# Help with GRC and 3.7

**URL:** <https://www.ruby-forum.com/t/help-with-grc-and-3-7/234008>\
**Category:** GNU Radio\
**Created:** [January 30, 2015, 11:17am UTC](https://www.ruby-forum.com/t/help-with-grc-and-3-7/234008 "2015-01-30T11:17:43Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [January 30, 2015, 11:17am UTC](https://www.ruby-forum.com/t/help-with-grc-and-3-7/234008/1 "2015-01-30T11:17:43Z")

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I have a GRC flowgraph that was given to me about three years ago and  
installed gnuradio 3.7 from add-apt-repository ppa:gqrx/releases but  
It is missing several blocks, I tried to piece the puzzle back with  
the missing blocks but haven’t been able to make it work. I think some  
of the filters are wrong. Can someone help me convert this to use the  
GRC / 3.7 and the RTL-SDR Source? I posted the old one at  
[rxgnuradiopaste - Pastebin.com](http://pastebin.com/6D6HwNnQ) Its just a dual NBFM RX with squelch.  
Thanks,

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**Author:** ![chris\_brisendine](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/9f8e36/32.png) [@chris\_brisendine](https://www.ruby-forum.com/u/chris_brisendine)\
**Post date:** [February 7, 2015, 2:41pm UTC](https://www.ruby-forum.com/t/help-with-grc-and-3-7/234008/2 "2015-02-07T14:41:44Z")

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Hi chris,

i installed the GRC 3.7 via the build-script  
([http://www.sbrac.org/files/build-gnuradio](http://www.sbrac.org/files/build-gnuradio)) from GNURadio. With the  
build script a lot of blocks will be installed. The RTL-SDR source will  
be installed and works. I think the result of the build-script is a good  
and working GNURadio base.

Then you could try to open your project.

Andy

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**Author:** ![chris\_brisendine](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/9f8e36/32.png) [@chris\_brisendine](https://www.ruby-forum.com/u/chris_brisendine)\
**Post date:** [February 7, 2015, 2:50pm UTC](https://www.ruby-forum.com/t/help-with-grc-and-3-7/234008/3 "2015-02-07T14:50:23Z")

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Hello Chris,

the file was build using GNU Radio 3.6.X or earlier. 3.7 renamed and  
reorganized most blocks.  
Most of the time, simply searching the block list (ctrl+f) with the  
interesting part of the red “missing” blocks will give you what you  
need.

Greetings,  
Marcus