[TMC] Sideband Exciters

[Chris Bolkan]

That is an awesome build Meir! Very clever and neat looking implementation!

My goal is also to ultimately build a complete basic TMC station. To
that end I have GPR and PAL but no SBE or Master oscillator which is
why I am trying to figure this out. I have to know what I am looking
for so if/when it becomes available I know what I need :-)  By the
way, thanks for the tip on the SBE models.

Now I understand that the SBE will run self contained on crystals, but
to variable tune it will require a VOX of some kind. I have not looked
at the PMO's so will do that to become a bit familiar with them too.
For my use I cannot imagine requiring multiple outputs that you say
the 0-330 does, but it is a Nice looking piece!.

I wish there was more information and examples on how this TMC
equipment was actually deployed and used. It would be a godsend to
understanding all of the individual components they produced. One
thing is certain. They were prolific designers and created some
beautiful equipment!

Chris

On Fri, Aug 27, 2021 at 11:18 AM Meir Ben-Dror WF2U <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, at 1:59 PM, Nick England <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> 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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