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Imaging me with egg all over my face ...not a pleasant sight ...You are indeed correct ...I apologize (if I can )? t9 to t10 bypassing the 4 transistor array ..Feeding directly to the gates of the

Going T9 to T11 means you are bypassing the 4 transistor driver plus the IRF510's. T10 is before the IRF510's, T11 is after the IRF510's. So I think you mean T9 to T10. In the very informative post?

Well ..It shows T9 to T11 because I did on purpose bypass the 4 transistor dirver stage ... Maybe Ciss being what? couple hundred puf's ??? what is shown is exactly as it is Be aware I have NOT

Move it off the processor board?? Mount it on the (ground plane) backside?? use some formable small diameter coax to feedpoints ? JIm

Welcome,? It can be annoying when data sheets get revised and important information left out.? Just found a 1978 Fairchild diode data book online. While using such an old data book may have hazards

Hi Allison, I agree the drivers are a good idea, would be a way to increase the drive to the mixers, especially if the driver is placed closer to the mixer, and reduce crosstalk. My comments on the

I assume that's T9 to T10, not T9 to T11. Would be surprising if you could still make it work well 80-10m after removing the driver stage. It takes significant power to drive the capacitive load

"I got better results by replacing C22 with filter and leavening R27 intact!" Raj --------------------------------------------------------------------------------------- ???? ? I wrote that response

Allison, Sorta..... Removing that R3 from the board frees up several cubic inches in that area and moving the Tx/Rx function to another "R3" on the LPF relay board greatly reduces the RF wiring

Kees, The diode mixer needs a non reactive, 50 ohm match on the IF side. If this is not so, it will generate distortion and birdies. That's one of the two purposes of the bidi amp. Directly connecting

So ..Thinking of this and that ...Came to the blinding revelation that the IRF150 is NOT a current controlled device, but a voltage controlled device ...With that in mind, I bypassed the main current

Ah, Siri! That was supposed to be the most wire, not the most water!

Ricbard, you might consider a Magnetic Loop. It will be hard to get high efficiency on 40 metres, but at 20 metres I have had success with a 1 Metre diameter MFJ loop and 10 watts. If you have a large

Timothy, that book from the ARRL is extremely nice I think Alyson summarized how to get the best HF antenna, given whatever situation you’re in: but the most water, the most clear of attenuating

I would recommend putting the voltage regulator in the supply line to the TDA2822.? I did that before applying power to my kit and have not had a problem since then.? I have very high volume levels

Tom, Go back and read what I've posted.? Any load that creates a current flow increases the crosstalk. Using a CMOS buffer with minimal capacitive loading to the 5351 as we want NO current flow.

Great find!? That information is not in the most recent datasheet.? Current limited output buffers would explain a lot.? However, having a low Rload with current limited outputs would mean slower

I would try any of the mobile whip antennas mounted to the balcony railing and use a quarter wave wire spiral wound on a 4'X4' wooden or PVC frame as the counterpoise.? Just notch the frame to wind

Allison, I agree with everything you have said here. I really don't have anything new to offer at this time. I've moved on to other, more pressing projects. Perhaps I'll get back to the ubitx as the

Yep! That's the whole point of a single point ground! Run the negative lead from the radio to the battery! tim ab0wr "iz oos" <and2oosiz2@...> wrote: