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Date
Re: Building homebrew ubitx: Need pre-v3 schematic PDF. Also, source for 45M15 (45 MHz IF) filter?
It is just that shipping takes 10 dollars from india for a two dollar device. Someone in the USA cam undertake thr shipping. I can send a bunch to someone from here. - f [email protected]> wrote:
By Ashhar Farhan · #51599 ·
Re: CAT Control
HI, I'm running wsjt-x with CAT control of my uBitx on a Raspberry Pi. I simply plugged into the USB port on the Nano from the Pi.? In my case the serial port was /dev/ttyUSB0 and I set the baud rate
By Tom, wb6b · #51598 ·
Re: CAT Control
1. Attach USB cable between ubitx and the computer. Attach two audio cables for mic and speaker between the radio and the comp. 2. Select FT817 as the rig on. Wsjtx. There is a test button on the
By Ashhar Farhan · #51597 ·
Re: K5BCQ kits in BITX40 #bitx40
https://informeddelivery.usps.com/ ? -- www.bitxmap.com ( http://www.bitxmap.com )
By Doug W · #51596 ·
Re: RF power chain mods and improvements..
There's enough examples and docs to learn? LTspice well.?? Its a great tool but as said garbage in garbage out. But the tool can do a good job with a little effort. Pushing bits is often easier
By ajparent1/kb1gmx · #51595 ·
Re: RF power chain mods and improvements..
Before you hang a 50w Amp I'd consider a band pass filter in line before the amp to keep the spurs from being amped up and above the max allowable.?? RX is not terrible but I'e found even at 5W If I
By ajparent1/kb1gmx · #51594 ·
Re: K5BCQ kits in BITX40 #bitx40
I know it might be demanding ;) but it would have been nice if the shipment date was mentioned. Checked earlier this week and saw mine were send, bit so far nothing in the mailbox yet. I know I live
By John · #51593 ·
Re: CW transmit bandwidth #ubitxcw #ubitx
The issue is not with the keyed waveform but an undulating bandwidth change. Using the internal keyer hold the dot paddle (much easier to see than with dashes). The bandwidth starts out properly
By K3OS <garysch69@...> · #51592 ·
Re: Different Encoder
I'm ?going to give the 2 inch a try turn I down a little to smooth it up then put a light knurl on it. Was the 400 ppr you used an optical or capacitive encoder. The atm103-v is capacitive ?and has
By Allen Merrell · #51591 ·
CAT Control
I have updated my uBitx to 4.3 as I would like to use CAT to interface with wsjt-x. I have been unable to find any information on how to set this up. I would appreciate hearing from someone who is
By Dennis · #51590 ·
Re: LM386 Hiss Suppression on the BITX40 #bitx40
There's another possibility, found early on, at low volume levels: too-low resistance from pot. wiper to Earth. Anything from 1k to 10k wiper-to-IC cures it. If you've replaced the (blown?) audio IC
By Dexter N Muir · #51589 ·
Re: Power supply fuses
From power jack to power switch.? From power switch through a 5 amp rectifier to 2 fuses, .5a and 3a.. From fuses to the board.? Reverse polarity protection and no blown fuses. The approximately .7
By Lee · #51588 ·
Re: Different Encoder
Mine's also a 400. 2" should work fine. The knob I made is close to an inch thick. The only reason I had to go with 2.5" was to cover up the window for the channel selector (case is an old CB base
By Vince Vielhaber <vev@...> · #51587 ·
Re: RF power chain mods and improvements..
Today kids probably can't even buy razor blades :-((? Steve kb1chu
By Steve Black <kb1chu@...> · #51586 ·
Re: Power supply fuses
on the 3 pin power plug on the ubitx the middle pin is the pa and the pin to the outside edge is the board power
By Richard E Neese · #51585 ·
Re: Power supply fuses
Be careful, how that PFET thing works is tricky. Several "how I done its" are out on the web with the PFET in the schematic drawn backwards. Here's some old threads on reverse polarity protection,
By Jerry Gaffke · #51584 ·
Re: Different Encoder
Vince How many ppr did the one you used have? I have a piece of 2 inch aluminum bar stock that I was going to turn down for the knob and possibly for the flywheel if it is needed. -- Allen ?Merrell
By Allen Merrell · #51583 ·
Re: Power supply fuses
Surprised someone has not mentioned using a P-channel power MOSFET for reverse polarity protection this low current application. (I think someone has on an older thread that this is re-hashing) You
By Gary Anderson · #51582 ·
Re: uBitx Encoder information needed.
I ordered this as a replacement. Visually it is identical. Works well with...too. *Order Details* Your salesorder number is 54975240. *Details* *Available Quantity* *Backorder Quantity* *UnitPrice*
By Mike aka KC2WVB <rb5363@...> · #51581 ·
THANK YOU K5BCQ
THANK YOU KEES K5BCQ for your wonderful service to the uBITX community. Mike N6CMY
By Mharpen@... · #51580 ·