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Re: RF Board update.
开云体育Same RF board. ?Just changed the two op amps for lower noise parts. ? You can still use the original parts of you want… and the bom was updated a couple of months ago. ?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@... ? On Mar 1, 2025, at 12:45?PM, Doug W via groups.io <dougwilner@...> wrote:
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Alternative to Pico?
All: I've also experimented with the XIAO processor from Seeed Studio. It's about the size of your thumbnail and costs $5: It has 256K of flash and 32K of SRAM with 19 general I/O pins, ADC/DAC pins. I have used earlier versions of this microprocessor and is compatible with the Arduino IDE and libraries...I haven't found a library yet that didn't work, but there may be some. I use this over the Nano--the clock is 2x faster, a lot more memory, and a much smaller footprint. I don't know if it speed is fast enough for T41 I/O duties. More specs at: Jack, W8TEE -- Jack, W8TEE |
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RP Pico 2
All: I just read that the RP Pico 2 is now capable of running at 200MHz, up from 133MHz earlier. Using CMake, the new speed setting in the compiler is a symbolic constant: PICO_USE_FASTEST_SUPPORTED_CLOCK=1. I don't know if the Arduino IDE recognizes this or not. There's been interest here in using the Pico as a second I/O processor in the T41. The Pico W has 26 I/O pins, 2Mb of Flash, and WiFi/Bluetooth support. No price was given for the Pico 2 nor did it say anything about WiFi/Bluetooth support, but the standard Pico W is about $8-$10. If I see additional info, I'll post it here. Jack, W8TEE -- Jack, W8TEE |
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Re: fix bent heatsink with 3d printed combs
开云体育Huh… pretty ingenious… ? ? 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@... ? ? From: [email protected] <[email protected]> On Behalf Of Doug W via groups.io
Sent: Wednesday, February 26, 2025 1:11 PM To: [email protected] Subject: [AmateurRadioBuilders] fix bent heatsink with 3d printed combs ? Yesterday's delivery brought a bent heatsink.? I didn't want to throw out something that was still usable or use it so mangled so I did what we do.? I drew and printed 2 combs in a few minutes to try to fix it in two steps.? I might try another round with tighter tolerances but I can live with this.? I did not take pictures along the way but this should explain... ? tap the first comb down into the fins before the damage.? using a wood block (or you could print something) so you don't do more damage, drive the comb all the out the damaged end.? repeat with the second comb. ? ? ? Happy to share stl's if anyone cares.? This is the heatsink ? I bought the 150mm variation that will eventually go on a K9HZ 20w PA. ? Doug AC9RZ |
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Re: fix bent heatsink with 3d printed combs
Doug, Great idea! Jack K3JAS
On Wednesday, February 26, 2025 at 02:11:28 PM EST, Doug W via groups.io <dougwilner@...> wrote:
Yesterday's delivery brought a bent heatsink.? I didn't want to throw out something that was still usable or use it so mangled so I did what we do.? I drew and printed 2 combs in a few minutes to try to fix it in two steps.? I might try another round with tighter tolerances but I can live with this.? I did not take pictures along the way but this should explain...
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tap the first comb down into the fins before the damage.? using a wood block (or you could print something) so you don't do more damage, drive the comb all the out the damaged end.? repeat with the second comb.
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?
?
Happy to share stl's if anyone cares.?
This is the heatsink ? I bought the 150mm variation that will eventually go on a K9HZ 20w PA.
?
Doug
AC9RZ
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fix bent heatsink with 3d printed combs
Yesterday's delivery brought a bent heatsink.? I didn't want to throw out something that was still usable or use it so mangled so I did what we do.? I drew and printed 2 combs in a few minutes to try to fix it in two steps.? I might try another round with tighter tolerances but I can live with this.? I did not take pictures along the way but this should explain...
?
tap the first comb down into the fins before the damage.? using a wood block (or you could print something) so you don't do more damage, drive the comb all the out the damaged end.? repeat with the second comb.
?
?
?
Happy to share stl's if anyone cares.?
This is the heatsink ? I bought the 150mm variation that will eventually go on a K9HZ 20w PA.
?
Doug
AC9RZ
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Re: I'm Back!
开云体育Keep that thought!? I’m at my contest station in the Caribbean for the ARRL DX SSB next weekend… We can do this when I get back home.? The folks at home won’t know what to do! ? ? 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@... ? ? From: [email protected] <[email protected]> On Behalf Of Paul K5EBP via groups.io
Sent: Tuesday, February 25, 2025 9:12 AM To: [email protected] Subject: Re: [AmateurRadioBuilders] I'm Back! ? Yay for 100w PA kits! ? I still want this list when available: ? 2-100w PA kits 2-LC kits 2-Tuners you spoke of your own design? ? thank you for these treasures Dr Bill! ? Paul K5EBP |
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Re: I'm Back!
开云体育Well… Yes I was SUPPOSED TO have a website… created by my beautiful wife… HOWEVER… she has been putting that off for the past couple of weeks… so all I have is a shell with nothing there:? ? She is working on the taxes for a couple of our businesses and will get back to it shortly (hobby thing you know).? In the interim, I will take orders via private email… ? ? 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@... ? ? From: [email protected] <[email protected]> On Behalf Of Gary via groups.io
Sent: Monday, February 24, 2025 11:38 AM To: [email protected] Subject: Re: [AmateurRadioBuilders] I'm Back! ? Bill, I think I remember that you have a website for ordering, remind me what its url is. If not, where is the list of orders for kits? Gary W9TD |
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Re: USPS Ban on China - Follow up...
开云体育I’m like that too… you are in good company. ? ? 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@... ? ? From: [email protected] <[email protected]> On Behalf Of Doug W via groups.io
Sent: Monday, February 24, 2025 11:37 AM To: [email protected] Subject: Re: [AmateurRadioBuilders] USPS Ban on China - Follow up... ? On Mon, Feb 24, 2025 at 10:51 AM, K9HZ wrote:
------------------------------------------ ? That is what I thought at first but the order made it to the US before it got stuck.? Either way, this morning's email shows it is moving now.? Funny how now I get jumpy when a dirt cheap order takes a few weeks instead of a few days.? I am almost embarrassed how spoiled I have become. ? |
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Re: I'm Back!
开云体育The LC Meter is on hold…? I’m looking to get to that sometime later this summer now.? Oliver has turned this back to me to complete. ? I’m currently kitting the 100W amp modules. ? ? 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@... ? ? From: [email protected] <[email protected]> On Behalf Of Peter McCracken EI3JCB via groups.io
Sent: Monday, February 24, 2025 11:05 AM To: [email protected] Subject: Re: [AmateurRadioBuilders] I'm Back! ? Hi Bill, ? Just following up on this thread, did you ever get the LC Meter kits or 100W amp into stock ? ? I don't remember seeing further emails on this but could have missed them in the interim, if I have apologies. ? Thanks! ? Br Peter EI3JCB ? ? On Wed, 25 Dec 2024 at 13:36, John KC9OJV via <greusel=[email protected]> wrote:
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K9HZ
Jack, W8TEE
Paul K5EBP
Gary