[Boatanchors] Meissner Signal Shifter

[Rodger]

Hi Barrie,

First, congratulations on finding an EX with the 160 meter coil 
strip-they are not that common.

The EX is an interesting setup with a pair of 5Y3 rectifiers in 
parallel.  I would first check the voltage at the output of the choke to 
see if it is normal; bad filter caps will result in low voltage.  Next 
check the screen voltage at the 807; I had to replace the screen 
dropping resistor in mine which had drifted up in value.

It could just be an alignment issue but I would do the basic voltage 
checks before I started an alignment.

Rodger WQ9E

Barrie Smith wrote:
> Good afternoon:
>
> I recently aquired two MSS in reasonably good condition.  One is the older style, with plug-in coils (got all the ham-band coils, including 160M!).
>
> The older one seems to work quite well, and doesn't appear to drift very much at all.
>
> The newer version, the "EX", with the coil turret, has low output on 160M, lower output on 80 and 40M, and no output on 10M.
>
> I've tested and replaced all tubes, to no avail.  I cleaned the contacts on the turret, which may have helped a bit, but I still have low-output.
>
> The older untit will light a 25 watt light bulb (I know, the lightbulb thing again.  However, I don't know how else to measure the output.  And, I think the lightbulb is a good relative output device) a quite bright white.
>
> The newer unit will light the same bulb to a fairly bright red on 160M, with progressively less output as the frequency goes up.
>
> Are there any known issues with these devices?  Any place to look first?
>
> Any help appreciated!
>
> 73, Barrie, W7ALW
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