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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

I was wondering if my 2 AGC boards were sent yet? Thanks VE1BWV joe Basque [email protected]> wrote:

I'm a newbie on here and just dipping my toe into the world of BITX's If you're running the radio at 13.8v is there enough wriggle-room to cope with a 1.4v drop using a bridge rectifier? Reverse

Jerry, thank you so much for that running start on LT spice.

Speaking of Fusing and Over-Current protection. I am experimenting with an LT6108 for a Real Fast over current limiter. The circuit show is my 2 PCB, the LT part is fussy about getting reset. I have

So it's narrow when the key is down continuously, but a string of dots is 1khz wide? That would be envelope shaping.? Has to do with how quickly the transmitter turns on and off when you key it.

Here's another shot at embedding my Mouser search, maybe this one will work: ?

Just got a v3 board running today.? I was monitoring CW on my IC7300 and noticed that when transmitting, i.e., a string of dots or dashes, the bandwidth would widen to 1Khz then return to very

Here's a Mouser search for stuff with Vce of 12v+, Ic of 600ma+, Ft of 300+: ?

Finals, PA-PWR, output devices... the same. The other is rest of rig. PLEASE, put the fuses before the polarity protect diode.? Example Fuse, reverse polarity protection diode, radio. Allison

The "Fix reverse polarity" section on ubitx.net suggests a 0.5A fuse for the "rig" and 2A fuse for the "finals," but does not specify which wire is which.? The schematic says that the brown wire is

In the old parts box I have Ck722s, 2n107, a few SB100,? 3n35 and 36(tetrodes!) and the first JFETs (GM almost 900uS, modern parts like J310 are about 20,000) also a pot load of the?early computer

What's absolutely astounding is that it's still a good choice. The 2n2222a has slightly better specs than the original 2n2222, but not by much. Jerry

I forgot the speaker's name, but at the FDIM conference this year, he referred to the 2N2222 as the "cockroach of transistors". Jack, W8TEE