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Re: AGC performance
Jack Purdum
Wow! Thanks for providing the links to this. I've spent a lot of time with Google on this and these never showed up. It looks very interesting. Jack, W8TEE From: Ashhar Farhan <farhanbox@...> To: [email protected] Sent: Monday, February 27, 2017 12:54 AM Subject: Re: [BITX20] AGC performance RF, any day. Look at the W7ZOI's cascode IF amplifier. It is the best in the class.? This is the baby :? It is a little elaborate, but completely worth the effort.? Go here for the PCBs :? - f On Mon, Feb 27, 2017 at 9:39 AM, Jack Purdum via Groups.Io <econjack@...> wrote:
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Re: Delivery times to Canada
Graham
Ordered mine towards the end of January, received on Feb 24.
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cheers, Graham ve3gtc On 2/25/2017, "Randy Hall" <listk7age@...> wrote:
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Re: No uploads - support replied
Graham
good day all,
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I don't think attachments should go. They are an important and intuitive part of using groups like this. Adding attachments are easy and having them right there with the email and I can save those I want to keep. It is far better than the Yahoo model where you had to go to yahoo to view the attachments. I think we are in general missing the real issue. This group has bumped up against that limit more than once. The "limit" is the issue not what we should or shouldn't keep. Once you start trying to trim away some of "fat" you will end up constantly chasing your tail around trying to "purge" and the more you do the more reluctant you get to delete anything. Todd and others have already suggested that the group fund itself in order to support more storage space but there seems to the be an underlying unspoken hesitation of many. If I belong to 10 (or more) such groups on io and I contributed $1 per year in order support the cost of extra storage then I would consider that $10 well spent, not only do I benefit but so do others, perhaps those others will benefit even more than I, so much the better. Hans, Ashar - I think this is the direction the group needs to move toward, not this round robin fussing over what bits of "stuff" to get rid of every time the group reaches it's limit. There have been a couple of suggestions of how the group can manage this but it doesn't appear as though there has actually been any movement in getting there. Perhaps IO groups needs to consider implementing some business model so that groups such as this can easily pay for more storage. respectfully, cheers, Graham ve3gtc On 2/27/2017, "Hans Summers" <hans.summers@...> wrote:
Hi Ken |
Re: source code for the bitx40 radiuno?
Stephan Lauffer
...reply to myself... this may be the source(?)..:
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If so, would be nice if there would be a short link from for example. Am 27.02.2017 um 12:25 schrieb Stephan Lauffer: Hi all! --
Liebe Gruesse, with best regards, Stephan Lauffer Telefon: +49 7661 905216 Mobile: +49 172 7145197 Ham Radio: DC8LZ, QTH JN37XX Schulstr. 1c 79252 Stegen Germany |
source code for the bitx40 radiuno?
Hi all!
I am new in the ham world (got my license 7 days ago) and atm I am waiting to get my 1st kw transceiver, the bitx40. Meanwhile I try learn, read, understand parts of the bitx. ATM I am interested in the "raduino-bitx-magic". On the website www.hfsigs.com I read f.e.: "The Raduino...free and open source code,..." "The Raduino is a very powerful, hackable, easy to program board that My question is: Where can I get this open source code? Is there a github repo out there with this opensouce code for the bitx? And thanks to all for the contributions! I like the idea of the new wiki very much. Hopefully it will grow... :) -- Liebe Gruesse, with best regards, Stephan Lauffer Telefon: +49 7661 905216 Mobile: +49 172 7145197 Ham Radio: DC8LZ, QTH JN37XX Schulstr. 1c 79252 Stegen Germany |
R: Re: [BITX20] AGC performance
Giovanni Caracuta
Hi, has anyone tried this? I hav' nt yet! 73 de i7iwn
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Re: Speaker 3" round, What size speaker sounds good with your Bitx40 audio output?
