[TenTec] Sidetone revisited

[cherry@getnet.net]

I switched to a keyboard for high speed CW. 
Jim W7ANF

Quoting n4lq@iglou.com:

> Excellent. This may be one of the factors that gave the Triton IV through 
> the Corsair a reputation for fast QSK. Every millisecond counts! Now I 
> will need to re-modify my Omni C for the original sidetone and add the 
> filtering. Also, I will check to see where the sidetone triggering 
> originates. I believe it's the T voltage which is a product of some 
> timing components from the key line. If so, there may be another 
> opportunity to reduce delay. Trying to run a paddle at 40wpm isn't easy 
> and eliminating that sidetone delay will certainly help. 
> 
> Of course, the type of keyer will have a huge bearing on this delay. I 
> use an old MFJ with the Curtis 8044 chip. I'm not sure what the delay is 
> between key closure and output nor have I ever heard this discussed but 
> it needs to be investigated. 
> 
> Some guys use the sidetone in their keyers which is fine if you are using 
> a speaker but I like using my headphones at times. And of course, there 
> is a delay between the speaker and the ear :*)