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Re: BITx 40 Frequency lock during transmit
David :
You did remember to install the 0.1 uF disc cap across the tuning pot (where the yellow and violet wires attach) ?
Michael VE3WMB
P.S. I do also recommend upgrading the Raduino to use
David :
You did remember to install the 0.1 uF disc cap across the tuning pot (where the yellow and violet wires attach) ?
Michael VE3WMB
P.S. I do also recommend upgrading the Raduino to use
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By
Michael Babineau
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#41655
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Re: Lost audio from receiver
I think you're right, probably blew the LM386.
And nothing else.
Clipping leads and just leaving them in place sounds fine, or could
heat them up and pull them out one by one using soldering iron and
I think you're right, probably blew the LM386.
And nothing else.
Clipping leads and just leaving them in place sounds fine, or could
heat them up and pull them out one by one using soldering iron and
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By
Jerry Gaffke
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#41656
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Re: Blue display, white digits
That particular vendor has different sizes and orientations of the 1602 displays - even in the same color, be it black on white, white on black, white on blue, ...
As to I2C, I searched for those and
That particular vendor has different sizes and orientations of the 1602 displays - even in the same color, be it black on white, white on black, white on blue, ...
As to I2C, I searched for those and
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By
Vince Vielhaber
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#41657
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Re: uBITX woes, feeling disheartened.
#ubitx
ok how about these readings; K1 Rec. pin1=0volts pin3=12volts pin5=12 volts pin =8 12 volts pin9=12 volts pin12=0volts pin14=0volts pin16=0 volts
ok how about these readings; K1 Rec. pin1=0volts pin3=12volts pin5=12 volts pin =8 12 volts pin9=12 volts pin12=0volts pin14=0volts pin16=0 volts
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By
rlawson695@...
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#41658
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Re: Bitx40 - receiver works great, but do not transmit
#bitx40help
Good advice, build a diode RF probe.
A germanium diode such as the 1n34a or 1n60 works well, but they are expensive now and hard to get.
A schottky diode (such as the Bat54s used on the Bitx40 diode
Good advice, build a diode RF probe.
A germanium diode such as the 1n34a or 1n60 works well, but they are expensive now and hard to get.
A schottky diode (such as the Bat54s used on the Bitx40 diode
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By
Jerry Gaffke
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#41659
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Re: No power increase with higher voltage?
HI Vic,
Interesting observations.... I am having a similar issue with my uBITX and a booster, Ill try the 24v battery solution....
73. Nik
HI Vic,
Interesting observations.... I am having a similar issue with my uBITX and a booster, Ill try the 24v battery solution....
73. Nik
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By
Nick VK4PP
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#41660
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Re: No power increase with higher voltage?
Well, gentlemen, we have a true ham here.
If RF is getting back into your booster and changing the output voltage,
there are 2 solutions; either block the RF with a filter (and shielding),
or change
Well, gentlemen, we have a true ham here.
If RF is getting back into your booster and changing the output voltage,
there are 2 solutions; either block the RF with a filter (and shielding),
or change
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By
John Backo
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#41661
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Re: Blown by nearby transceiver
#bitx40help
Hey Jerry, I’ve had strange things like his happen to me with other equipment when transmitting even with a little Power like the bitx40. I’ve zapped the inductors on a SpyVerter and SV1AFN
Hey Jerry, I’ve had strange things like his happen to me with other equipment when transmitting even with a little Power like the bitx40. I’ve zapped the inductors on a SpyVerter and SV1AFN
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By
Joe Puma
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#41662
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Re: Tinny sounding electric miss on uBitx
Mike, Bill is probably right,
Check and adjust your BFO first. That is
almost always the reason for poor voice quality,
especially since others are using the more or
less the same setup and not
Mike, Bill is probably right,
Check and adjust your BFO first. That is
almost always the reason for poor voice quality,
especially since others are using the more or
less the same setup and not
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By
John Backo
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#41663
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Re: Bitx40 - receiver works great, but do not transmit
#bitx40help
I’m waiting for this to come in the mail
I’m waiting for this to come in the mail
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By
Joe Puma
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#41664
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Re: Tinny sounding electric miss on uBitx
Oops -- I noticed you said "tinny when
monitoring in another receiver..."
