LF: W/G SPM-33

[Dexter McIntyre W4DEX <dexter.mc@gmail.com>]

Gerhard Hickl wrote:
> I also own a W/G Selective Level Meter, it's the SPM-33 and it also
> produces a (false) signal at exactly 2000Hz. Seems to a specific problem
> of W/G equipment.
>
>   
Gerhard,

The 2000 Hz I was referring to is the center frequency beat note 
produced by an on frequency signal.  I find it a bit hard to copy CW at 
that frequency.  Actually 1000 Hz is my preferred tone.  I suspect that 
comes with my past telcom days of aligning analog channels with 1000 Hz :)
But I know the 2000 Hz note you speak of from the WG SLMs.  I do not 
have that problem with my antennas due to fairly high signal input 
levels.  When connected to a small antenna the internal on frequency 
signal will show up.  Normally I just offset the dial to move the 
desired signal note off of 2000 Hz.  If your SPM-33 is like the 16 or 19 
it has a tracking generator output from a connector in the rear.  I have 
the WG AR-160 level generator which uses the output to give a selectable 
level up to +12.99 dbm.  I found that when the tracking output of the 
SLM is terminated instead of connected to the level generator or just 
left open the internal signal is just barely detectable if there at 
all.  If your 33 has this tracking option connector try terminating it 
if you haven't already done so.
73,
Dex