An additional comment here...I ended up having noise coming from my CD
drive inputs. I needed to mute these to get quiet signals.
73 es God Bless de KK1L...Ron Rossi (kk1l@arrl.net) <><
QTH: Jericho, Vermont
My page: http://www.comcast.net/~kk1l
Pete Smith wrote:
> For recording, I suggest Audacity, a free application that is very good for
> trimming audio files to precise length. It also has the capability of
> setting audio files to a consistent peak level, without clipping. It makes
> it easy to get good-sounding, consistent messages.
>
> Setting the level to your radio is a little trickier, because it depends on
> whether you must feed the sound card's audio to a microphone input or can
> put it into a line-level jack on the back panel. For the former, you need
> a voltage divider; for either, you may need isolation transformers to help
> eliminate hum. Either way, you need to set the playback level of your
> sound card so as to have it as close as possible to the level from your
> normal voice. With my simple interface and a duplex capable sound card, I
> feed my microphone through the sound card. That way I can set the sound
> card's microphone gain to match the recorded files, and then control both
> levels to the transceiver simultaneously with the line out level control.
>
> Hum can be difficult, particularly with feeding audio to the microphone
> jack - I found that I needed both isolation transformers and VERY good
> connections between the computer and transceiver chassis.
>
> 73, Pete N4ZR
>
> At 02:04 PM 5/7/2007, Fred Jensen wrote:
>> Mirko S57AD wrote:
>>> Actually, there are 4 ways:
>>>
>>> * Soundblaster card & SBDVP TSR prog,
>>> * DVP by K1EA
>>> * W9XT card
>>> * External DVK
>>>
>>> I tried first two successfully. but had some issues (by cockpit error)
>>> with external DVK.
>>>
>> I tried the first also. Getting SBDVP to run right was frustrating, but
>> I finally managed. My logging confuser is the very old 486-33 our
>> youngest son used in college about a dozen years ago, and I had to set
>> up a RAM disk for the .wav files to get it all to work. Off the hard
>> drive, the audio played erratically.
>>
>> The two major problems were:
>>
>> 1. Getting acceptable .wav files recorded. Getting rid of background
>> noise, getting enough bass into it, and keeping extraneous hum out.
>>
>> 2. Getting the audio into the radio without hum and at the proper level.
>>
>> I finally gave up, and since I generally operate only CW and some RTTY,
>> it's OK. Incidentally, an informal survey of DVK quality during last
>> year's SSB Sweepstakes seems to have indicated that 9 out of 7 DVK's are
>> essentially unintelligible :-)
>>
>> Fred K6DGW
>> - Northern California Contest Club
>> - CU in the 2007 CQP Oct 6-7
>> - www.cqp.org
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