Transformer problems
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Transformer problems
I am building a low power AM transmitter and it showed a 6 pin transformer but the only one I can find is a 5 wire transformer, Help! I cant make my radio work, is this because of the transformer or something else, also there is no p on it to determine what side goes where.
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Re: Transformer problems
eicpiemann - I need a little more information on the design and the transformer. Usually in a simple AM transmitter design, the transformer is an audio output transformer that is used to modulate the power output of the transmitter carrier wave. Typically it is a two winding design, so only 4 connections are available. You may have an audio transformer with a center-tapped primary and a single winding secondary, or a total of 5 connections. If that is the case, you can ignore the center-tap connection and just have a 4 connection, two winding transformer. Any other information on the transformer may be helpful. If you still have difficulties, perhaps you can attach a copy of the schematic and bill-of-materials.
Rick Marz
Rick Marz
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Re: Transformer problems
Hi eicpiemann - are you following the instructions in this Science Buddies project?
https://www.sciencebuddies.org/science- ... #materials
If so, is there a reason you weren't able to purchase the suggested transformer from Jameco?
http://www.jameco.com/webapp/wcs/stores ... llDownView
Rick, if he is doing that project, the schematic is on this page: https://www.sciencebuddies.org/science- ... #procedure
https://www.sciencebuddies.org/science- ... #materials
If so, is there a reason you weren't able to purchase the suggested transformer from Jameco?
http://www.jameco.com/webapp/wcs/stores ... llDownView
Rick, if he is doing that project, the schematic is on this page: https://www.sciencebuddies.org/science- ... #procedure
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Re: Transformer problems
eicpiemann - When I looked at the experiment details, they did not provide a schematic diagram. I think that's important and I'm suggesting to Ben that the experiment details be updated to include it. Attached is a typical schematic showing the connections to an audio transformer that has 1000Ω to 8Ω windings. It also shows the 5th connection that you referred to, which I mentioned is the unused 'center tap' for this project. Assuming your transformer is close to these specifications, you should see the transmitter work in the AM band.
Rick Marz
Rick Marz
Last edited by rmarz on Fri Mar 24, 2017 2:02 pm, edited 1 time in total.
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Re: Transformer problems
Rick - there's a schematic on the background tab of the project, see Fig 2:
https://www.sciencebuddies.org/science- ... background
[edited this post to avoid future confusion - Rick and I discussed and confirmed that the schematic in Fig 2 of the background is correct]
https://www.sciencebuddies.org/science- ... background
[edited this post to avoid future confusion - Rick and I discussed and confirmed that the schematic in Fig 2 of the background is correct]