[RTTY] Funny you should mention.....

[Carter]

On 3/29/2012 11:59 PM, Bill Turner wrote:

>  This whole argument over AFSK vs FSK is really nonsense. Both terms,
>  as commonly used by us hams are FSK, plain and simple. How one
>  generates FSK is technically interesting but not relevant to the
>  signal that goes out over the air.

Well, I would respectfully beg to differ. The "signal that goes out over 
the air" can be relevant.

If a modern  radio -internally- uses 'AFSK', usually no problem. 
However, if someone is putting tones into the mic jack -- and has their 
mic gain too high, they will generate spurious (or 'ghost') signals up 
and down the band...and I know you have been in the game long enough to 
have heard this on the bands.

If you use what I call 'true FSK', i.e. a varicap diode changing the 
frequency of your VFO, the trouble condition mentioned above cannot occur.

So, I agree with your statement above in relation to modern radios, but 
it wasn't always so.

Just my 2 cents...

73,
Carter   K8VT