[TMC] Sideband Exciters
Richard Knoppow
1oldlens1 at ix.netcom.com
Fri Aug 27 20:14:27 EDT 2021
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On 8/27/2021 2:23 PM, W2HX wrote:
> I had made a little spreadsheet of some differences I found in the manuals a few years ago. Hope the file makes it through.
>
> Sent from Nine<http://www.9folders.com/>
>
> ________________________________
> From: BERMAN <triodes at optonline.net>
> Sent: Friday, August 27, 2021 2:52 PM
> To: Meir Ben-Dror WF2U; Nick England
> Cc: George W1LSB via TMC
> Subject: Re: [TMC] Sideband Exciters
>
> Meir, thanks for the input on the SBE-series of exciters.
>
> I have a model SBE-2A (not SBE-2) exciter integrated within my GPT-750. Do you (or anyone else here) know how the SBE-2A differs from the SBE-2 or the later SBE-3?
>
> I ask this as I was unaware that the SBE-3 and later variants were less of "a pain in the neck" when compared to those units that were of the earlier pre-SBE-3 design.
>
> 73,
>
> Bruce, W2XR
>
>> On August 27, 2021 at 2:18 PM Meir Ben-Dror WF2U <wf2u at ws19ops.com mailto:wf2u at ws19ops.com > wrote:
>>
>>
>> Chris,
>>
>> Nick is correct of course, but as TMC master oscillators are concerned, besides the VOX series, you can also use a PMO if you need only one output. Another advice: the older SBE-2 is a pain in the neck, but the SBE-3 (and up) is much better and if needs to be, easier to align.
>> Here is my multi-mode 350 W TMC system I put together; I had enough space in the rack to mount the GPR-90RXD receiver in it as well, and a homebrew dual speaker panel, for single rack integrated station. I have a PMO in there, because the VOX I have needs some work, but I'll keep the PMO in the system.
>>
>> 73, Meir WF2U
>> Landrum, SC
>>
>> Get BlueMail for Android
>>
>> On Aug 27, 2021, 1:59 PM, at 1:59 PM, Nick England <navy.radio at gmail.com mailto:navy.radio at gmail.com > wrote:
>> >Yes you also need a variable master oscillator like the TMC VOX
>> >(O-330).
>> >Otherwise the SBE can run crystal-controlled and has a switch for
>> >multiple
>> >crystals. For many government and commercial applications, crystal
>> >control
>> >was fine.
>> >Hey, it’s TMC.
>> >
>> >
>> >On Fri, Aug 27, 2021 at 1:31 PM Chris Bolkan <bolkyboats at gmail.com mailto:bolkyboats at gmail.com >
>> >wrote:
>> >
>> >> Hi TMC lovers!
>> >>
>> >> I have been looking at a few TMC transmitters on the history site and
>> >> am confused about something. It seems that most of the systems have a
>> >> master oscillator (0-330 or something like that) in addition to the
>> >> SBE exciter (SBE-3 or 3 or whatever)
>> >> I am hoping to assemble a complete working transmitter at some point
>> >> if it ever becomes possible to obtain the components, but at this
>> >time
>> >> I know precious little about what is actually required to assemble a
>> >> working transmitter. I thought based on reading and images of the
>> >> controls on the SBE's that they contain the required oscillators and
>> >> are self contained. My question is do they? Or is the 0-330 master
>> >> oscillator required in addition to the SBE to have a fully
>> >functioning
>> >> exciter, or is the "master" oscillator an "extra" that allows
>> >> synchronization of multiple transmitters and receivers and so forth?
>> >I
>> >> apologise if this is an ignorant question. I suppose I could
>> >> eventually figure it out if I read enough on the history site, but
>> >> it's not always easy to figure everything out looking at just manuals
>> >> without an understanding of the original deployment and (intended
>> >use)
>> >> for these devices.
>> >>
>> >> Thanks in advance!
>> >>
>> >> Best regards,
>> >> Chris
>> >> KI7NXY
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>> >--
>> >Nick England K4NYW
>> >www.navy-radio.com<http://www.navy-radio.com>
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--
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL
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