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Re: Homemade Circuit Boards
Jack, W8TEE
Chuck Adams has a video on YouTube using "Muppet" PCB fabrication. It works well. Jack, W8TEE
On Monday, April 26, 2021, 4:09:01 PM EDT, jerry@... <jerry@...> wrote:
> I made a very big mistake on the choice of the footprint in Kicad for > relays. This sort of thing is a good argument for homemade circuit boards.? I used to do it with pcb-express.? I downloaded their software but did not order their boards.? I would print out the copper layers mirror image on a laser printer. Then iron the paper onto my copperclad board with a clothes iron.? The paper would be stuck to the board.? Then dunk it all in water and peel the paper off, hopefully leaving the toner on the board. ? Then dunk the board in ferric chloride etchant.? When it's etched, pull it out and scrub off the laser toner.? I use a Dremel mounted on a drill press fixture and little tiny drill bits ( used to be available in boxes really cheap at Harbor Freight, but no apparently longer alas ) to drill the through holes. ? ? The devil is in the details with this thing - lots of experimentation with different papers.? But I have successfully done 25-grid parts with it. ? The boards don't turn out nearly as nice as something from a board house, but you can design a board in the morning and have it in your hands the same afternoon. ? ? ? ? ? ? ? ? ? ? ? - Jerry KF6VB On 2021-04-26 10:18, Gerard wrote: > Hello, > > I made a very big mistake on the choice of the footprint in Kicad for > relays. Therefore, it cannot necessarily work. So I desoldered the > relays and so I¡¯m going to make an adapter to fix it. This is the > cleanest solution than cutting the tracks on the PCB > The relay will be offset by 2.54 mm and the connection of the shot > will be corrected. > Only drawback we will see the support on 2.54mm, but it is the best > solution. > > I read that we can add a protective diode on K1, can you tell me where > exactly > > cdt > > > > Links: > ------ > [1] /g/BITX20/message/87917 > [2] /mt/79553656/243852 > [3] /g/BITX20/post > [4] /g/BITX20/editsub/243852 > [5] /g/BITX20/leave/10189903/243852/952924773/xyzzy -- Jack, W8TEE |
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Re: Best wishes to our friends in India
Jack, W8TEE
For those who don't know, Farhan and Gordon Gibby did Herculean work to develop a working ventilator that could be produced for about $200. Then, the FDA stepped in with massive amounts of paper work and pretty much buried things under that paper mountain. Like Friedman once said, the FDA likely has killed more people than it saved because of its knee-jerk reaction to the Thalidomide drug in the 50's and the delays that resulted from it. Jack, W8TEE
On Monday, April 26, 2021, 9:06:34 PM EDT, Robert D. Bowers <n4fbz@...> wrote:
I saw a little while ago that equipment to produce medical O2 is also being sent.? That will make a big difference, and I'm tickled at the doses being sent. Ventilators, on the other hand, were being dumped - in Miami.? I hope that stops and they're redistributed to the other countries that need them.? The image I saw suggests that they should be salvageable (still in boxes/cases and on pallets) - and they too save lives. It looks like we're pulling together - and that makes me relieved. Those that need help should get it. Ashar, tell everyone you can that we're pulling for you all! On 4/26/21 6:50 PM, Bill Cromwell wrote: > Hi, > > The U.S. is sending about 50 or 60 million doses of the vaccine, an > unspecified amount of oxygen, and personal protective gear to India. I > didn't catch all of what they said on the news. On one of my military > newsfeeds I saw that Mexico is sending materials to help India with > the covid, too. The cavalry is mounting up. > > My best wishes and prayers for everybody over there. > > Bill KU8H > > bark less - wag more > > On 4/26/21 3:40 PM, Arv Evans wrote: >> Farhan >> >> Got my second Covid shot last week. >> >> News in the US says that Biden is sending our stock of AstraZeneca >> vaccine >> to India.? Not sure when though. >> >> Please be careful.? We are waiting for that SDR rig. >> >> Arv >> _._ >> >> >> >> On Mon, Apr 26, 2021 at 11:42 AM Ashhar Farhan <farhanbox@... >> <mailto:farhanbox@...