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Warren, The -30dbc for IMD of third order is good.? Whats no so good is only 2W. It was actually hard to find that data for a lot of the QRP/low power radios. For many it doesn't exist.?? I never

I have one I built and was thinking of giving it a go.? Glad to see others feel the same way.?? Perfect for the band and power range. 73, KM4OLT Michael

I am unable to achieve IMD products at -30 dBc or better at any power level above 2 watts. I have searched this board and do not find IMD measurements. What Is the consensus on acceptable IMD levels

I can help moderate the new forums(s). I'm an electrical engineer and Extra class ham. Jim

Advantage of Spice simulators is that you can define, or re-define, the parameters of a specific component, or components. Almost everything is programmable. This lets us use Spice simulations for

Hi Arv Yes Arv, in these conditions I want to be moderator. I will call the real technicians when the questions will exceed my abilities to answer. 73 QRO for F1BFU

Jack, Wearing my KISS hat! 73 Bob GM4CID

Gilles F1BFU Thanks for your comments. Moderators do not have to be technical specialists. The task of moderating a discussion group seems more like "herding cats" than verifying technical claims. The

Sorry guys. A Typo on my ZM-2 recommendation. If you “do not” need a metered SWR display. The tune to a dim LED works great except in direct sunlight. In this case I use a small shade.

I would also recommend the ZM-2 tuner if you do need a SWR meter reading. It has a resistive bridge to protect your rig, very fast to tune, and the range is amazing. You could likely tune to low SWR

Hi Mike, The tuner itself does not care how much power you use to 'set' it as long as it isn't *more* than it can handle. It is not impressed if your TX can pin the needle or not. If your uBitx will

Dennis I will keep you in mind for a Moderator. I'm still working on a few loose ends and then will be back on the new test equipment group effort. Thanks again, Arv _._

I second that.? Cheap and easy.? I have a few around here, one standalone in a box. Some of the others are built into a radio.? Does the job. Allison

What you believe and what I've found to be the case after careful testing of setups is yes, you can get that kind of accuracy. The back up was HP 5753C and Agilent 5357A Network analyzers.? Within

Konstantin If you have a computer running Linux (Debian or Ubuntu works in "run-from-pen-drive" or run-from-CD" so you don't have to do an install) you can use the Arduino IDE to write to your less

I'm able to tune on the same tuner with a non Bitx/uBitx with 6 watts. 73 Ken VA3ABN

Most of that is what we call birdies.? They are spurious tones(internally generated signals) That you can tune through and tend to tune faster than normal signals via antenna. Its a feature not a

Thanks Gordon / Alison, In the mists of time, along time ago now...... there was a suggestion of what about using 'this or that', off the shelf relay board, I agreed with another contributor that it

I use this one. http://www.4sqrp.com/4stuner.php ince, N1VIN

If all you want is an SWR meter and are on a budget, consider this guy from Diz at $12 for the kit: ? ??http://www.kitsandparts.com/bridge.php The Emtech would be nice though, no need to haul out