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Thanks for the offer of parts Chuck. I considered making a parallel capacitor but figured that the value of each individual capacitor would need to be fairly close together in value. I do have 330 and

Colin, I am sure 2x270pF (540pF) will work just fine.? Anything marked 510 isn't going to be 510 anyway.? You can use the toroids in the picture for the BPF, mine uses 9 turns on 37-6 cores.? You

Curt, I did this as an update to the user guide July 2017. Pretty close to the version with the VNA test fixture. The Elsie model is also dated 7/2017. Emacs! The 250 pF capacitors don't seem to be a

Chuck, Didn't your recent work with the NanoVNA show best performance using? parallel inductances of 160 nH, parallel cap of 800 pF, series inductance 3.9 uH, series cap of 33 pF? 72, Curt KB5JO

Colin, I used 330pF and 180pF for the 510. The 240 nH 8t on T30-6 and the 4.7uH I filled a T30-2 up with #26 then overlapped about 5 turns more. The 47u is a 10% but the filter came out quite close

Curt, I have just test driven the Sea Sprite 20, it looks as though I have further work to do. I was getting very strong BCI. The station was identifying a "Radio Armenia International transmitting

Colin, Beautiful! You do nice work!? Fast too!? I still need to print out the wrapper for mine several years after building it.? Wish we could QSO 2xSprite but likelyhood of that for awhile is

My Sea Sprite kit arrived at the weekend. I've just finished building the board, I've built the rig for 20m using a low pass filter. I've just done the smoke test and was pleased to observe that the

The "Lil Squall" with 7114 xtal is on about 7116, nt sure why, need to investigate I suppose.? Calling CQ with 1/2w, got quick answer from N5KIP 209 miles north of me @ 2:20PM local just now. 72,

So I am guessing this one with the 6.2uH inductor is on 40M?? If so, let me know when you are QRV n I will give you a shout with the Lil Squall which is still on 40M. Curt KB5JO

Curt, your 20m success is Got the Sprite finished an did some evaluation. First, I've installed SIP pins for the filter parts and using the 2.5 mHz version. I attempted to use an FT23-43 core for the

Colin, Yes Paul is famous, this is only second time have worked him. I wanted to mention that for my Sprite the trimmer is installed at xcl where the schematic calls for a fixed 22 pF cap, believe the

What a great catch Curt! Paul NA5N is a pretty famous QRPer and he plays with some awesome antennas! ;-) I'm quite looking forward to my Sprite arriving. 73? Colin

Second QSO, this time 2xQRP with NA5N n NM, about 750 miles from me.? He was 559, he gave me a 329. So far 19 QSOs with 9 states ( 7 on 40M, 2 on 20M ) using the Sprite.? Not bad for a $30 radio.

No Qs today :-(? At least RBN hearing sorta hearing me in NH, AZ, and KS today. Proof of concept? 72, Curt KB5JO W3UA ( http://www.reversebeacon.net/qrz/W3UA ) KB5JO (

That might be inducted, do you have any clamp-on ferrites? Or some FT50-43s you can loop the supply lines through a couple of times? Even higher type maybe 77 to get more inductance...or a series trap

Ok, must be peculiar to the MFJ-4125.? I hooked up the SEC1235M and no hum heard.? No issues using the MFJ on any of other radios except for Pixie variants.? Sorry for the detour. Both supplies

The shack supply I used was an MFJ-4125 switcher. I will try the SEC1235M and see how that sounds. As mentioned, all of my Pixies ( none are “original”), sound the same. I will run some more

Just as a base-line sort of check, Hooked up the original Pixie, 7.122 MHz crystal, earbuds, 50 Ohm load, O'scope across earbuds, Butternut and long wire antennas. LM-317 adjustable bench supply,

Curt, I don't have a Sprite on hand just now but will soon. I do have an original Pixie and I'll see how that behaves with my LM-317 most used supply and other rig power supplies; an old Kenwood