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Re: Schema: [BITX20] Interface
Eagerly waiting.... On Jul 5, 2017 4:41 PM, "Pavel Milanes Costa" <pavelmc@...> wrote:
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Re: Schema: [BITX20] Interface
Pavel Milanes Costa
El 04/07/17 a las 20:11, David Woodward escribi¨®:
(...) I also want CAT control of the Bitx40...all in one box...Be careful with what you wish... It may come true! Working on CAT control now, it's done already, but I'm fighting with a lot of delay() codes that spoils the serial communications. 73 Pavel CO7WT. |
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Re: Pins and colors
"Molex KK".? Or this kit:? On Wed, Jul 5, 2017 at 4:34 PM, Dexter N Muir <dexy@...> wrote:
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Re: Pins and colors
How did you do the removal? If you mangled the metal bits you're sunk, but still recoverable given fresh bits resurrected from cast-off wiring looms elsewhere. PC power supplies have them for 3.5" floppy drive power. If you're not up to that recovery, they can be bought - they're called "Molex connectors" (a brand, there are several/many different ones, but these ought to be available)- at your parts store. If you're really 'hip' and have the tool, you can crimp your wires back, but if not solder's good too - if you're encountering temperatures that melt solder you've got more worries than that! :) Good luck ... |
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Re: W8TEE TFT/VFO DDS adapter
¿ªÔÆÌåÓý? Jack ? Sorry to be a pest. Have you made any progress ? Thanks art From: [email protected] [mailto:[email protected]] On Behalf Of Jack Purdum via Groups.Io
Sent: Sunday, June 25, 2017 3:55 PM To: [email protected] Subject: Re: [BITX20] W8TEE TFT/VFO DDS adapter ? All: ? I've been buried lately: our hamfest was last weekend and FD was this weekend and as an officer of our club, I haven't had a moment to do anything on the B40 project. I will be working on it this week. ? Jack, W8TEE ? From: Art Olson via Groups.Io <olsonaj6927@...> ? Jack Resending this email ? Thanks? Art ?
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Re: Pins and colors
Don't cut it! Just label it. Use it power something. It won't work for a lot - the small plug is 'mini' where most 'phones etc. are 'micro' (hard to tell at just a glance) - but it should go in the 'junk box' (misc part bin) or hang up alongside all those cast-off IEC mains cables.
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Re: A Good Book
¿ªÔÆÌåÓýEMRFD sells for $49.95 plus shipping direct from the ARRL.? Those high priced volumes are probably remnants from when the book went out of print although it was still highly popular.? After many complaints and efforts by Wes Hayward and others the ARRL decided to publish it again and even threw in the CD with PDFs of the ¡±Intro to Radio Frequency Design¡± and ?¡°Solid State Design for the Radio Amateur¡± which were both out of print. Mike K5ESS ? From: [email protected] [mailto:[email protected]] On Behalf Of Andrew Krause ? Well, I found a copy - brand new softcover with cd-rom - on eBay for $46.11 after shipping. I don't think you're going to beat that - I've crosschecked all my sources. The next best price seems to be Abebooks.com for $80 shipped. Amazon is all over the place from $99 to $280. So it must be one hell of a book after all.? ? I'll know by next week :) ? On Wed, Jul 5, 2017 at 1:17 PM, Ken KM4NFQ <km4nfq@...> wrote: Greetings, One of the most compelling reasons to find a copy of Experimental Methods in RF Design is that there are bibliographical References at the end of each chapter. These References point to books and articles that are relevant to the material in each chapter. ? In lieu of a good bibliography, there is The Subject Guide to Books In Print. Most good PUBLIC LIBRARIES have a set of Books In Print. That, along with the INTERLIBRARY LOAN SERVICE of your local Public Library will allow you go further in depth on subjects of interest. No one book can cover everything adequately. However, EMRFD is a good start. Here is a pretty good electronics textbook: ? Regards, KM4NFQ ? ? On Wed, Jul 5, 2017 at 9:05 AM, Jack Purdum via Groups.Io <econjack@...> wrote: ?I suggest you download a sample chapter and see if the author's writing style is to your liking. Sometimes the Table of Contents and/or Index of the book is available. ? ?KM4NFQ
