Re: Simple audio muting circuit
Yes in v1.10 the CW carrier will be created by unbalancing the mixer. Of course it can be used just for tuning as well. 73 Allard PE1NWL On Tue, May 9, 2017 15:18, pat griffin wrote: Allard,
You mentioned that v1.10 includes CW. I am on v1.09 which works just fine.
I have added the CW scheme by KE7ER from post 22841 where the carrier is
unbalanced with a voltage injection through a diode such that the circuit can be left in place. Actually, I don't use it for CW but only for tune up. Will v1.10 support this?
Thanks for your hard work,
73 Pat AA4PG
Pat Griffin
________________________________
From: [email protected] <[email protected]> on behalf of Allard PE1NWL
<pe1nwl@...> Sent: Monday, May 8, 2017 10:28:39 AM
To: [email protected]
Subject: Re: [BITX20] Simple audio muting circuit
Hi Jack,
The audio muting schematic suggests that the sidetone is amplified by the LM386, however I think this won't work as the LM386 is off during TX.
But in your solution you connect the speaker directly to the Arduino
output pin, right? So that the sidetone doesn't go via the LM386 at all? Is the standard tone() command not loud enough?
I have almost finalized raduino_v1.10 which includes CW. The code is
working OK, but I'm still looking for a simple yet reliable way to make the sidetone audible during TX.
Any ideas or suggestions?
73 Allard PE1NWL
On Mon, May 8, 2017 16:50, Jack Purdum via Groups.Io wrote:
In the code I'm working on, which has a CW mode and contest keyer for the
BITX40, I use the NewTone library and send a tone from an analog pin. Even
with a dropping resistor, it's loud enough to be usable. However, I don't
know how much more memory you have left. I'm using the Mega2560 Pro
Mini so it's not a problem. Just a thought... Jack, W8TEE
From: Allard PE1NWL <pe1nwl@...>
To: [email protected]
Sent: Monday, May 8, 2017 10:42 AM
Subject: Re: [BITX20] Simple audio muting circuit
Looking at the main board schematic the LM386 is only on during RX. So how
can the sidetone be heard at all during TX?I guess an additional mod is
required to keep the LM386 on all the time?73, Allard PE1NWL
|
On a different thread (OT -- Two Ham eBooks I Need Today) someone commented about diagnostic techniques, especially those that don't require an O scope.
This past weekend I built a $27 DSO?
The kit was inexpensive, easy to build, good instructions with plenty of pictures, etc, I recommend it. I have no idea how to use it, nor what to check with it on the BitX, but am learning.?
Anyone who wants to chime in with a quick primur on using an O scope to help troubleshoot the BitX, it would be greatly appreciated.
73, Richard
-- W2KAP In any given circuit, the most expensive part will always sacrifice itself to protect the fuse.
|
Re: Simple audio muting circuit
Allard,
You mentioned that v1.10 includes CW. I am on v1.09 which works just fine. ?I have added the CW scheme by KE7ER from post 22841 where the carrier is unbalanced with a voltage injection through a diode such that the circuit can be left in place. ?Actually,
I don't use it for CW but only for tune up. ?Will v1.10 support this?
Thanks for your hard work,
73 Pat AA4PG
Pat Griffin
http://www.cahabatechnology.com/aa4pg.html
toggle quoted message
Show quoted text
Hi Jack,
The audio muting schematic suggests that the sidetone is amplified by the
LM386, however I think this won't work as the LM386 is off during TX.
But in your solution you connect the speaker directly to the Arduino
output pin, right? So that the sidetone doesn't go via the LM386 at all?
Is the standard tone() command not loud enough?
I have almost finalized raduino_v1.10 which includes CW. The code is
working OK, but I'm still looking for a simple yet reliable way to make
the sidetone audible during TX.
Any ideas or suggestions?
73 Allard PE1NWL
On Mon, May 8, 2017 16:50, Jack Purdum via Groups.Io wrote:
> In the code I'm working on, which has a CW mode and contest keyer for the
> BITX40, I use the NewTone library and send a tone from an analog pin. Even
> with a dropping resistor, it's loud enough to be usable. However, I don't
> know how much more memory you have left. I'm using the Mega2560 Pro Mini
> so it's not a problem. Just a thought...
> Jack, W8TEE
>
>?????? From: Allard PE1NWL <pe1nwl@...>
>? To: [email protected]
>? Sent: Monday, May 8, 2017 10:42 AM
>? Subject: Re: [BITX20] Simple audio muting circuit
>
> Looking at the main board schematic the LM386 is only on during RX. So how
> can the sidetone be heard at all during TX?I guess an additional mod is
> required to keep the LM386 on all the time?73, Allard PE1NWL
>
>
>
>
|
Re: Bitx40 with rotary encoder + CW
Hi,
This is not need. Source code for arduino is in internet.
73!
