[TMC] Sideband Exciters

[BERMAN]

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
> 
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>     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
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