>> wrote: >> >> ??? thanks all, i wish there was a hack that could fix it. some of us >> ??? here even tried. i worked with a few really fabulous? hams to >> ??? develop an open source ventilator project that got jammed in some >> ??? red-tape. the ventilators are moot right now. what we needed was >> ??? to have everyone vaccinated well in time. we wasted it on petty >> ??? politicking and haggling away. the vaccine manufacturers were give >> ??? a very raw deal and they had to wind down their capacity at a time >> ??? like this. anyway, this is not a forum for this discussion. >> ??? The interesting part is the science of it. Very very few of those >> ??? vaccinated caught the second wave. those that did, (like over >> ??? ex-prime minister Man Mohan Singh who is 88 years old and has had >> ??? a heart infarct a few months ago), survived with very mild >> ??? disease. so look at the data coming out in the Nature, the Lancet, >> ??? etc. and decide for yourselves. Much like we read the datasheets >> ??? of our devices. it is not different at all. It is even fun! >> ??? - f >> >> ??? On Mon, Apr 26, 2021 at 10:19 PM Jack, W8TEE via groups.io >> ??? <> <jjpurdum=[email protected] >> ??? <mailto:[email protected]>> wrote: >> >> ??????? Farhan: >> >> ??????? Know that you and the others are in our thoughts and prayers. >> >> ??????? 73, >> ??????? Jack, W8TEE >> >> ??????? On Monday, April 26, 2021, 11:27:37 AM EDT, Ashhar Farhan >> ??????? <farhanbox@... <mailto:farhanbox@...>> wrote: >> >> >> ??????? Peeps >> ??????? The situation has been very depressing. It could have been >> ??????? handled much much better. The second wave has hit some of the >> ??????? cities very badly. They are out of beds, oxygen, drugs and >> ??????? vaccines. >> ??????? We lost many hams as well. Bhogi, who was probably a quiet >> ??????? member of this forum, died last week as did slokapriya, who >> ??????? also ran radiojitter.com <>. >> ??????? People seem to have given up on distancing and keeping >> ??????? indoors. It is a bizzare situation. >> ??????? HF signals is working skeletally. I am fully locked up along >> ??????? with my family at home. We are a large house with 9 people. We >> ??????? play board games, carroms, bridge, read to each other and i am >> ??????? working on the SDR. >> ??????? My partner and the man dude of HF Signals, Ehsan, is just >> ??????? recovering from a mild bout of Covid. Others are doing good. >> ??????? Thanks for your concerns and we hope to see you all in the >> ??????? other side of this nightmare soon. >> ??????? Keep the solder burning, stay safe. Use science to fight this. >> ??????? 73, f. >> >> ??????? On Mon 26 Apr, 2021, 7:48 PM Jerry Gaffke via groups.io >> ??????? <>, <jgaffke=[email protected] >> ??????? <mailto:[email protected]>> wrote: >> >> ??????????? The news from India has been on my mind as well, check out >> ??????????? the graph at the top: >> >> <> >> >> ??????????? As the article suggests, the US could choose to better >> ??????????? support other nations in this. >> >> ??????????? Jerry, KE7ER >> >> >> ??????????? On Mon, Apr 26, 2021 at 05:09 AM, Tom, wb6b wrote: >> >> ??????????????? I see in the news that India is having a severe >> ??????????????? outbreak of Covid. Hope all is well for Ashhar and all >> ??????????????? our group members in India. >> >> ??????????????? Tom, wb6b >> >> >> ??????? -- ??????? Jack, W8TEE >> > > > > > -- Jack, W8TEE |
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Re: Best wishes to our friends in India
I saw a little while ago that equipment to produce medical O2 is also being sent.? That will make a big difference, and I'm tickled at the doses being sent.
toggle quoted message
Show quoted text
Ventilators, on the other hand, were being dumped - in Miami.? I hope that stops and they're redistributed to the other countries that need them.? The image I saw suggests that they should be salvageable (still in boxes/cases and on pallets) - and they too save lives. It looks like we're pulling together - and that makes me relieved. Those that need help should get it. Ashar, tell everyone you can that we're pulling for you all! On 4/26/21 6:50 PM, Bill Cromwell wrote:
Hi, |
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Re: Best wishes to our friends in India
Hi,
toggle quoted message
Show quoted text
The U.S. is sending about 50 or 60 million doses of the vaccine, an unspecified amount of oxygen, and personal protective gear to India. I didn't catch all of what they said on the news. On one of my military newsfeeds I saw that Mexico is sending materials to help India with the covid, too. The cavalry is mounting up. My best wishes and prayers for everybody over there. Bill KU8H bark less - wag more On 4/26/21 3:40 PM, Arv Evans wrote:
Farhan |
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Re: Talk: Does price buy Performance or Satisfaction in an HF Transceiver? by Frank Howell K4FMH
I'll leave it to the experts to discuss performance. But, as far as satisfaction goes...
