Re: Finished v5, gonna smoke test it this evening
Yes, that is correct: both of those wires are unused in the stock (unmodified) build.??
Hope the magic smoke doesn't leak out!
-Ted ?K3RTA
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Integrating NESCAF audio filter
finally got around to building and connecting a Nescaf board to go into the rig.? its dangling outside, but working nicely.? I plan to only add only one knob, the bandwidth control, and keep it on - so it becomes a variable bandwidth control on the front panel that is useful for all modes. ??
the center frequency control is eliminated - I installed a 5k resistor in its place, and adjusted the on-board pot to the sidetone pitch.? When I widen the bandwidth control SSB sounds just fine - meaning one control is enough. the bandwidth adjustment even helps on SSB, and of course a huge help in CW.? (someone might argue that the 700 Hz center filter isn't ideal for SSB - but it sounds fine as integrated with the v4 xtal filter shape).?
the filter adds a LM386 amplifier, so its quite welcome on the v4 to boost the output a bit - its not wired yet to the speaker but it should do better.? the nescaf board has an audio gain adjust, as for outboard use it is intended to allow user to set the board for unity net gain.?
I notice the US based seller New England QRP Club does not have them in stock at present, but worth asking in case there is enough demand to create another batch.? Perhaps other SCAF filters are around - I strongly suggest one that implements bandpass filtering.?
wow this all-analog signal chain uBITX is sounding nice.?
73 Curt
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Re: IRF510 insulation question
#v5
Don,??
I thought I was alone in salvaging heat sinks from other equipment by means of a chain saw or an axe.....
:)?
But seriously, I run about 20V on my finals and see little increase from, say, 19v thru 24V. At least, not statistically-significant enough to warrant the extra amp draw; maybe another watt or two for that volt increase. I'd like to hear of your experience with it & at what point, if you experimented, you saw diminishing returns.??
Better heat sink transfer would help. Aluma-ceramic, you say?? Must do research. Thanks.
73,
Ted K3RTA
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Re: Version 5 ubitx microphone wiring
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Show quoted text
On Wed, Jan 1, 2020, at 3:21 PM, Mark Hansen wrote:
Thanks, Curt!
On Wed, Jan 1, 2020, at 3:14 PM, Curt via Groups.Io wrote:
Mark
as Dean suggests, there is no standard in how commercial microphones are arranged - nor a clear standard in how this 4 pin connector is set up on the uBITX (even in our large local group build LOL). ?
no audio may mean the audio from your microphone doesn't match how you have this 4 pin connector arranged.? since your PTT is working - your PTT and ground connections are correct.? that leaves only 2 pins - so try moving the third wire.? first use your DVM or other continuity checker to ID the PTT and ground wires - then just switch the 3rd wire to the unused pin to see if that works.?
take care on these last steps toward a nice rig
73 Curt
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Re: Version 5 ubitx microphone wiring
toggle quoted message
Show quoted text
On Wed, Jan 1, 2020, at 3:14 PM, Curt via Groups.Io wrote:
Mark
as Dean suggests, there is no standard in how commercial microphones are arranged - nor a clear standard in how this 4 pin connector is set up on the uBITX (even in our large local group build LOL). ?
no audio may mean the audio from your microphone doesn't match how you have this 4 pin connector arranged.? since your PTT is working - your PTT and ground connections are correct.? that leaves only 2 pins - so try moving the third wire.? first use your DVM or other continuity checker to ID the PTT and ground wires - then just switch the 3rd wire to the unused pin to see if that works.?
take care on these last steps toward a nice rig
73 Curt
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Re: IRF510 insulation question
#v5
If Evan says it, recommend you take his advice to the bank.? On the other hand, I didn't insulate the heat sinks under the misguided motivation to maximize heat transfer. Given I Chernobyl'ed my PAs due to "operator error", I got more sensitive to heat (mis) management. Note the big ugly hacked up heat sinks, with no insulation.? Though big and ugly (like my teenage self...), they work like gangbusters. And they should not touch each other (yea, I learned that as well...).? Now, they are just waiting for a probe at ground potential, or a errant wire, or a fat finger, or a stray random unplanned event. Like a time bomb with no expiration date. Then I will regret my choices. I did order some alumina ceramic insulators that have a high heat transfer rates.? So when they come in, I will put them in and lower the risk of smoke and excitement. But for now...we live dangerously...and cool...  Note that with 24V+ to the finals, the big heat sinks, the 40mx40mx20 fan, the rig makes 20 to 30 watts without a fuss. And no spectral complaints. Beyond the kitchen speakers that buzz when the rig hits 80m TX for 2 full minutes doing WSPR duties...I learned how to turn off the kitchen speakers because my WSPR operations are much more important....hahah. Don km4udx
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Re: Version 5 ubitx microphone wiring
Mark
as Dean suggests, there is no standard in how commercial microphones are arranged - nor a clear standard in how this 4 pin connector is set up on the uBITX (even in our large local group build LOL). ?
no audio may mean the audio from your microphone doesn't match how you have this 4 pin connector arranged.? since your PTT is working - your PTT and ground connections are correct.? that leaves only 2 pins - so try moving the third wire.? first use your DVM or other continuity checker to ID the PTT and ground wires - then just switch the 3rd wire to the unused pin to see if that works.?
take care on these last steps toward a nice rig
73 Curt
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Re: Considerations for CAT Control of a V6
Yes, Dean has it exactly right.
