Today I have tested some different Raduino Version for Tuning Clicks and that dammed 7.200MHz Birdie etc.
let us start with V1.14 there is a lot of functions in it I do not need and to my big surprise it produce more noise, tuning clicks and a stronger birdie then the old V1.01.
Raduino V1.01 birdie at 7.200MHz is very low in signal, only thing I really missed is support for 10 Turn Pot.
ND6T software low noise and low signal Birdie, but I do not like shuffle tuning

result is I am going to use the old version since I have other Rigs for CW on 7MHz

On Sat, Jun 10, 2017 at 12:18 pm, OZ9AEW wrote:

let us start with V1.14 there is a lot of functions in it I do not need and to my big surprise it produce more noise, tuning clicks and a stronger birdie then the old V1.01.

Hmm, surprising.
The sketch provides more functions, but if they are not being used they can't generate extra noise or birdies.
Did you use v1.14 or v1.14.1? There was indeed a small bug in 1.14 which caused some ticking noise, and it was corrected in 1.14.1.
And have you tried different VFO drive levels to minimize the birdie?

Another thought: Perhaps the noise comes from the hardware modifications related to the sketch. Perhaps some extra noise is picked up by the wires to/from the function button, PTTsense, CW carriers ,etc?

73 Allard PE1NWL

Anyone tried to put the raduino into a faraday enclosure like the old times ?

开云体育

it was V1.14 since I have note noticed release of V 1.14.1

there is only VFO, Cal. Button and Mic. connected in my Bitx40, I am only going to use it on LSB !
I have a lot of 7MHz CW Rigs from about 200mW to 750mW and there is a Regen set on workbench for CW ( 7.000 to 7.100 MHz ) in two version..... one for about 2 W and one for 30 W

As mentioned already please try v1.14.1
Please also make sure you're using the correct SI5351 library. It MUST be v2.01 (later versions are known for strong tuning clicks).

If it doesn't work for you you can always try earlier versions with less functionality.
All earlier releases are available at

For example v1.04 supports 10-turn tuning pot, but it doesn't have all the extra functions yet.

73 Allard PE1NWL

all version is now tested !
and V1.01 to V.05 have lower noise and let signal on the 7.200 Birdie !
can it have something to do with the new display command ?

all are compiled with S5153 V2.01

That's very interesting!
Many thanks for testing.
I will try on my own BitX and see if I can reproduce this.
Will keep you posted.

73 Allard PE1NWL

I've tried several old versions here on my own BitX40, but I could'nt reproduce your findings.
I can't hear any noticable difference with regards to the tuning clicks or noise from the Raduino.

So I'm puzzled about your findings.

Are you using a standard BITX40 and a standard Raduino?
Did you already install any mods (extra capacitors, shielding, etc) to reduce the noise and tuning clicks?

73 Allard PE1NWL

bitx is 100% stock except from a 7808 with .1uf and 2200uf on both input and output placed between on/off and Raduino board, it reduce tuning click to nearly nothing, but that 7.200MHz Birdie is really strong !
I have think about rewire everything with shielded cable and solder them instead of use connectors

On Mon, June 12, 2017 09:10, OZ9AEW wrote:

bitx is 100% stock except from a 7808 with .1uf and 2200uf on both input
and output placed between on/off and Raduino board, it reduce tuning click
to nearly nothing, but that 7.200MHz Birdie is really strong !
I have think about rewire everything with shielded cable and solder them
instead of use connectors

Adding capacitors as you did can indeed reduce the tuning click issues,
but will not have an effect on the 7199 kHz birdie.

Regarding the birdie: Have you already tried different VFO drive levels?

In early raduino versions the drive level was set to 2mA, as from v1.05
the default became 4mA but you change change it in the SETTINGS menu
(possible values are 2,4,6,8mA). The correct setting of the drive level
can have a great effect on the strength of the birdie in LSB mode.
It seems there is some variability between BitX radios, most have best
results with 4mA but in some cases a different value is better.

73 Allard PE1NWL

I thought drive level was 1mA... during checking of the alignment process i followed instructions given in hfsignals... this has to be updated as i have checked over and over in order to soove this (i even thought my instruments were not ok) ?

On Mon, June 12, 2017 11:22, EA3IAV wrote:

I thought drive level was 1mA... during checking of the alignment process
i followed instructions given in hfsignals... this has to be updated as i
have checked over and over in order to soove this (i even thought my
instruments were not ok) ??‘?

Please don't confuse VFO drive level with PA drive.

The drive level I am refering to is the VFO drive level, not the PA drive.

The VFO drive level is a software parameter in the SI5351 library, and it
controls the output strength of the Raduino VFO.

It has nothing to do with alignment of the PA.

73 Allard PE1NWL

On Mon, June 12, 2017 11:22, EA3IAV wrote:

I thought drive level was 1mA... during checking of the alignment process
i followed instructions given in hfsignals... this has to be updated as i
have checked over and over in order to soove this (i even thought my
instruments were not ok) ??‘?

Please don't confuse VFO drive level with PA drive.

The drive level I am refering to is the VFO drive level, not the PA drive.

The VFO drive level is a software parameter in the SI5351 library, and it
controls the output strength of the Raduino VFO.

It has nothing to do with alignment of the PA.

73 Allard PE1NWL

it have been tried with "hardcode" value, but as it is Band limit is 7,200MHz in Europa ( as you know ) I won't let it destroyed my day !
it will be use as it is until I have another 10 turn pot. at home, the cheap Mexico goes crazy ?on some points !
about confuse ufo and pa level...let us just say I have build arp rig for so many year that it do not happened .... got my class D license back in 1992, and pass cw test back in 1993 and today I have a class A license?