Follow up: Ok, the 5-2-2017 revised schematic in the wiki makes it clear where to put the agc circuit (instead of just audio in & audio out. "splain it to me like I'm 5 please") Built per the schematic(ignoring the photo in the mod blog) and put where it is actually supposed to be, the sound actually gets thru!!!! [I do not understand this electronics stuff... sigh..] There was a buzz but I had alligator clip wires all over the place, so forgiving that.?
Will try the vk3ye one, sounds like there are a large variety of LDRs.. so results may vary?
Did try the anti hiss mod in the "tips and mods" with 'NOTE:?NOT Bitx40 schematic', with 0.01 and 10k from pin 5 to pin 8 of the lm386, but it did not work for me and added a loud 10k hz tone.
Sent from my iPad
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Re: Tuning potentiometer too long to be fitted
So will a pneumatic cut-off tool! A hacksaw will fix that problem.
Vince. -- Michigan VHF Corp.
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Re: Tuning potentiometer too long to be fitted
Cesar,
The potentiometer shaft on my Raduino was aluminum and was easy to cut with a hacksaw and shape with a hand file. Of course, be careful to keep metal fragments away from your BITX40.
Regards,
Craig
w9ctw
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Re: Struggling with tuning clicks and birdie sounds
It seems there is a huge variability between various BITX40 radios, and
there are various points where improvements may help.
In my particular case, I achieved the greatest tuning click reduction just
by using shielded wires to and from the volume potentiometer.
73 Allard PE1NWL
wOn Wed, June 7, 2017 12:07, DJ4MU wrote:
toggle quoted message
Show quoted text
I already have the 100nF across wiper -ground on both sides of the Tuning
Pot connection,
as well as the 56ohm and bypass capacitor 1000uF and 100nF in the feed
line of the Raduino 5v regulator as suggested in various posts.
so you suggest those noises still come from power supply line of Raduino?
can that be measured with oscilloscope??
73
Philipp DJ4MU
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Re: uBITX - A reboot of the old BITX
I recently purchased the LCR-T5 test meter (eBay #142169115833) and am very pleased with its results. I build a lot of projects and, when you're two years younger than dirt, reading those cap numbers is almost impossible. Chokes and inductors are also easily read, as well as diodes, transistors, and other devices. It's saved me some grief as recently as last week when an axial inductor was bad. Measuring before you put it in the circuit takes a few extra seconds, but enhances the odds I'll still have hair when the project is done.
Jack, W8TEE
From: Mvs Sarma <mvssarma@...>
To: [email protected]
Sent: Wednesday, June 7, 2017 5:02 AM
Subject: Re: [BITX20] uBITX - A reboot of the old BITX
It is OK Lawrence Galea for people on the habit of electronics assembly etc.
For others, things might appear rather difficult.
?
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Re: Tuning potentiometer too long to be fitted
A hacksaw will fix that problem.
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Re: Struggling with tuning clicks and birdie sounds
I already have the 100nF across wiper -ground on both sides of the Tuning Pot connection,
as well as the 56ohm and bypass capacitor 1000uF and 100nF in the feed line of the Raduino 5v regulator as suggested in various posts.
so you suggest those noises still come from power supply line of Raduino?
can that be measured with oscilloscope??
73
Philipp DJ4MU
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Re: uBITX - A reboot of the old BITX
Hello Sarma, I understand that people new to electronics may find it difficult to solder smd components and wind coils, but they have to try to do it. Once they try they will find it easier than they ever thought. 1206 size should present no problem and should be similar to soldering normal components with leads. As an old timer (licensed March 1967, 50 years ago) I was used to valves and big components, but when I tried smd soldering I did not find any difficulty at all and I have also soldered 0603 components. What you need is a soldering iron with a pencil bit and a good magnifying glass apart from a steady hand. Placing components on the board is also not difficult. You can use a toothpick, dip the end of the toothpick in a glue stick (the glue stick used to stick paper together) and once you touch the component it will stick to the toothpick, place the component on the pcb and touch one end of the component and board with the soldering iron. Usually there is enough solder on the tinned board to solder the component initially, but if not just put a tiny amount of solder before you put the component on the board. Solder one end making sure that the component is in its proper place and then solder the other end. You can also use pincers to put the component on the board or even slide it on the board. One thing you should do is use some sort of container to hold the pcb because you can be certain that some component will fly off into outer space and will never be found. I agree that you should have some sort of LC meter to check the components and also other instruments if you can afford it, but?winding the specified number of turns on the specified form should be close enough, although fine tuning can always be made for peak performance. To those who are afraid to try just do it and see how easier it is than you ever thought. As the saying goes, an ounce of practice is worth a ton of theory. Go on and have fun. Regards? Lawrence
On Wed, Jun 7, 2017 at 11:02 AM, Mvs Sarma <mvssarma@...> wrote: It is OK Lawrence Galea for people on the habit of electronics assembly etc.
For others, things might appear rather difficult.
?
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Tuning potentiometer too long to be fitted
Have you cut the potentiometer innorder to fit a knob? It is too long and the knob looks odd so far away from the case?
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Re: Struggling with tuning clicks and birdie sounds
Perhaps Philipp could use 100uH in the supply line to the raduino board and place iit close to raduino and add a 470uF and 100nF caps there after inductor towards raduino.
?It help to filter the noise pulses, IMHO regards ?sarma ?vu3zmv
On Wed, Jun 7, 2017 at 1:31 PM, Allard PE1NWL <pe1nwl@...> wrote: Philipp,
Thanks for reporting this.
v1.14 was released only last night.
