Bob,
You may be very lucky! With my Paragon (line out) to sound card input I
had a very loud hum on SSB xmit (I know that's the other side <g>), even
when the computer was off.
In my station, I have separate power feeds for radio equipment and other
stuff and it appears that there was a sufficient difference in "green
wire" ground voltage to cause a hum.
By putting a RS isolation transformer in that lead it took care of the
problem, for $1.75, I think. BTW, the transmit side was isolated in the
Rigblaster, or likely would have had the same problem.
Regards, Joel, W1ZR
Robert & Linda McGraw K4TAX wrote:
>Denton:
>
>First, the transformer may be "ringing" with square wave signals as a result
>of the transformer secondary not being correctly loaded.
>
>At my station, I connect direct from the sound card line IN/OUT to the Audio
>In / Audio Out of the Omni VI+. No problem in adjusting levels with the
>Mixer settings of the sound card and the MIC gain on the Omni VI+ runs about
>9 o'clock which is normal. I use VOX to do the switching and get great
>reports at about 35 to 45 watts output.
>
>I find that most folks "over engineer" the project.
>
>73
>Bob, K4TAX
>
>----- Original Message -----
>From: "denton" <denton@oregontrail.net>
>To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
>Sent: Saturday, May 28, 2005 6:36 PM
>Subject: [TenTec] Omni vi plus input audio feed for psk
>
>
>
>
>>I am currently using my omni vi plus for psk, with the output of the
>>soundcard going to an audio transformer to give me a good match to the
>>audio
>>input jack in the back of my Omni....on the air reports indicated good imd
>>at 40 watts out of the rig at -31, but sometimes I get a ringing report
>>and
>>indication of minor sidebars.
>>What I want to do is bypass the mic audio amp to give me much better
>>linearity for the various soundcard modes.
>>>From examining the schematic and its adjoining criteria, it seems that I
>>
>>
>>>can
>>>
>>>
>>feed the audio out from the soundcard directly to the input of the
>>balanced
>>modulator, with appropriate filtering and limit the output of the rig to
>>about 35 watts or so.
>>Any thoughts on this?? thanks...
>>----- Original Message -----
>>From: "John L Merrill" <jmerrill1@adelphia.net>
>>To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
>>Sent: Saturday, May 28, 2005 4:03 PM
>>Subject: Re: [TenTec] SSB recieve audio?
>>
>>
>>
>>
>>>I have a MkV Field and an FT1000D and with internal or external speaker
>>>they sound better to my inner or outer ears than my on the chopping
>>>block Orion with external and internal speaker. The OmniVI+ with the
>>>audio mod in it sounds better than an Orion.
>>>
>>>John N1JM
>>>
>>>denton wrote:
>>>
>>>
>>>>Wonder how the Orion's SSB audio sounds compared to an Omni VI??
>>>>For some reason, to my ears, my FT990 seems to sound better than my Omni
>>>>VI
>>>>on ssb.
>>>>----- Original Message -----
>>>>From: "John L Merrill" <jmerrill1@adelphia.net>
>>>>To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
>>>>Sent: Saturday, May 28, 2005 2:51 PM
>>>>Subject: Re: [TenTec] Propm RX
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>I have an R4A I've been repairing here on the bench and with the same
>>>>>speaker, it sounds better than the Orion :-).
>>>>>
>>>>>John N1JM
>>>>>
>>>>>Grant Youngman wrote:
>>>>>
>>>>>
>>>>>
>>>>>>>I agree. The receive audio is lousey on the Orion.
>>>>>>>
>>>>>>>
>>>>>>Maybe you just need a decent speaker. Or perhaps your inner ear needs
>>>>>>some
>>>>>>work :-)
>>>>>>
>>>>>>The Orion has excellent SSB receive audio, as good or better than any
>>>>>>HF
>>>>>>rig
>>>>>>I've used (many, new and old), and generally requires little in the way
>>>>>>of
>>>>>>receive EQ. I do much prefer it with a little more than the usual
>>>>>>bandwidth
>>>>>>(say around 3 Khz or so), but that's no different than most radios
>>>>>>which
>>>>>>sound like cr*p at the typical narrow bandwidths everyone want to use.
>>>>>>
>>>>>>Of course, it would benefit greatly from a pair of P-P 6V6's in the
>>>>>>output
>>>>>>stage, but I doubt that's in the plan :-)
>>>>>>
>>>>>>Grant/NQ5T
>>>>>>
>>>>>>
>>>>>>_______________________________________________
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>>>>>>TenTec@contesting.com
>>>>>>http://lists.contesting.com/mailman/listinfo/tentec
>>>>>>
>>>>>>
>>>>>>
>>>>>_______________________________________________
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>>>>>
>>>>>
>>>>>
>>>>>
>>>>
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>>>>
>>>>
>>>>
>>>_______________________________________________
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>>>
>>>
>>>
>>>
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>>
>>
>>
>
>
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