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Re: Noise Floor
I changed the check for negative values some time ago...not sure why it was changed back. I prefer to have the noise floor sitting just a smidge above the horizontal axis. I'll look into this. Jack, W8TEE
On Saturday, April 12, 2025 at 02:11:26 PM EDT, epif18 via groups.io <epif18@...> wrote:
Hey 'yall,
I'm still working off a 2' wip in the basement, so not the best environment.? Lots of noise on 20M but still picking up 4's and 5's !!!? Anyhow, I may misunderstand what the book (3rd ed) is saying but when I adjust the noise floor, the spectrum goes UP and the waterfall colors get more out of wack (my opinion).? I mod'ed the code to allow the Noise Floor to go negative and it does what I was hoping/expecting/understanding.
Is there something here I don't understand?? Do I misunderstand what the book is saying? I'm running the latest 66.9, v12.? I'm still working my noise problems.
Thanks
Mark
KU3O
-- Jack, W8TEE |
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Noise Floor
Hey 'yall,
I'm still working off a 2' wip in the basement, so not the best environment.? Lots of noise on 20M but still picking up 4's and 5's !!!? Anyhow, I may misunderstand what the book (3rd ed) is saying but when I adjust the noise floor, the spectrum goes UP and the waterfall colors get more out of wack (my opinion).? I mod'ed the code to allow the Noise Floor to go negative and it does what I was hoping/expecting/understanding.
Is there something here I don't understand?? Do I misunderstand what the book is saying? I'm running the latest 66.9, v12.? I'm still working my noise problems.
Thanks
Mark
KU3O |
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Re: FYI...
¿ªÔÆÌåÓýYes i will send your order along to Andy with a copy to you. ?Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com email:??bill@... ? On Apr 12, 2025, at 1:56?AM, Garry via groups.io <m3ngc@...> wrote:
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FYI...
¿ªÔÆÌåÓýI do have part of my new system for invoicing for boards and kits up and running.? Invoices for will come to you from Paypal and have the email address sales@....? Please don¡¯t ignore them!? After 5 days I will cancel them and you go to the back of the line again. ? ? 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: Cheap isolation transformers
¿ªÔÆÌåÓýThese are not perfect, but they do work and they are cheap. ? ? 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 Tim via groups.io
Sent: Friday, April 11, 2025 6:25 PM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] Cheap isolation transformers ? Tnx Dr. Bill? I had to use some on the 4SQ kit for audio to phones and speaker.? I also got them off AMZ however they were bare xformers.? The RatShack ones I had created lots of loss, ones I found did not. Tim W4YN |
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Re: Boards and kits in the UK/EU
¿ªÔÆÌåÓýHere is the price list for the USA.? It lacks shipping expense, but you can us it as a gauge¡ ? ? ? 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 Andy Rutter
Sent: Friday, April 11, 2025 5:20 PM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] Boards and kits in the UK/EU ? I have created a spreadsheet for you to express interest in boards and kits from Bill, K9HZ.? There are currently no prices on the spreadsheet as these will depend on the quantity requested from K9HZ. ? Download the spreadsheet, fill in your callsign and email address plus a quantity for each item of interest and then email to me - g8hck@.... Please don't send to the group. ? ? -- ? Andy, g8hck |
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Boards and kits in the UK/EU
¿ªÔÆÌåÓýFor those of you in the UK/EU¡ Andy Rutter, G8HCK, has graciously agreed to distribute T41/ K9HZ/ K9HZ-KI3P boards and kits there.? I¡¯ll attempt to ship him a load of stuff and he will make arrangements to ship to you. ? In the short term, you should give him your order and at a time in the near future¡ he can forward the combined order for me to ship to him.? You can contact him at:? arutter@... ? ? 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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Cheap isolation transformers
¿ªÔÆÌåÓýI ran across something that I need to share.? I bought a two-pack of audio transformers on Amazon that work very well for the cost.? Works great to break ground-loop issues, hum, etc.? Cheap too¡ and a WHOLE LOT cheaper than the ElectroVoice transformers I usually buy at $225 each with my RE20¡¯s!? Tried it on my T41 and it does clean up the mic.? Not perfect but cheap. ? ? I have an audio board on the drawing board and it includes cheap open frame (full audio range audio) isolation transformers ? ? 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: JLCPCB Price Increase
¿ªÔÆÌåÓýYeah.? I found that out. ? ? 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 John Owens K1JO via groups.io
Sent: Friday, April 11, 2025 11:34 AM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] JLCPCB Price Increase ? Copilot stated: Section 321 of the Tariff Act of 1930, which allows duty-free entry for goods valued at $800 or less (known as the "de minimis" exemption), has recently undergone changes regarding imports from China. As of April 2, 2025, the U.S. government has ended duty-free treatment for low-value imports from China and Hong Kong2. This means that goods previously eligible under Section 321 will now be subject to duties and standard customs procedures. This policy change is part of broader efforts to address trade concerns and enforce stricter regulations on imports from China. |
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Re: JLCPCB Price Increase
Copilot stated: Section 321 of the Tariff Act of 1930, which allows duty-free entry for goods valued at $800 or less (known as the "de minimis" exemption), has recently undergone changes regarding imports from China. As of April 2, 2025, the U.S. government has ended duty-free treatment for low-value imports from China and Hong Kong2. This means that goods previously eligible under Section 321 will now be subject to duties and standard customs procedures. This policy change is part of broader efforts to address trade concerns and enforce stricter regulations on imports from China. |
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Re: JLCPCB Price Increase
¿ªÔÆÌåÓýAs it happens, I got a stuffed board quote for a commercial project I¡¯ve been working for a branch of the government yesterday that, a month ago the estimate was just north of $65K.? Chinese company that I do a lot of business with.? The new quote was almost $100K more than the original estimate and was only good for 24 hours.? Luckily, for me, this contract is a Time and Materials Agreement.? The client still wants to go forward. ?Progress never stops, but it may cost a little more until this tariff stuff gets worked out. ? ? 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 jjpurdum via groups.io
Sent: Friday, April 11, 2025 7:49 AM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] JLCPCB Price Increase ? As someone else pointed out, the de minimis provision of Section 321 of the Tariff Act of 1930 exempts the first $800 of an order. David Cripe, who lead the T41 effort by 4SQRP found that out the hard way. If they had shipped the assembled boards in multiple small lots, they would have saved almost $4,000! ? Jack, W8TEE ? On Friday, April 11, 2025 at 07:13:21 AM EDT, Greg KF5N via groups.io <greg.electricity@...> wrote: ? ? I checked PCBWay this morning and the price hasn't changed.? But I assume that price does not include the US import duty. ? -- 73 Greg KF5N
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jjpurdum
K9HZ
Garry
John Owens K1JO