tentec-request@contesting.com
20/4/2024 7:00 μ.μ.
ajamas.rn@gmail.com
Hi Bob,
Thanks for replying to my question. The front end seems to work ok in the bands
above 30m, with sensitivity similar to my other rigs, and without significant
variation from the low to the hi end of each band.
Initially I had supposed that the problem could be related to low and uneven
local oscillator injection level for the 80/40m bands, but after looking with
the scope at the output of the VFO amp, it seems to be fairly constant and
properly peaked across both bands.
For the same RF injection from the signal generator I get gradually much more
response towards 3.5 Mhz and 7.4Mhz compared to 4 and 7.0 Mhz respectively.
So the problem seems to be unequal preselector tracking within these 2 bands
and not lack of function of a front end stage, which would affect sensitivity
equally irrespective of Rx frequency.
On the other hand, I did find the 9Mhz trap trimmer completely off resonance
(see my 1st post), something that perhaps indicates improper alignment to the
preselector coils by the previous owner. I was just wondering if anyone had
attempted to adjust L1, which is the coil that according to the manual should
not be touched during alignment.
Eventually I may have to try and adjust L1 and see what happens to the above
problem, but without clear instructions I am afraid that I may find myself in
the "no man's land" afterwards.....Maybe recording any change I make to L1 I
could at least reverse any change, if the attempt proves unsuccessful.
73,
Marinos
________________________________
Από: TenTec <tentec-bounces+sv9dru=hotmail.com@contesting.com> εκ μέρους του
tentec-request@contesting.com <tentec-request@contesting.com>
Στάλθηκε: Σάββατο, 20 Απριλίου 2024 7:00 μμ
Προς: tentec@contesting.com <tentec@contesting.com>
Θέμα: TenTec Digest, Vol 254, Issue 8
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Today's Topics:
1. Re: 1. Omni-C 40m/80m alignment question (Marinos
Markomanolakis M.D.) (Bob D.)
2. Re: TenTec Digest, Vol 254, Issue 7 (Phil Florine)
----------------------------------------------------------------------
Message: 1
Date: Fri, 19 Apr 2024 12:35:27 -0400
From: "Bob D." <ajamas.rn@gmail.com>
To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] 1. Omni-C 40m/80m alignment question (Marinos
Markomanolakis M.D.)
Message-ID:
<CA+kZa5rt7cp8yDxqAEHefWxPjMsZQzOj1NSmCZVv9eO=LL46xA@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
Hi Marinos!
Suggest you fashion a small RF pribe and used another receiver to see if
it's a problem with the front end.
Message: 1
> Date: Wed, 17 Apr 2024 17:35:06 +0000
> From: Marinos Markomanolakis M.D.
>
> In my newly acquired 546 Rx sensitivity increases towards the higher end
> and seems to go down towards 7.0 Mhz.
> Also in the 80m band, sensitivity seems to be much more towards 3,5Mhz,
> gradually falling towards 4Mhz
>
> Going through alignment of the fron end and VFO mixers per the manual did
> not help to any significant degree.
> Suspecting that coil L1 (the one not supposed to be touched during front
> end alignment) may be somewhat off for the preselector to track, but I am
> hesitant to disturb it, especially since there are no instructions for its
> alignment in the manual.
>
> Any ideas or help would be great appreciated.
>
> Thanks, 73
> Marinos sv9dru / ki4gin
>
>
>
>
> ------------------------------
>
> Subject: Digest Footer
>
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> ------------------------------
>
> End of TenTec Digest, Vol 254, Issue 6
> **************************************
>
------------------------------
Message: 2
Date: Fri, 19 Apr 2024 14:59:13 -0500
From: Phil Florine <phil.florine@gmail.com>
To: tentec@contesting.com
Subject: Re: [TenTec] TenTec Digest, Vol 254, Issue 7
Message-ID:
<CAAB3AxAGGxJgDY6kc+_2MfYqQb6ouONEmTCyKJen9hRXESyLNA@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
I don't think TT used Molex connectors. They were Amp Mate n lok
On Fri, Apr 19, 2024 at 11:00?AM <tentec-request@contesting.com> wrote:
> Send TenTec mailing list submissions to
> tentec@contesting.com
>
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> http://lists.contesting.com/mailman/listinfo/tentec
> or, via email, send a message with subject or body 'help' to
> tentec-request@contesting.com
>
> You can reach the person managing the list at
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>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of TenTec digest..."
>
>
> Today's Topics:
>
> 1. Orion, PS, Filters, Mics and more FS (Ken, W8EK)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 19 Apr 2024 11:26:21 -0400
> From: "Ken, W8EK" <kenw8ek@gmail.com>
> To: TenTec List at contesting <tentec@contesting.com>
> Subject: [TenTec] Orion, PS, Filters, Mics and more FS
> Message-ID: <c8ce074f-b590-422e-abb8-4c9cb1058bf5@gmail.com>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
>
> TenTec Orion Transceiver, Power Supply, Filters,
> Microphones, and more For Sale:
>
> .
