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CW/TUNE BUTTON INSTALLITION
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I am in the process of setting up a straight key and a tune button. Most of the instructions seem straight forward but I have a couple discrepancy's maybe due to inexperience.
In the tx-rx photo it shows 4k7 inline with a transistor. Do they mean 47k or 4.7k resistor maybe? And in the sidetone wiring photo it looks like they have a 1k and 47ohm resistor in series with the positive lead of the speaker input on the board am I interpreting it right? Barrett KG5SSO |
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Do you have the links for that? I would like to check it out and some features to my BITX. Thanks. 73 Ben KD2NOU? On Wed, Nov 1, 2017 at 1:30 PM Barrett O <ogebarrett@...> wrote: I am in the process of setting up a straight key and a tune button. Most of the instructions seem straight forward but I have a couple discrepancy's maybe due to inexperience. -- Ben KD2NOU |
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On Nov 1, 2017 1:57 PM, "Ben Piecora" <piecorab@...> wrote:
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Hi Barret
The tune/spot button resistor is indeed 4.7K and that value worked fine for me.? The two resistors to the speaker are not in parallel as such, the 1K cuts the level of the output from the Radiuno to a level that wont overload the speaker/short out the nano pin. The 47ohm is I think a way to prevent the raduino output impacting the audio stage. This works. However, I found that the audio level in normal receive is considerably reduced by the 47ohm resistor.? So receive audio is now not really loud enough for me on weak signals, even at maximum volume.? I am thinking about that one now, might try reducing the 47 ohm resistor.? Best regards Jim |
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