Well, my #2 Buildathon 40th anniversary TT2 was built yesterday with 30M in mind, plus the higher power mods.?
I requested the 2N3866 final to be in place of the PN2222A, plus I replaced the 56 ohm R7 emitter bias resistor with a 1/2-watt 2 ohm metal film resistor. I replaced 100pf C2 with a 68pf & dropped in a 10.106 & 10.116MHz crystal that currently has a nice pure tone on 10.11469MHz under a 49.6 ohm dummy load. VOM measures 8.52 volts for a stable output of 802mw according to the formula.
The bandpass filter I substituted two 37-6 (yellow) toroids as called out by the original TTT schematic for a set of 37-2 (red). The caps I rummaged through my spare parts bin matched the band module of the Super Tuna chart better.?
I will save the yellow toroids for the 10M version on my ST & my Beaconator ][ TX as the chart calls out for it specifically.?
Anyway, getting 2 days of rain here so will cut a set of wires for 30M for my Tuna Tunah Tuner & am setting up a sked up with Aaron, W4ARB who usually does a morning POTA from Tuscigee NF 2-3 days a week in central AL on 30M.?
I also want to whip up my Limerick Paddles keyer yet to save my wrist. Now that I got the original Tuna Helper T/R switch and the ][ version both working, I can get a generic pelican case going for each station setup so I can grab & go for my skeds & POTA activations.
I will be working on my Beaconator ][ next, having 4 band modules, thinking of my favorite POTA bands now, but also bands I haven't already built. I have higher power rigs I use often, but always have solder melting on the bench.
Below is from my testing tonight.
Cheers,
David Knapp