[1000mp] Interface/Buffer for sound card.

[Dean Fewkes]

Jim,

When I connect the AF Line Out from the Mark V (Rx audio) to the AF Line 
In on the sound card, I get a heavy AC hum in the audio on the sound 
card. I am using a patch cord with a stereo plug at both ends.  I have 
not gotten as far as connecting the sound card back to the Patch in on 
the Radio.

I am thinking that the 1 to 1 transformer may do the job (thank you to 
Rod for the RS part number). I do not know the make of my sound card but 
it came with my HP Pavilion a350n desktop computer.

Thanks to everybody for your help!

Dean Fewkes
KG7MZ



Jim Smith wrote:

> Dean,
>
> Can you describe in more detail what you mean by, "...bad AC feedback 
> loop"?  For example, are you feeding the Rx audio into the sound card 
> and feeding the sound card line out into the patch input on the MkV?
>
> Jim Smith   VE7FO
>
> Dean Fewkes wrote:
>
>> I would like to use my computer's sound card for voice recording, in 
>> and out, and other processing. When I patch my radio into the sound 
>> card I get a bad AC feedback loop. Can somebody recommend some plans 
>> for building an isolator? Will any 1 to 1 transformer work? Are there 
>> any basic commercial units that will do this?
>>
>> Thanks for your help!
>>
>> I have a Mark IV Field.
>>
>> Dean Fewkes
>> KG7MZ
>> Kalama, WA
>
>
>