do you know what else that sounds like? The audio artifact you get
after you press the On/Off button and are waiting for the ATTiny to
turn the power off.
*** That has always mystified me.  The way it's *supposed* to work is:
You press the power button.  The AtTiny tells the Teensy - "It's time to shut down".
The Teensy quickly cleans up and tells the atTiny - "OK to shut down now", and the
atTiny turns off the juice.

So the Teensy doesn't "wait" for the atTiny - it's the atTiny waiting for the Teensy.

It should reasonably happen in one swing of the main loop.

              - Jerry, KF6VB

Re: Help: Audio is pumping on bands 17 and 15.

#33952

I’ll check that out tomorrow and get back to you. Without a carrier tuned in the background noise pulses in a similar way. It’s more pronounced on 17m than 15m.

Re: Help: Audio is pumping on bands 17 and 15.

#33951

Do you know what else that sounds like? The audio artifact you get after you press the On/Off button and are waiting for the ATTiny to turn the power off.

Does this sound go away if you comment out the following line in Config.h (line 17)?

#define MAIN_BOARD_ATTINY_SHUTDOWN

On Tuesday, May 20th, 2025 at 12:51 PM, bty84827531 via groups.io <roger.trett@...> wrote:

Show quoted text

Oliver, here's a recording of my T41 on 17m being driven by a carrier from a signal generator.

?

Roger G8JWT