I¡¯m going to try the Cirrus Logic WM8510 Codec. I¡¯ll try using for both input and output, uses Ic2 for control. Since I¡¯m using the PB version of the ATMega 328 it has two ic2, two, spi, two uarts in same footprint as standard 328.
If I get it working I¡¯ll let everyone know.
James Lawrie
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On Jan 9, 2018, at 14:10, John Sutter <jds@...> wrote:
I've been thinking of making an Audio/Interface PCB for the BITX40/uBITX.
What would be good to have on it?
Microphone Speech Processor: Jeff Cummings's design using the SSM2167
AGC: Which is the current favorite?
What else?
Easy-Digi circuit if I can get permission or a footprint for the module(?)
?
I'm thinking of releasing the Gerber files and let folks get their own boards
made. AllPCB's price went up to $2.10 per board for 100x100mm.
--
John Sutter
W1JDS CM87xi
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Re: My ?BITX in its new home
Use a heat gun to soften the glue, should come off then.
James Lawrie
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On Jan 9, 2018, at 17:35, Keith VE7GDH <ve7gdh@...> wrote:
Jack W8TEE wrote...
However, even the 3mm knob I have seems wobbly...
it may not actually be metric, but a 1/8" knob. Again, I'm still waiting for my uBITXs to show up. The
shaft diameter on the knob I picked up for my BITX40 was
too large even though it was the size specified. I wish
I had thought about heat-shrink back then. I ended up
putting a squirt of hot-melt glue in the knob before
putting it on the volume control shaft. It will be
interesting if I ever have to remove it!
--
73 Keith VE7GDH
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Audible pickup of outside noises on speaker line?
#ubitx
Hello everyone, I've got my uBitx setup & hooked up to a 40m dipole I've sort of strung along the ceiling of my 1 bedroom apartment; it's not ideal at all, and the coax is not rg59 albeit short. Long story short, still unlicensed, waiting to take the exam this spring. Anyhow, on to the issue at hand. I have wired up some speakers which works but the audio is simply terrible, no bass to speak of at all. Alternatively, I have the speaker jack also wired up and I notice I can hear myself tapping on the table or touching the casing / near the components. Is this simply lack of good shielding of the mic input or speaker assembly?  This picture is not the latest "revision" of my "work", since I have shortened down the coax running (rg59) so it no longer is bent and rewired the rotary encoder due to it being inverted. Now, a few issues: 1. Noise floor is high and reception is poor. Compared to my CountyComm GP-5 SSB radio where with a little whip antenna I can receive clear audio but can barely hear anything on the uBitx, even with speakers. Granted, the GP-5 has amazing AGC, serious DSP and all, so there's that. I tried running the uBitx off 12v batteries but had no drop in noise floor. I disconnected all electronics in my basement apartment but no audible difference in noise floor. Could this be attributed to poor / non existent shielding? Is my front end poor? I accidentally transmitted without an antenna hooked up when not wiring up the pull up resistor for the keyer.. Any advice is appreciated. I'm incredibly new to this side of electronics.
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Re: #ubitx Re: Ubitx only on preorder now
#ubitx
Hi Ashhar,
Are you planning to offer the amazing uBitX as "Kit Form" or just the PCB ??
I got into Ham for the Sheer joy of Home brewing and would love to build the TRx by myself, one Coil at a time ?? I have build a NR60 in class 9th from scratch including Screen printing /etching? PCBs and winding all the coils and look forward for similar challenge building your latest creation!?
?
73's?
Ujjwal??
?
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Try to mount the external headphones Jack, insulating its bodyfrom ground.
?Ther place a 50 ohm resistor from ground to the ccommon of the jack, instead of directly grounding, it. This method helps reduce damage to ears. Most radios dothe same. All the best
On Wed, Jan 10, 2018 at 10:37 AM, Mike Woods <mhwoods@...> wrote: Ashhar
I completed mod today and it worked on internal speaker of uBitx going from TX to RX.? Could still hear a brief squeal on transition when I plugged into an amplified speaker.
It¡¯s an improvement so the capacitor stays (470uF).
Thanks for the tip, and 73
Mike ZL1AXG On Wed, 10 Jan 2018 at 2:37 PM, Ashhar Farhan < farhanbox@...> wrote: yes the +ve goes towards the audio preamp side. - f
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Ashhar
I completed mod today and it worked on internal speaker of uBitx going from TX to RX.? Could still hear a brief squeal on transition when I plugged into an amplified speaker.
It¡¯s an improvement so the capacitor stays (470uF).
Thanks for the tip, and 73
Mike ZL1AXG
On Wed, 10 Jan 2018 at 2:37 PM, Ashhar Farhan < farhanbox@...> wrote: yes the +ve goes towards the audio preamp side. - f
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The kapton tape worked.
--
73, Yvon NU6I
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I was planning on putting in an electret element. Also I thought the double Jack Arrangement might lend itself to being useful with a rigblaster for digital.
On 9 Jan 2018 9:54 pm, "Raj vu2zap" < rajendrakumargg@...> wrote:
If you find any older model HT or VHF speaker mic cheap - those will have
condensor mic due to space
occupied by the speaker.
Raj
At 09/01/2018, you wrote:
So commercial microphones vary
in their schematics, but if you look it up and figure out how to get most
closely to the electret part it should work fine.?? Some and
some radio frequency bypassing circuitry, and some adid some audio
filtering.