There's nothing like he thrill of making a QSO on a rig that you built yourself and being able to proudly proclaim "The rig here is homebrew.". I can tell you from experience that on SSB at least the other side rarely believes it? 73, Dean KK4DAS
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Re: Shipping Question
¿ªÔÆÌåÓýI guess snails can be sent by rocket.? That's some rapid delivery! Gerry Sent by the Thunderbird On 2021-04-26 4:38 p.m.,
f.ketterman@... wrote:
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Re: Shipping Question
¿ªÔÆÌåÓý
Okay, Frank and Curt.
That gives me some idea.? Your response is greatly?appreciated.
73,
Bob
From: [email protected] <[email protected]> on behalf of f.ketterman@... <f.ketterman@...>
Sent: Monday, April 26, 2021 4:38 PM To: [email protected] <[email protected]> Subject: Re: [BITX20] Shipping Question ?
I don¡¯t know if all will go this way, but I ordered a uBIX v6 from Ashhar (HF Signals) on 22 Feb 2021, received notice of shipping via DHL on 23 Feb 2021 and had it in hand on 25 Feb 2021.? Way faster than I was expecting.? Just my experience. ? Frank Ketterman AC0XV ? From: [email protected] <[email protected]> On Behalf Of
Curt via groups.io ? Bob |
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CW detector
You might want to look at the data sheet for? the Texas Instrument LM567 IC.? This is actually primarily designed as a DTMF tone decoder, but seems to have a lot of other uses.? The web address is:
This will save the trouble of searching for it.? It's a .PDF file, and the IC is available in a standard DIP package. 73 Gerry Sent by the Thunderbird |
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Re: Shipping Question
¿ªÔÆÌåÓýI don¡¯t know if all will go this way, but I ordered a uBIX v6 from Ashhar (HF Signals) on 22 Feb 2021, received notice of shipping via DHL on 23 Feb 2021 and had it in hand on 25 Feb 2021.? Way faster than I was expecting.? Just my experience. ? Frank Ketterman AC0XV ? From: [email protected] <[email protected]> On Behalf Of Curt via groups.io
Sent: Monday, April 26, 2021 16:11 To: [email protected] Subject: Re: [BITX20] Shipping Question ? Bob |
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Re: Shipping Question
Bob
They use excellent shipping resources. Its a long way from there to your qth. Also the pandemic is hitting them much much harder than many of us. I suggest trusting it will arrive, this ain't like in shipment within US or EU. If they have a tracking number it would pretty much say it was shipped, and next thing we see is delivery. Oh to ND, wow probably a few days faster than getting to me in Central MD (-: Curt wb8yyy |
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Shipping Question
Hi, All,
Just wondering...From the time you ordered the uBITX, how much time elapsed until you received the package?? Were you sent tracking information? I didn't find a place on the website to add the funding for faster shipping, so I figured I could wait.? I certainly and not lacking things to do!? Hi. If anyone could enlighten me, I would appreciate it. TNX & 73, Bob KK0MG Pisek, North Dakota. |
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Talk: Does price buy Performance or Satisfaction in an HF Transceiver? by Frank Howell K4FMH
Talk: Does price buy Performance or Satisfaction in an HF Transceiver?Frank Howell K4FMH presents a fascinating insight into our modern HF rigs looking at their price, their performance as measured by Rob Sherwood and reviews on eham.net.
Do you get what you pay for??Are expensive transceivers really worth it? Join us on this presentation to find out. ?
Frank has an enthusiasm for electronics and radio that spans over six decades. He serves as the ARRL Assistant Director (Delta Division) and is an ardent amateur radio podcaster and journalist.
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Tuesday 27th April 2021, 1900 UTC
?
This event is hosted on Zoom:??Meeting ID: 773 073 0073 (No passcode)
Also, live streaming on YouTube ? ?
