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Re: Display Noise
Do you have a piece of aluminum you can put behind the display and clip-lead
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it to ground to test if a shield will work? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois Owner ¨C Operator Villa Grand Piton ¨C 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@... -----Original Message-----
From: [email protected] <[email protected]> On Behalf Of jerry-KF6VB Sent: Thursday, February 6, 2025 10:54 AM To: [email protected] Subject: [SoftwareControlledHamRadio] Display Noise The upper bands are open this morning - I heard a W2 on 10M. Listening on 15 right now. I can hear the display. It makes a rhythmic grinding noise. Here's something interesting.. ...I put my hand up to the outside of the display - and the grinding noise gets quieter. I can only guess that my hand absorbs RF out of the display. - Jerry, KF6VB |
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Re: Display driver kits shortly
¿ªÔÆÌåÓýThe right ones will work¡., but they need to be the thin versions or it¡¯s a struggle. ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C 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 bruce williams via groups.io
Sent: Thursday, February 6, 2025 10:05 AM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] Display driver kits shortly ? If you cant get a reasonable price, how about just sandwiching two 1x5 headers? |
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Re: Display driver kits shortly
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Re: Display driver kits shortly
Check Amazon 25 for $7 " Brand Pro"
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25-Pack 10P 2.54mm 0.1" Pitch PCB Female Pin Headers 2x5 Dual Rows 10 Pins Female Sockets to Male Straight PCB DIP, Double Rows PC Board Through-Board Strip (2x5-10P-25PK)
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Display driver kits shortly
¿ªÔÆÌåÓýWith one or two exceptions¡ I¡¯ll put together kits for the display driver.? I can even have a few of them built for those who want a finish product (my daughter-in-law is a stay at home EE who needs something to do.? She has built stuff for me before). ? One thing¡ I need some help finding the part in the attached diagram at a reasonable price (like it should be about $0.15 max each)¡ it¡¯s a 10 pin female socket, 2x5, PCB mount.? Tayda has 2x4 and 2x6 but not 2x5 for whatever reason.? Digikey and Mouser are sky high. ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C 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@... ? ? |
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Re: SMD Stencil/Reflow solution?
¿ªÔÆÌåÓýYeah it doesn¡¯t work very well for Capacitors or Inductors because the test frequency is so low¡ but I like the size¡ ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C 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 Phil Taylor via groups.io
Sent: Wednesday, February 5, 2025 10:09 PM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] SMD Stencil/Reflow solution? ? [Edited Message Follows] I ended up buying the FNRISI tweezers also. ? A note of caution.? Some capacitors read quite low from auto. When I played with the measurement frequency, things were better. ? -- Regards |
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Re: Excessive Noise
¿ªÔÆÌåÓýMark, just remember, for troubleshooting¡ all you need is the Main board, the RF board, and the display¡ you can take everything else out of the chain (eg RX antenna straight to the RF-in on the RF board¡ and TX antenna or dummy load on the TX OUT of the RF board.?? ? Once calibrated, I do recommend removing JP4 from the RF board¡ no need for it being there except for calibration. ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C 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 epif18 via groups.io
Sent: Wednesday, February 5, 2025 9:36 AM To: [email protected] Subject: [SoftwareControlledHamRadio] Excessive Noise ? Hey yall, I've built my boards and have them all hooked up.? I've started with receiver checkout, and unlike my V11 which was amazing !, I have a lot of noise, specially on 40M.? I'm not in an ideal environment yet, but the behavior is so different than V11.? I can pick up very strong CW signals (one!) and a spanish AM broadcast at 7.35 something.? So in the process of checking things out, I hooked up my SA to TX out on the RF board and TXed SSB, which looked fine.? Then I switched to CW, and the freq was good but when I released the key and the RX returned, I got this.? 25MHZ, and 3x, probably higher harmonics too.? Square wave!? These pop up after the first time I key the TX and remain. I'm running V50.2, metal chassis.? This appears in slightly different forms forms all bands, 160M-6M, but the spurs always appear at 25MHz .... I have other integration issues I have to resolve in the mean time, but what's up with this? Thanks Mark KU3O |
K9HZ
Tom Clifton
David Leckie