[Kenwood] Kenwood SM-220 Station Monitor

[Garey Barrell]

Conrad -

The BS-8 Pan Display is an interesting toy, but is of limited use.  It
essentially displays signals as vertical lines along a baseline of
frequency.

The "specific" graticule is just a single horizontal baseline with a
single vertical line in the center, and isn't really necessary.   The
baseline represents either a 20 kHz or a 100 kHz range that is centered
on the frequency the receiver is tuned to, e.g., a signal that the
receiver is tuned to show as a "pip" in the center of the line.  Each
signal within that frequency range is displayed along the baseline, with
taller vertical lines equaling stronger signals.

The sweep speed must be kept very low to prevent IF filter delay from
"stretching" the vertical lines into inverted "V's".

 From a practical standpoint, unless you want to monitor 20 or 100 kHz
of a "dead" band, watching for a "pip" indicating a signal, (10M or
VHF/UHF,) the BS-8 really doesn't offer much.  You could also watch for
"clumps" of signals indicating a pile-up, but it's more effective to
just tune around!

73, Garey - K4OAH
Atlanta

Drake C-Line Service Manual
<http://hr99.home.mindspring.com/R-4C_Servicez/>



Conrad & Kathi Nasatka wrote:

>Good day to all Kenwood aficionados:
>I am trying to find or get in touch with someone that has a Kenwood SM-220 station monitor with the BS-8 display option.  I presently have one without the BS-8 Pan Display Option.  However, I would like to speak to someone who has one and uses all the functions that the SM-220 has.  For Instance, there are 3 connection cables necessary to make them functioning according to the manual.  There is a specific graticule necessary when you put the BS-8 option into operation.  I have tried to locate one on eBay but just missed one that had everything.  If I could speak to someone that weigh in on the specific benefits I would be most appreciative.  As I said I own one and did so specifically to monitor my signal when I had the Kenwood TL-922A in line to provide me with some idea of linearity.  I would appreciate it very much because I am missing something, sorry!
>Regards
>73
>Conrad
>WB3DQD
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