¿ªÔÆÌåÓý

Date
Re: New Group Specifically for "Homebrew Test Equipment"
I think an si5351 breakout board, a resistor network to combine two channels (some will want all three), and a Nano with LCD and rotary encoder to program the si5351 with is about all you want. Could
By Jerry Gaffke · #57772 ·
Re: Need New Raduino Board
I got a replacement Raduino board for? $35 US sent via DHL from HF Signals, which I plan on keeping as a spare. I managed to replace the Nano on my original Raduino board , not too difficult and
By Malcolm <ei8fh@...> · #57771 ·
Re: New Group Specifically for "Homebrew Test Equipment"
Depends on what you mean by SSB modulation. Jerry, KE7ER Hmmm .. Twas just a hair-brained thought .. Two-tone test for sure ubitx stripped of all rx cruft.. everything past t10 or so on xmit side
By jim <ab7vf@...> · #57770 ·
Re: Odd FT8 transmit behavior #ubitx-help
You may be hearing a carrier because your receiver is very close to the ubitx. Mine has a carrier but it is down about 40 db or so from the signal . I am thinking I measured about 1 milliwatt of
By Ralph Mowery · #57769 ·
Re: Odd FT8 transmit behavior #ubitx-help
I have overdriven the power chain by having the slider in wsjt-x up too high, resulting in the need to replace components. That¡¯s why I was asking where the drive level was set to, as well as
By Sean W7SKD · #57768 ·
Re: Odd FT8 transmit behavior #ubitx-help
I'll check on the wsjt-x slider position tonight (already tried various sound driver slider positions, not the wsjt-x one, however).? We have not fully checked out the radio with SSB voice until
By Mike KK7ER · #57767 ·
Re: Fried irf510s replaced but
Are you sure you have the RF out ground and hot connected properly? Allison
By ajparent1/kb1gmx · #57766 ·
Re: Q90 fried
Dennis, you are correct. For many uses the 2n2222/DXT2222 are interchangeable or improved replacement. Allison
By ajparent1/kb1gmx · #57765 ·
Re: Homebrew from scratch #ubitx
Peter, Nice looking build.? I wonder with a different layout if it performs better. Allison
By ajparent1/kb1gmx · #57764 ·
Re: Thanks for the community and Mr. Bill Cromwell in particular...and check this 20m DX FT8 range #ubitx-help #ft8
Very nice. So I manually uploaded my little WSJT-X log to qrz.com.? That worked!? Is there a way to automate the WSJT-X interface to qrz.com? And to complicate, I've installed jtxalert, and it wants
By Don - KM4UDX · #57763 ·
Re: Homebrew from scratch #ubitx
Would also try to adopt a modular system , but when stacking the modules any adjustable components should then still be accessible from one of the edges of the relevant module board.? Hence a
By Frank Dinger , EI7KS · #57762 ·
Re: New Group Specifically for "Homebrew Test Equipment"
Depends on what you mean by SSB modulation. If all you want is is the same effect as an SSB transmitter with a 1khz tone into the mike, most any RF source can do that.? As in any CW transmitter, or
By Jerry Gaffke · #57761 ·
Re: Thanks for the community and Mr. Bill Cromwell in particular...and check this 20m DX FT8 range #ubitx-help #ft8
That is a great start with ft8. Here is the qrz log of what I have worked with my ubitx.
By _Dave_ AD0B · #57760 ·
Re: New Group Specifically for "Homebrew Test Equipment"
I would prefer that it remain here to avoid "fragmentation" ...one stop shopping The software guys seem to be able to ignore most of the hardware discussion ...as I do most of the software and or
By Jim Tibbits · #57759 ·
Re: Q90 fried
-- 2222a Nd 3904 are interchangeable but in my mind, the 2222 is a better grade... not sure I can back that up factually. 72 and God bless KD4EPG
By Dennis Yancey · #57758 ·
Re: ?B K1 Relay, RF Side
By jim <ab7vf@...> · #57757 ·
Re: ?B K1 Relay, RF Side
I am looking at N5ESE's Classic RF Probe page. He uses a 0.01 ?F cap and a 1N34A diode. Are?the cap value and diode type critical? Thanks!
By Arvo W0VRA · #57756 ·
Re: Fried irf510s replaced but
Progress I think.? Replaced the 1-AM smd with a 2n3904 and have side tone back (thanks Conrad) but the display has gone off showing black boxes across the top and gibberish when I key.? It had been
By jfein2000@... · #57755 ·
Re: Fried irf510s replaced but
When I sow the bottom of the heatsinks were almost touching the board I removed just a piece 1-2mm of the heatsinks. Just to be sure they could not touch the board.
By iz oos · #57754 ·
Re: Fried irf510s replaced but
Thank you Marco,? I worked that out by using a USB microscope to see the number stamped on the component and found out it was a version of the 2n3904.? I have some spare 2n3904s and might give it a
By jfein2000@... · #57753 ·