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Re: [AmateurRadioBuilders] Calibrate S meter?
开云体育Yeah… we need a calibration procedure for this too…? Looks like you have volunteered Jerry! ? ? 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 jerry-KF6VB
Sent: Sunday, February 9, 2025 11:44 AM To: [email protected] Cc: [email protected] Subject: [AmateurRadioBuilders] Calibrate S meter? ? I was just doing this for one of my other radios, and wondered: Is the S |
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Re: [AmateurRadioBuilders] V12 RF Board
开云体育That is on the “TO DO” list.? Since this is an open/ community project… I would ask that someone with a working radio… please step up… do this as a contribution to the project if… people want it in the short term. ??I know there are guys on channel that did this for a living… that could bang it out in about 10 minutes. ? ? 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 Tim via groups.io
Sent: Sunday, February 9, 2025 11:09 AM To: [email protected] Subject: [AmateurRadioBuilders] V12 RF Board ? I see lots of test points on the RF board, is there a list of expected voltages and signal data for each point somewhere? Trying to trouble shoot my RF board issues. Tim W4YN |
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Re: Excessive Noise
开云体育I’ve never had noise from an on-board source, but that doesn’t mean it couldn’t happen.? There is probably a solder bridge somewhere that is causing this… but keep it simple… to hone in on the area of the circuitry with the issue.? Oliver had some good input… if the clocks both look good… you can follow a calibrated input into the receiver front end… past the transformer (TP4), then past the attenuator and the gain stage (TP6)… if all that works there is only the mixer U1 and the filters at TP5 and TP3. ? Here is another great diagnostic tool that a lot of people forget about.?? You can take the RX I/Q output at J1 into your computer through the stereo input… load a SDR program like SDR Console and demodulate the signals as if it were the Main board.? [Note: this also means that with the addition of a simple software subroutine/ control module to the suite of existing provided modules in any of the SDR PC programs, anyone could build only the RF board and have a fully functional QRP Transceiver.? Other boards could be added to additional functionality]. ? ? 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 epif18 via groups.io
Sent: Sunday, February 9, 2025 9:43 AM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] Excessive Noise ? Thanks Bill, that sounds like a plan.? I just finished hooking up my sig gen to one of the antenna with an output of -40dbm and 60dbm of attenuation, 7MHz AM, RF gain set at 0 and I could see and hear the signal (faint).? So right now, I have a sensitivity of -100dbm.? I do want to hook up my old linear power supply to see if I have switcher noise too.? Just out of curiosity, if you have ever found noise in Main or RF, what do you think the cause may be? Thanks again, Mark KU3O |
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Re: Excessive Noise
开云体育Mark…. You can unplug everything except the MAIN and RF boards (and the front panel and encoders) and the radio should work by just placing a receive antenna on the RX IN on the RF board.? If you still hear the moise, obviously its contained to the MAIN, RF, Front Panel, and power supply. ? That’s the way I always trouble shoot my V12 radios… strip them down to the basics.?? I have 6 of them sitting in various states of together-ness… most for experimentation. ? ? 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 epif18 via groups.io
Sent: Saturday, February 8, 2025 9:28 PM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] Excessive Noise ? Hey Tim, Not yet.? I was tracing all the paths on the LPF control board to make sure I didn't have a problem with one of those 0179's.? I found a problem with the SWR xfmr in the tx path, so I fixed that, it had cut off rf output to 20W PA.? I put my nanoVNA on the antenna and got a good result on both RX and TX to and from RF board connections.? This was with everything installed.? This made the pulsating audio much better too.? When I pump several mV I/Q into the RX input on main, I get a good signal but the noise is still there.? I had replaced the ADC and resoldered all the SMA's on MAIN but no change.? Main is not generating noise as the noise goes away when I pull the RX I/Q in cable (silly, but I'm looking for the noise source). So what I saw was that raising the RF gain raises everything and increasing RX attenuation reduces everything.? I did do an RX CAL as recommended but no change.? I still need to look into that a little more. I