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| headphone click http://www.interceptradio.com/bbs/viewtopic.php?f=1&t=8434 |
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| Author: | gregz [ Tue Mar 29, 2016 5:45 am ] |
| Post subject: | headphone click |
I got a scanner headphone out plugged into a computer line in. The scanner sends a huge DC pop at the beginning of every transmission down the headphone line. Anyone find or build a DC in line block? Or I could fix it in software if I could run the the audio through a (free?) compressor/gate/delay. Anyone know if such a software? thanx |
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| Author: | FlashP [ Tue Mar 29, 2016 6:35 am ] |
| Post subject: | Re: headphone click |
Radio Shack used to sell isolators with RCA jacks, as well as bare 600 Ohm transformers. |
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| Author: | nickcarr [ Tue Mar 29, 2016 10:41 am ] |
| Post subject: | Re: headphone click |
It probably won't do this on the MIC input... |
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| Author: | nickcarr [ Tue Mar 29, 2016 10:45 am ] |
| Post subject: | Re: headphone click |
FlashP wrote: Radio Shack used to sell isolators with RCA jacks, as well as bare 600 Ohm transformers. http://www.amazon.com/gp/product/B01939 ... _g107_i2_r This might work... it's just an in-line audio isolation transformer. |
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| Author: | Atomic Taco [ Wed Mar 30, 2016 12:33 pm ] |
| Post subject: | Re: headphone click |
nickcarr wrote: FlashP wrote: Radio Shack used to sell isolators with RCA jacks, as well as bare 600 Ohm transformers. http://www.amazon.com/gp/product/B01939 ... _g107_i2_r This might work... it's just an in-line audio isolation transformer. |
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| Author: | nickcarr [ Wed Mar 30, 2016 2:04 pm ] |
| Post subject: | Re: headphone click |
Yep it's very possible... most high-end audio isolation units have various amplifier and attenuator features as well... |
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| Author: | Rich [ Wed Mar 30, 2016 7:04 pm ] |
| Post subject: | Re: headphone click |
Match the impedances and the loss is negligible. A Ratshack 273-1380 (8 ohm to 1000 ohm) transformer will do. Mic input is often >1000 ohms however its close enough to work. Been there/done that many times... I've also used a 600 ohm - 600 ohm transformer with good results. |
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| Author: | gregz [ Sun Apr 03, 2016 1:07 pm ] |
| Post subject: | Re: headphone click |
that fixed it! thanx. isolating transformer fixed it right up. |
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