Sent from my iPhone
On Jan 9, 2018, at 09:56, Art Howard
<k0kuk.vhf@...>
wrote:
I intend to set mine up with an
HT speaker mic connector and play with a few of those to see how they
work
Art
K0KUK
On 9 Jan 2018 8:39 am, "Craig Wadsworth"
<cwadsworth@...
> wrote:
- Has anyone tried a Yaesu (Vertex Standard) MH-31 microphone with the
uBitX or BitX40?? Work well?? Smoke? Other?
- Thanks,
- Craig
- w9ctw
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Re: Digitally Controllable Heathkit Vacuum Tube Radio
So does Mike Hagen in this very group!
Vince.
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On 01/09/2018 10:53 PM, freefuel@... wrote: if you want 8 outputs this vendor has a board with the 8 output version
of the Si5351A chip
installed,
-Justin N2TOH
--
Michigan VHF Corp.
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Re: Digitally Controllable Heathkit Vacuum Tube Radio
On Tue, Dec 5, 2017 at 06:37 pm, Gordon Gibby wrote:
Howdy Gordon,
may I ask where your injecting your heterodyne signal from the Si5351a into the SB-100?? my guess would be at the common connector on the band switch, is this correct? if that is the case I had considered altering one of the wafer sections to indicate the band position, or perhaps adding a sensor to the shaft for that purpose. another wafer switch maybe with a resistor ladder??
-Justin N2TOH -Justin N2TOH
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If you find any older model HT or VHF speaker mic cheap - those will have
condensor mic due to space
occupied by the speaker.
Raj
At 09/01/2018, you wrote:
toggle quoted message
Show quoted text
So commercial microphones vary
in their schematics, but if you look it up and figure out how to get most
closely to the electret part it should work fine.?? Some and
some radio frequency bypassing circuitry, and some adid some audio
filtering.
Sent from my iPhone
On Jan 9, 2018, at 09:56, Art Howard
<k0kuk.vhf@...>
wrote:
I intend to set mine up with an
HT speaker mic connector and play with a few of those to see how they
work
Art
K0KUK
On 9 Jan 2018 8:39 am, "Craig Wadsworth"
<cwadsworth@...
> wrote:
- Has anyone tried a Yaesu (Vertex Standard) MH-31 microphone with the
uBitX or BitX40?? Work well?? Smoke? Other?
- Thanks,
- Craig
- w9ctw
|
Re: Digitally Controllable Heathkit Vacuum Tube Radio
if you want 8 outputs this vendor has a board with the 8 output version of the Si5351A chip installed,?
-Justin N2TOH?
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the isolation is for both..it was a hard lesson learned at field day one year..hi hi..but you want to keep any electrical connections seperate otherwise your either injecting noise into the radio or RF back to the computer..floating grounds can be a problem too..not all grounds are equal.
Brian K9WIS
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neil, the trouble with having different downloads is that if you use one, you will lose the functionality of another! with git, you will be able to pull whatever changes you need into one build. the unfortunate trouble with git is that no one has written a simple one page how-to for hams. perhaps, allard can take a stab at it? - f
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can you hook up an rf probe? we can trace this with the probe. - f
On 9 Jan 2018 6:41 am, "Dave Bottom" < ars.kd6az@...> wrote: Mike, RE your BITX40.
If you are using an Electret Mic.? Do you have voltage across the Mic element.? If no Mic BIAS, there will be no output.?? On the uBITX there is a 4.7K ohm resistor from 12V line to the Mic element Mic+ side (they are polarized), Mic- to Ground, as this powers the FET inside the Electret Mic.
Dave WI6R
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yes the +ve goes towards the audio preamp side. - f
On 10 Jan 2018 6:14 am, "KD8CGH" < rkayakr@...> wrote: Am I correct that the suggestion is to take a leaded 470 uf electrolytic capacitor and attach it over surface mount C50 with the + side facing the trace to R50?
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Am I correct that the suggestion is to take a leaded 470 uf electrolytic capacitor and attach it over surface mount C50 with the + side facing the trace to R50?
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Re: Digitally Controllable Heathkit Vacuum Tube Radio
Jack, don't forget the QRP-LABS kits can be used with a GPS receiver to calibrate the Si5351a chip. I had been thinking about using the Si5351A with my Heathkit SB-101 but it seems you guys beat me to it!? so things I want to explore myself when the time comes.?
1) sweeping the filters to find the sweet spots, so adjustments can be made to all the oscillators for peak performance. (this might even be employed per filter as tweeking the VFO,BFO, and heterodyne settings should be trivial)
2) trying low side injection to see if maybe 4 meters or perhaps 6 meters can be reached.?
3) designing and laying out a new audio board with a Class D solid state driver stage for the speaker and replacing the combination triode/pentode tube with something a little easier to find.?
-Justin N2TOH?
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>? Is the isolation for the protection of the computer, radio or both?
Both, to some degree. From what I know, it's more about preventing ground loops which produces a hum
On Tue, Jan 9, 2018 at 6:50 PM Kerry via Groups.Io <write2kerry= [email protected]> wrote: Thanks all for all the help, links and tips.? Much to digest and much to learn.
73,
Kerry
--
David K4DBZ
Unofficial bitx chatroom:?https://discord.gg/CrHvWFc
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Thanks all for all the help, links and tips.? Much to digest and much to learn.
73,
Kerry
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James Lawrie
VU3ECN
Art Howard
Raj vu2zap
Bob Benedict, KD8CGH