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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

The PS noise is essentially 60 hz hum.? What is strange is the Pixie(s) are the only ones that exhibit this here.? The Rockmites all tolerate power from the shack supply quite well.? All of the

Curt, Good job on the 20m Sprite, trimmer for the series section and the 5109. Can you determine the approximate frequency of the noise? If so you can notch it out. Otherwise a brute force

I have Sprite on 20M and using a trimmer on FL4 to allow peaking output.? Also using a 2N5109 for PA.? Rigged a battery to supply 13.8 V, the shack supply causes too much noise (any suggestions?).?

I have the Sprite on 20M now.? 350 mW into a dummy load.? Now trying for a contact near 14.061 72, Curt KB5JO

Curt, Here's the wider 2.5 MHz band pass values intended. Emacs! You seem to have the 2.5 MHz BW filter values. This is the filter for 20m Emacs! These values look like RF Chokes parts, they aren't

Gangue, The MAIN difference between VER.1 & VER.2 is the added trimmer cap in the OFFSET section to allow loading a crystal to change its frequency in the receive mode. In the KEYING section the

With your most recent message, I see the same values for the 1.5 MHz width and 2.5 MHz.? Maybe you meant to send a different picture. I guess don't know why mine is as it is.? I doubt that I

Curt, Missed this one... I'm still confused by those FLxx markings, The board was revised but I didn't get the v2 board or artwork. The v2 manual v1 board was patched to look like the v2. I didn't

Here is picture of N5ESE Altoobs.? Of course it uses some conventional tubes at 150V B+ for 2W output Curt KB5JO

Curt et All, The article is on pages 20/21 of the May 2006 magazine. I don't have that issue on hand but I'm a subscriber so probably can get it if anyone is interested. It's a pentode in a Pierce

"LookMa" kit using space charge12K5? tube. https://pastimeprojects.wordpress.com/2012/01/29/look-ma-12k5-kit-is-back/ 20 mW?? Could proly fit it into a tuna can with tube n crystal plugged into the

Rex, Here's what those tubes were for... Attached is the circuit of the 12AL8 I built as a potential kit for the 2017 BuildAthon. It works but very little RF output. Chuck, W5USJ (ex K2OFN) ARCI 5422,

Gangue, I can't keep every kit on the New Stuff links or even the HOT Links sections forever as it will just get as long as the index to ALL my kits. I just printed the entire list out last night and

Sprite Band Pass filter question for Chuck: My Sprite has an output BPF labeled "V2", FL3 n FL7 are 1200 pF; FL2 and 6 are missing; FL1 and 8 0.39uH 11t 37-6 core.? "Default" has FL2 n FL6 = 1000 pF;

Curt, it's all your fault, I'm blaming you! I just placed an order for a Sea Sprite. I should get the Lil' Squall going in the mean time until the Sprite turns up. 73, Colin

Like the Sea Sprite because of the more open layout than the Lil Squall.? I have no BCI with either of them.? Installed a trimmer in place of the 22pF xcl so can tune around about 3 kHz.? Bought

To me, the Sea Sprite was a better kit.? That was my first attempt to use a band-pass filter for the front end.? Mostly to minimize the BCI rather than use a high pass filter. It seemed to work but