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Re: : Digital VFO Si570 Software Availability

ah.electronics@...
 

Hi Larry

Yes the only part of the original project that was not open source was the Firmware IC on the SI570 Digital VFO.

There are lots of designs freely available on the internet for Arduino driven DDS/VFO's just make sure that the design you choose can provide sufficient output to drive a Double Balanced Mixer (ADE-1) or add a suitable buffer stage to deive the DBM.

Any further questions please do not hesitate to post a message in the forum.

Regards

Andy de G6LBQ
Digital VFO Si570 Software Availability

lh1907@...
 

After reviewing the G6LBQ (All_Things_Multiband) File folder info, it appears the only build info which? is not open source for personal amateur radio use is the Digital VFO Si570 Software. ? Is this true or do I need to review another folder of info in File section?

If it is true, then my first step on the Multiband project is to use an Arduino (Nano or ProMini) to implement the Si570-based software using the Digital VFO Si570 schematic and Operation Manual as a starting point guide.

Larry, W2HHV
componant layout for the mk1 excieter ,lpf,bpf,xtal filter.

daveg0ayd@...
 

hello,

whilst clearing out a silent key came across? your boards but nothing else can you help please.regards dave.
Re: : request

ah.electronics@...
 

Hi Lakshmanan

At this time there are no PCB's left so the only option is to etch your own PCB's or build Manhattan style.

Regards

Andy de G6LBQ
request

Lakshmanan Sundaram
 

Hi D6LBQ OM Andy Hunter , I am Lakshmanan, 57 years Indian Ham Radio operator, got license from 1994,
very much interested in home brewing HF transceiver , I would like to assemble multi band Bitex-III, I request
you to add me in your group, how much I need to pay for the pcb, please let know, bye,73!
PC Boards

"Adrian Rees (MW1LCR)"
 

Hi Andy

Have you any PC boards, kits or parts left over ?

I'm interested in the RX bandpass filters, PA, & main boards. With or
without components.

Cheers

Adrian MW1LCR
SDR KITS VFO

Giuseppe Marullo
 

I did on a BITX20a, even though it is not finished... use VFO-IF settings, like 25MHz - IF(11MHz) and you land on 20m. Didn't use it extensively but it should work, result is the same.

Only beware that IF tuning is reversed, ie base frequency +300..+3000Hz is then -3000..-300-base frequency.

Let me know how it works out for you, I am working on different stuff at the moment but I even stuffed a micro 16x2 LCD display on a BITX20a case.

Giuseppe Marullo

IW2JWW - JN45RQ
Re: : vu2rgq

reji mon
 

hi dear Om Andy.......Thanks a lot for the suggestion...
regards
Rejimon G (VU2RGQ)

From: ah.electronics@... [G6LBQ] ;
To: ;
Subject: [G6LBQ] Re:: vu2rgq
Sent: Tue, Jul 12, 2016 10:30:35 AM

?

Hi


Either method will work but I would go with ?drawing revision 1.6 last updated on 14th Feb 2015.

Regards

Andy

Latest Group Approvals

ah.electronics@...
 

Hi


My apologies for the long delay approving the latest members requesting to join the group. Due to a family bereavement all activities radio related have been very limited.


Kind regards


Andy de G6LBQ?
Re: : vu2rgq

ah.electronics@...
 

Hi

Either method will work but I would go with ?drawing revision 1.6 last updated on 14th Feb 2015.

Regards

Andy
SDR KITS VFO

johnjdignan@...
 

HI All,

Any body used one of these with a bitx? ?The problem with the one I've just built is that it has only an option for a 'positive' IF ...bitx needs negative... any ideas ho to get around this problem?

Best regards

John J. Dignan M0JJD
vu2rgq

reji mon
 

hi dear Andy...I started assembling your Bitx MK2 project...but there's one doubt.. Should I follow the revised schematic published on14 February 2015, were the Coil T1 is avoided.
thanks and regards
VU2RGQ

From: G6LBQ@... ;
To: ;
Subject: [G6LBQ] New file uploaded to G6LBQ
Sent: Mon, Jun 20, 2016 1:32:02 PM

?


Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the G6LBQ
group.

File : /Arduino-Si5351 Sketch VFO-BFO-Beta revised 6-20-2016/AnaButtons.tar.bz2
Uploaded by : co6bg
Description : Schematic

You can access this file at the URL:
https://uk.groups.yahoo.com/neo/groups/G6LBQ/files/Arduino-Si5351%20Sketch%20VFO-BFO-Beta%20revised%206-20-2016/AnaButtons.tar.bz2

To learn more about file sharing for your group, please visit:
https://help.yahoo.com/kb/index?page=content&y=PROD_GRPS&locale=en_GB&id=SLN15398

Regards,

co6bg

New file uploaded to G6LBQ

G6LBQ@...
 

