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Reversing diodes shorting/ blowing fuses and diodes in series with power leads, brute force, works but is quite unnecessary. See more far more elegant solutions at ubitx.net ( http://ubitx.net ). ?

Re. BITX circuit design using circuit simulation... Simulators are not just for graduate engineers. Hobby level persons can also use them to evaluate circuits, and even to design new circuits by

On Thu, Jun 7, 2018 at 9:27 AM, bobh_us<rwhinric@...> wrote: Microsoft has done a good job with Minecraft after buying it from Mojang. I’m keeping an open mind.

If you notice a lot of high-frequency hiss in the receive audio on your BITX40 there is a simple remedy for this. (This might be more noticeable if use headphones while operating.)? There is a little

BITX QSO Afternoon/Evening, Sunday, June 10, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere. Join us as we make contacts with our BitX-40s or uBitXs or anything else on 7.277 MHz

I have been looking into using a different encoder, I have an optical 400ppr which is very smooth (fresh from China) looks to be good quality but is close to 2 inches in diameter. I ran across a neat

I'd put that fuse in the +12 line first.? Easy to imagine supply ground having an alternate path through house wiring and RF ground rods, vehicle sheet metal, etc.? I believe Allison once said she

I've printed this out. Something to do on a rainy day maybe? Thanks, tim ab0wr "Jerry Gaffke via Groups.Io" <jgaffke@...> wrote:

Jerry, I've prototyped things for 55 years. It's why I like Surfboards so much. I might try LT-Spice someday again if I ever get any spare time. My ubitx is built in a U-type case, a U bottom matched

I agree with Jerry that it sounds like maybe the CW keying is too sharp. ?That would explain a wider than expected bandwidth.? I haven't really looked at the uBITX schematic in any detail so I

In the event that the power supply voltage is reversed, the reverse polarity protection diode, as suggested by HFSignals, will short circuit the power supply.? If the power supply has a small enough

As Allison says, the simulation and the real world won't always agree. For example, like most spice simulators, it simulates the normally used region and doesn't bother with bounds checking. So the

Check message #45085 Jim - W0EB suggests the part number in his message from Digi-Key as being the exact replacement. Rick KN4AIE _____ From: [email protected] [mailto:[email protected]] On Behalf Of

All that PA-PWR goes to is the IRF510 drains. There's an intrinsic diode from source to drain inside the IRF510 that will? suck all the PA-PWR you care to give it if that supply line gets reversed.

This encoder is similar to the Bourns PEC11L Series - 11 mm Low Profile Encoder.? Search for part number PEC11L-4115F-S0020-ND at DigiKey.com and click on the datasheet link for this product.? That

Well, if you're going to use two fuses, don't you need two diodes?

Yes it should work fine,? might knock down the power a little. Would be better with 4 Schotky diodes. They are going to HEAT!?? Probably over a watt for each of the 2 conducting diodes.? On

Kees has been updating his list.? Check here... /g/BITX20/files/K5BCQ/K5BCQ%20AGC-Audio%20Kit%20OrdersALPH.ods ? -- www.bitxmap.com ( http://www.bitxmap.com )

I think that bridge rectifier is a bad idea. Leaves your rig antenna port ground a diode drop away from your power supply ground. A single schottky power diode in series with the supply coming into

Hello For my uBitx I use a Pacific Antenna kit named VoltTattler. This montage has the following features: - Simple through-hole construction - Draws only around 1 mA in normal use. - Reverse polarity