开云体育

A "grounded gate" of what, Marco? Not of the IRF510 or any other MOSFET. The current through the device is determined by the gate voltage. with a gate at 0v, the current through the device is

Marco KG5PRT and Rahul VU3WJM Grounded Gate with a pair of IRF510's in push-pull configuration is interesting. I may have to try it sometime. In tube technology the grid is placed between cathode

Webpage says 15W max, the uBitx can do more than that. Could be the tuner is good at 15W only if the antenna presents a reasonably low SWR, anybody know?

I cheat. I have the same tuner but use a Youkits FG-01 antenna analyzer to tune the tuner, then connect the tuner to my QRP rigs. I also use it traveling with different end fed antennas and light

Look at the Emtech ZM-2 its a fun build not to pricey and works great! It tunes almost anything and getting 1:1 is easy. I have used mine for some time now and love it, wouldn't trade it for the

Ok so its done! specs are as follows 24v Source 5w drive Total amps CW key down 2.998 on 40m got just short of 40w out swr on all bands 160m = 1.02 80m = 1.04 40m = 1.10 30m = 1.16 20m =

Much of recent CAT related discussions on this group seems to have focused on the radio end of the control scheme. Only a few comments have mentioned commercial and non-commercial PC software to work

Would grounded gate work for SSB? Marco - KG5PRT [email protected]> wrote:

Thank You Mark, Define “not working?” Do you still get any output on the display? Just black squares. My guess is there is no program loaded. Do you get any audio out the speaker at all?

Bitx40 firmware update instructions can be found at https://www.dropbox.com/s/s327me4umdckcpc/Raduino_SW_install.pdf?dl=0 AL? VE3RRD

The Nano can work at anywhere from 2.8 to 5.5, so it’s not phased by seeing 3.3v on it’s input. I2C is an open collector bus, meaning none of the devices on the bus actively drive the bus high,

Define “not working?” Do you still get any output on the display? Do you get any audio out the speaker at all? Also, what did you attempt to do when it stopped working? What instructions were you

New to the BITX community, but have had some Arduino/DDS projects in the portfolio, and while awaiting my rig have been doing dangerous and foolhardy things - reading manuals and schematics - hi

Greetings! I am still having problems understanding how to do #Bitx40 Firmware updates.? I wired up the needed mods for CW.? I still had a working (SSB only) Bitx40. I tried to update the firmware

Did some spice simulations .. results are astounding

A good way to establish initial settings is to set both capacitors to mid-point and tune the inductor to hear maximum noise from the receiver.? Then use the capacitors to peak the noise further.?

Go here: http://www.mpja.com/LCD-Displays/products/361/ You can get both 2 and 4 line displays. No relationship to the company, just a recurring customer. Vince. -- Michigan VHF Corp.

I understand Ashar's reasons for not including the board drawings etc, as these have been misused by commercial entities in the past. But Dimensions of the Mounting holes etc. would be helpful ,

Over the years I have seen the love hate relationship with IRF510, it has been used and abused in CB, KPA100 amps of Elecraft right down to Ubitx. Everyone grumbles about the high gate capacitance ...

Yep a resistive bridge swr unit something like this simple to build and will protect you pa only for 5watt use