have a single point ground, so I don't think there's a problem there.? I haven't hooked up a sig gen with a bunch of attenuators to see what the sensitivity really is. I need to get out of the basement and hook up to a full up antenna (in the garage!) and a good ground.? I could easily pick up W1AW on 40M in the basement with my V11 so I'm determined to get this figured out for the V12.? I don't have a cover on my case yet (metal chassis) but I have a hard time believing that noise is getting in given that all the connections are shielded.? I saw some traffic about noise coming from the display, but I waved my hand in there and there was no change in any signal. I need to rearrange my board positions which would shorten the power lines, coaxes and the BANDS cable. Hope is not a plan, but I'm hopin'. Mark KU3O |
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Re: Display Driver 3.3V ONLY board
开云体育Hang tight… I still have kit parts coming in from overseas… and I want to send a couple of these out to folks I know will pound on them to see if there are any holes to fill. ? ? 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 jjpurdum via groups.io
Sent: Friday, February 7, 2025 7:59 PM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] Display Driver 3.3V ONLY board ? How to order?? ? Jack, W8TEE ? On Friday, February 7, 2025 at 06:46:20 PM EST, K9HZ <bill@...> wrote: ? ? Another Friday share… The new Display Driver board.? This is the 3.3V ONLY board.? It’s the cheaper of the two options.? Use it of you don’t (and won’t) use 5V to power your display (if you will or do, use the other one).? ? Bare Board: ?
? Front side complete: ? Plugs into the “DISPLAY” connector on the right side of the MAIN board shown here:
? It can go on the bottom of the board too… just keep the SAME orientation of the driver board to the Main board but put the connectors on the opposite side of the boards (all three shown on the wrong side of the MAIN and Driver boards for use on the bottom of the MAIN board): ? ? 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: ? email:??bill@... ?
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Re: Display Driver 3.3V ONLY board
How to order?? Jack, W8TEE
On Friday, February 7, 2025 at 06:46:20 PM EST, K9HZ <bill@...> wrote:
Another Friday share… The new Display Driver board.? This is the 3.3V ONLY board.? It’s the cheaper of the two options.? Use it of you don’t (and won’t) use 5V to power your display (if you will or do, use the other one).? ? Bare Board: ?
? Front side complete: ? Plugs into the “DISPLAY” connector on the right side of the MAIN board shown here:
? It can go on the bottom of the board too… just keep the SAME orientation of the driver board to the Main board but put the connectors on the opposite side of the boards (all three shown on the wrong side of the MAIN and Driver boards for use on the bottom of the MAIN board): ? ? 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: ? email:??bill@... ? -- Jack, W8TEE |
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Display Driver 3.3V ONLY board
开云体育Another Friday share… The new Display Driver board.? This is the 3.3V ONLY board.? It’s the cheaper of the two options.? Use it of you don’t (and won’t) use 5V to power your display (if you will or do, use the other one).? ? Bare Board: ?
? Front side complete: ? Plugs into the “DISPLAY” connector on the right side of the MAIN board shown here:
? It can go on the bottom of the board too… just keep the SAME orientation of the driver board to the Main board but put the connectors on the opposite side of the boards (all three shown on the wrong side of the MAIN and Driver boards for use on the bottom of the MAIN board): ? ? 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: ? email:??bill@... ? |
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Show and Tell Friday #1
开云体育Just some Friday sharing… Here is a finished dual encoder board with 3D Printed knobs (all out on the GITHUB).? Replaced TWO encoders.? One ribbon cable from the encoder board to the Fron Panel Electronics (FPE) board (one of 8 possible FPE boards BTW!).?? I guess I should make a video of the combo AF/RF gain on one encoder…
? 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@... |
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Re: Display driver board reality
开云体育For that display… yes. ? ? 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 Phil Taylor via groups.io
Sent: Friday, February 7, 2025 2:26 PM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] Display driver board reality ? Well here are the logic levels in the Spec sheet ? ? VDDIO is clearly 3.3V, Max voltage 3.6. VDDIO Hi and 0.2VDDIO Low.? ? ? Regards |
K9HZ
jjpurdum
John P
K9HZ