Hi Ravi: Thanks! I still have my original K&R which I bought new in the 1970's for $8! The whole reason for writing the C Programming Guide (1982) was because I thought C had great potential, but the

Jack, Thank you for all that you do for the Ham Radio community. Much of the world today is working with Software Defined something; be it radio or networks. While I have had the good fortune to

Clark, Thanks! I'm going to file that under, "Duh... why didn't I think of that..." I suspect I won't be able to source the exact part, but I see the parameters printed on the tops of the relays, so

Bob N1KPR Using a switch to connect to either dummy load or antenna is a good idea. It should help eliminate errors where the rig is not connected to anything. Arv K7HKL _._

Considering the almost ubiquitous presence of microprocessors in amateur radio, and the presence of the Raduino in the more recent versions of BitX, I cannot understand why something as

1920's era transmitter design. https://www.qsl.net/wd4nka/TEXTS/MOPAf.HTM _._

Labeled image here: https://groups.io/g/BITX20/message/74410?p=,,,20,0,0,0::Created,,kb3t,20,2,0,69399212 - Bill N3AJ (former KB3T)

Hi Evan: Thanks for taking the time to write and the kind words...they are appreciated. I can say that our editors at the ARRL have told me that they expect the Projects book to be printed on Sept.

Jack, My vote would be to continue to post your messages, as one of the most posted problems (outside of the audio input and receiver sensitivity issues) is on how to upgrade the microcontroller in

I'm using a chassis mounted dummy load which is selected via a toggle switch. This is handy for adjusting the SWR and Power meters. Then when I switch to the antenna I can see the real SWR and power

All: I knew that there would be some objections to my post about my new book, which is why I put the warning in the tag line. Truthfully, there were a number of people who knew I was working on it and

Hi Barry, That single tube transmitter is known as a power oscillator and is not a MOPA design. It is useful in defining anything to point out what it is not. The example with the buffer/muliplier IS

A one tube transmitter with a single 6146 was a popular design in the early 1960s. Barry

Has anyone integrated uBitx V6 board with the kit from https://amateurradiokits.in/. Since the power /volume control, ptt, audio out and cw key along with Antenna connectors are soldered on the board

MOPA = Master Oscillator (MO) Power Amplifier (PA) System MOPA system ... On Sunday, August 23, 2020, 2:02:49 AM EDT, s53c.lado@...

I have a V4 and use and entirely different AGC system, so I can't help directly. There was at least one instance of that AGC board not working, which may have been due to a failed component, and an

We used 0A3/VR75 or 0B3 type of tubes not OA79 (typo).. At 23/08/2020, you wrote:

Lado, If you search using the term 'MOPA ham radio' you will get much better results to explain MOPA. And I agree with everyone else in that there is a lot of crossover between micro processors,

Lado, MOPA refers to a simple transmitter design that had a MASTER OSCILLATOR (MO) followed by a POWER AMPLIFIER (PA). Very often these were tubes like the 12BY7 as the oscillator followed by a beer

I apologize to reply to your message with an off topic question. Since English (American) is not my native language, I sometimes don't understand some references. I can relate to your mention of both