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Hello, Has anybody tried this microphone preamp : https://www.analog.com/en/products/ssm2167.html Evaluation boards can be found for about 5€ looks good to me but I am no expert ! 73, Yannig - F4IUJ

Me too! Ordered a qmx+ kit at Dayton. Thanks Raj, N2RD ¡ª Sent from my mobile Rajiv Dewan rmdewan@...

Thats strange that you get 4w+ at 60m??? Reset factory defaults to erase calibration?

Ludwig, Thank you for your reply. Please note my amended post above. I ran Diagnostics in Putty and see the following RF Output: * 60m - 4.3W * 40m - 0.6W * 30m - 0.5W * 20m - 0.2W * 17m - 0.1W * 15m

Perhaps you could buy a quantity, get a small discount and share the shipping cost with other hams. 73, Don N2VGU

Revision to original post... I just checked again and I'm actually getting about 4W on 60m but then it drops to 350mW on 40, ~100mW on 20m, 75mW on 17m and 0mW on 15m. Help! 73, Robert VE7ZN

hey eric, I'd like to buy a fully assembled mic. please and thank you. Brett/K5BEZ K5bez1 (at) Gmail.com

Chris, G5CTH <chris.rowland@...> wrote: This is interesting. QDX has the same transistors in the PA, doesn't have envelope shaping by design, and typically doesn't routinely damage the

Robert, maybe this document ( /g/QRPLabs/wiki/37486 ) from the QRP Labs Wiki is helpful. 73 Ludwig

On my mid-band QMX ....I wasn't going to do it. I'd read several horror stories but then, as an "experimental amateur radio station operator" I couldn't help myself. The SSB calibration routine was a

Looks nice; well done! From the photo, have you also added a heatsink?

Jonas, for this you may use this document ( /g/QRPLabs/wiki/36879 ) from the QRP Labs Wiki. 73 Ludwig

You can find it also at Farnell. 73 de 9A7AM

Update: Managed to remove L101 by cranking up the temperature on the hot air station. I created a new L101 by putting 29 turns of magnetic wire on a FT37-43 core to get ~300uH as a temporary fix until

Hi Kiril, There is always the option to using a mic preamp with the capsule at hand, which is what I did. Mel. M0KMD.

Thanks Stan! Even though I had looked at that long connector multiple times and could not see a problem, I took out the soldering iron and reflowed all of the solder joints on the front of the display

Next check is to make sure both ends of each pin are correctly soldered in that long connector between the LCD module and the LCD mount board.? It is easy to miss one, or short two together

I just purchased a complete at FDIM vendor night. *I would also like to be added to the group buy of V2*. How will the information be delivered if a buy is happening, costs and timing? Joe N7QPP

Thanks guys. Yes I am working into dummy load and I have run the mic calibration (seems like 40 to 55 all sound good until I turn on compression). I'm pretty satisfied these aren't variables in the

Hi Guys, Thanks for the replies, Firstly, I was unaware that depressing the "Edit" button while the U3S is in idle mode (awaiting the start of the WSPR transmission) puts the U3S in transmit mode. If