I was thinking more along lines for amplifier switching. I have PIN diode switches in both of my amps. There are a few AM BC stations within a few miles of me - one is a 50 kW blowtorch and the other
I don't think the big multi-multis care about QSK, anyway. The ones I know of run semi. As for Germany alas, no. I'd love to have a go, though! :) PIN diode switches are, in the end, probably not sui
Just so everyone is clear, *in the US,* the external QSK5 runs about $370 US, while the internal unit, dubbed the QSK5-PC, runs around $270 US. The price difference resides with the power supply buil
The Measures relay speed-up circuit will certainly make the relays close faster, but how does that affect the settling time? Won;t that still be an issue? Kim N5OP "IF" your amplifier has a very fast
If and only if the sole and singular concern is RF quiet operation, the a linear supply is the only choice. If efficiency plays a role, the you choose the technological path. As an aside, in WWII and
Well, yes. But not by intrinsic design in the same way as switching supplies. Kim N5OP "People that make music together cannot be enemies, at least as long as the music lasts." -- Paul Hindemith
Yep, regens, not super-regens. Mea culpa! Kim N5OP "People that make music together cannot be enemies, at least as long as the music lasts." -- Paul Hindemith
There is such a thing as super-regen receivers, but they aren't of much use for narrow-band modes and would not have been used at HF at all. Kim N5OP "People that make music together cannot be enemie
This is an apples vs pecans question. Better-stated questions: What's the probability that a properly-designed and engineered linear power supply will radiate RF noise of sufficient amplitude to be b
Unless the amp is QSK capable or he sets the OII to behave as semi QSK, he'll almost certainly suffer hot switching of the T/R relay. Very bad. Kim N5OP "People that make music together cannot be ene
Depends on how it's set up, but a long delay between keying and application of RF drive, along with a delay between the cessation of RF drive and unkeying the amp is needed to give the typical open-f
There are some QSK systems fast enough to run with a single line if the drive is delayed by a few ms; the Ameritron QSK5 PIN diode switch in my AL-1200 is one. But it does have a minimum time between
I took a slightly different approach: I built a new regulator board for my RS-35M linear supply that allows for remote voltage sensing. Thus, I regulate right at my distribution point, *not* at the s
I never saw that much difference in my 566. However, 10, 12, and 15 m are all about 90 W while the other bands are right at 100 W. this is with a well-regulated supply volt has of 14.9 V. I found tha
I think the thing to remember about rx antennas like small loops is that, while some of the noise may have a preferred polarization and small loops may provide some polarization isolation, they mostl
I have a K9AY loops system that I bought form Array Solutions. It's rather pricey, but for me it was a choice between time and money. I had the money, but not the time. I think it cost me between $45
I'm running 3.0xxxa on my O II and do not have that problem. Have you tried any of the various resets? Kim N5OP On 8/31/2013 1:18 PM, Mike Chatfield wrote: I am running version 3.033xa just installed
Ummmm... Not 3.0xxxa on my O II, but 3.033xa. Even with typos, I'm not experiencing the problem. Crummy band conditions are another story entirely. Kim N5OP "People that make music together cannot be
Rick, you make an excellent point! Are you speaking of only IMD performance? If so, how good is good enough? Speaking only of 3rd order (O3) IMD, my old TS-930S has O3 IMD of -35 dB while my Orion II
Seeing N6BT's call, I decided to wade in with my short OCFD story: I have a Force 12 Sigma 80, a vertical OFCD for 80 m. It uses a hairpin match and very beefy loading coils. To handle the inherent i