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If fixing the connections does not help, the only thing to do really is take it out and rewind the coil. There is a lot of information around on how to do that. Watch out especially for sharp edges on

First, flux the connections and re-solder the connections. Put the heat to it, maybe a bad solder joint or enamel was not all off the wire? Just a guess? The only other guess is that somewhere along a

What is the best way to troubleshoot a toroid? My receiver is occasionally dead until I tap #? toroid, then it "jumps" to life. It remains working unless I accidentally hit that toroid again. It has 6

I have a bag of 30, tiny electret mic elements. I am thinking of connecting 3 in parallel electrically to see if It will improve or even work on my Bitx. Not sure how it will affect the input

Yeah, I forgot about Diz. He's good. He also has a toroid kit for the WA2EBY LPF assembly, but not a cap kit as far as I know... john AD5YE

Mike: As noted in the notes to the amplifier, Farhan uses ceramic capacitors AND recommends a maximum RF voltage of 50v or so. Mica caps are the best for such an application, but good ones nowadays

Did you try kitsandparts? They have 'em [depending on value] as low as 1.30 ea. Vince.

What do folks do for the Mica Caps in all these band pass filters. In the old days I had lots. I know they are great and usually over 200V. But I see they are $2-3!! EACH! Ouch! Mouser has some. Mike,

Hi Jerry, Yeah, my BitX is fine as it is, even at 5W, 12V. I'm thinking about hooking it up to some other HB rigs begging for more power... putting about 0.5 ~ 2W out on CW or DSB. Gotta love the

If you have a Bitx40 it already has a comparable IRF510 linear amp, giving around 20 to 25 Watts when powered from 24v. I do like the LED RF detector on the output. Jerry

I finally got all of Allards updates in....when I was finished I noticed that the audio output from the speaker was garbled and sounded off frequency. Changed speakers ( all 8 ohm units) no

I cut jumper L5 and replaced it with a variable inductor from out of the junkbox. It was fun going through the filter from lower to upper side band. Now when I power up, the raduino won't show

I hope these are the latest .STL files. I have made several of these.? Don't allow the print to curl at the edges. I used PLA 200 Degrees and 50 Degrees Platform. Don't over counter sink the bolt

-- Mike Hagen, WA6ISP 10917 Bryant Street Yucaipa, Ca. 92399 (909) 918-0058 PayPal ID "MotDog@..." Mike@...

This Bezel fits the supplied LCD. You use flat head mounting screws, this covers them. I use supports when printing it, with front side up. This is rear view. The recess snugly fits the metal rim of

I just ordered some simple ones with no screw holes that I can custom my way in, thanks for the offer Dave wish I had my 3d printer still. I plan to get a hand saw, the hand work doesn't bother me yet

Thanks a lot Farhan! That's perfect, I'm building it today. What a nice and simple circuit, respectable power output and also a great detailed post on your blog. FB! Dan.

http://hfsignals.blogspot.in/p/25-watt-linear-for-40-and-20.html?m=1

i built a similar linear for 40/20. it works very well. - f

I bought it on Amazon, but they no longer carry it. The closest I can find now is from the Container Store: