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The designer has voiced he does not want to offer a board.? The project is dead. Lee, w0vt

i would like (at least) one jerry aa1of franconia nh

Steve, if the Chinese wanted to copy it, they would do it gerbers or no. If I were the designer, I would be more concerned about having to support the builders if I produced new boards. One way around

I cut my gums on 741's and 2222's.? Put down for a couple.? Thanks, Howard, n3fel

You can look back through the message subject for the details. The designer of the 2N2-XX chose not to release the Gerber file for the PCB. Frankly, I wholeheartedly stand behind his decision.

What's the status of this? I would be interested in this as well.

Just keep in mind that the designer put those tuned circuits in for a reason. He did it so a bunch of spurs would not show up on the air and exceed FCC specs. Hard to know exactly where they all are

Jerry, This is very helpful, especially your explanation of the right side of T3. ?? I think I'll play with your idea of bypassing T3 and see what it does to the stability of the power out. And

Thanks for the group and all the effort it takes to moderate a group. Thank you! Jim KF9VV

In my previous post I was wrong about why the secondary of T3 is non-resonant. Double tuned RF transformers are quite common in radio gear. I think on T3 for the Rose-80 with a secondary of only two

Thank you for the details about the caps and transformer.

John, I prefer to have these conversations within the forum Often there's somebody else with the extra info needed to resolve an issue. As Ryan says, people come to this forum because they want to see

Hey John, You wrote " Sorry to drag the group through this, but ..." Please, please.... drag the group through it! There are a lot of people here whose joy is to read through such issues and learn

Jerry, Thanks for all your response and interesting ideas.?? My frustration beyond the fluctuation in the output over about 100 kcs, is that I don't really understand how the filter works.?? I

http://qrp-labs.com/50wpa Hans released this today- $29.50 for a 50W PA that includes filtering and heat sink. It's class C, CW only. Could be a nice addition to a rig during the solar minimum :) --

Correction:? 24-22=2mhz But you knew that.

Yes, the capacitance change of a varactor per volt decreases as voltage increases. But remember that the capacitance change has more "worth" at low levels. For example, in a tank with only a varactor

Most QRP CW transmitters get by with just the output low pass filter because the oscillator is working directly at the desired transmit frequency. There is no mixer to create spurious products. The

John, Why offline? Perhaps we can all learn something. I have no experience with this particular design. But I don't think you have a layout issue. Most CW transmitters are broadband all the way out

To make a long story short, I am have a problem with the output power varying a couple watts over the tuning range depending on where I peak the filter (T3 T5).? I built the rig using ugly