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Re: Audio gone on new ubitx
Do you still have the lcd working? If so, does the radio work but without sound?? Maybe the ptt is activated....
By César EA3IAV <Cesarleon@...> · #40787 ·
Re: uBITX woes, feeling disheartened. #ubitx
The pin numbering on these relays is inconsistent i.e. reversed in some cases. Either will work OK by taking this into consideration. Mike K5ESS Sent: Tuesday, January 30, 2018 9:36 AM To:
By K5ESS · #40786 ·
Re: Audio gone on new ubitx
Tried another pot ..ran wires from the board..tried head phones...still nothing..not sure what I should check on the audio circuit..
By Erik Hokansson <hokan@...> · #40785 ·
Re: IRF510 amplifier failures
I give up! Maybe this IRF510 failure thing is a non-problem. Someone recently suggested adding a 1K resistor across the antenna connection to limit really high SWR situations. That sounds
By Arv Evans · #40784 ·
Re: Second batch of uBITX shipping? #ubitx
Don't forget the Johnson Smith catalog!!!! 1966's extraordinarily awesome smoke bomb supplier . Well they really were not that good but the waiting was the hardest part.....Steve kb1chu
By Steve Black <kb1chu@...> · #40783 ·
Re: Cheap Harbor Freight Case for MBITX
Wow, ordered on the 15/12 and received via India post. I ordered on the 16/12 and haven't even had a tracking number yet. Fingers crossed the wait won't be too much longer. 73, Ian DJ0HF/G3ULO
By dj0hf · #40782 ·
Re: Audio gone on new ubitx
Solderings on the trimmer? Look for a weak connection on the volume pot
By César EA3IAV <Cesarleon@...> · #40781 ·
Audio gone on new ubitx
Built the kit...audio squealed like when I built the bitx40(which I fixed )..now nothing...any other people have this issue? Suggestions?
By Erik Hokansson <hokan@...> · #40780 ·
Re: Second batch of uBITX shipping? #ubitx
The 6-8 week wait also was in effect in 1980!? (Another memory was having to drive to the nearest FCC facility for taking the tests, which was about an hour - on the interstate - from where I
By Robert D. Bowers · #40779 ·
Re: I did it again.. i plugged the arduino pins on reverse
I have checked continuity? Orange wire and a3 from Nano continuity-> ok And also D7 from nano to the right last pin connector to board> ok also connection from raduino board to main board... i also
By César EA3IAV <Cesarleon@...> · #40778 ·
Re: Second batch of uBITX shipping? #ubitx
Oh wow! I remember this. For both my novice in '63 and my general in '64! tim ab0wr "David Wilcox via Groups.Io" <Djwilcox01@...> wrote:
By Tim Gorman · #40777 ·
Re: IRF510 amplifier failures
Respectfully, current limiting in the final amp is exactly how high-level plate modulation in an old AM transmitter works. Your audio amplifier, which is required to generate a significant amount of
By Tim Gorman · #40776 ·
Re: [SPAM] Re: [BITX20] IRF510 amplifier failures
Even I think that attempting to use 7400 NAND gates as linear devices is a bad idea. As I recall, the author of the article agreed. But a cool project regardless, rather eye-opening to see that it
By Jerry Gaffke · #40775 ·
Re: Bitx Delivered..YAY!!
Mine too : ordered 15-12, it arrived through India Post to day. 73 - Jean F5PCX.
By F5PCX · #40774 ·
Re: MAX9814 mic preamp and DC bias capacitor
So, mic gain control for the win. Thanks Mike! Marco - KG5PRT
By M Garza <mgarza896@...> · #40773 ·
Re: IRF510 amplifier failures
We have thousands of uBitx's and Bitx40's out there now, an occasional post to the forum about? a blown IRF510 is inevitable My opinion is that SWR is not what blows the IRF510's, especially when
By Jerry Gaffke · #40772 ·
Re: MAX9814 mic preamp and DC bias capacitor
I put a 1K to a 2K pot to ground.? Take the output to your capacitor from the wiper. You can adjust all the way to ground (nothing out). 73's Mike, WA6ISP -- Mike Hagen, WA6ISP 10917 Bryant
By Michael Hagen · #40771 ·
Re: Cheap Harbor Freight Case for MBITX
I guess I'm lucky I have access to a water cutter. All I have to do is draw the template and give it to a friend of mine
By Art Howard · #40770 ·
Re: Perfect speaker grill
Hi, as speker grill, I have been using, in some projects, the italian moka coffee espresso spare filters,as the one reported in picture. These are of different sizes, starting from 2 coffee cups up
By Giancarlo - I7SWX · #40769 ·
Re: Inkits India QRP kits
Wish I was more proficient with the programs needed to do all this I certainly would help.
By Art Howard · #40768 ·