Hmm, could this be a switch bounce situation? Bounce - when the switch has a mechanical oscillation against the contact, like two pieces of metal banging together and the pushing away, then coming back, and pushing away until the bang energy diminishes and the metal stays in contact. In the old days, in the dark times when 300 baud ruled the land, when we put a switch on a digital i/o line we either had to write code that would sense if the switch was triggered, then set a look again flag but not take action, look at the switch again in say 100 or 200ms, and if it was still triggered take action. Alternatively we sometimes put in a single shot multi-vibrator for momentary or a flip-flop if not, which held the switch state once triggered. Then if the switch had bounce after first contact it would have no effect on the microprocessor as the first trigger was locked.?

Anyway, just some odd old neurons firing off.

73?

On Sun, Oct 22, 2017 at 10:53 pm, Francesca Wine wrote:

I had not heard anyone? in the past monrh on 7.277. I think the band is not as good at night.?

It's certainly been pretty poor at night?here on the East coast. The only saving factor here is that we have more stations around as opposed to Nevada.?Saturday afternoon a friend of mine in the Phoenix area was listening to a?WebSDR in NE PA and emailed me to let me know that he was hearing someone on 7277 calling CQ for the NY QSO Party contest. I got on around 4:30PM and worked?10 stations all across NY from Buffalo to Long Island. Although most of those stations were running more than 5W I assume, I got 58 and 59 signal reports from all of them with my 5W and Mag Loop.

Would there be any interest in having 2 meeting times on Sundays;?the usual 7PM time plus maybe 4PM (remembering we change the clocks in a couple of weeks)?
?
--
John - WA2FZW

Jacks on vacation...might be a while before he responds.

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?think you're off a decimal point there.... 2 mA into 50 ohms is 1/5 of a milliwatt so it wold not be 3dBm....

this page indicates that setting the drive at 2ma equates to 3dbm into a 50ohms load.

I had not heard anyone? in the past monrh on 7.277. I think the band is not as good at night.? I talk? on 7186 at 8am pst everyday on the? Early bird net on my bitx 40.
Give it a try on 7186 with? Steve.
Francesca W7LTG NV

Sunday, 22 October 2017, 06:07PM -07:00 from RCC WB5YYM curtis03@...:

--
I have ?bitx40 ?and completely wired up. get nice hiss when the volume up. display lights up only showing Raduino V1.01. ?frequency never shown, anyone have that problem? ?i think the software is not in the chip.
Francesca W7LTG ? NV?

Hello Adrian
I have just bought one of Jacks boards and busy building it up to connect to my bitx40 v3. I'm a little confused in the documentation as to how and what to connect to where when it comes to both boards. Can you give me a little rundown on how you connected your two together please.
73 de ZL1RAH - Rodger

I’ve been successful at reducing the H/W induced PTT carrier burst to ~ 6ms, and this is unchanged by Allard’s carrier blanking code... (i.e. 75 ms of no carrier). What did change however; is that it now only occurs intermittently, perhaps 25% of the time, with direct keying of the PTT input. It does nothing in CW mode however, where it continues to burst for 6 ms, then blank an additional 9 ms before the start of the first CW element. This corrupts the first 20% of the first element (if a dit) at 20 WPM, and possibly not terribly noticeable in modest QRM/QRN. It is a bit annoying to know it is there and allowing it to go unchecked though.?It also inhibits it’s CW utility much above 20 WPM.

Going back to Dave’s first suggestion on this; I moved the blanking code into the checkCW function. It now keys cleanly and uncorrupted with just a 25 ms delay. I still haven’t tried the BITX on SSB, and have no urgent need to do so, but for my use, I am now a happy camper. :-) ?OTOH... Had I not sped up the TX/RX switching speed, the burst likely would have bridged through the gap (between 6 and 15 ms post keydown) which I may have created by shortening the burst duration while not successfully eliminating it altogether.

Putting all of this together though, brings me back to being in favor of Dave’s suggestion of or’ing the MIC PTT with PTT_SENSE, since this would replicate keying the transmitter as if in CW mode. It would appear reasonable to assume that if blanking of a short 6 ms burst in fast H/W for CW, unmodified hardware could be tamed by an arbitrary length blanking period in SSB mode, and 75 ms may work fine for those who have no need for CW very much above 16WPM.?

The software is changing faster than I can learn C/C+/C++ and Arduino programming, so I haven’t figured out how to hack the code to do this successfully yet. I’m also not absolutely certain Dave’s approach will work simply by wire or’ing the H/W. PTT_SENSE needs to be detected early in the SSB PTT detection routine so that the clock can be shut down ahead of activating K1, and restart delayed until K2 is activated and all power supply changeover transients have settled. e.g. early in the checkCW function, the software could differentiate between keydown and Mic PTT using something like:

if(PTT-SENSE && !TX/RX) { ? ?// Mic PTT activated and key or keyer input not detected.... SSB transmit mode requested.
si5351bx_setfreq(2, 0); ? ? ? ? ?// turn off CLK2

I have tried several of the small switcher regulators, but in most cases I had to add additional filtering to reduce noise. When I have to run a Nano or pro-mini with more than about a 9V, I just feed it through several 1N4002 diodes in series to drop the applied voltage down to the 7-9 volt range. This makes the little regulator on the Nano or Pro-mini much happier.



--
DuWayne? KV4QB

Sounds to me like Ryan was asking whether this discussion somehow applies to the transmit LPF's.
And that Farhan is thinking only about receive.

Jerry

Just checked my email link and I couldn't get it to work. It is @yahoo.com? with no Xes

I talked to Willy for about 30 minutes or so. Signals were weak starting out, but picked up and became solid copy. We also worked KC1FSZ, Bruce in Massachusetts who has a great sounding bitx, and also VA3NOI. I heard several other stations down in the noise.?

Willy if you read this, shoot me an email? r_curtxxxx60@...? ?(eliminate all the xes)?

Band is bad tonight up here in Barrie ON. Not hearing much other than the AM clatter. Where is everyone hanging out? Trying between 7.277 to 7.285. Also trying to work VY0RAC in Nunavut but no copy either.

Bill, that was a terrific story. I studied some physics in college, but the human source of the wisdom often went right past me, as I struggled to understand the concepts. It would have been far more enjoyable if they blended in a little history with the equations. But much better late, than never. I am very grateful for the chance to learn more, not just about physics, but about the great men that were responsible for those discoveries. I've been to India, and it was an amazing experience. This story about Bose, Raman, and Saha makes me even more enthusiastic!

By the way, I also purchased and read your book "Solder Smoke" recently, and liked it so much I gifted it to a colleague at work. A fascinating account of your own personal discoveries, and very well written. I had a hard time putting it down.

Great job!

73s de N5KNG.

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?I put a 10x mic preamp 1-transistor circuit in one of my bitx40's yesterday and finally it uses about the same signalink settings as my "commercial" rigs....and I can also see output without having to YELL into a baofeng $6 electret mic.? ?

I included a switch to insert or short a series 1 uf capacitor, so the preamp can supply 6v to an electret, or be ac coupled for the transformer output of a signalink.

Good steers!
Thanks.