[Kenwood] Re: TS-450S Options

[parkjv1 at comcast.net]

One ohter question.

I have a like new Heathkit SA-2040 antenna tuner.  Will this work with the Kenwood TS-450S?

Sorry if these are dumb questions but I haven't been on the air since I was lincensed in 2000.

So, using equipment, etc. has not been and everyday thing for me.

73,

John KD7KFT


-------------- Original message -------------- 
From: Bryan Swadener <bswadener at yahoo.com> 

> > Date: Tue, 22 Apr 2008 19:44:12 -0700 
> > From: "John Parker" 
> > Subject: [Kenwood] TS-450S Options 
> > To: 
> > Message-ID: <002a01c8a4eb$eab6d6a0$f84a164c at homeoem> 
> > Content-Type: text/plain; charset="us-ascii" 
> > 
> > I really don't know that much about kenwoods so I have 
> > some more questions. 
> > 
> > Can someone shed some light on what these are used for. 
> > 
> > 
> > SO-2 High stability temperature compensated crystal 
> > oscillator. 
> > TU-8 CTCSS Encoder unit. 
> > YG-455C1 CW Filter 500 Hz [455 kHz IF] 
> > YG-455CN1 CW Filter 250 Hz [455 kHz IF] 
> > YK-88C1 CW Filter 500 Hz [8.83 MHz IF] 
> > YK-88CN1 CW Filter 270 Hz [8.83 MHz IF] 
> > YK-88S1 SSB Filter 2.4 kHz [8.83 MHz IF] 
> > YK-88SN1 SSB Filter 1.8 kHz [8.83 MHz IF] 
> > 
> > 73, 
> > 
> > John KD7KFT 
> > 
> 
> Hi John, 
> 
> 1. Modern rigs since the mid-early 80s use some form of frequency generation 
> based on a quartz crystal reference oscillator, instead of a free-running L-C 
> oscillator. The advantage is better stability (less frequency drift over time 
> and/or temperature). Since quartz is temperature sensitive, maintaining it in a 
> temperature-controlled "oven" improves stability. That is what this device 
> does. 
> 
> 2. This item is an acronym for Continuous Tone Coded Squelch System, sometimes 
> referred to as a "subaudible" or "subtone" system 
> (http://en.wikipedia.org/wiki/CTCSS). The concept is typically applied to FM 
> mode though it can work with any mode where the receiver has a squelch circuit 
> to silence a receiver until certain parameter(s) are met. In this case, a CTCSS 
> decoder would keep a receiver silenced until a signal modulated with 67 to 257 
> Hz tone is received. And, the encoder does just what its name implies -- it 
> modulates a transmitted signal with a 67 to 257 Hz tone (at some level 
> significantly below 100% modulation). 
> 
> 3 thru 8. These are quartz filters that are used to specify the final 
> selectivity of your receiver (or the receiver section of your transceiver). 
> There may be more than one Intermediate Frequency involved but, at least one. 
> IF filters have various parameters: 
> 
> a. Center Frequency 
> b. Bandwidth at 6dB down from maximum 
> c. Bandwidth at 60 dB down from maximum 
> d. Shape Factor (the ratio of c:b, above) 
> e. Insertion Loss (at the middle of the passband) 
> f. Group Delay (time delay within the passband) 
> 
> Not all parameters are always listed. Each type of filter has advantages and 
> disadvantages, and every user has his/her preferences. The manufacturers 
> usually supply something on the order of 2.7KHz bandwidth as a "standard" unit. 
> Generally, the optional narrow filters will be used during crowded band 
> conditions and/or narrower modes. On the down side, the narrower filters tend 
> to "ring" more than wider ones. Select an optional filter that best suits your 
> needs and preferences. 
> 
> Vy 73 es gud dx, 
> Bryan WA7PRC 
> 
> 
> 
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