That would rule out the BFO in YOUR receiver.
It could be the voice quality of your mic amplifier.
There have been various
Oops -- I noticed you said "tinny when
monitoring in another receiver..."
That would rule out the BFO in YOUR receiver.
It could be the voice quality of your mic amplifier.
There have been various
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By
John Backo
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#41665
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Re: Bitx40 - receiver works great, but do not transmit
#bitx40help
That's looks great if you want a high impedance probe for your oscilloscope or spectrum analyzer.
RF goes in, bigger RF at the same frequency goes out
But that is not a suitable RF probe for a DVM,
That's looks great if you want a high impedance probe for your oscilloscope or spectrum analyzer.
RF goes in, bigger RF at the same frequency goes out
But that is not a suitable RF probe for a DVM,
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By
Jerry Gaffke
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#41666
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Re: Tinny sounding electric miss on uBitx
Transmit and receive are symetrical on the uBitx and Bitx40, uses the same bfo and IF filter.
Should have about the same audio characteristics on transmit as receive.
Assume the crystal filter has a
Transmit and receive are symetrical on the uBitx and Bitx40, uses the same bfo and IF filter.
Should have about the same audio characteristics on transmit as receive.
Assume the crystal filter has a
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By
Jerry Gaffke
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#41667
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Re: Tinny sounding electric miss on uBitx
< would be between 100 and 3000 hz, and perhaps sound a bit tinny
Should be:
> would be between 1000 and 3000 hz, and perhaps sound a bit tinny
< would be between 100 and 3000 hz, and perhaps sound a bit tinny
Should be:
> would be between 1000 and 3000 hz, and perhaps sound a bit tinny
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By
Jerry Gaffke
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#41668
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Re: Bitx40 - receiver works great, but do not transmit
#bitx40help
Hmmm I didnt know this lol. I wanted to measure something with a RF millivolt meter that measures 8v? So I saw that it can output a signal greater then 8v so I thought it had the range I was looking
Hmmm I didnt know this lol. I wanted to measure something with a RF millivolt meter that measures 8v? So I saw that it can output a signal greater then 8v so I thought it had the range I was looking
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By
Joe Puma
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#41669
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Re: Blown by nearby transceiver
#bitx40help
Something like an airwound solenoid inductor will indeed pick up nearby RF
through magnetic coupling, perhaps enough to burn traces.
I'd be surprised if a toroid could do that, at least with the
Something like an airwound solenoid inductor will indeed pick up nearby RF
through magnetic coupling, perhaps enough to burn traces.
I'd be surprised if a toroid could do that, at least with the
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By
Jerry Gaffke
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#41670
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Re: What firmware do you suggest for uBitx???
Jack, I agree, the rig should be working before you do any software "mods".
If your writing your own, then, of course, change one thing at a time.
If you like most of us, not writing your own, then
Jack, I agree, the rig should be working before you do any software "mods".
If your writing your own, then, of course, change one thing at a time.
If you like most of us, not writing your own, then
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By
Michael Shreeve
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#41671
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Re: Tinny sounding electric miss on uBitx
I experienced similar tinny mic audio issues. I had not realized the BFO affects both.
After figuring out the BFO tx /rx relationship, I now just transmit and listen to my audio when
I experienced similar tinny mic audio issues. I had not realized the BFO affects both.
After figuring out the BFO tx /rx relationship, I now just transmit and listen to my audio when
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By
Joe
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#41672
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Re: BITX QSO Afternoon/Night, Sunday, February 11, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere
Called CQ for a half hour this evening. Nothing but noise!
--
John - WA2FZW
Called CQ for a half hour this evening. Nothing but noise!
--
John - WA2FZW
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By
John P
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#41673
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Re: uBITX woes, feeling disheartened.
#ubitx
make that K1 Rec. pin3=0 volts sorry 73's de AC8XZ
make that K1 Rec. pin3=0 volts sorry 73's de AC8XZ
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By
rlawson695@...
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#41674
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