you might try small ones that come on moderately sized LCD TV ?approximately 4 x 2.5inch or 3 x 1.5 etcOn Mon, Feb 27, 2017 at 6:25 AM, Fred Finster via Groups.Io <wb7odyfred@...> wrote:
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Regards
Sarma ? |
Re: No uploads - support replied
Hi Ken Yes agreed, attachments should go... it can safely be assumed that the sender didn't particularly intend these to be stored for ever. BUT, deleting attachments is not easy. I asked the owner and he told me that we have to go through the messages and delete the attachments. That doesn't seem very practical. I will email him again now and ask for some tool to do that. 73 Hans G0UPL |
Re: AGC performance
RF, any day. Look at the W7ZOI's cascode IF amplifier. It is the best in the class.? This is the baby :? It is a little elaborate, but completely worth the effort.? Go here for the PCBs :? - f On Mon, Feb 27, 2017 at 9:39 AM, Jack Purdum via Groups.Io <econjack@...> wrote:
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Re: Getting stuck
Jack Purdum
Erik: At several places in your code you have if expressions like: ? ? if (vfo >= 10000000L & tbfo != "USB") A single ampersand is the bitwise AND operator but you probably want the logical AND operator, which is &&. My unit is in pieces so I can't test it, but see if that makes a difference. Also, it appears that a button push changes the increment by a multiple of 10. Could this switch statement block : ? ? switch (radix) ? ? { ? ? ? case 10: ? ? ? ? radix = 100; ? ? ? ? break; ? ? ? case 100: ? ? ? ? radix = 1000; ? ? ? ? break; ? ? ? case 1000: ? ? ? ? radix = 10000; ? ? ? ? break; ? ? ? case 10000: ? ? ? ? radix = 100000; ? ? ? ? break; ? ? ? case 100000: ? ? ? ? radix = 10; ? ? ? ? break; ? ? } be replaced with: ? ? radix *= 10; ? ? ? ? ? ? ? ?// Multiply by 10 ? ? if (radix > 100000L) ? // Too big? ? ? ? ? radix = 10; ? ? ? ? ? ? // Wrap around to start value Also, my Fast Tune could be substituted, thus doing away with the button on pin 11. (I think I've already posted the code here.) Finally, use Ctrl-T in the Arduino IDE to reformat your code to a more common style. Sometimes that makes debugging easier. Jack, W8TEE From: Eric Torraca <eric.torraca@...> To: [email protected] Sent: Sunday, February 26, 2017 5:52 PM Subject: [BITX20] Getting stuck Good evening folks. I'm hoping someone out there can give another assist with the Arduino code. I'm getting pretty frustrated with this thing and I just can't find the part(s) of the code I'm getting wrong. I'm sure it's something basic. I just can't see it. I'm working with a non-raduino Bitx40 (#80!) and am trying to tune it with an Adafruit Si5351, rotary encoder, and a Arduino nano. I'll attach code, taken from AK2B's blog, below. The two issues I'm having are: 1) I cannot seem to put the right numbers in the code to get the rig on frequency. I've measured my Bix40 BFO at around 11.97MHz, so the Si5351 should be running around 4.97MHz on clock 0 correct? No matter where I put those numbers I cannot get in the band. I was able to receive signals today but there was nothing I could find that would give me a good fix. It's pretty much deaf to the LC VFO for the 40 DC receiver I've got in parts on the desk next to it. This is beginning to drive me up a wall. 2) while you all were kind enough to help before, and the frequency readout on the LCD does change when the encoder is turned, the actual frequency does not until the button that changes the increment is pushed (the encoder does not have an integral button). I've tried adding the display_frequency() command in a couple places (as you can probably see below) to see if the sequence made a difference, but it doesn't seem to change the behavior.? So those are the issues. Like I said, I'm sure I'm betraying my ignorance of something simple, but I've run out of ideas at this point. The code below is probably as much an illustration of that as could be. My apologies to it's original author. 73 de KB1VNA Eric |
Re: Getting stuck
I am not able to open the code you posted. Says can't open sketch. Does this part of the Raduino code make any sense, and help at all? #define INIT_BFO_FREQ (1199800L) unsigned long baseTune = ?7100000L; unsigned long bfo_freq = 11998000L; LSB: The VFO frequency is subtracted from the BFO. Suppose the BFO is set to exactly 12 MHz ?* and the VFO is at 5 MHz. The output will be at 12.000 - 5.000 ?= 7.000 MHz |
Re: AGC performance
Jack Purdum
Thanks to both of you. Again, I'm not an EE so I'm just trying to learn. Which is better: AGC on the audio chain or AGC on the rf chain. I think audio seems simpler, but is it better? I honestly don't know enough to judge. Jack, W8TEE From: Darryl Harvey <darryl@...> To: [email protected] Sent: Sunday, February 26, 2017 10:59 PM Subject: Re: [BITX20] AGC performance here it is Jack,
http://bitxhacks.blogspot.com.au/2016/11/agc-for-bitx.html
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On 2017-02-27 02:55 PM, Jack Purdum via Groups.Io wrote:
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Re: AGC performance
here it is Jack, http://bitxhacks.blogspot.com.au/2016/11/agc-for-bitx.html ? ? On 2017-02-27 02:55 PM, Jack Purdum via Groups.Io wrote:
