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Re: T41 Hilbert Filter Design
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
By K9HZ · #33967 ·
Re: JLCPCB Price Increase
It¡¯s great Glenn. No complaints here at all in VK land. Regards Phil VK2KKZ
By Phil Taylor · #33966 ·
Re: Help: Audio is pumping on bands 17 and 15.
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?
By Oliver KI3P · #33965 ·
Re: T41 Books for sale - signed copies Latest version
*** Was that through Pirate Ship? - Jerry, KF6VB
By jerry-KF6VB · #33964 ·
Re: T41 Books for sale - All gone!
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
By Albert Peter · #33963 ·
Re: T41 Books for sale - signed copies Latest version
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
By Albert Peter · #33962 ·
Re: Help: Audio is pumping on bands 17 and 15.
Thanks Oliver. My rig does have the ATTiny in place and it is programmed.
By bty84827531 · #33961 ·
Re: Help: Audio is pumping on bands 17 and 15.
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
By Oliver KI3P · #33960 ·
Re: Help: Audio is pumping on bands 17 and 15.
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
By bty84827531 · #33959 ·
Re: T41 Books for sale - signed copies Latest version
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 -
By K9HZ · #33958 ·
Re: JLCPCB Price Increase
*** Sigh. That's what it cost here in the good old days... - Jerry, KF6VB
By jerry-KF6VB · #33957 ·
Re: JLCPCB Price Increase
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
By glenn · #33956 ·
Re: T41 Books for sale - signed copies Latest version
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
By G0GNL · #33955 ·
Re: 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:
By Oliver KI3P · #33954 ·
Re: Help: Audio is pumping on bands 17 and 15.
*** 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
By jerry-KF6VB · #33953 ·
Re: Help: Audio is pumping on bands 17 and 15.
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.
By bty84827531 · #33952 ·
Re: Help: Audio is pumping on bands 17 and 15.
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
By Oliver KI3P · #33951 ·
Re: Help: Audio is pumping on bands 17 and 15.
That almost sounds like the keyer is on. Jack, W8TEE
By jjpurdum · #33950 ·
Re: Help: Audio is pumping on bands 17 and 15.
Oliver, here's a recording of my T41 on 17m being driven by a carrier from a signal generator. Roger G8JWT
By bty84827531 · #33949 ·
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+
By Robert Luken W3RDL · #33948 ·