I'm wondering, did you have the same problem with previous version v1.13
or before? You can still download earlier releases from
In other words: is this problem specific to the newly released sketch, or
is it a general problem with your radio?
73 Allard PE1NWL
On Wed, June 7, 2017 09:38, DJ4MU wrote:
> Trying to set up my BitX with Allard's version 1.14
> and Jason's etherkit Si5351 version 2.0.1 Library
> I'm struggling with a clicking background noise, tuning clicks and
> especially distortions while trying to set the offsets.
>
> see attached [video]()? for further
> explanation.?
>
> Beginner here so not sure which of it is still within normal limits .
> i'm a little lost on what to search for as this ,while by far not my first
> electronics ,? is my first Radio,
> Any suggestions on what to measure or try to diagnose and fix this problem
> would be helpful.
>
> vy 73
> Philipp DJ4MU
>
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Re: uBITX - A reboot of the old BITX
It is OK Lawrence Galea for people on the habit of electronics assembly etc.
For others, things might appear rather difficult.
?
On Wed, Jun 7, 2017 at 12:58 PM, Lawrence Galea <9h1avlaw@...> wrote: Dennis smd components are easy to solder. Coils are also easy to wind. You just have to give it a try. Lawrence
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Re: Struggling with tuning clicks and birdie sounds
This can usually be fixed by adding some capacitors, rearrange wiring, etc.
See earlier posts about tuning clicks and how to reduce/prevent them.
73 Allard PE1NWL
toggle quoted message
Show quoted text
On Wed, June 7, 2017 10:14, DJ4MU wrote: Allard,
Thanks for the Tip about the older versions.
i just downloaded and tried the 1.13 version as well and can't hear any
difference.
so it seems to be a general problem with the radio i guess.
73 Philipp DJ4MU
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Jerry,
It's OK, we all make dumb mistakes, I've made many in my career, it's how we learn, hopefully.
Best regards,
Peter VK1XP
toggle quoted message
Show quoted text
On 07-06-2017 15:08, ohwenzelph via Groups.Io wrote: Hey Peter,
I will check it out. For the vu2ese one I was putting it just before
the speaker, I guess it should be before the volume pot. The way I
have looked at it they both seem to stick a big resistance right in
the audio path.
Thanks for the reply. With all the soldering and unsoldering i do
worry about how much lead is getting into my brain though... could
explain some of my not getting it, I guess.
Jer AA1OF
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Re: Struggling with tuning clicks and birdie sounds
Allard,
Thanks for the Tip about the older versions.
i just downloaded and tried the 1.13 version as well and can't hear any difference.
so it seems to be a general problem with the radio i guess.
73 Philipp DJ4MU
|
Re: Struggling with tuning clicks and birdie sounds
Philipp,
Thanks for reporting this.
v1.14 was released only last night.
I'm wondering, did you have the same problem with previous version v1.13
or before? You can still download earlier releases from
In other words: is this problem specific to the newly released sketch, or
is it a general problem with your radio?
73 Allard PE1NWL
toggle quoted message
Show quoted text
On Wed, June 7, 2017 09:38, DJ4MU wrote: Trying to set up my BitX with Allard's version 1.14
and Jason's etherkit Si5351 version 2.0.1 Library
I'm struggling with a clicking background noise, tuning clicks and
especially distortions while trying to set the offsets.
see attached [video]() for further
explanation.
Beginner here so not sure which of it is still within normal limits .
i'm a little lost on what to search for as this ,while by far not my first
electronics , is my first Radio,
Any suggestions on what to measure or try to diagnose and fix this problem
would be helpful.
vy 73
Philipp DJ4MU
|
Struggling with tuning clicks and birdie sounds
Trying to set up my BitX with Allard's version 1.14
and Jason's etherkit Si5351 version 2.0.1 Library
I'm struggling with a clicking background noise, tuning clicks and especially distortions while trying to set the offsets.
see attached for further explanation.
Beginner here so not sure which of it is still within normal limits .
i'm a little lost on what to search for as this ,while by far not my first electronics , is my first Radio,
Any suggestions on what to measure or try to diagnose and fix this problem would be helpful.
vy 73
Philipp DJ4MU
|
Re: Low mic gain and rf power
Hello ?Joe,
The buttons are not wired at the moment - I just try to start the radio up now :). ?I intend to use them in the future :
B1 - Mode switch LSB/USB/CW/DIGI
B2 - SPLIT/RIT/NORMAL
B3 - SWAP A/B
B4 - A->B
Of course I must add those ?functions in software.
Regards
Jirka
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Re: uBITX - A reboot of the old BITX
Dennis smd components are easy to solder. Coils are also easy to wind. You just have to give it a try. Lawrence
On Wed, May 10, 2017 at 5:49 PM, Dennis Zabawa <kg4rul@...> wrote: Things to consider if a uBITX kit is ever offered: - A kit without the SMD parts already installed is out of the skill set for a LOT of builders. ? - A source for pre-wound inductors would also be greatly appreciated.
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Re: 300Km with a bicycle and my Bitx40
Hello Julien!
What a nice article! too bad it is only available in French....The entire website? should also be translated in English, there are plenty of great ham related articles! Anyway : good job! Cheers, Jeremy? F4HKA
On Wed, Jun 7, 2017 at 3:20 AM, Doug W <dougwilner@...> wrote: Looks like an interesting trip. ? You might want to look at an end fed half wave antenna EFHWA so you don't have to pack the fishing rod. You can find plenty of plans and kits online.? I am using this one?
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Re: uBITX - A reboot of the old BITX
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Craig Wadsworth
Allard PE1NWL