I think the crowdfund could be the best way to check demand (for the assembled units).
Set up a goal of 20,000$ (200$? * 100) and see what happens.?
If the goal is not reached the money gets back, no harm to anyone.
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We would produce it if there were demand for it.? It takes 100 pcbs to be viable.
On Sun, Sep 15, 2024, 12:40 PM IU0KVG via <vincenzo.praturlon= [email protected]> wrote: @Farhan Why don't we crowfund this?
200$ each, with a discount coupon for the same amount as perk.
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@Farhan Why don't we crowfund this?
200$ each, with a discount coupon for the same amount as perk.
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Re: uBITX Digital Adapter Board pinouts
At the risk of replying to my own post ....
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I found this reference in the list archive but the page no longer exists? ...
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https://ubitx.com/2018/07/28/digital-adapter-board/
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The Wayback Machine produced this but there's nothing there of worth either ...
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https://web.archive.org/web/20181013095916/https://ubitx.com/2018/07/28/digital-adapter-board/
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uBITX Digital Adapter Board pinouts
Does anyone have the pinout/wiring diagram for the "Digital Adapter Board" as sold by
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Its been a while since I bought the box/boards and now I'm finally getting to them but have lost the paperwork. I tried visiting their site to download it but nothing found. My intention is to add a small USB hub board to the back of the connector (as found on Amazon - 2 for $10) and wire the Radiuno and a CM108 sound interface directly into the box making for a single cable control/audio solution.
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Thanks!
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Mark NI2O
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Re: Data recovery from a dead MicroSD card
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Reverse diode and a fuse is all I use on any of my projects. Total cost about $0.50. Voltage drop equal zero.
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I also use the fet method, not as simple as a diode, but voltage drop way lesd
I use Powerpoles for battery and PSU connections.? I also use KC9ON's FET-based devices in place of diodes.? They're good for up to 50 V and 7 A.
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There are also 'ideal diode' boards that are inexpensive.? I've not used them, yet a guy with a Swiss distortion in the signal seems to like them.?
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73, Andy
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I use Powerpoles for battery and PSU connections.? I also use KC9ON's FET-based devices in place of diodes.? They're good for up to 50 V and 7 A.
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There are also 'ideal diode' boards that are inexpensive.? I've not used them, yet a guy with a Swiss distortion in the signal seems to like them.?
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73, Andy
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Re: Sbitx and ad831 mixer
Farhan,?
Later I would like learn more about harmonic mixing.
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What I think I would do is to setup the bandpass filters for 10m, 6m, 4m and 2m. If fm is added later, it will be fun to operate on those bands.
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But before all that happens have to box everything and think about power management. There is some artifacts in the audio related to that.?
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Thanks a lot for this amazing software that gives us the oportunity to tinker and do homebrewing easier because half of the radio is done.?
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Thanks again,?
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Juan WP3DN
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Re: Sbitx and ad831 mixer
Peter,?
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This the normal sbitx software with audio injector card and si5351. Have two ad831 mixers and a 10.7mhz 30khz crystal filter.
To rx clock 2 goes to first mixer and bfo goes to 2nd mixer. Sound output from the mixer goes to the sound input to sbitx software.
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To tx clock 1 bfo goes to 1st mixer and clock 2 to 2nd mixer. Audio output from sbitx sound card goes to 1st mixer, same input from antenna in rx. The antenna is switch to the output of the 2nd mixer.
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To do the clock swap and antenna switching im using two small relays.
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Juan WP3DN
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Re: Sbitx and ad831 mixer
This is a nice setup, can you explain it in a bit more detail, what frequencies are you running on each mixer, I assume the second one is a fixed frequency, and are you pushing the output into something like a zbitx to generate the waterfall ?
Farhan,?
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This is a video of a ssb tx test and how it looks on sbitx v1 spectrum.?
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For mic bias I used 10k resistor to 5v and 4.7uf capacitor. No mic amp.
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Juan, WP3DN
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Re: Sbitx and ad831 mixer
Farhan,?
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This is a video of a ssb tx test and how it looks on sbitx v1 spectrum.?
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For mic bias I used 10k resistor to 5v and 4.7uf capacitor. No mic amp.
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Juan, WP3DN
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Re: Sbitx and ad831 mixer
With the AD831 mixer, you should be able to use 3rd harmonic mixing and go upto 435 Mhz
Farhan,?
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No band pass filter in place yet. Just wanted to see if it was generating rf.? Need to decide which bands to include since the need to filter per band.
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Juan WP3DN
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Re: Sbitx and ad831 mixer
Farhan,?
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No band pass filter in place yet. Just wanted to see if it was generating rf.? Need to decide which bands to include since the need to filter per band.
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Juan WP3DN
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Data recovery from a dead MicroSD card
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Only 16 minutes ;-)
--
Gyula HA3HZ
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Re: Renewed attempt to hack together a workable PA
You did read VK7MX's post? Attached.
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: www.VillaGrandPiton.com
Moderator: North American QRO Group at Groups.IO.
Moderator: Amateur Radio Builders Group at Groups.IO.
email: bill@...
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] < [email protected]> On Behalf Of Ravi Miranda Sent: Friday, September 13, 2024 10:32 AM To: [email protected]Subject: Re: [BITX20] Renewed attempt to hack together a workable PA William, I'm not sure what you are talking about here. I'm mentioning about the 20Watt amp that I have and uBITx board I built and I am/was looking for advice on the predriver stages. This is not a kit and is my bespoke build. Maybe you are on the wrong thread? Have a lovely day and good weekend. Best 73, Ravi/M0RVI On Fri, 13 Sept 2024 at 13:53, K9HZ via groups.io <bill@...> wrote:
The learning for me was that I should never announce a product/ kit before I have them in hand and sell out what I have, re-stock and repeat. No more lists. I used the list to gauge part purchases in advance to negotiate the absolute best prices for the kits. The kits, as always, were sold at my cost so the savings by planning went to the buyers.
You know what they say. Learn. Never again.
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: www.VillaGrandPiton.com
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 Bill Maxwell
via groups.io
Sent: Thursday, September 12, 2024 6:04 PM
To: [email protected]
Subject: Re: [BITX20] Renewed attempt to hack together a workable PA
I suspect the nub of Andy's problem was the list of potential buyers that was run for many months before you understandably decided it was too much effort for too little gain to chase up the people on the list once you had stock available and opened purchase to all comers. I think quite a few on the list thought the list was still active and that you would get to them in time, so didn't respond to your "all comers" invitation, hence didn't actually lodge orders with you. I know I nearly fell into that category.
Bill, VK7MX
-- I'm here to add more value to the world than I'm using up.
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Re: Sbitx and ad831 mixer
https://youtu.be/Rn_7CbXwqt0?si=HTt1cNa-2umdUhMc
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Re: Sbitx and ad831 mixer
Tx works!!!!
Did a little board to swap the clocks and another board to switch rx/transmit audio and tx/receive audio. Very low power but enough to listen on a handheld radio!!!
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Juan WP3DN
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Mark Phillips
Tominaz
HA3HZ
K9HZ