Re: Bitx40v3: Analog Alley questions
On 30/04/17 18:48, Thomas Noel wrote: No problem. It seems like it was 20,000 posts ago. ;>) just about was ;)
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Re: Bitx40v3: Analog Alley questions
Hi Raj, It actually seemed pretty stable to me but I did not park it on one frequency for a long time, nor did I have frequency counter on it, and it had warmed up for a while, and I did not try transmitting. Ashhar had said??"the six bidirectional amplifiers (Q1, to Q6) have increased current for better signal handling" so I wonder if there was a downside to switching out the 100 ohm (101) R's for 220 ohm (221) ones. "Better signal handling" sounds good though I am not sure how it is meant or how much of a practical change it makes. Otherwise, on the advantage side, besides generating less heat, the rig would need less current, an advantage if mobile and running on batteries. The noise varies with the volume and goes away if the control is turned down enough. It is not motorboating. But it does seem to be a pretty loud noise floor for not having any signal at all. Perhaps it is picking up noise from the power supply or the environment and might be quieter running off batteries and inside a metal case. Note that I have not removed the 1uF cap (C113) between pins 1 and?8 of the LM386 and wonder if reduced background noise is part of the "improved audio" that comes with removing it.? Thanks, jer aa1or
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Re: Bitx40v3: Analog Alley questions
No problem. It seems like it was 20,000 posts ago. ?;>)
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On 30/04/17 17:48, Thomas Noel wrote: Steve et al,
This mod was recommended by A. Farhan himself as a means of reducing
the heat from the BiDi amplifiers.
Well how about that. ?:) ??Stuff I never knew. As you were, and apologies. Steve
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Re: Bitx40v3: Analog Alley questions
On 30/04/17 17:48, Thomas Noel wrote: Steve et al,
This mod was recommended by A. Farhan himself as a means of reducing
the heat from the BiDi amplifiers. Well how about that. :) Stuff I never knew. As you were, and apologies. Steve
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Re: Bitx40v3: Analog Alley questions
Jer,
Check if the board is already stable before you change to NP0 or change to 220 Ohms.
One of my early boards was very unstable and Np0's cured it.
A later board is very stable does not need the NP0's
Turn the volume down and does the noise go away or it is "motor boating" which happens if the audio volume wiring is wrong!
Raj
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At 29-04-2017, you wrote: So I bought one of the original $47 Bitx40's but I have been working away from home and fisrt wire do it up yesterday. I did order an ioLabs VFO for it and then got a raduino for it but have touch?? neither. My first thought is to put in NPO caps and see if I can make the analog VFO stable enough to use as is. First mod is a polarity protection fuse and diode (been there).
So, I have a couple of questions. I hooked it up and powered it on it ha dummy load and was surprised by the amount of noise a single I turned up the volume with no antenna. (#1)Where is this noise coming from?
Is it the LM386? Or some place else? Can the LM386 be replace with a TDA2822 And would that make a significant difference?
Second question: on earth of the first mods was to replace some of the resitors to reduce current and heat. Mine came with the extra resistors. So, (#2)is there any down side to doing this replacement?
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Re: raduino_v1.09 with RIT (SPLIT) functionality
Yes it could be used as a vox function ?if analog from the mic circuit is sampled?
Sent from my iPhone
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On 30 Apr 2017, at 03:13, Yeonghwan Jun < ds5siz@...> wrote: I respect you that you make new version always and release to us. so I wish to add my idea. I have idea about PTT signal. I had though that raduino recevice ptt signal from ptt switch directly. and output ptt signal from raduino to transceiver board. I think It's more simple to use and applicate for other things, isn't it?
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Re: Bitx40v3: Analog Alley questions
Steve et al,
This mod was recommended by A. Farhan himself as a means of reducing the heat from the BiDi amplifiers. This was way back in December?? as an attempt to decrease the frequency instability of the non-raduino first copies of the BitX40 with analog VFO. HFSigs was kind enough to even provide the resistors for those who wished to do the mod. I still have mine as I proceeded to buy the Radiono to go with my kit.
Still a valid way to deal with the analog VFO, but this gentleman has a synthesized VFO so unless he is looking for a small gain in field operation battery life, not much point in swapping the resistors.
