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Bill On the Dentron, see if it uses a narrowband matching circuit, although that would also result in output power varying appreciably across the band. If you have a nearby RBN listener as I do, it

I have the other similar amp, AN762, that I got in the late 90's. http://www.communication-concepts.com/an762-140/ I have the amp built up and mounted on a monster heat sink, with a supporting case

Thanks for the feedback. What about the kenwood 440s? What's its reputation? Sent: Saturday, September 14, 2019 at 12:14 PM From: "iz oos" <and2oosiz2@...> To: [email protected] Subject: Re:

Asher, the 811A amp that I built when I was a kid used more like 2000 V; In the coming year I hope to refurbish it.

The KL203 is a tabu in the ham community. Don't even think to add in parallel or replace C14 with a 500V 1000pf. Il 13/set/2019 19:18, "Sajid Rahum via Groups.Io" <zs735@...> ha

I’m replacing a bad pl259 connector on my Gap Antenna with a BNC crimp connector and I’m having a problem getting the various coax measurements like how far back to cut the outer jacket, the

I have a uBITX V5 with the CEC v1.2 fw and installed a RTL SDR dongle as mentioned on de CEC blog. Everything works only the RX frequenty on SDR is not the same as on the radio itself. So RX on SDR

Like Jerry said, it’s definitely a frees-up of the arduino. I have the same issue when connecting the arduino to my computer (for cat control) and doing things to fast. Easiest way for you is to

Thanks all for help! The biggest problem was RF getting back into the radio. The dummy was to close to the radio. Have to sort out one more thing, the input for my souncard for digital radio is

Gus, If the display freezes up that means the Nano has gone off the rails for some reason. First, make sure that the 5v supply on the Raduino coming out of the LM7805 is a good solid 5v when it fails.

My uBitx seems to be working after some prior difficulties (that some of you may recall). When I power on the radio, the VFO (as well as the push function on the VFO knob) seems to function properly

Wow, that's impressive! It reminds me of when I first got my Gepetto GPSO <http://www.geppettoelectronics.com/2015/07/gps-disciplined-oscillator-user-guide.html> a couple of years ago, and thought I

Hi Raj Yes, I understand that... but please watch my video https://youtu.be/732ESoul088 or look at the web page that inspired it ( http://dl6gl.de/schlagworte/rf-calibration-generator) ... the

Well Ashar I plugged KL203 and not bad.? Not the best but works.? I need to mod KL203 to expand the power range; on 20m, it was good no issues. Sajid

The WA2EBY amp has been the staple around the bitx community. I am bored with the IRF510s now. I just bought a triplet of 811a tubes. I am mortified at the thought of 1000v dc in the shack...

The AN762-140 should be a good amplifier, I think it was described so in the ARRL 2010 Handbook. It needs lowpass filters like those Communication Concepts sells. It seems not overly complex to build.

Correction. Main board and Radiuno

Only the PCB.

I know Helge and what you say is not true. His RF designs are outstanding still today. His work pioneered matching transformer designs for transistor devices, taking into account many parameters

Tony Most important is to not mess up dc power connection.? do you have a dvm? You can and should verify each connection with the ohmmeter setting. Most important don't make a short circuit between