? Using Amazon to read the TOC, Index, and the reviews can lessen the risk of a disappointing book purchase. ? Jack, W8TEE From: Ken KM4NFQ <km4nfq@...> ? Hello Andrew, May I suggest that you go to your local PUBLIC LIBRARY and see if you can obtain any of the suggested titles, to see if any of them are suitable for what you want a GOOD BOOK for? I suggest using the Pubic Library's INTERLIBRARY LOAN service to obtain books that are not in your branch library's collection (if your library has an InterLibrary Loan Service?). Then, after you have read the book from the PUBLIC LIBRARY, and decided if you like it, and that it will be useful to you, then perhaps you can find a used or new copy at any of the book mongers, such as Alibris, Abebooks, Amazon, Biblio, or whatever, and purchase it. I posted the link to CHAPTER ONE of EMRFD because it is available as a download from the PUBLISHER of the book. Many publishers offer SAMPLE chapters for download. If you are not familiar with a book, I suggest you download a sample chapter and see if the author's writing style is to your liking. Sometimes the Table of Contents and/or Index of the book is available. I suggest taking a look at them as well if they are available for download. Books with a bibliography are also very helpful for further study.? My GOOD BOOK recommendations still stand:
Remember that ordering ANY book directly from the Publisher will ensure that all monies paid for the book will be distributed properly. ? The CD that comes with EMRFD (Classic Edition) has IRFD and Soild State Design for the Radio Amateur in PDF format, from the PUBLISHER. Both of those books are currently out-of-print. If you do not want those PDFs, then the CD in the back of any earlier edition of EMRFD will not have them included. Once again, CHAPTER ONE of EMRFD is available from the PUBLISHER at: ? One of the AUTHORS of EMRFD (Wes Hayward, W7ZOI) offers ERRATA for EMRFD at his site, where software updates are also available. ? Regards, Ken, KM4NFQ ? On Tue, Jul 4, 2017 at 5:14 PM, Andrew Krause <andrew.krause@...> wrote: I just want to say that I have a hard time with people posting PDF links to in-print material that is copyrighted. Someone worked very hard to create a text to educate others. They're entitled to profit from that. Furthermore, this knowledge has value, and is worth paying for.? ? It appears that this single chapter is made freely available, so no foul here. But the other day someone posted an entire scanned PDF of a book. What are the groups rules on this?? ? On Tue, Jul 4, 2017 at 4:50 PM Ken KM4NFQ <km4nfq@...> wrote:
-- ? ? ? ?
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Re: Schema: [BITX20] Interface
CAT control should be trivial.? There are numerous projects out there to emulate Icom or Kenwood rigs. Choose one you like and emulate that one.? On Tue, Jul 4, 2017 at 9:02 PM, David Woodward <kf4wbj2@...> wrote:
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Re: A Good Book
Well, I found a copy - brand new softcover with cd-rom - on eBay for $46.11 after shipping. I don't think you're going to beat that - I've crosschecked all my sources. The next best price seems to be Abebooks.com for $80 shipped. Amazon is all over the place from $99 to $280. So it must be one hell of a book after all.? I'll know by next week :) On Wed, Jul 5, 2017 at 1:17 PM, Ken KM4NFQ <km4nfq@...> wrote:
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Re: A Good Book
Ken KM4NFQ
Greetings, One of the most compelling reasons to find a copy of These References point to books and articles that are relevant to the material in each chapter. Here is a pretty good electronics textbook: These textbooks were written by Tony R. Kuphaldt and released under the . On Wed, Jul 5, 2017 at 9:05 AM, Jack Purdum via Groups.Io <econjack@...> wrote:
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Re: Strange noise
On Wed, July 5, 2017 19:07, Michael Davis wrote:
Well, I finished installing sketch 1.17.1, added the function switch, andDo you still hear this noise when the antenna is disconnected? Is it in both LSB as well as in USB mode? 73 Allard PE1NWL |
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Strange noise
Michael Davis
Well, I finished installing sketch 1.17.1, added the function switch, and did the PTT sense wire-up. All went well, all new functions work, but now I get a strange noisy loud interference from about 7215 to 7265. It almost sounds like some kind of oscillation, (not a squealing oscillation) It gradually starts at 7215 and gradually stops at 7265. It basically wipes out any signals in this part of the band. Any ideas? Suggestions?