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On 30/04/17 16:47, ohwenzelph via Groups.Io wrote: Steve wrote "the main downside is that your project will stop
working", well that is a risk but I am pretty sure I could do the
exchange without breaking it.
So, is there any OTHER downside to putting in the higher ohm resistors????
What I mean to say here is, "putting higher ohm resistors in it" isn't the valid electronics you announce it to be, but I was trying to be polite. To be direct, if you pull your kit apart and "put higher ohm resistors in it", it will stop working or else you will severely cripple it, plain and simple. Steve
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Re: Bitx40v3: Analog Alley questions
On 30/04/17 16:47, ohwenzelph via Groups.Io wrote: Steve wrote "the main downside is that your project will stop
working", well that is a risk but I am pretty sure I could do the
exchange without breaking it.
So, is there any OTHER downside to putting in the higher ohm resistors????
What I mean to say here is, "putting higher ohm resistors in it" isn't the valid electronics you announce it to be, but I was trying to be polite. To be direct, if you pull your kit apart and "put higher ohm resistors in it", it will stop working or else you will severely cripple it, plain and simple. Steve
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Go to ADVANCED options....
NOW you only get a "heads up" for a new topic... If you're interested, follow it, if not, delete it & you'll NEVER be bothered by that thread again. Simple.
--
73 de Noel, ZL1NC
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Re: Bitx40v3: Analog Alley questions
NOT sure of the exact tuning range yet. ( I hate automatic spell "correction")
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Re: Bitx40v3: Analog Alley questions
Already built an antenna for it, just not in the air yet, and won't be till I get back home again. And did hook it up to small loop, it receives well, CW and SSB. ?Or sure of the exact range yet. The supplied pot would be very touchy tuning but I have some ten-turn pots.? Steve wrote "the main downside is that your project will stop working", well that is a risk but I am pretty sure I could do the exchange without breaking it. So, is there any OTHER downside to putting in the higher ohm resistors???? Jer aa1of
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Re: Downloading hex code from raduino
You're right. I was trying to do it the hard way. Turned out v1.09 compiled and loaded just fine so I didn't need he safety net anyway.
Thanks
Pat aa4pg
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On Apr 29, 2017, at 9:21 PM, Jack Purdum via Groups.Io < econjack@...> wrote:
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Probably not necessary as there likely many of us who have the original version Farhan wrote all the way through version 1.09.
Jack, W8TEE
I have successfully compiled Allard's new software. But before uploading to the raduino, I want to save the current version such that it can be reloaded if I have a problem ?I was able to download the current
version hex code using ..avrdude -c Arduino -b 57600 -P <com port> -p atmega328p -C<config file> -Uflash:r:c:<stored file>:i ?Where <comport> is the com port such as com4, <config file> is the config file such as "Program files\arduino\hardware\tools\avr\etc\avrdude.conf",
<stored file> is the file name on the PC for the hex file. ?Unlike downloading from an Arduino uno, in this case I had to force the baud rate to 57600 with the -b 57600 command.
Now, I have downloaded a hex dump from an arduino and then uploaded it back to the arduino and that worked. ?I did that as practice to get the commands right. ?So, now, if I need to revert to the original code
in the raduino, I claim I should be able to simply change the -Uflash:r in the above command to -Uflash:w, and reload the original hex code. ?Has anyone done this??
Thanks,
Pat AA4PG
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Re: Downloading hex code from raduino
Probably not necessary as there likely many of us who have the original version Farhan wrote all the way through version 1.09.
