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I have been? having a great time working Pota chasing Activators.? ?I have 32 states worked and 26 confirmed on Pota since June 5th.? All cw and 95% on 20m.? Using inverted L up 27ft and

I was just going to post that. Thanks. *MEMBER BULLETIN* July 1, 2024 Dear ARRL member, *Effective 12:00pm ET / 16:00 UTC we will be returning Logbook of The World? (LoTW?) to service*. As work

73, Eric NF6S ex WD6DBM ?

73, Eric NF6S ex WD6DBM ?

Thanks.? That explanation is what some of us were guessing.

Thank you Phil.? ?It was perfectly readable and reaffirms my belief in adding the diode.? ?Thanks, Doug

Doug- Attached is a rather lousy scan of the page but should be sufficient. Let me know if you have any questions. regards and 73 Phil, KD6RM

Could you please post a picture of your quoted material?? I would love to read it.? Thank you.? ?Doug

Eric and all, This is the latest re Covid quarantine. Hiroki AH6CY The nation is “in a different place” with the COVID pandemic than it was four years ago, said Dr. Mandy Cohen, who directs the

Hiroki- The zener? protection diode is a common design practice and is favored by Wes Hayward, W7ZOI. In his ARRL publication "Experimental Methods..." he explains the design on 1.19, fig. #1.35.

I just found out I was exposed to covid either Friday or Saturday.? What is the current thinking on quarantine?? Needless to say, I won't make Baylands.? Again.? However, the batteries in my KX2

Doug and All, I took a look at Steve's ATS-4 and Doug is correct there is a 47V zener diode across the FETS in the PA, so this has been used on simple CW amp. designs for some time. I still think that

I also have a Q-Match manual tuner that has a tune mode with a resistive bridge that keeps the SWR below 2:1 under all load conditions. I agree, this type of tuner will protect these simple FET QRP

I will be out of town this Friday, so see you next week.. Dave W6VYC

I would like to do an infrared survey of the board and zener running into an infinite mismatch. If the power is going into the 1 Watt zener, it might be overheating. If some power is being dissipated

Connie.? Hiroki had 2 sets of finals burn out because he was operating into a high swr.? When he put the diode in the same radio, he was able to transmit for several minutes with no antenna attached

I would gladly trade a little power lost for protection, but I am not yet convinced that the diode actually provides protection. Show me a side-by-side test demonstrating that the radio is destroyed

It’s possible that manufacturer(s) could retune the output circuit(s) to get that power back. We should tell them to add this zener. [email protected]> wrote:

6% is about 0.5 dB.? The difference won't be heard.?? Good to have protection for the times when something wasn't connected or the tuner wasn't or ...

I have more data.? I measured the power out on the Trusdx with and without the diode protection.? ?Here is the data: Band. W/diode. WO/diode. % lost 80.? ? ? ?5.96.? ? ? ? 6.35.? ? ? ?