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Re: BITX40 Sensitivity
YEP!? Had a QSO with a guy in Alabama, he was running 500W, I was running 5W. ?20M SSB. Says a lot- my rig probably cost less than his microphone. ($65 for a Bitx20 V3SBL1 and a junked SSB CB for the crystal filter) 73 Larry KB3CUF On Wed, Jul 5, 2017 at 9:31 AM, Raj vu2zap <rajendrakumargg@...> wrote: The term I heard is "alligators"! |
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Re: BITX40 Sensitivity
The term I heard is "alligators"!
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Show quoted text
Very big mouth and small ears! IMHO high power is useful in controlling a pileup or in bad condition skeds! Raj, vu2zap At 05/07/2017, you wrote:
I have a much simpler test for sensitivity. I have done careful research and decided that there are a lot more stations that I can hear than stations that can hear me! I wish the folks running the kilowatt transmitters would pay as much attention to the capabilities of their receivers (and ears) as they do to their transmitters. OK, I'll get off the soapbox now! |
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Re: si5351bx, a very small set of routines to handle the Si5351
Will come out with a v1 of those si5351bx routines with the following adjustments:
? ? PLLA will have an even integer divide, and integer mode bit set ? ? si5351bx_rdiv will become a 3 element array, one per CLK0,1,2 like si5351bx_drive[] ? ? more comments, better testbench with no need for tuning pot, just an i2c connection to an Si5351 and a C compiler ? ? initialize a few more registers, just in case ? ? check register contents against what SiLab's Clockbuilder software does No bugs found yet, version 0_0 seems to work fine. I doubt any of the above will have a noticeable effect on Bitx40 performance, but they could The new version should just cut and past into place with no adjustments, assuming you are not using si5351bx_rdiv Might be a week or more before an update happens.? I have a lot on my plate just now Jerry, KE7ER |
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Re: Interface
I pretty much did everything that Joe VE1BWV suggested for JT65. ? One additional note... one of the purposes of the 600/600 ohm transformers is to isolate the radio ground from the computer ground. ?To do that, ?the common (ground or sleeve ) connection of the 3.5 mm audio jacks that connect to the computer should not be connected to the radio ground. ?Since I built radio in an aluminum chassis, ?I cut out a hole in the chassis and mounted a small plexiglass piece over the hole and mounted the 3.5 mm jacks on the plexiglass to isolate them from the radio chassis.
I intended from the start to use the radio for JT65 only - ?since I only run about 2 W and wanted to get away from the "big rig" since I leave it on much of ?the time and log all the received call signs ?to PSK Reporter even when I am not actually trying to make contacts - sort of a beacon. ? I use the WSJTX software from Joe Taylor.? Hope this helps Greg KD4VV |
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Re: A Good Book
Jack Purdum
?I suggest you download a sample chapter and see if the author's writing style is to your liking. Sometimes the Table of Contents and/or Index of the book is available. ? ?KM4NFQ I agree totally. Many books sold on Amazon have a Look Inside banner on the cover. Clicking on that allows you to see parts of the book. I use that to examine the Table of Contents first, to see if the book at least touches on my interests. After the TOC, I check the index. Most of the books I buy are for reference and a good index is a must. Indeed, for my Beginning C for Arduino, I used special text markers for every entry to be added to the index...there were at least 500 entries. The publisher totally ignored them and the index is horrible. We had a heart-to-heart for the 2nd Edition's index. They still ignored some of my markers, but it's better.? Using Amazon to read the TOC, Index, and the reviews can lessen the risk of a disappointing book purchase. Jack, W8TEE From: Ken KM4NFQ <km4nfq@...