[TMC] TMC SBE-6

[Duncan M. Brown]

Bob, 

The Antique Wireless Museum also has a SBE-6, part of a SBT-1KV.  It is
very similar to the SBE-9, but not exactly what is in the SBE-9 manual.
Possibly an early version of the SBE-9 that was never documented??? 
Download the SBE 9 manual from K4OZY, it will get you started.

Here is part of the query I put out a while ago when I was working on our
unit; it details some of the differences:

********
My question is that our SBE exciter is stamped with a model number "6". I
have been told that there is no such thing as a SBE-6 and I was beginning
to think that maybe whoever stamped the model number on the unit just got
his stamp upside-down and it really is a SBE-9. It does have the same SB
filters (FX-158 & FX-160) as a SBE-9 and looks like a SBE-9 (according to
manual IN-2008A). But as I have been getting more intimate with the unit, I
have noticed some differences from the manual:

1. This unit has no V128 (USB/LSB meter preamp). Under our chassis there
are a couple of power resistors where V128 is in the manual.
 
2. In the manual alignment instructions (p5-10) & schematic, there are
listed 14 trimmer capacitors for the eight HF mixer crystals selected by
the "BAND, MCS" switch. This chassis has 8 trimmer capacitors located next
to the 8 HF crystals and the silkscreened reference designators do not
agree with the manual (though they are in the same number range).
 
3. On the back of the chassis there are two BNC connectors marked "USB OUT"
& "LSB OUT". These are shown in the manual rear panel picture of Fig 2-5,
but there is no other mention of them in the manual instructions, parts
list or schematic.
 
4. The manual says to adjust a variable capacitor (and it is shown on the
schematic) on balanced modulator Z-107, but there is no (accessable)
variable capacitor on Z-107 of this unit (just a variable resistor).
 
I've notice many errors in the the manual, so possibly these are just
changes that weren't covered/corrected in the manual. Or maybe I have SBE-9
that is earlier or later than the manual. The serial number on the "SBE-6"
plate is 17582. The FX-158 LSB filter has a date code of "May 26 '64" and
the FX-159 carrier notch filter has a date code of "Aug 5 '64". This is the
only SBE that I have seen, so I don't have anything to judge by. Can anyone
tell me if these are normal variations for production SBE-9s, or do I have
an oddball unit??
******************************************
I never recieved a reply from anyone who knew anything about the SBE-6. 
Glad to know that there are others out there. 

John, K4OZY, received a large lot of TMC documentation, but he has seen
nothing on the SBE-6 in that lot. (He is scanning the information to put up
on his site and then the documentation will be archived by the AWA Museum.)
 
I had some intermittant switch contacts in the oven (don't think I got all
bands working) and intermittant grounds on some coils, but eventually got
it working.


Good Luck & 73,
 
Duncan Brown, K2OEQ
AWA Electronic Communication Museum
http://www.antiquewireless.org/
 



> [Original Message]
> From: Bob Sullivan <robert at isquare.com>
> To: <tmc at mailman.qth.net>
> Date: 24-Jul-10 18:13:48
> Subject: [TMC] TMC SBE-6
>
> Listmates,
>
> Does anyone have information on the SBE-6 exciter? 
>
> I'm looking for a manual. I did check with John, K4OZY, who,
unfortunately, does not have this version of the SBE exciter in his large
database of manuals.
>
> 73, Bob
> WØYVA
> http://www.isquare.com/personal_pages/ras-hardware.htm
>