On Thursday, May 4, 2017 5:07 AM, pat griffin <patgriffin@...> wrote:
I had the same question about saving and restoring the original program. ?It can be done using avrdude but it turns out it isn't necessary since the source of just about all releases is available. ?Also, the current v1.09 compiles and installs without a
hitch and you will not want to go back. ?Search the messages for "hex dump" to see the discussion about this.
73,
Pat AA4PG
Pat Griffin
http://www.cahabatechnology.com/aa4pg.html
Hello,
Why does anyone have some modification to implement rotary encoder
with s-meter and CW on bitx40?
My kit uses the raduino. I would also like to have the backup of the
original program of the kit to be saved if the modifications do not
work out
I need help because I have no experience with raduino and I'm starting
now in amateur radio
Tks
PU2URP - Pimentel
73
|
Re: Raduino_v1.04 allowing 10-turn tuning pot for complete band coverage
Thanks, I think I just might!
Brian, K2BRZ
|
Re: OT--Two Ham eBooks I Need Today
I would like to learn diagnostic techniques for the BITX40, in particular for those who don't have an oscope.
|
Re: Raduino_v1.04 allowing 10-turn tuning pot for complete band coverage
Hi Brian,
yes, that would give a tuning range of 7000-7300 kHz.
If you upgrade to v1.09 then you can set the tuning range with the
function button in the SETTINGS menu - no manual code etiting needed
anymore.
73, Allard PE1NWL
toggle quoted message
Show quoted text
On Tue, May 9, 2017 14:41, Brian D. K2BRZ wrote: Thanks, Allard. I'm using your 1.07 sketch and was wondering how to apply
these to the Tuning_Range and baseTune, since they are different between
the two sketches? Would the following code change be appropriate in
version 1.07 (I am in America):
int TUNING_RANGE (300); // tuning range (in kHz) of the tuning pot
unsigned long baseTune = 7000000L; // frequency (Hz) when tuning pot is at
minimum position
Thanks for all of your work!
Brian, K2BRZ
|
OT--Two Ham eBooks I Need Today
>"The Bitx40--Theory and Hacks" >"Everything is graduate school--DMR, Timeslots and Brandmeister" I know the information is scattered already all over Facebook and the web but I'd like to see it all presented logically, searchable with some narrative, links, embedded videos, etc. Vetted by someone: a major blogger, Facebook group,?SolderSmoke guys,?etc. I'd pay for them through some self-publishing eBook agent like Amazon or iBooks. Meanwhile, I'll be out cutting the grass. bob wm6h
|
Re: Raduino_v1.04 allowing 10-turn tuning pot for complete band coverage
Thanks, Allard. I'm using your 1.07 sketch and was wondering how to apply these to the Tuning_Range and baseTune, since they are different between the two sketches? Would the following code change be appropriate in version 1.07 (I am in America): int TUNING_RANGE (300); // tuning range (in kHz) of the tuning pot unsigned long baseTune = 7000000L; // frequency (Hz) when tuning pot is at minimum position Thanks for all of your work! Brian, K2BRZ
|
Re: New BITX40 owner, and a few issues
The rotary encoder should be working just fine with the Raduino software. I didn't try it with v1.09 though, since I modified the code myself to use the encoder. But I can tell you I first used a standard clicky low resolution encoder and when I received my optical one in the mail I just wired it up and it worked very well out of the box. I just added a couple lines in the code to lower the resolution a bit for my taste, by skipping steps. My Raduino sketch is here, I just uploaded it:? And the STL files are all here, under BITX40:?
I tried to change the drive level for both of the SI5351 clocks, I'm on 2mA right now but anything higher just increases the birdies strength. No luck for me here it seems.
Yesterday on the BITX40 I tombstoned capacitors C23, C53 and bridged them, and I did the same with C31, C61, completely disconnecting the internal crystal filter. I then removed the SSB filter from my Kenwood R-5000 and put it on the BITX. After a quick calibration of the BFO frequency and filter width in the code, it works great. And what a wonderful and pleasant audio! Now the IF is at 8.830MHz, and the birdie moved to 7.0627MHz. Fortunately I can still listen to the local morning ragchew on 7.060MHz but I can still hear a very high pitch birdie in the background though.
|
Re: New BITX40 owner, and a few issues
Here is a link to the sketch
--
Mike VK3XL
|
Re: New BITX40 owner, and a few issues
Hi Etienne, I believe the birdie at 7.1975 area is due to the VFO injection level. If you are up to modifying the raduino by uploading a new sketch to it., I believe the birdie can be reduced by adjusting the output level. there is a very useful sketch (V1.0.9) that allows you to do this as well as many other useful things.
--
Mike VK3XL
|
Re: How do I calibrate DDS VFO?
In addition to what Allard said, you have the procedure a little backwards. When you know a signal is on say 7.060, but the display reads 7.0648, you first need to adjust the vfo so the display reads 7.060, then short the red wire, then tune up and down until you hear the signal that is actually on 7.060. Once you have it sounding right to your ear unshort the red wire and the offset should be saved. Now your display should read correctly.
