[TMC] SLM-2 Sideband level Monitor

[Chris Bolkan]

Thank you Nick and John!

This is exactly what I needed. You guys and this group are amazing. I have
the SBE fully functional (not completely fine tuned up yet) and it is super
fun to feed an audio signal into the upper and lower sideband inputs and
look at the output on a spectrum analyzer! So fun to be able to turn up and
down each sideband individually and insert the carrier with the twist of a
knob! What cool equipment!

One weird thing that I need to chase out in the SBE is that the VOX level
knob affects the output level like a volume control. Haven't chased that
out yet, but it doesn't seem like it should have any effect on the signal
unless a mic is connected. Not asking for help with that yet. It's just an
interesting observation till I figure it out.

Best regards,

Chris


On Fri, Mar 18, 2022 at 8:15 AM Nick England <navy.radio at gmail.com> wrote:

> The SLM-2 schematic and other info are here
>
> https://www.tmchistory.org/tmc_manuals/manuals_db/gpt-10k/atm_gpt-10k_volII_partVII_3_1_62.pdf
>
> Helpful hint-
> Google this to search John’s site -
>   site:tmchistory.org SLM
>
> Even though John’s pdf manuals aren’t OCRed, Google does OCR on many of
> them.
>
> Nick K4NYW
>
>
>
>
> On Fri, Mar 18, 2022 at 10:30 AM Chris Bolkan <bolkyboats at gmail.com>
> wrote:
>
>> Hi TMC Lovers,
>>
>> I have an SLM-2 Sideband Level Monitor that mates with an SBE exciter in
>> some of the GPT-10K systems. At least that's the only place I have seen it
>> looking through John's TMC library. It has two meters and displays the
>> modulation level out of the 250Khz Balanced Modulators in the SBE.
>>
>> I have the SLM-2 connected to the SBE and working. What I am looking for
>> is
>> a manual that contains the schematic and any setup/calibration
>> information.
>> There is not a separate manual in the archives for the SLM-2. The best I
>> have found is reference to it in one of the system manuals, but there is
>> no
>> schematic or detailed information.
>>
>> Does anyone know of a dedicated manual for this device, or perhaps where
>> it
>> is more completely detailed in a higher level manual?
>>
>> Many thanks!
>>
>> Chris Bolkan
>> KI7NXY
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> --
> Nick England K4NYW
> www.navy-radio.com
>