>
> TenTec Orion 565 HF Transceiver:
> -
> Features:
> .
> Full dual receive capability
> .
> Bandwidth, AGC, PBT, Hi-Lo Cut, AF and
> RF Gain, attenuator, DSP NR and notch
> filtering independent on each receiver
> .
> ORION?s main receiver performance is
> unmatched by any other HF transceiver.
> .
> 590 receive IF-DSP bandwidth filters
> (100?6000 Hz, 10 Hz steps)
> .
> Up to six crystal filters in the main receiver
> .
> The sub receiver has 590 filters independent
> of the main receiver filtering
> .
> Continuous real-time spectrum display
> .
> Rated 100% duty cycle, 100 watts output
> .
> Nine adaptive DSP noise reduction filters
> .
> Dual noise blankers
> .
> Voice keyer and CW memory keyer built-in
> -
> This one looks very close to new, and works the same.
> No defects. Pristine!
> Includes heat sink fan, power cord, paper work, in
> original box for $1000.
>
> .
>
> TenTec 252 Power Supply:
>
> The TenTec 252 is an older linear power
> supply, often used with the Triton series
> of HF rigs. It produces 13 V DC at up to
> 20 amps, making it suitable for most HF
> transceivers.
>
> It has a Molex 4 pin connector for output, as
> well as RCA phono connectors.
> It works 100% as it should.
>
> It is a 252 M, which means it came
> from the TenTec factory with a lighted
> ammeter on it. It is a silver gray color
> that matches the Triton IV or Triton 540 or
> 544.
>
> It looks extremely nice. Buy it with
> paper work for $100
>
> .
>
> I have a variety of TenTec filters available.
> All of them work as they should and also look
> fine, as if that matters for an internal filter.
> .
>
> This filter is used in TenTec rigs
> in the 9 MHz IF. This includes the Orion I,
> as well as Omni series A, B, and C; Omni V,
> Omni VI, Argosy, Paragon, and maybe others.
>
> While it will fit the original Orion,
> it does not fit the Orion II.
>
> InRad 762 premium filter
> 600 Hz wide, CW, $125
>
> .
>
> This one is for use in the 6.3 MHz IF in rigs such
> as the Paragon, Corsair I and II, Delta, Omni V
> VI 6+, and others.
> -
> TenTec 288 filter
> 1800 Hz wide, for narrow SSB or wide CW, $79
>
> .
>
> TenTec Collins Mechanical Filters
>
> These filters are used in the 455 KHz IF.
> Being they are Collins mechanical filters,
> they have extremely steep skirts for superior
> selectivity. I know for sure they are used
> in the Omni VII, and think maybe in the
> Eagle and maybe in other rigs, including
> some Yaesu rigs.
>
> .
>
> TenTec Model 2031
> Collins number 526-8693-010
> 500 Hertz CW Filter $200
>
> TenTec Model 2032
> Collins number 526-8733-010
> 300 Hertz narrow CW filter $200
>
> .
>
> TenTec Hand Microphone:
>
> This mic is similar to the TenTec model
> 700, although I do not find that number
> on it. It is black plastic case, with
> PTT switch. It is an electret mic, with
> great frequency response, and a 4 pin
> mic plug. $30
>
> .
>
> XLR Cables
>
> All of these cables have a very nice rubber
> covered cord, with a 3 pin female XLR
> connector on one end.
>
> About 8 feet long, with male 3 pin XLR
> connector on other end (extension
> cable) $28
>
> 20 feet long, extension cable (as above),
> still in package, new. $35
>
> About 25 feet long, extension cable (as
> above), $35
>
> About 8 feet long, with 1/4 inch mono plug
> on the other end. $25
>
> About 8 feet long, with nothing on the
> other end. $20
>
> .
> XLR Microphone Gender Changers For Sale:
>
> Male to Male gender changer
> Male 3 pin XLR connector on both ends to
> change gender. Works and looks like new. $10
>
> Female to Female gender changer
> Female 3 pin XLR connector on both ends to
> change gender. Works and looks like new. $10
>
> Female 3 pin XLR to 1/4 inch plug. $10
>
> .
>
> I also have many other accessories available
> such as many different types of microphones,
> HTs, VHF and UHF rigs, HF and VHF/UHF antennas,
> connectors, miscellaneous accessories, etc.
> Just too many to list here.
> Please e-mail your requests.
>
> .
>
> Prices do not include shipping from Florida.
>
> Thanks.
>
> 73,
>
> Ken, W8EK
>
> Ken Simpson
> E-mail to W8EK@FLHam.net or W8EK@arrl.net
> Voice Phone (352) 732-8400
>
>
>
> .
>
>
>
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>
> Subject: Digest Footer
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>
>
> ------------------------------
>
> End of TenTec Digest, Vol 254, Issue 7
> **************************************
>
------------------------------
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