Date   
wiring harnesses

Richard E Neese
 

anyone know where to get replacement wiring harnesses for the bitx 40? I need a few.

Re: Replacing the Rotary Encoder #ubitx

Michael Hagen
 

Yes that usually a good one.  If the bushing is not threaded, you have to mount with standoffs.

I had a connector on each end of its cable.  The encoder end not polarized.  So I shrunk wrapped soldered wires on the

encoder connector because it was not polarized.  Now the cable is attached with a Molex at the other end.

That's a problem with DuPont jumpers.

 

73's

Mike, WA6ISP


On 2/20/2018 8:42 AM, John Kemker wrote:
My junque box has a Keyes rotary encoder mounted on a small PCB with DuPont compatible header attached.  On the back are two 10k SMD resistors.  I like the Keyes better because it has detents when you spin it.  Should I be able to directly replace the stock encoder with it?  It, too, has a center-push switch.  Five lines out:  CLK, DT, SW, +, SW.
--

73 de W5NNH

-- 
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID  "MotDog@..."
Mike@...

Re: Connectors

Michael Hagen
 

Yes, BUT Pins are 3 Cents, 4 at Mouser.  $.07 for the connector, $.28 for pins!

Tayda is the Place for Connectors!

Mike, WA6ISP


On 2/20/2018 8:12 AM, Mike Yancey wrote:

I keep a (nearly) full set of those - buy them on Tayda and you'll laugh at your shopping cart on checkout: 475 pieces... Total cost, probably $11.

They're really useful, though - I use them on proto-board projects all the time. Just really easy to keep power wired polarized, connect & disconnect quickly,
clean & tidy.

Mike Yancey, KM5Z
Dallas, Texas


-- 
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID  "MotDog@..."
Mike@...

Re: My uBitx shipped today

at91r40008
 

Just received a notification form PayPal with DHL tracking number.
Shipped today and expected delivery Thursday 2/22.
My order was on 12/15/17.
Fortunately I was able to buy one  shortly after from an OM that changed his mind.
It was still in the unopened box and I have been playing since.
--
73, Yvon NU6I

Re: Variable power control

Walter
 

Would a 5amp adjustable boost supply be enough current?

And Thank you for your help.  It is greatly appreciated.

73

Re: rv2- messed up setting and txing like mad!!!

Jerry Gaffke
 

Said:  Hopefully, the rig is not receiving.
Should read:   , Hopefully, the rig is now receiving.


On Tue, Feb 20, 2018 at 08:16 am, Jerry Gaffke wrote:
Hopefully, the rig is not receiving.

Re: Replacing the Rotary Encoder #ubitx

John Kemker
 

Arrgh!  The last should not be SW, but GND.

--

73 de W5NNH

Replacing the Rotary Encoder #ubitx

John Kemker
 

My junque box has a Keyes rotary encoder mounted on a small PCB with DuPont compatible header attached.  On the back are two 10k SMD resistors.  I like the Keyes better because it has detents when you spin it.  Should I be able to directly replace the stock encoder with it?  It, too, has a center-push switch.  Five lines out:  CLK, DT, SW, +, SW.
--

73 de W5NNH

Re: uBITIX Shipped

N5YFA
 

"uBITX  ordered on 12-25-2017, received PayPal notice of item being shipped 2/20/2018, with DHL tracking number to US.  Expected delivery on Thursday 2-22 [...]."

Same here.

Re: My uBitx shipped today

Dennis Voorhees
 

Curios John, do you know when it shipped? I assume DHL. Mine is en-route, Was it delivered by DHL or some other courier service?


On Tue, Feb 20, 2018 at 11:28 AM, John Kemker <kemkerj3@...> wrote:
Ordered 21 December 2017, arrived today!
--

73 de W5NNH


Re: My uBitx shipped today

John Kemker
 

Ordered 21 December 2017, arrived today!
--

73 de W5NNH

Re: Raduino Replacemnt, COMING SOON!

KD8CGH
 

Nik
  I would like 2 of the #3 raduinos and two of the #2 HPFs
    Thanks
        Bob   kD8CGH

Re: rv2- messed up setting and txing like mad!!!