> To: [email protected] Sent: Wednesday, July 5, 2017 8:18 AM Subject: Re: [BITX20] A Good Book Hello Andrew, May I suggest that you go to your local PUBLIC LIBRARY and see if you can obtain any of the suggested titles, to see if any of them are suitable for what you want a GOOD BOOK for? I suggest using the Pubic Library's INTERLIBRARY LOAN service to obtain books that are not in your branch library's collection (if your library has an InterLibrary Loan Service?).If you find that the title is NOT what you are looking for, then you have not wasted any money, and you won't have a book that you cannot use on your bookshelf. I suggest taking a look at to search all the book mongers for any title? (In-Print, Used) you are looking to purchase. The Art of Electronics 3rd Edition. Horowitz & Hill. (List: $120.00) Experimental Methods in RF Design (Classic Edition). Hayward, et al. (List: $49.95) I have the Revised First Edition. I have the 2nd edition of Practical Electronics For Inventors, but there are later editions available (4th edition - List $40.00). I have the 2005 edition of The ARRL HANDBOOK For Radio Communications, but there are later editions available (2017 edition - List: $49.95) Earlier editions have more homebrew projects in them? However, as with most older electronics projects, you may have trouble sourcing parts? Or, you can challenge yourself by updating an old project with newer parts? Whatever. Remember that ordering ANY book directly from the Publisher will ensure that all monies paid for the book will be distributed properly. The CD that comes with EMRFD (Classic Edition) has IRFD and Soild State Design for the Radio Amateur in PDF format, from the PUBLISHER. Both of those books are currently out-of-print. If you do not want those PDFs, then the CD in the back of any earlier edition of EMRFD will not have them included. Once again, CHAPTER ONE of EMRFD is available from the PUBLISHER at: One of the AUTHORS of EMRFD (Wes Hayward, W7ZOI) offers ERRATA for EMRFD at his site, where software updates are also available. You might find this page useful as well: where you can find?More on the EMRFD "First Transmitter" from Chapter 1. On Tue, Jul 4, 2017 at 5:14 PM, Andrew Krause <andrew.krause@...> wrote:
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Re: A Good Book
Ken KM4NFQ
Hello Andrew, May I suggest that you go to your local PUBLIC LIBRARY and see if you can obtain any of the suggested titles, to see if any of them are suitable for what you want a GOOD BOOK for? I suggest using the Pubic Library's INTERLIBRARY LOAN service to obtain books that are not in your branch library's collection (if your library has an InterLibrary Loan Service?).If you find that the title is NOT what you are looking for, then you have not wasted any money, and you won't have a book that you cannot use on your bookshelf. I suggest taking a look at to search all the book mongers for any title? (In-Print, Used) you are looking to purchase. The Art of Electronics 3rd Edition. Horowitz & Hill. (List: $120.00) Experimental Methods in RF Design (Classic Edition). Hayward, et al. (List: $49.95) I have the Revised First Edition. I have the 2nd edition of Practical Electronics For Inventors, but there are later editions available (4th edition - List $40.00). I have the 2005 edition of The ARRL HANDBOOK For Radio Communications, but there are later editions available (2017 edition - List: $49.95) Earlier editions have more homebrew projects in them? However, as with most older electronics projects, you may have trouble sourcing parts? Or, you can challenge yourself by updating an old project with newer parts? Whatever. Remember that ordering ANY book directly from the Publisher will ensure that all monies paid for the book will be distributed properly. The CD that comes with EMRFD (Classic Edition) has IRFD and Soild State Design for the Radio Amateur in PDF format, from the PUBLISHER. Both of those books are currently out-of-print. If you do not want those PDFs, then the CD in the back of any earlier edition of EMRFD will not have them included. Once again, CHAPTER ONE of EMRFD is available from the PUBLISHER at: One of the AUTHORS of EMRFD (Wes Hayward, W7ZOI) offers ERRATA for EMRFD at his site, where software updates are also available. You might find this page useful as well: where you can find?More on the EMRFD "First Transmitter" from Chapter 1. On Tue, Jul 4, 2017 at 5:14 PM, Andrew Krause <andrew.krause@...> wrote:
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Mark Phillips
Allard PE1NWL
Raj vu2zap