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Date
Re: Transmitter Mods
Any thoughts if these mods will hold if we switch irfs to?RD16HHF1?
By Sajid Rahum · #50731 ·
Re: Oscillation problems Bitx20a
Thank you all for your replies, I appreciate it very much. Yes, dead-bug-style means keeping short leads and I managed to do that. I started this project November last year and took my time building
By Fokko PH0KKO · #50730 ·
Re: Transmitter Mods
Thank you very much Howard & Rowland for speedy reply.?? For R86, do i solder off one end (example below, #2) , lift it up gently?? Solder one side to 33uH/27uH inductor to the R86 removed corner
By Sajid Rahum · #50729 ·
Re: Need help understanding a line of code in ubitx_si5351.cpp (msxp2 = ...) #radiuno
OK, a few more words about what's going on inside the si5351. Perhaps more than you really want to hear. Assume you are tuned into a CW station at 7.1mhz. We have a? single conversion superhet such
By Jerry Gaffke · #50728 ·
Re: The new uBITX boards are here
?Well I'll be doggoned --- I found BOTH those transistors at mouser. Tonight I'll order some. This is starting to get INTERESTING. Gordon ________________________________ Sent: Tuesday, May 29, 2018
By Gordon Gibby <ggibby@...> · #50727 ·
Re: The new uBITX boards are here
What did I say about using a high FT transistor? Since I don't have KST10s but know the MPSH10s and you say its the same save for package my first shot would be go for it, can't be worse.? MPSH10s
By ajparent1/kb1gmx · #50726 ·
Re: ardurino tutorials and books
You said: "It is apparent that you do not feel this is an honest mistake because you have given yourself the boot in the pants to leave," But he said: "I submitted this site for info and help for hams
By Vince Vielhaber <vev@...> · #50725 ·
Re: ardurino tutorials and books
Like what? Terry - KB8AMZ
By Terry Morris · #50724 ·
Re: The new uBITX boards are here
Allison, How about using KST10s for Q10/20? Same as the MPSH10, but surface mount. Just a suggestion. Marco - KG5PRT
By M Garza <mgarza896@...> · #50723 ·
Re: Receive FM Radio Station #bitx40
Just a wild guess.... There is enough pickup die to leads to hear the station at the input of the 45mhz mixer and? its second harmonic 90mhz plus DBMs make very good phase detectors (that means they
By ajparent1/kb1gmx · #50722 ·
bitx40
Hi need help with the wiring of a bitx40 got to the part where you do the 8 pin on the raddduino board but then it said ti hook up the 5 pin connector?to the board don't bknow if I got the wrong?
By rozanski@... · #50721 ·
Re: ardurino tutorials and books
Terry, you read things in his post that I certainly didn't. Vince.
By Vince Vielhaber <vev@...> · #50720 ·
Re: Need help understanding a line of code in ubitx_si5351.cpp (msxp2 = ...) #radiuno
Thanks for your response Jerry, but I am still snowballed. Like I took the Extra Class License class the second time around with the same instructor, Jim Wilson, AC8NT. Jim is a scholarly guy with
By Terry Morris · #50719 ·
Re: ND6T AGC implementation for uBIT-X
Thank you Kees.? Envelope arrived in Vermont this afternoon safe and sound. 73 de Vince N1VIN
By V Zecchinelli <n1vin@...> · #50718 ·
Re: ardurino tutorials and books
David Todd, You are way overboard on your decision to leave the group. If that is your decision, then by all means leave. No one in this group told you to leave or asked you to leave. You decided,
By Terry Morris · #50717 ·
Re: The new uBITX boards are here
Jerry, The problem is the input impedance is the aggregate of the Miller and fixed (gate capacitance). That means two things, it changes with voltage and power out (voltage swing at the drain) and
By ajparent1/kb1gmx · #50716 ·
Re: Receive FM Radio Station #bitx40
Sorry, I forgot you probably had yet to tune the IF section. It did not dawn on me that might be the issue. I have not scratch built SSB radios with IF sections but I did build one AM receiver which
By Mike aka KC2WVB <rb5363@...> · #50715 ·
Re: Ideas for AM, NB FM Demod and CW filter board
Agree with Allison. If what you want is a FM monitor receiver, then design and build something specifically for that purpose. If you want an AM General Coverage receiver, then build one specifically
By Arv Evans · #50714 ·
Re: Ideas for AM, NB FM Demod and CW filter board
Alison ! Your reference to TDA7000 got me thinking how about a filter and ZN414 clone MK484 available from China. Appears nice simple a typical uBitx like solution. I still have some marine radios
By lkorahul · #50713 ·
Re: The new uBITX boards are here
Farhan, Look the traces for the final to the output transformer.? Make them wide (low impedance). same for the gate.? The interaction between the mosfets and the drivers is both closeness the three
By ajparent1/kb1gmx · #50712 ·