(Bury Radio Society, with Warrington ARC) 73 Trystan G0KAY |
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Re: Homemade Circuit Boards
Vince Vielhaber
On 04/26/2021 04:18 PM, jerry@... wrote:
On 2021-04-26 13:12, Gordon Gibby wrote:Somewhere around here I still have a tube of that transparent plastic and a package or three of the parts stickers and tape. The light table is long gone tho.maybe another good idea is to somehow print a life-sized copy (aAn especially good idea would be to print it out on transparent stock. Vince. -- K8ZW |
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Re: Homemade Circuit Boards
On 2021-04-26 13:12, Gordon Gibby wrote:
maybe another good idea is to somehow print a life-sized copy (aAn especially good idea would be to print it out on transparent stock. Back in the old days before CAD, designers would lay out their boards by laying physical tape on transparent plastic. Then they would put the layers of plastic together and laboriously check every connection. As a firmware guy, I would watch the hardware engineers do that. I was not jealous. I still remember the time Joe did a board with the motherboard connector mirror-imaged. That prototype got a LOT of little green wires. - Jerry KF6VB On Mon, Apr 26, 2021 at 4:09 PM jerry@... <jerry@...> wrote:Links:I made a very big mistake on the choice of the footprint in Kicadforrelays.This sort of thing is a good argument for homemade circuit boards. |
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Re: Homemade Circuit Boards
maybe another good idea is to somehow print a life-sized copy (a photo) of the board and compare the parts to it? > I made a very big mistake on the choice of the footprint in Kicad for |
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Homemade Circuit Boards
I made a very big mistake on the choice of the footprint in Kicad forThis sort of thing is a good argument for homemade circuit boards. I used to do it with pcb-express. I downloaded their software but did not order their boards. I would print out the copper layers mirror image on a laser printer. Then iron the paper onto my copperclad board with a clothes iron. The paper would be stuck to the board. Then dunk it all in water and peel the paper off, hopefully leaving the toner on the board. Then dunk the board in ferric chloride etchant. When it's etched, pull it out and scrub off the laser toner. I use a Dremel mounted on a drill press fixture and little tiny drill bits ( used to be available in boxes really cheap at Harbor Freight, but no apparently longer alas ) to drill the through holes. The devil is in the details with this thing - lots of experimentation with different papers. But I have successfully done 25-grid parts with it. The boards don't turn out nearly as nice as something from a board house, but you can design a board in the morning and have it in your hands the same afternoon. - Jerry KF6VB On 2021-04-26 10:18, Gerard wrote: Hello, |
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Re: Best wishes to our friends in India
Farhan Got my second Covid shot last week.? News in the US says that Biden is sending our stock of AstraZeneca vaccine to India.? Not sure when though. Please be careful.? We are waiting for that SDR rig. Arv _._ On Mon, Apr 26, 2021 at 11:42 AM Ashhar Farhan <farhanbox@...> wrote:
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Re: Best wishes to our friends in India
Ashhar,
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I wish you all the best.
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Hopefully the rest of the work will realize we still have to adhere to safe practices even though vaccines have been released and don't hesitate to get vaccinated.
?
Mike N2MS
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Re: The "COCORICO UBITX" The French Touch
On Mon, Apr 26, 2021, at 12:21 PM, Gerard wrote:
I read that we can add a protective diode on K1, can you tell me where exactlyGerard, I put back-to-back diodes between pins 12 and 16 of the schematic (be careful as I have been told that does not agree with common pin numbering for the relay).? This is to protect Q90 from external RF sources while in receive mode.? Here is the K1 portion of the v6 schematic (all of the versions are the same in this area). Unless you are asking about the kickback diode protection for the relay coil.? That is D7 above. 73 Evan AC9TU |
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Re: Best wishes to our friends in India
My wife and I have lost six people we knew and used to see regularly - directly due to COVID-19.? Students in my department lost parents and family members... unexpectedly because they were in good health and "not that old".? If I remember right, one (maybe more) lost both parents in a very short time due to COVID-19.
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I'm glad that the vaccines are out and effective (especially for preventing deaths and serious cases).? I do wish that the vaccines and materials used to make them were more available to other countries, like India.? This is a global issue and we need to think globally in fighting it.? We can't think just about ourselves anymore (individually and as a community/state/nation)!? The ban on exporting the raw materials used to create the vaccine needs to stop!? (Likewise the destruction of materials and equipment meant to help fight it - as seen in news reports lately.) IMO, Amateur Radio could help... keeping the spirits up of those trapped at home and helping to get information in and out of areas that have limited communications.? We should work to this end - focus on that idea. I have been aware of the case loads and death tolls around the world.? We also should model good practices - wearing masks properly when in public.? (I rarely see people wearing them properly when going to the store - and many people refusing to wear them for political or religious reasons.)? If we can help keep people from spreading the disease, we will have done a good thing! Bob N4FBZ On 4/26/21 12:32 PM, Gerard wrote:
Hello, |
Trystan G0KAY
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