Jerry Gaffke
 

Good advice.   Yes, check the power supply voltage into the board.

But I would guess that after twiddling RV2 and RV3, the IRF510's are sucking too much current on transmit,
and so bring your power supply to its knees. 

I would suggest that you remove power from the IRF510 drains by not supplying 12v to the PA-PWR pin 
(the middle pin of the three pin power connector). 
Leave it unconnected till you have the receiver working again.
Also turn RV2 and RV3 fully clockwise for minimum (zero) drain current.  (Backwards of most knobs in this world)
RV1 should probably be about mid-range, determines how much drive the final transmit amplifier gets.


Find K1, which is the relay nearest the 3 pin P1 power connector near the left back corner of the board.
Find K1 pin 1, has the square pad on the bottom of the board, furthest from the board corner,
this is the TX 12v power rail, it will only have 12v when the rig is trying to transmit.
So your first debug step is to verify that K1-1 is zero volts when you power up the rig,
if it is 12v then the rig thinks it is transmitting, perhaps because of an issue with that 4.7k resistor.

Hopefully, the rig is not receiving.
Current draw should be around 150ma into the rig from the 12v supply.

Now re-attach the middle pin of P1 to 12v, so we are now supplying power to the IRF510 drains,
but monitor the current into that pin from the power supply using a DVM set to read up to at least 3 Amps
(probably the 10 Amp range).  You are measuring current, so the meter is in-line, between the power supply
and pin 2 of that power connector.  Attach a 50 ohm dummy load to the antenna port.  Turn the rig on,
should be receiving.  Press PTT, you will hear the relays click, and that TX rail at K1 pin 1 is now at 12v. 
Current on the meter should be zero (I assume RV2 and RV3 are still fully clockwise). 
Slowly slowlly turn up RV1 till the meter reads 100ma.  Then slowly turn up RV2 till the meter reads 200 ma. 
The transition to zero current to several amps is quite sudden, toward the end of travel for RV1 and RV2,
and running with several amps of drain current like that can quickly blow the IRF510's.
Check that the IR510 heatsinks are not getting hot, should never be uncomfortable to hold your finger on them.

If you were able to adjust the drain current at each IRF510 to 100ma (200ma total) in the above step
then you have not yet fried the IRF510's.  Otherwise, it may be time to place an order for some IRF510's.

In addition to frying the IRF510's, you could also have fried L8 and L9, and the traces to them.
You can check for this by transmitting with no audio into the mike, and using your voltmeter from drain
(the top pin in the schematic) to ground on each of the IRF510's, should see 12v dc there if L8,L9 are ok.

At this point the rig should be working, and when speaking into the mike there should be power into
the dummy load.  You can now adjust RV1, increasing it by turning counter-clockwise to where there is
a bit of distortion in the transmitted audio as reported in an on-the-air test when speaking in normal voice
into the mike, then back it off somewhat from there.

Moral of the story:  Don't fiddle with RV1, RV2 and/or RV3 unless you have good reason.

Jerry, KE7ER




On Tue, Feb 20, 2018 at 07:31 am, M Garza wrote:
Hi Alan,
All is not lost.  Let's check a few things first.  One at a time.
You said that the display is pulsing when connected to the main board but is fine when connected to a computer.  What is the voltage going to the main board?  It almost sounds like there is not enough power going to the radio or the regulator in the power supply went bad.  What are the power supply specs?
 
Check the voltage regulator on the Raduino, is it close to 5v?
 
Let's start here.  Once we have the Raduino sorted, we will continue on.
 
Marco - KG5PRT 

Re: Connectors

Mike Yancey
 

I keep a (nearly) full set of those - buy them on Tayda and you'll laugh at your shopping cart on checkout: 475 pieces... Total cost, probably $11.

They're really useful, though - I use them on proto-board projects all the time. Just really easy to keep power wired polarized, connect & disconnect quickly,
clean & tidy.

