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
·
|