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 Homebrew CTCSS Tone Encoder for my Yaesu FT290r

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Victor
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Victor


Call Sign : 26-CT-3228 Ham M7VIC
Posts : 2498
Times Thanked : 170
Join date : 2019-11-10
QTH or Location : Bedford
Equipment Used : Various

yaesu - Homebrew CTCSS Tone Encoder for my Yaesu FT290r Empty
PostSubject: Homebrew CTCSS Tone Encoder for my Yaesu FT290r   yaesu - Homebrew CTCSS Tone Encoder for my Yaesu FT290r Icon_minitimeSun Aug 22, 2021 11:19 am

Hiya All,

Hope you're all keeping well and enjoying your radio. Smile


A little while back I made a CTCSS Encoder for my 1970's vintage Yaesu FT227ra :-

https://charlietangodxgroup.forumotion.com/t3088-homebrew-ctcss-tone-encoder?highlight=CTCSS

Works well, still working so job's a good'un. yaesu - Homebrew CTCSS Tone Encoder for my Yaesu FT290r 1f44d 


My Yaesu FT290r All-Mode despite repairing it after a kind donation, (thanks again Koenraad!), and modifying it to have SSB RF Speech Processing still doesn't have CTCSS.....

So I set about rectifying that. Smile

Now, once again I could have taken the 'simple' path and forked out for a CTCSS board, but where's the fun in that?
So I got the breadboard out and decided to muck about with another design I'd seen that was much simpler than my last one. Unfortunately I can't find the original documents/web page where I saw it so just had to work from the few notes I feverishly scribbled in my notebook at the time.

This circuit was so much better, a dual op-amp in a single chip, simple regulation with a zener and it produces the most beautiful sine-wave I've ever seen! Very stable, nice and clean so should be just the job. 

Much smaller too so out came my bestest reading glasses and cut my old bear paw claws/fingernails to handle it! Very Happy

Et Voila :-

yaesu - Homebrew CTCSS Tone Encoder for my Yaesu FT290r Ctcss_14

None too shabby and miles smaller than the last one so should squeeze into the FT290 without problems.

.....unfortunately I cut the board down to size, so had to add another bit of board to mount it inside the radio. Doh!

After a bit of tracing the circuitry in the radio for the wiring I even managed to mount the whole thing where the original CTCSS unit would have sat :-

yaesu - Homebrew CTCSS Tone Encoder for my Yaesu FT290r Ctcss_15

Went in well.

The nice thing about doing this is that I can use the original switch to turn the CTCSS off saving a few mA of power for when I get her running on batteries again.


Now, once again the same as my last tone-board this one only produces a 77Hz tone......which will do fine for the repeaters I can get to on my dismal VHF setup. Wink

Until I get on with my plans for a 2m Yagi....


It seems to work well with a variety of dual op-amps, (of which there are many), and I tested the breadboard version out with all the ones I have in my parts/junk boxes. That includes some surface mount versions so I may even be able to make a unit small enough to squeeze in on my old Kenwood Trio TR-2500 handy! If my eyesight and bear paw hands can manage it of course. Very Happy


So, thanks once again for putting up with my 'waffle'.

I enjoyed building and installing this board, occupied a few hours of time and kept the old grey matter working.
I've already dragged an old 1970's radio up to date and now I've dragged a 1980's vintage radio to join her too. Love it! Smile


All the best,
Victor

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John123
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John123


Call Sign : 26CT763
Posts : 2391
Times Thanked : 71
Join date : 2019-06-27
QTH or Location : Manchester
Equipment Used : Optima, Superstar 360fm, Stalker 9fdx, President Jack
Age : 47

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PostSubject: Re: Homebrew CTCSS Tone Encoder for my Yaesu FT290r   yaesu - Homebrew CTCSS Tone Encoder for my Yaesu FT290r Icon_minitimeSun Aug 22, 2021 12:57 pm

Nice work, Victor.👍😎

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Paddy
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Paddy


Call Sign : 26CT2727
Posts : 549
Times Thanked : 41
Join date : 2019-07-08
QTH or Location : Stockport
Equipment Used : Icom 7300. Icom 705, Yaesu FTM400XD and a Yaesu FT70.
Age : 56

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PostSubject: Re: Homebrew CTCSS Tone Encoder for my Yaesu FT290r   yaesu - Homebrew CTCSS Tone Encoder for my Yaesu FT290r Icon_minitimeSun Aug 22, 2021 1:36 pm

Nothing gives me greater pleasure than posts like this Victor. I really look forward to a day when maybe I could attempt something like this. This hobby is just the most diverse hobby there is, I love it and have only scratched the surface of what can be achieved within it. Great Post Victor and Great Job, thanks for sharing this.

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26CT2727
https://www.qrz.com/db/2E0TWD

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Victor
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Victor


Call Sign : 26-CT-3228 Ham M7VIC
Posts : 2498
Times Thanked : 170
Join date : 2019-11-10
QTH or Location : Bedford
Equipment Used : Various

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PostSubject: Re: Homebrew CTCSS Tone Encoder for my Yaesu FT290r   yaesu - Homebrew CTCSS Tone Encoder for my Yaesu FT290r Icon_minitimeSun Aug 22, 2021 4:51 pm

Cheers John, much appreciated mate. Smile

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Victor
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Victor


Call Sign : 26-CT-3228 Ham M7VIC
Posts : 2498
Times Thanked : 170
Join date : 2019-11-10
QTH or Location : Bedford
Equipment Used : Various

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PostSubject: Re: Homebrew CTCSS Tone Encoder for my Yaesu FT290r   yaesu - Homebrew CTCSS Tone Encoder for my Yaesu FT290r Icon_minitimeSun Aug 22, 2021 4:59 pm

Hiya Paddy,

Thanks very much mate. 


It's all about getting some enjoyment from what we do with radio and for me it just happens to be building stuff. Wink
Been planning to this for some time, so at least it's another job ticked off the ever growing list!

The surprising bit that I really enjoy is seeing the enjoyment in others radio pursuits no matter what the path of interest. If that enjoyment shows, it pleases me no end. yaesu - Homebrew CTCSS Tone Encoder for my Yaesu FT290r 1f44d 


All the best to you mate,
Victor

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PostSubject: Re: Homebrew CTCSS Tone Encoder for my Yaesu FT290r   yaesu - Homebrew CTCSS Tone Encoder for my Yaesu FT290r Icon_minitime

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