[TenTec] Omni vi plus input audio feed for psk

Sun May 29 23:25:55 EDT 2005

Me too!
----- Original Message ----- 
From: "Steve Baron - KB3MM" <SteveBaron at StarLinX.com>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Sunday, May 29, 2005 4:20 PM
Subject: Re: [TenTec] Omni vi plus input audio feed for psk


> I'd like to read it.
>
> ----- Original Message ----- 
> From: "Robert & Linda McGraw K4TAX" <RMcGraw at Blomand.Net>
> To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
> Sent: Monday, May 30, 2005 02:42
> Subject: Re: [TenTec] Omni vi plus input audio feed for psk
>
>
>> Ground loop city.  That's the cause of your ills and hum.  Not a uncommon
>> issue with most ham station wiring and grounding.  I don't consider it
> luck.
>> It is simply proper planning and correct grounding techniques applied
>>
>> This says your station ground and AC mains ground are not bonded together
>> thus a difference in potential exists as you discovered.  A great
> invitation
>> for lightning damage from a nearby strike.  The RS transformer simply
> breaks
>> the ground loop but does nothing to provide proper grounding.
>>
>> If you wish, I'll send you a paper on Lightning Protection for the Home
> and
>> the Station.  Many ham stations are dangerously grounded.  A separate
> E-Mail
>> request will get you the Microsoft Word document.  It's about 128K in
> size.
>>
>> 73
>> Bob, K4TAX
>>
>>
>> ----- Original Message ----- 
>> From: "joel hallas" <jrhallas at optonline.net>
>> To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
>> Sent: Sunday, May 29, 2005 6:35 AM
>> Subject: Re: [TenTec] Omni vi plus input audio feed for psk
>>
>>
>> > 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 at oregontrail.net>
>> >>To: "Discussion of Ten-Tec Equipment" <tentec at 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 at adelphia.net>
>> >>>To: "Discussion of Ten-Tec Equipment" <tentec at 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 at adelphia.net>
>> >>>>>To: "Discussion of Ten-Tec Equipment" <tentec at 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
>> >>>>>>>
>> >>>>>>>
>> >>>>>>>_______________________________________________
>> >>>>>>>TenTec mailing list
>> >>>>>>>TenTec at contesting.com
>> >>>>>>>http://lists.contesting.com/mailman/listinfo/tentec
>> >>>>>>>
>> >>>>>>>
>> >>>>>>>
>> >>>>>>_______________________________________________
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>> >>>>>>
>> >>>>>>
>> >>>>>>
>> >>>>>>
>> >>>>>
>> >>>>>_______________________________________________
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>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>_______________________________________________
>> >>>>TenTec mailing list
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>> >>>>
>> >>>>
>> >>>>
>> >>>>
>> >>>_______________________________________________
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>> >>>
>> >>>
>> >>>
>> >>
>> >>
>> >>_______________________________________________
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>> >>
>> >>
>> >>
>> >
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>>
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>
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