Jack, W8TEE
From: pat griffin <patgriffin@...>
To: [email protected]
Sent: Saturday, April 29, 2017 4:44 PM
Subject: [BITX20] Downloading hex code from raduino
I have successfully compiled Allard's new software. But before uploading to the raduino, I want to save the current version such that it can be reloaded if I have a problem ?I was able to download the current version hex code using ..avrdude -c Arduino -b 57600 -P <com port> -p atmega328p -C<config file> -Uflash:r:c:<stored file>:i ?Where <comport> is the com port such as com4, <config file> is the config file such as "Program files\arduino\hardware\tools\avr\etc\avrdude.conf", <stored file> is the file name on the PC for the hex file. ?Unlike downloading from an Arduino uno, in this case I had to force the baud rate to 57600 with the -b 57600 command. Now, I have downloaded a hex dump from an arduino and then uploaded it back to the arduino and that worked. ?I did that as practice to get the commands right. ?So, now, if I need to revert to the original code in the raduino, I claim I should be able to simply change the -Uflash:r in the above command to -Uflash:w, and reload the original hex code. ?Has anyone done this?? Thanks, Pat AA4PG
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Re: raduino_v1.09 with RIT (SPLIT) functionality
I respect you that you make new version always and release to us. so I wish to add my idea. I have idea about PTT signal. I had though that raduino recevice ptt signal from ptt switch directly. and output ptt signal from raduino to transceiver board. I think It's more simple to use and applicate for other things, isn't it?
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Re: Downloading hex code from raduino
Thanks,
I just downloaded, compiled and installed v1.09 and it works great. ?Good job.
Yes, I was taking the long way around the barn with the hex code business.?
Pat AA4PG
Pat Griffin
http://www.cahabatechnology.com
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The current release raduino_v1.09, as well as all previous releases can be
downloaded from
73, Allard PE1NWL
On Sun, April 30, 2017 01:49, Steve Wright wrote:
> On 30/04/17 10:54, pat griffin wrote:
>> Good idea. The bitx40 has the code it came with. I didn't know the
>> original source could be downloaded. Where would I find that source
>> code?
>
> I haven't googled it recently, and I have my head down in another
> project right now.? Perhaps the wiki has links to the main firmware
> repository, and some later versions?? If it doesn't, maybe when you find
> it you might add it to the wiki?? ;)
>
>
>
> Steve
>
>
>
>
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Re: Downloading hex code from raduino
The current release raduino_v1.09, as well as all previous releases can be
downloaded from
73, Allard PE1NWL
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On Sun, April 30, 2017 01:49, Steve Wright wrote: On 30/04/17 10:54, pat griffin wrote:
Good idea. The bitx40 has the code it came with. I didn't know the
original source could be downloaded. Where would I find that source
code? I haven't googled it recently, and I have my head down in another
project right now. Perhaps the wiki has links to the main firmware
repository, and some later versions? If it doesn't, maybe when you find
it you might add it to the wiki? ;)
Steve
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raduino_v1.09 with RIT (SPLIT) functionality
I've just released raduino_v1.09, download it from New in this release: - added RIT (SPLIT) functionality. This requires a PTT sense line connected to pin A0 (black wire)
(see for wiring instructions) - simplified tuning range setting in SETTINGS menu
- less frequent EEPROM writes so that EEPROM will last longer
Before updating please carefully read the updated user instructions at
73, Allard PE1NWL
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Re: Downloading hex code from raduino
On 30/04/17 12:01, pat griffin wrote: [....] Too many long hours spent in the dark ages picking through disassembled code :)
Very satisfying though.. ;) Have fun! S
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Re: Downloading hex code from raduino
Will do. If I can't scare it up I may go ahead and install the latest version. I'm pretty sure the hex dump will work if I need it. But as you say it's much easier to work from source. Too many long hours spent in the dark ages picking through disassembled code :)
Thank
Pat aa4pg
Sent from my iPhone
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On Apr 29, 2017, at 6:49 PM, Steve Wright <SteveWrightNZ@...> wrote:
On 30/04/17 10:54, pat griffin wrote:
Good idea. The bitx40 has the code it came with. I didn't know the original source could be downloaded. Where would I find that source code? I haven't googled it recently, and I have my head down in another
project right now. Perhaps the wiki has links to the main firmware
repository, and some later versions? If it doesn't, maybe when you find
it you might add it to the wiki? ;)
Steve
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Re: Downloading hex code from raduino
On 30/04/17 10:54, pat griffin wrote: Good idea. The bitx40 has the code it came with. I didn't know the original source could be downloaded. Where would I find that source code? I haven't googled it recently, and I have my head down in another project right now. Perhaps the wiki has links to the main firmware repository, and some later versions? If it doesn't, maybe when you find it you might add it to the wiki? ;) Steve
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Raj vu2zap
Allard PE1NWL