SINUS B1 PROJECT

Everything technical about radio can be discussed here, whether it's transmitting or receiving. Guides, charts, diagrams, etc. are all welcome.
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Re: SINUS B1 PROJECT

Post by sinus trouble » Thu Aug 06, 2020 11:44 pm

Cheers Albert! :)

Its a great little circuit, Not at all perfect but it does the job!

Its a shame that DAB took the B3 spot! I would have gone for that as a link.

The antenna for B1 are certainly not ideal being nearly 2.5 metres long? The B1 spectrum is literally dead around my area these days so it gives my low power TX a near interference free space.

But yeh its a work in progress. :)
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Re: SINUS B1 PROJECT

Post by sinus trouble » Thu Aug 06, 2020 11:52 pm

Some rough measurements of the receiver at work!

Below is the local oscillator tuned to 44.3Mhz (Ish) which gives me an approximate 55Mhz receive frequency.
B1 Local.PNG
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Re: SINUS B1 PROJECT

Post by sinus trouble » Fri Aug 07, 2020 12:08 am

Here is the 10.7Mhz Intermediate frequency which emerges from the Ceramic Filter.

The test was performed with both TX and RX terminated with a 47 ohm resistor, No antenna!

The amplitude varies with proximity, The 10.7 on pin 8 (IF OUT) is much smoother and lightly compressed.
B1 IF.PNG
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Re: SINUS B1 PROJECT

Post by radium98 » Sat Aug 08, 2020 9:00 pm

good work :) my freind sinus keep it up ,it is a good to add that squelch circuit and a little lm386 amplifier audio
thanks

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Re: SINUS B1 PROJECT

Post by Albert H » Sun Aug 09, 2020 4:23 am

It's also good to add a broadly tuned input stage (or an aperiodic, broadband one). You can then accurately match your receive aerial and feedline to the input of the filter.

A further refinement is AFC, which is good for correcting drift in the LO (and in the link rig too!).
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Re: SINUS B1 PROJECT

Post by radium98 » Thu Aug 13, 2020 5:27 pm

Sinus any testing video ? :) to get inspired .Thanks

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Re: SINUS B1 PROJECT

Post by sinus trouble » Fri Aug 14, 2020 12:21 am

Albert H wrote:
Sun Aug 09, 2020 4:23 am
It's also good to add a broadly tuned input stage (or an aperiodic, broadband one). You can then accurately match your receive aerial and feedline to the input of the filter.

A further refinement is AFC, which is good for correcting drift in the LO (and in the link rig too!).
Cheers Albert :)

Im not sure what you mean by a broadly tuned input? Receivers are quite new to me but im still working on it! :)

Any guidance is always welcome! :)
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Re: SINUS B1 PROJECT

Post by sinus trouble » Fri Aug 14, 2020 12:43 am

radium98 wrote:
Thu Aug 13, 2020 5:27 pm
Sinus any testing video ? :) to get inspired .Thanks
Hello Radium :)

Thank You for the squelch circuit you sent, A very interesting concept.

Strange i know, But i do have love of the 'White noise' I guess im getting old. :)

I do have a youtube channel but i do not post any of my projects in fear of attracting the wrong attention?

But never say never? I may just do that soon? :)

PS I hope you and your family are well? My thoughts go out to all those affected by recent events! :(
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Re: SINUS B1 PROJECT

Post by radium98 » Fri Aug 14, 2020 7:26 am

my humble thanks my freind .look i am getting old too haha i do also love that whithe noise .it was only an option to thats all my freind ,thank you again .you can post it here just to get inspired on how things are going ,because i am far to make one .Thanks Sinus .

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Re: SINUS B1 PROJECT

Post by Bton-FM » Fri Aug 14, 2020 10:33 am

radium98 wrote:
Fri Aug 14, 2020 7:26 am
my humble thanks my freind .look i am getting old too haha i do also love that whithe noise .it was only an option to thats all my freind ,thank you again .you can post it here just to get inspired on how things are going ,because i am far to make one .Thanks Sinus .
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Re: SINUS B1 PROJECT

Post by XXL » Fri Aug 14, 2020 12:47 pm

Hate to be cheeky but would you post the PCB drawing lol ?

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Re: SINUS B1 PROJECT

Post by radium98 » Fri Aug 14, 2020 7:52 pm

@Bton-FM yes i am ,thank you .the blast was nearby.

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Re: SINUS B1 PROJECT

Post by sinus trouble » Sat Aug 15, 2020 1:05 am

radium98 wrote:
Fri Aug 14, 2020 7:26 am
my humble thanks my freind .look i am getting old too haha i do also love that whithe noise .it was only an option to thats all my freind ,thank you again .you can post it here just to get inspired on how things are going ,because i am far to make one .Thanks Sinus .
Thanks Radium :)

I admire your courage to do what you do for free speech! Here in the UK, I would probably get a slap on the wrist for radio offences!

Anyways i will try to put a video together sometime? I dunno which format? but i will see what Radionecks will allow? :)
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Re: SINUS B1 PROJECT

Post by sinus trouble » Sat Aug 15, 2020 1:13 am

XXL wrote:
Fri Aug 14, 2020 12:47 pm
Hate to be cheeky but would you post the PCB drawing lol ?
Hello XXL :)

The PCB for the receiver is in Gerber format? I do have some PDF versions? It is a double sided PCB but it is possible to construct manually with a bit of trial and error?

I do have a prototype that i etched a while back which worked well.

I will post a pic to show what i mean! :)
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Re: SINUS B1 PROJECT

Post by sinus trouble » Sat Aug 15, 2020 1:21 am

20200526_163514.jpg
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Re: SINUS B1 PROJECT

Post by sinus trouble » Sat Aug 15, 2020 1:29 am

The top layer was simply masked out during the etching process, then clearance around components was created using a 3mm drill bit!

The IF coil and Quadrature coil were hand wound on 'Skeleton' formers! Thankfully Enigma had the correct TOKO components to save me from this labour intense process! :)
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Re: RE: Re: SINUS B1 PROJECT

Post by Electronically » Sat Aug 15, 2020 1:29 am

sinus trouble wrote:
20200526_163514.jpg
Christ no seen a toko coil in years last time I saw one of those was in an old 20 watt and a 12 watt. But looks tidy sinus good job.

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Re: SINUS B1 PROJECT

Post by sinus trouble » Sat Aug 15, 2020 1:48 am

Cheers Electronically :)

They are like gold dust these days! I would defo recommend them from Enigma! The slug gives a nice smooth and tight tune! Not flapping about like a 'sausage down an alley' LOL
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Re: RE: Re: SINUS B1 PROJECT

Post by Electronically » Sat Aug 15, 2020 1:55 am

sinus trouble wrote:Cheers Electronically :)

They are like gold dust these days! I would defo recommend them from Enigma! The slug gives a nice smooth and tight tune! Not flapping about like a 'sausage down an alley' LOL
Lol flapping about like coat hangover on 90mph winds. Egnima are allright but only limited stuff they have. I like a website that would make me go wow so much selection spoilt for choice sort of thing. Just seems I only browse that site for a minute if it was like double the stock I would be looking at more but it is what it is I suppose.

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Re: SINUS B1 PROJECT

Post by sinus trouble » Sat Aug 15, 2020 2:17 am

Totally agree!

I guess it is a question of what you are looking for?

I generally as a rule of thumb go for the supplier who can supply quality and not price! I perform many repairs on customers equipment, mainly audio based.

I need to know that the parts i fit will work first time! Every time!
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