Disconnect nothing. Don't. Touch. It.?
Said another way...walk away from the 12v...and walk away from the 5V...
Plug in the CAT when you want it, and unplug when you don't. No need to worry about the 5V into rig from the USB port. Most of us leave the CAT usb plugged in anytime the supporting computer is in the ham shack...or little table in my case.
Simple simple simple....let the uBITX manage all the internal complexities...you plug and play....hahah.? Mind you I did the exact opposite of this, but then I've got too much time on my hands. hahaha.?
Don
km4udx
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Re: Version 5 ubitx microphone wiring
Mark, The wiring on the jack and the wiring on the mic must match.? It differs based on what mic you are using and whether you are wiring it yourself.? Here is how I wired to connect to my Cobra/Uniden mic. ?
MIC Wiring? -
(Cobra / Uniden)
Pin 1???? Shield (ubitx mic ground)
Pin 2???? Mic audio
Pin 3???? Transmit control (PTT)
Pin 4???? Receive control (not connected
Here is a link to some other mic wiring diagrams that might help:
Good luck,
73,
Dean
KK4DAS
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okay got it. the courtesy tone is off, but I can live with that.
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Version 5 ubitx microphone wiring
I have a V5 board in a Nextion case from Sunil. I have good cw output, but nothing on SSB. I noticed that the picture of the mic jack wiring I followed actually has the pins numbered differently than the supplied jack.?  The picture has pins 2 and 3 interchanged from the actual jack. So my brown and black wires are reversed. My PTT works fine, there is some hum and no audio. Should I go ahead and change my wiring to match the photo, or is there an error there? Thanks!
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Finished v5, gonna smoke test it this evening
I just finished my V5, and am going to test it with power this evening, just to see if it will receive.
Hopefully, I got all the wires correct. I know I was supposed to have a purple wire off the Raduino harness hanging free, but it seems I have a red one free on the audio harness too.
Is this correct, or dd I miss something?
--
Alex Netherton, W5ALX
Buncombe County NC, EM85ro
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Re: Flrig and uBitX not connecting
I have my CAT control on my V5 with the CEC firmware working with FLRIG on a windows 10 PC no problem.? (And also WSJT-X, HRD and others)./
Dean
KK4DAS
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Re: Alternatives to Baofeng mic?
Thank you for that inexpensive recommendation!!!? ?I will probably switch to that from what I've been using for projects. Gordon
On Wed, Jan 1, 2020 at 1:18 PM Dean Souleles < dsouleles@...> wrote: I've had a good experience with this Uniden CB mic on my V5.? Consistently good audio reports and have listened to it on websdrs.?
As wired it works with the connector supplied with the case.
Good luck, happy New Year, and 73!
Dean
KK4DAS
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Re: Considerations for CAT Control of a V6
Mike -
Any of the above will work and none of it is necessary.? On my V5 I chose to disconnect the 5V from the USB because so that I could keep the USB permanently connected to the computer without the Arduino powering up each time I turned on the laptop. ? The Arduino will run just fine with USB and the power from the rig simultaneously? It has internal switching logic. ? I use the CEC software and the CAT control works great with HRD, FLDIGI, WSJT-X and anything else I have tried.
Best of luck,
Dean
KK4DAS
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Its there somehow !
With prior versions we press the frequency encoder knob to get into menus.? Might this be a button on screen with v6?? Trying pressing the tuning knob anyway.?
Curt
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Re: Bitx40 ~ New life running FT-8 and WSPR
Before I sold my Bitx40 for a new uBitx V3 I was doing USB and FT8, JT65. I tried winlink as well. All worked out very nicely.?
Joe
KD2NFC
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Re: IRF510 insulation question
#v5
Yes, you will need the mica insulators.? I can speak from experience that the heatsink is at PA potential (i inadvertently sorted one to ground while taking a measurement).? Thankfully only blew the fuse.
73
Evan
AC9TU
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Re: Alternatives to Baofeng mic?
I've had a good experience with this Uniden CB mic on my V5.? Consistently good audio reports and have listened to it on websdrs.?
As wired it works with the connector supplied with the amateurradiokits.in case.
Good luck, happy New Year, and 73!
Dean
KK4DAS
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Re: Bitx40 ~ New life running FT-8 and WSPR
Pete,
Good for you. I figured someone like Pete would do this sooner or later. good use for an old Bitx40.?
73 Kees K5BCQ
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Ted
Alex Netherton