It's not how I want to describe it, it's how Mother Nature treats it. :) If you look at any RTTY signal on a spectrum analyzer with sufficient resolution, you will see sidebands that are the result o
On Mon,9/22/2014 4:42 PM, ken.d.brown@hawaiiantel.net wrote: If you use what I call "real FSK" there is only one tone being sent at any one time. There is no carrier that needs to be suppressed as in
Right. Two different frequencies, the slopes of the sine wave are different at the transition. Call it what you want to, just because it's happening at RF doesn't mean that there isn't that transient
Hi Ken, I'm not calling the sidebands produced by the transientsIM products. What I'm pointing out is that those sideband components are amplified by the output stage and linear amp, if there is one,
I'm confused. First, do you mean after keyDOWN? Second, 17 msec is a VERY long delay to key an amp for CW, and most rigs default to about 8 msec. My Titans follow keying from rigs with 8 msec delay.
Understood, Rick. But 17msec pretty much rules out QSK above about 18 WPM. A strange design compromise for Ten Tec. :) Frankly, I'm both surprised and disappointed to see Ten Tec go for the lowest co
Three good ways, depending on your resources. 1) RTFM for the product involved. 2) Hook up a dual trace scope so that one channel looks at the PTT line and the other looks at the RF waveform, then se
The Elecraft KPA500 is full QSK (diode switched, 600W out into a matched load) sells for $2,100 as a kit, $200 more built, and it covers 160M - 6M. The build is so easy that it's dumb to buy it built
Right -- that's the way most transceivers have worked for several decades. But please answer my questions (previous email) about how QSK is wonderful for you, because I don't understand how it can be
Neither is the Centurion -- it's 1 kW CW, 1.3kW PEP. :) 2dB more power than the KPA500. In favor of the Centurion, it's a tube amp, so it will likely be cleaner than the KPA, which is solid state. I
Think about it, Bob. We've been talking about a dozen or so pieces of gear, some old, and for which we may no longer own or no longer have manuals. 73, Jim K9YC
That would be fine if it works that way, but it does not with most rigs. Have either of you verified that it does (with a dual trace scope)? 73, Jim K9YC
On Wed,9/24/2014 5:11 PM, Carl Moreschi wrote: Actually most radios do work that way. Take a look at the CW RF pictures in QST. There are two traces in the scope pictures. One shows key closure and t
On Thu,9/25/2014 9:02 AM, Roy wrote: I operate everyday from 35 wpm to 45 wpm with QSK amplifiers. With the built-in Eagle keyer, transmitted weight is perfectly adjustable internally and with an ext
That's unusual among the UPS drivers I've dealt with over more than 30 years. All that I've encountered have been first rate. The driver who delivered to the hi-fi/pro audio shop where I worked almos
You might ask on the amps reflector. I suspect the answer is still no. I owned one of these amps for a few years and sold it. The original story, as I heard it, is that Motorola learned that the outp
What causes you to say that? Have you designed and built solid state RF power amps? Have you studied the design of RF power amps? Theoretically, ANYTHING is POSSIBLE, but what is PRACTICAL? Do substi
It's AWFULLY hard to beat a used Ten Tec Titan 425. All generic parts, including discrete semiconductors, pretty easy to work on, a really good, but also pretty basic design. The 3CX800A7s last a LON