[TenTec] TenTec Paragon II model 586,

[Barry N1EU]

Maybe my math is wrong, but I figure a passband of 100 Hz to 2900 Hz
with the 2.8 KHz filter with its center frequency of 9001.5 KHz.

Yes, the carrier suppression/null alignment should be carefully
performed after installing the new filter, but it's not a difficult
procedure.  I would follow that with on-air tests to verify inaudible
carrier levels.

73, Barry N1EU

On Mon, Sep 30, 2013 at 4:37 PM, Bob McGraw - K4TAX <RMcGraw at blomand.net> wrote:
> The carrier oscillators are not centered in the filter but  are typically at
> the edge or somewhat down the slope of the filter edge.  And usually down
> the slope some 3 dB to 6 dB with the oscillators being switched in frequency
> to the upper edge or lower edge of the filter depending on mode.
>
> In the case of the Omni VI Plus the oscillators switch to produce LSB and
> USB signals with oscillator frequency being 9.000000 MHz for LSB and
> 9.003000 for USB and CW transmit/Tune being 9.000400 MHz.  Thus the filters
> are some 600 Hz down the slope of the filter.
>
> With the Paragon the oscillator frequencies are 9.000000 for USB and
> 9.003000 MHz for LSB and RTTY and 9.000700 MHz for CW/Tune mode.
>
> I don't see much if anything to be gained by changing the transmit bandwidth
> from 2.4 KHz to 2.8 KHz.  Thus the audio frequency response would be about
> 300 Hz to 2700 Hz with the 2.4 KHz filter and 300 Hz to 3100 Hz with the 2.8
> KHz filter.
>
> Another factor to be considered is the carrier suppression as the carrier is
> positioned on the slope of the filter.  If the filter response is not
> correct, the shape factor not correct and the slope of the filter not
> correct, be assured that carrier suppression will likely suffer as the
> filter does contribute to overall carrier suppression.
>
> My take on changing filters..........nice science project.
>
> 73
> Bob, K4TAX
>
>
>
>
>
>
> ----- Original Message ----- From: "Mike Bryce" <prosolar at sssnet.com>
> To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
> Sent: Monday, September 30, 2013 10:32 AM
> Subject: Re: [TenTec] TenTec Paragon II model 586,
>
>
>
>> bill,
>>
>> the same filter is used for BOTH transmit and receive.
>>
>> I have not put one in, but it's  a simple matter of un-plugging the old
>> one and pushing the new in its place.
>>
>> most of the time that's all you need to do, but sometimes you need to
>> touch the carrier oscillators to make sure they're are centered in the
>> filter.
>>
>> remember, at 2.8khz, you'll won't be a popular fellow on a crowded band
>>
>>
>> Mike, WB8VGE
>> SunLight Energy Systems
>> The Heathkit Shop
>> http://www.theheathkitshop.com/
>> J e e p
>> o|||||||o
>>
>> A man with one clock knows what time it is. A man with two clocks is never
>> sure.
>>
>>
>>
>> On Sep 30, 2013, at 10:12 AM, Basilie Actipis wrote:
>>
>>> Has anybody out there have put the inrad 2.8khz SSB filter in their
>>> paragon
>>> for TX????????
>>> Where is the TX SSB filter is located??????
>>> I know I can use the 6khx AM filter for RX,but I will also install one
>>> for
>>> RX.
>>> Thank you in advance for the help.Bill / N1ASS.73..............
>>>
>>> I am re-posting  so others have returned from the TT hamfest can read and
>>> see if anybody has a answer. Thank you.
>>> --
>>> *73........Bill / N1ASS.*
>>> _______________________________________________
>>> TenTec mailing list
>>> TenTec at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/tentec
>>>
>>
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>
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