It is easy to buy a previously owned K3 or K3S, and significantly cheaper than a new one. I wouldn’t say a new K3S was all that “mid-priced” in April 2019. One of my friends in Colorado purchased a us

I was rather surprised that Elecraft emphasized a discount on the K2 through the end of the month. https://elecraft.com/products/february-2020-specials How much demand is there for a new K2 kit? Of co

Hi Dave, Ok, thanks for your quick reply and the spreadsheet link. Rob, NC0B

I would like to know the 1 dB compression point of both Elecraft amps, and others too, for that matter. Here is the general issue that I first ran into in respect to the Beko 2 meter amp. It was a Fle

That would normally be an adjustment to deal with an amp’s T/R switching time to prevent hot keying. I set my TX delay to 15ms for my Acom and Alpha QSK amps. The Alpha 89 has PIN diode T/R switching,

Typo. I meant I need to add the TS-890S, and the K3 for that matter. Rob, NC0B

Hi Wayne, I use the same pulse generator that I use to test how a receiver's AGC handles impulse noise. The K3 is one of the few rigs where the AGC doesn't get captured by an impulse, like an electric

It takes about 5 minutes to make the measurement. Four minutes to hook up the equipment and 1 minute to measure it on a digital scope. I have data on 12 rigs at nc0b.com/latency Download the PDF. I ne

That will be interesting with current rigs running from 10ms to 180ms. Rob, NC0B

Yes the K3 is cleanest around 35 watts. No I never tested it at 30 watts vs. 35 watts, etc. I doubt you could tell the difference. Rob, NC0B

#kpa1500

My IC-781 cooling kit used 470uF from the fan B+ to ground. I haven’t seen the Elecraft schematic. Rob, NC0B

I don’t know, but a 16 volt electrolytic would meet the Elecraft voltage spec. A 25 volt cap wouldn’t be that much larger, but I don’t know the mechanicals involved. I didn’t find any temperature data

A DC fan, brushless or not, creates noise that gets back into the radio. For decades I sold a cooling kit for the Icom IC-781, and I had a small dropping resistor (since the available supply voltage w

Your neighbor or Field Day! For the price of a 470 uF capacitor, why not do it? Rob, NC0B

Savings at Costco on eye glasses are similarly significant. A new prescription from Kaiser, with an insignificant co-pay, if filled at the same Kaiser facility, would have been $498.00. My third time

I added an FET buffer amp and an emitter follower to the R-4C since there was no IF output. Does the FTdx-5000 have an 9 MHz output on the rear panel? Rob, NC0B

I setup a P3 to work with an R-4C. The IF of 5645 kHz was already preprogrammed into the P3. It works with a lot of IF frequencies, not just the K3 IF. Rob, NC0B

Wayne will have to answer that. Rob, NC0B

The reason for the 6-pole filter vs. the 5-pole filter was for much better (less) passive IMD in the roofing filter. Some 5-pole filters limited the close-in dynamic range of the K3 to the mid 80 dB i

N0QO and I found the issue on transmit and reported it to Wayne. I didn’t know there was an issue on receive. Rob, NC0B