Mike Yancey, KM5Z
Dallas, Texas

KD8CEC V1.02 CW Frequency TX Adjust on LCD #ubitx

Mitani Masaru
 

ubitx KD8CEC Firmware (and others) Transmits on CW, LCD Frequency shifts Sidetone Frequency.
It fix patch for V1.02.

On ubitx_ui
Set mode name(CWL/CWU) after Frequency plus(USB) or minus(LSB) to sidetone frequency.
100Hz shift needs critical tune for my ubitx.
This modify goes just LCD Frequency Transmits on CW Oparation.
SSB mode is no change Frequency shift.

JE4SMQ masa

Re: Case desined for uBITX #3d_printing #ubitx

Tim Young
 

Just be sure the copper will not contact the heat sinks...

DANGER : The heatsink of the µBITX carry the PA DC voltage. They should not be in contact with the chassis or any other metallic surface.


On 2018-02-20 07:23, Carl Beck wrote:

See reply from Tin Young above.  I don't have any in mine and so far no problem  I think Tim's copper clad idea is great.


Re: Raduino Replacemnt, COMING SOON!

Jerry Gaffke
 

HFSignals is very busy building uBitx's and have not had time to ship extra Raduinos.
Some in the forum have failing raduinos.


On Tue, Feb 20, 2018 at 05:59 am, Walter wrote:
Why is a replacement Raduino need?

Re: uBITIX Shipped

Vince Vielhaber
 

DHL handles their own customs processing. They don't have to wait for the US Customs to approve it. I've ordered things from China and had them at my door in 2 days. The two B40s I ordered took a sightseeing tour of Germany on the way here and still got here in 2-4 days. The length of time depends a lot on what day it was shipped and if there's a weekend involved. eg. shipped on Thursday, look for it next week.

Vince.

On 02/20/2018 07:25 AM, Rick Price wrote:
uBITX ordered on 12-25-2017, received PayPal notice of item being
shipped 2/20/2018, with DHL tracking number to US. Expected delivery on
Thursday 2-22, but with customs it probably won't be until Saturday or
Monday.

Re: Variable power control

Jerry Gaffke
 

You can adjust power out using RV1.
Fully clockwise is minimum power (it's backwards).

You can also adjust power out by adjusting the voltage into the PA supply connector pin
Most rigs just have that connected to 12v.
You could go up to 24v (and get nearly 4x the power out) if you improve the IRF510 heatsinks.



On Tue, Feb 20, 2018 at 05:51 am, Walter wrote:
Do I need to adjust the power to the whole transceiver or just the PA Power?  I notice that the power connector has a PA supply on it.  Can I regulate the PA power and control the power output of the rig?

Re: rv2- messed up setting and txing like mad!!!

M Garza <mgarza896@...>
 

Hi Alan,
All is not lost.  Let's check a few things first.  One at a time.
You said that the display is pulsing when connected to the main board but is fine when connected to a computer.  What is the voltage going to the main board?  It almost sounds like there is not enough power going to the radio or the regulator in the power supply went bad.  What are the power supply specs?

Check the voltage regulator on the Raduino, is it close to 5v?

Let's start here.  Once we have the Raduino sorted, we will continue on.

Marco - KG5PRT 

On Feb 20, 2018 8:47 AM, <mm0wxt@...> wrote:
I had it all up and running on receive working great for a week. I then got ahead of myself, over tiredd, and plunged a screwdriver in and messed with RV2&3. Still ok on receive.

Today I twiddled with Rv1, following something I had read earlier. Probably wrongly...grrrrrr... :-(

I then plug in a a cw key, for it to start this fault with the raduino flashing like a bordelo sign. I then notice the 4.7k snapped away from audio connector pin.

I have:
1. Stripped it all out of case
2. replaced 4.7k with new

rv2&1 are fully clockwise

raduino still flashing on and off when plugged into ubitx

Not flashing and all good when plugged into usb and pc

No idea what I have done!

What is the safest position to turn rv1,2,3 to ? My instinct is raduino regulator blown due to resistor malfunction? I am a complete newbie at this. please be patient...

Many thanks

Alan