Date   
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 

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

Alan -MMØWXT
 

Hi Raj and thank you! It was all ok on receive up until today. Once the raduino is plugged into ubitx it goes haywire and just goes on and of so can't even get as far as receive.

It seems tied in more with the broken 4.7k which happened today it all went nuts after that. As well as my prior sillyness :-/

Can you buy spare raduinos? or how do I go about fixing a fault relating to 4.7k malfunction?

Thank you

Alan

Re: My uBitx shipped today

Vince Vielhaber
 

Gettin close for me then. I ordered Dec 28th.

Vince.

On 02/20/2018 10:25 AM, Bill KC5SB wrote:
Got my shipping notification this morning. Mine was ordered on December
25th. DHL tracking indicates that it will arrive in Tulsa OK on
Thursday the 22nd.

Billl, KC5SB

Re: My uBitx shipped today

Bill KC5SB
 

Got my shipping notification this morning.  Mine was ordered on December 25th.  DHL tracking indicates that it will arrive in Tulsa OK on Thursday the 22nd.

Billl, KC5SB

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

 

Alan,

If your are receiving OK and tuning ok then the Raduino is working!

Raj


At 20/02/2018, you 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.

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

Alan -MMØWXT
 

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 

Re: Case desined for uBITX #3d_printing #ubitx

Carl Beck
 

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: Second batch of uBITX shipping? #ubitx

oldnormanbates <oldnormanbates@...>
 

USPS Mail does not have to get signatures fyi

Re: Second batch of uBITX shipping? #ubitx

oldnormanbates <oldnormanbates@...>
 

Ordered 30 Dec, No response yet N7PB Paul OldNormanBates Seattle WA USA

Re: Raduino Replacemnt, COMING SOON!

Walter
 

Hello Again,  I very new to the UBITX.

Why is a replacement Raduino need?

What would enhancements would this provide?

Thanks.  73.

P.S. almost have my UBITX built.  Looking forward to using it.  If I dont let the magic smoke out. LOL

Re: Variable power control

Walter
 

I am very new to UBITX.  Just putting mine together.

I want to use this for digital modes as well and need to lower the output power to 5w for use with my amp.

Has anyone actually put any of these suggestions to work? 

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?

I am thinking about a three position switch on the front panel with targets of 3w/5w/full power. 

Is there a good solution for this problem.  BTW I am not an EE guy either.  I am a ham radio hobbyist so please make the answer simple.  LOL

73

Re: Raduino Replacemnt, COMING SOON!

Bill Robbins
 

I will take two. 


On Feb 19, 2018, at 11:45 PM, Nik VK4PLN <nickpullen@...> wrote:

Hi everyone,
Thanks for the overwhelming interest.
I think at this stage I will offer the TH PCB only. I will build 1 or 2 complete boards to test, before making the PCB available...
If anyone would like to have another look over the board to check for errors that would be appreciated. 
https://easyeda.com/nikpolini/Raduino-1b3e0cb579154514ad2e014b83346b58  RadionoI1Cweeper.

73 VK4PLN.