Hello,


This email message is a notification to let you know that
a file has been uploaded to the Files area of the G6LBQ
group.


File : /Arduino-Si5351 Sketch VFO-BFO-Beta revised 6-20-2016/AnaButtons.tar.bz2
Uploaded by : co6bg <juancarlos@...>
Description : Schematic


You can access this file at the URL:



To learn more about file sharing for your group, please visit:



Regards,


co6bg <juancarlos@...>
New file uploaded to G6LBQ

G6LBQ@...
 

Hello,


This email message is a notification to let you know that
a file has been uploaded to the Files area of the G6LBQ
group.


File : /Arduino-Si5351 Sketch VFO-BFO-Beta revised 6-20-2016/arduino-arcs.tar.bz2
Uploaded by : co6bg <juancarlos@...>
Description : Skectch-


You can access this file at the URL:



To learn more about file sharing for your group, please visit:



Regards,


co6bg <juancarlos@...>
New file uploaded to G6LBQ

G6LBQ@...
 

Hello,


This email message is a notification to let you know that
a file has been uploaded to the Files area of the G6LBQ
group.


File : /AnaButtons.tar.bz2
Uploaded by : co6bg <juancarlos@...>
Description : Schematic-


You can access this file at the URL:



To learn more about file sharing for your group, please visit:



Regards,


co6bg <juancarlos@...>
Re: : Am or fm modulation

kon.stamou@...
 

I am a little confused so as start from
Receive part in order to receive Am or Fm modulation the only thing I need is wider filter. Especially for fm mod I think wider filter is not enough....

In the transmitter part now us I understand the things is a little more complex I need to do the modulation in the vfo part exactly for fm?
For am now is enough wider filter or must I do also something more?
Xtal filters for project Irwell

ah.electronics@...
 

Hi Everyone


I have posted some information and images of the xtal filter modules I will be using in the Irwell transceiver project.


You can take a look at the images and info at the following web link:


?

If the above link fails to work just head over to the Files section and locate my Irwell project folder to view the files.


73 from Andy de G6LBQ
HAMBAY has arrived!

ah.electronics@...
 

Hi Everyone


Our good friend and co-founder of DXKits Adrian Lane (2E0SDR) has just informed me about a new internet website he has recently launched.


Adrian has developed and launched the website


Hambay provides a one stop solution for buying and selling amateur radio equipment online.


The website is neatly organised and has categories covering all aspects of our hobby and is easy to navigate.


If you have any unwanted radio related items why not support Adrian by visiting his website where you can?

register and post adverts for FREE!


Regards


Andy de G6LBQ
Re: : Rumors of the Irwell project...

ah.electronics@...
 

Hi John

Great to hear from you and hope you are keeping well.

I do hope to include FM as a mode on my Irwell project and so far I have tested FM in the receive chain and that works fine.

Regards FM transmit I intend to try phase modulation using a xtal oscillator followed by a multiplier chain that will be mixed with the digital VFO. ?It is also possible to create FM with an SI571 but I have yet to find any evidence of this being done with a degree of success. DDS chips like the AD9850 can be phase modulated through software but as I lack the programming skills to do this it wont be an option. Any input in this area will be welcome!

The receive side is almost complete and so far this has been built in modular fashion which allows easy changing and experimenting of the modules.

I am finding it difficult to engineer a reproducible crystal filter for AM mode but this could be down to the choice of xtals being used so I have just etched a PCB for a new test jig that will allow me to experiment more easily... I will try and post some pictures etc of the current filter modules later today.

The Irwel is an ambitious project that requires an enormous amount of development time, unfortunately I have not had the free time needed to devote to the project so its development has been very slow.

Despite the time constraints I am as keen as ever to complete this project and I soon hope to finalize all things on the receive side so that the receiver can be used and enjoyed whilst I work on the transmit side of things.

By keeping the project modular it will be possible to build up just a multi-mode communications receiver with the option to turn it into a transceiver.

Anyway enough from me for now. ?

Regards?

Andy de G6LBQ
Rumors of the Irwell project...

johnjdignan@...
 

HI Andy

It's been a while since we last spoke... I hear your new project will be a modular design... will it have FM? I've not had a lot of time to play radio this last 12 months but I'm between jobs and I'd like to catch up on any new developments... and if you do have FM on the cards what VFO will ?you be using? ...Do you have a synopsis of your new project to share yet?

Best regards

John.
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