--
Mike VK3XL
|
Not sure if this is meaningful but I noticed the supplied Tune pot had warble effect when ever I flexed the mounting board or touched the tune pot shaft. ?? Use a 10 turn 10k pot now and I don't hear the warble much now.? Maybe the quality of the supplied tune pot. ?
I swapped out the supplied volume pot for a 10k audio taper pot. ?seems audio is better/smoother controlled.? Removed c113 (1uf) from pins 1 and 8 of the LM386. ?soldered in a 10uf. tant cap in series with a 2-5k trimmer.? Cap neg. side to pin 1 of lm386 and the trim pot to pin 8 of the LM386.? I find a very loud QSO and turn the vol pot up high into distortion and turn the trim pot until the reasonable distortion backs down.? Then turn the vol pot back into a nicer sound.? I used double sided foam tape to hold thinks in place.
I call it a poor hams manual gain control.? Just cuts down on the surprise volume jumps. Better on the ears til a AGC is developed. Hope that helps
73 WA9DOH.
PS if you can zoom into the middle see red trim pot and cap taped to the LM386.
On Mon, May 8, 2017 at 9:25 PM, Jonathan Peakall <jpeakall@...> wrote: Hi All,
A pal of mine got a BTX40 theother day. He got it up and running and we had a couple of QSO's. He has a definite warble to his audio. It is legible but not acceptable. He has tries a couple of mic elements. Any ideas what it could be?
Jonathan - KK6RPX
|
what version are you running? v1.09 removes frequency flutter on transmit and the resulting FMing which may be the cause of "audio" problems. v 1.09 solved it for me. Willy W1LY
On Mon, May 8, 2017 at 10:33 PM, Arv Evans <arvid.evans@...> wrote: Maybe RF getting into the microphone cable.? Bypassing the mic
with a 0.001 on the mic end might help if this is the problem.
_._
|
Re: BITX QSO Night, Sunday, May 14, 9pm Local Time, 7.179 MHz
This was already discussed. Just do a voltage divider (max in on an Arduino pin is 5V) and route it to an analog pin. Then use the map() function to scale it to the proper value.
From: Arv Evans <arvid.evans@...>
To: [email protected]
Sent: Monday, May 8, 2017 10:33 PM
Subject: Re: [BITX20] BITX QSO Night, Sunday, May 14, 9pm Local Time, 7.179 MHz
Larry, and others...
Interesting thought for battery operated BITX devices...the Arduino
that is used to control the DDS could also monitor and display
supply voltage.? Code for using the ADC input is trivial so possibly
it could be incorporated into the DDS management sketch.? Could
be quite useful for the battery operated crowd.
Arv? K7HKL
_._
|
Maybe RF getting into the microphone cable.? Bypassing the mic
with a 0.001 on the mic end might help if this is the problem.
_._
On Mon, May 8, 2017 at 8:25 PM, Jonathan Peakall <jpeakall@...> wrote: Hi All,
A pal of mine got a BTX40 theother day. He got it up and running and we had a couple of QSO's. He has a definite warble to his audio. It is legible but not acceptable. He has tries a couple of mic elements. Any ideas what it could be?
Jonathan - KK6RPX
|
Re: BITX QSO Night, Sunday, May 14, 9pm Local Time, 7.179 MHz
Larry, and others...
Interesting thought for battery operated BITX devices...the Arduino
that is used to control the DDS could also monitor and display
supply voltage.? Code for using the ADC input is trivial so possibly
it could be incorporated into the DDS management sketch.? Could
be quite useful for the battery operated crowd.
Arv? K7HKL
_._
On Mon, May 8, 2017 at 6:42 PM, Larry Smith <815cpu@...> wrote: Operating Note: I have noticed the final gets fairly warm as i keep QSO/ talking.? I attached a larger heat sink and run a small 2"x2" 12v fan from a separate battery I have.? I have a 8v battery so I use it.? fan runs slow and quiet. Dose the job.?
I run the BITX station from a 12v 18AH jell battery I had here so I keep the fan power separate. ? When my main battery runs down to say 11.5+ volts then of course my 5-6 watts dwindles down to 3 watts. Next week QSO night I'll attach my (free w/coupon) Harbor Freight DVM and watch the volts.
Just a FYI from WA9DOH
73 Larry
|
I would check power. ?12 to 14 volts and at least 3 amps.? Maybe a bigger filter cap, to kill the ripple in the power supply??
73s,
Marco - KG5PRT
On Mon, May 8, 2017 at 9:25 PM, Jonathan Peakall <jpeakall@...> wrote: Hi All,
A pal of mine got a BTX40 theother day. He got it up and running and we had a couple of QSO's. He has a definite warble to his audio. It is legible but not acceptable. He has tries a couple of mic elements. Any ideas what it could be?
Jonathan - KK6RPX
|
Hi All,
A pal of mine got a BTX40 theother day. He got it up and running and we had a couple of QSO's. He has a definite warble to his audio. It is legible but not acceptable. He has tries a couple of mic elements. Any ideas what it could be?
Jonathan - KK6RPX
|
Allard PE1NWL
Willy