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Re: AGC performance
The original is here? Search for the Gian's updated circuit in the messages. - f On Mon, Feb 27, 2017 at 9:25 AM, Jack Purdum via Groups.Io <econjack@...> wrote:
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Re: AGC performance
Jack Purdum
I've missed Ashhar's circuit. Where is it? Jack, W8TEE From: "pierre@..." <pierre@...> To: [email protected] Sent: Sunday, February 26, 2017 6:30 PM Subject: Re: [BITX20] AGC performance Dear All, I may have missed this information in the flow of Bitx posts: Has anyone compared the performance of Asshar's AGC circuit against that of Peter's (VK3YE) AGC circuit using the LED + LDR. If so, how did they compare ?? Best regards, Peter VK1XP On 27-02-2017 10:05, Allard PE1NWL wrote: > I followed KV4QB?s advice and put a 10uF between 1 and 8 on the LM386. > It got the audio up again. The AGC is somewhat working, but strong > signals are still quite loud. > Any ideas how this could be improved? > I also noticed there is now an extra 10K resistor (in series with the > diode) in the updated schematic, it?s not present in Asshar?s original > design. > Why has this been added? > > 73, Allard PE1NWL > > |
Re: No uploads - support replied
There's 553 MBytes of photos. ? Photos take up the most of the space. ?All but the last month of that is up on Yahoo. ?I suggest all photos get archived in case Yahoo disappears, then remove everything older than a year. ?And we maybe show a bit of restraint going forward. > ?It might also be worthwhile to consider combining "photos" and "files" into one section.A photo is just a file, a document like any other form. I'm not sure there's a reason to distinguish between JPG documents and PDF, DOC, XLS, or any other type. True enough. ?Except that PDF's, DOC's, and XLS are almost always much more informative. |
Re: No uploads - support replied
Ed Vignati
I'm with you Todd ? ? ? Eddie ? kj4fgi On Sun, Feb 26, 2017 at 10:10 PM, Todd K7TFC <k7tfc@...> wrote:
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Re: No uploads - support replied
Since I haven't heard anything about the funding idea I posted before on this subject, I thought I'd re-post it in case it didn't actually go out the first time (with some emphasis added): There is at least one online service for making contributions to creators of web content. It's called Patreon. . The minimum contribution is $1.00 USD. It's used by a lot of YouTube creators and other artists, writers, etc. Dave Jones of EEVBLOG uses it. Either Farhan or Hans could set it up. Out of more than three thousand subscribers to this group, $120 per year should be easy. Regarding ways to delete or lower the storage burden, I would hate to see the attachment feature go. It's one of the great features of Groups.io. With Yahoo, when a poster referred to a photo, it was a PITA to go to the Yahoo site to look at it. Having it right in the post itself is the most natural way. It's how we usually do our emails for other purposes. Regarding the files section, with some exceptions I have not found it to be particularly useful when it was at Yahoo, mostly because there was no way to search it with keywords, and no organization to the folders and files themselves. Generally, folders were/are named for the contributor, i.e., by call sign, rather than by content and with no way of knowing what's in them except by opening them up and rooting around. Often folders and files would be created as addenda to a specific post or thread, but outside of that original context have little meaning or value. I have not yet looked to see if files and folders can be searched by keyword in Groups.io. I hope so, as it would make a money contribution to support it a no-brainer. It might also be worthwhile to consider combining "photos" and "files" into one section. A photo is just a file, a document like any other form. I'm not sure there's a reason to distinguish between JPG documents and PDF, DOC, XLS, or any other type. 73, Todd K7TFC |
Re: Getting stuck
Hi John. Thanks for the reply.? That may be a path I choose to take but I'm not quite ready to give up on this one yet. I've been hacking away at this particular assembly for a while now and it's all soldered together. I'd rather give this another go before breaking it all back down. Again, thank you for your advice. I haven't ruled it out, I just want to see if anyone has any tips to show me where I'm going wrong in this particular scheme. There must be a fairly large number of people who've gotten the rig running as I've described, anybody got any hints? 73 de KB1VNA Eric |
Re: Shielding plastic cases
What's wrong with holiday tins? You probably already have some. You can get them for .50 cents at thrift stores, and they have a selection of shapes and sizes. Sometimes you can find metal lunch boxes that have never been used. You can rub the paint with very fine steel wool until the shine comes off. Then spray it with primer, and or paint. Then stick on some adhesive rubber feet to finish it off.? It is best to let the paint harden for a few days. This part is something you could do while you are waiting for delivery.? And preppers can get some to put their radios in to protect them from the big EMP. Sometimes you gotta laugh.? |