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Aes am transmitter not as clear as regular radio broadcast
6/27/2004 3:21:43 PMSean
Hello, I am looking at my transmitter and it appears to only have a half wave rectifier diode in it. Transformer doesnt have a center tap. So I thought I would add the 3 remaining diodes it lacks and make the rectifier a full wave bridge. I dont think that will matter much. The attempt is being made because there is a 1 volt ripple on the b+, and I think that might be the cause of the distortion. The filter consists of a pie filter of two 33uf caps and a 2.2kohm resistor.I have tried adjusting the volume of the input device and it doesnt help. There is no hum in the radio when its tuned to the transmitter(I have tried several of my radios).
6/27/2004 5:13:57 PMNorm Leal
Hi Sean

You can change a half wave rectifier to a full wave bridge as long as you don't need one lead of the transformer grounded. Both - & + come off of diode/cap junctions. Have you tried higher capacity for filters. One after the 2.2k resistor can be increased to almost any value without a problem, 100 mfd?

Norm

:Hello, I am looking at my transmitter and it appears to only have a half wave rectifier diode in it. Transformer doesnt have a center tap. So I thought I would add the 3 remaining diodes it lacks and make the rectifier a full wave bridge. I dont think that will matter much. The attempt is being made because there is a 1 volt ripple on the b+, and I think that might be the cause of the distortion. The filter consists of a pie filter of two 33uf caps and a 2.2kohm resistor.I have tried adjusting the volume of the input device and it doesnt help. There is no hum in the radio when its tuned to the transmitter(I have tried several of my radios).

6/27/2004 5:38:39 PMsean
:Hello, I dont know if it needs to be grounded or not. I am not quite sure what the small disk cap is there that attatches on lead to the line cord and the other to the ground side of the b+. I dont have a large cap to throw in, so I just figured on throwing in some more diodes thereby reducing the value needed for filter caps...diodes are real cheap too. Isnt a 1 volt ripple a little excessive?
:
:Hi Sean
:
: You can change a half wave rectifier to a full wave bridge as long as you don't need one lead of the transformer grounded. Both - & + come off of diode/cap junctions. Have you tried higher capacity for filters. One after the 2.2k resistor can be increased to almost any value without a problem, 100 mfd?
:
:Norm
:
::Hello, I am looking at my transmitter and it appears to only have a half wave rectifier diode in it. Transformer doesnt have a center tap. So I thought I would add the 3 remaining diodes it lacks and make the rectifier a full wave bridge. I dont think that will matter much. The attempt is being made because there is a 1 volt ripple on the b+, and I think that might be the cause of the distortion. The filter consists of a pie filter of two 33uf caps and a 2.2kohm resistor.I have tried adjusting the volume of the input device and it doesnt help. There is no hum in the radio when its tuned to the transmitter(I have tried several of my radios).
6/27/2004 8:42:00 PMsean
Hello, I got the bridge in with more caps, it seems the bridge made more ripple, dont understand that but I put a 47 uf along with a 10 uf and got the ripple down to 240mV. As far as the distortion, it didnt help that. Not sure what else I can do. Wish I hadnt bought it if I knew it was going to do that

::Hello, I dont know if it needs to be grounded or not. I am not quite sure what the small disk cap is there that attatches on lead to the line cord and the other to the ground side of the b+. I dont have a large cap to throw in, so I just figured on throwing in some more diodes thereby reducing the value needed for filter caps...diodes are real cheap too. Isnt a 1 volt ripple a little excessive?
::
::Hi Sean
::
:: You can change a half wave rectifier to a full wave bridge as long as you don't need one lead of the transformer grounded. Both - & + come off of diode/cap junctions. Have you tried higher capacity for filters. One after the 2.2k resistor can be increased to almost any value without a problem, 100 mfd?
::
::Norm
::
:::Hello, I am looking at my transmitter and it appears to only have a half wave rectifier diode in it. Transformer doesnt have a center tap. So I thought I would add the 3 remaining diodes it lacks and make the rectifier a full wave bridge. I dont think that will matter much. The attempt is being made because there is a 1 volt ripple on the b+, and I think that might be the cause of the distortion. The filter consists of a pie filter of two 33uf caps and a 2.2kohm resistor.I have tried adjusting the volume of the input device and it doesnt help. There is no hum in the radio when its tuned to the transmitter(I have tried several of my radios).

6/29/2004 7:00:10 PMDanny
:Hello, I got the bridge in with more caps, it seems the bridge made more ripple, dont understand that but I put a 47 uf along with a 10 uf and got the ripple down to 240mV. As far as the distortion, it didnt help that. Not sure what else I can do. Wish I hadnt bought it if I knew it was going to do that
:
:::Hello, I dont know if it needs to be grounded or not. I am not quite sure what the small disk cap is there that attatches on lead to the line cord and the other to the ground side of the b+. I dont have a large cap to throw in, so I just figured on throwing in some more diodes thereby reducing the value needed for filter caps...diodes are real cheap too. Isnt a 1 volt ripple a little excessive?
:::
:::Hi Sean
:::
::: You can change a half wave rectifier to a full wave bridge as long as you don't need one lead of the transformer grounded. Both - & + come off of diode/cap junctions. Have you tried higher capacity for filters. One after the 2.2k resistor can be increased to almost any value without a problem, 100 mfd?
:::
:::Norm
:::
::::Hello, I am looking at my transmitter and it appears to only have a half wave rectifier diode in it. Transformer doesnt have a center tap. So I thought I would add the 3 remaining diodes it lacks and make the rectifier a full wave bridge. I dont think that will matter much. The attempt is being made because there is a 1 volt ripple on the b+, and I think that might be the cause of the distortion. The filter consists of a pie filter of two 33uf caps and a 2.2kohm resistor.I have tried adjusting the volume of the input device and it doesnt help. There is no hum in the radio when its tuned to the transmitter(I have tried several of my radios).

Hi Sean
Do you have the diagram of your transmitter that you could send to me by email? May be I might help you. Bye
Danny

6/29/2004 7:07:54 PMDanny
:Hello, I got the bridge in with more caps, it seems the bridge made more ripple, dont understand that but I put a 47 uf along with a 10 uf and got the ripple down to 240mV. As far as the distortion, it didnt help that. Not sure what else I can do. Wish I hadnt bought it if I knew it was going to do that
:
:::Hello, I dont know if it needs to be grounded or not. I am not quite sure what the small disk cap is there that attatches on lead to the line cord and the other to the ground side of the b+. I dont have a large cap to throw in, so I just figured on throwing in some more diodes thereby reducing the value needed for filter caps...diodes are real cheap too. Isnt a 1 volt ripple a little excessive?
:::
:::Hi Sean
:::
::: You can change a half wave rectifier to a full wave bridge as long as you don't need one lead of the transformer grounded. Both - & + come off of diode/cap junctions. Have you tried higher capacity for filters. One after the 2.2k resistor can be increased to almost any value without a problem, 100 mfd?
:::
:::Norm
:::
::::Hello, I am looking at my transmitter and it appears to only have a half wave rectifier diode in it. Transformer doesnt have a center tap. So I thought I would add the 3 remaining diodes it lacks and make the rectifier a full wave bridge. I dont think that will matter much. The attempt is being made because there is a 1 volt ripple on the b+, and I think that might be the cause of the distortion. The filter consists of a pie filter of two 33uf caps and a 2.2kohm resistor.I have tried adjusting the volume of the input device and it doesnt help. There is no hum in the radio when its tuned to the transmitter(I have tried several of my radios).

Hi
Can you send me the schematic of your transmitter at my email? I could probably help you. Bye



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