Date   
Re: uBITX shipping time

Elliott J Olson
 

Hello,

Arrived today, 8 weeks and a day from ordering.

Friday, April 6, 2018, 1:11:35 PM, I wrote:

EJO> Ordered Feb 12, 2018. Notified yesterday (April 5) it has
EJO> shipped). Via DHL it should be here by the end of next week, about 8.5 weeks. :)



--
Best regards,
Elliott mailto:@n0ukf

Re: uBitx just started transmitting a loud hum #ubitx-help

 

James,

The hum you mentioned is in TX or RX mode ?

In RX mode there should be no DC voltages on Q6.

Raj

At 11/04/2018, you wrote:
Raj, just to clarify, that scope was on the collector of q6 with the 4v wave form. The base had only shown much less voltage. The collector had DC voltage as well (somewhere around 10v but I forgot to measure it exactly last night) which is about what I would expect.

The mic input to the base of q6 does have DC of around 1 or 2V again I didn't measure it exactly as it looked about right for the voltage divider bias made up of r61 and r62.

As pointed out, there may well be a grounding issue elsewhere, which would/may explain hearing audio on transmit at the beginning, but at least the culprit for the hum was related to the electret mic.

Just to clarify, haven't measured current of rig yet on tx but it is less than 3A as my fuse is intact.

#parts #parts

Kevin Luxford
 

Here is some information on shipping times from India to Australia (not uBITX but uBITX case and BITX addon accessories from amateurradiokits.in (Sunil Kumar Lakhani, VU3SUA).
BITX addon accessories posted March 27, 2018 and uBITX case posted on April 1, 2018 via India Post and both packages were delivered by Australia Post yesterday, April 10, 2018.
Vy 73,
Kevin VK3DAP / ZL2DAP

Re: Variation on Ian's KD8CEC uBitx software (based on his 1.04 release for now) and ATU sketch. #ubitx

John <passionfruit88@...>
 

Uploaded an update of the KD8CRC based software (V1.04 based) for Raduino and ATU Arduino.

Key changes in Version 20180411:

- Made the menu system dynamic so that items can be inserted at compile time or can be context-dependant 
                   at run time.
- Added output power attenuation for 80 to 10M using first IF shift. 
- Added new menu item "Power Level": low/high/max for SSB modes. 
- Made CW menu items display dependant on having CW modes selected. 
- Reduced the level at which the software AGC comes in. Adjusted the correction of S-Meter when software AGC
  comes into play.
- Changed tone generation for ATU tuning sequence from CW to using SSB with the 2nd Arduino generated tone.
- Change tune sequence to a)Select the "Low" power setting before performing a tune and 
                   b)Change tune frequency to tune on carrier (offset by audio tone frequency).

Assumes the following hardware change (only if using an ATU): a digital output on the ATU Arduino is used to generate a tone. An audio filter identical to the Raduino CW audio tone filter is used and it's output is connected to the mic input of the SSM2167 module.  If digital outputs are freed-up on the Raduino, for example by using an I2C display, the same can be implemented with only the Raduino.

This allows to have a low power tune function.

All the best,

73, John (VK2ETA)

Re: W0EB/W2CTX Latest uBITX software release #ubitx

Chris Clarke G3SQU
 

Thanks Jim, I'll have a go at that wiring. I have tried implementing your firmware but my key didn't function as presently wired. I like the ideas in your menu implementation but I did find it difficult to remember how to proceed at certain points, in particular how to get straight back to the normal tuning function after selecting RIT ... kept finding I was doing the wrong thing!
73
Chris G3SQU

Re: #bitx40 #parts #bitx40 #parts

jeff.goodley@...
 

Will you ship to UK?  What cost?

Jeff
G6EXF

Re: Erratic tuning with my new uBitx

Ian Lee
 

Chris

"Enabled Adjust Frequency CW frequency" 
I thought that this feature was pretty good, so I set it the default use.
Perhaps this option will solve the problem you think.

I'll explain it briefly.
What you think is the right answer.
in LSB mode and USB mode, pressing the CW key will subtract or added the side tone value to frequency,.
The same is true for CWL and CWU modes.
(CWL and CWU are different only for BFO)

"Enabled Adjust Frequency CW frequency"   
When this option is checked, the actual transmission frequency will be displayed on the LCD window.

I found a bug that was not applied when I displayed this on the LCD window in RIT mode during this test. 
I will fix this bug in the next version.

I tried various tests before. 
and I'll post more details on the blog with the photos I just tested.

Ian KD8CEC


2018-04-11 0:31 GMT+09:00 Chris Clarke <csclarke@...>:

Hi Ian

I'm nearly there!

I've installed v1.061 firmware and uBITX Memory Managerv1.01 and unchecked the option to show frequency shift in CWL and CWU modes.

Can you tell me exactly what the option "Enabled Adjust Frequency CW frequency" does when ticked (which it is)?

After enabling RIT, now RitTX and RIT A both show identical values, whilst my actual TX frequency = RIT A - CW tone frequency (which I've just changed to match the 600Hz peak of my beloved W3NQN passive CW audio filter). RIT A changes as a I tune, as expected, and Rit TX is unchanged,as expected, and I suppose you could argue that Rit TX is the frequency to which I need to tune to get back whence I started, so is that the intention? But in my head I think I should be seeing the TX frequency!

I'm still clearly still misunderstanding something, but I'm definitely getting closer!

73 Chris
G3SQU



--
Best 73
KD8CEC / Ph.D ian lee
kd8cec@...
www.hamskey.com (my blog)

Re: uBitx just started transmitting a loud hum #ubitx-help

_Dave_ K0MBT
 

I had the bitx40 that quit transmitting. The electret mic failed. I didn't get the hum just silence. The replacement mic has given the radio increased power, about 10 watts. 

I wondered if humidity from my breath caused the failure. I like the idea of a voltage spike though. Seems more likely.  Am wondering if I should put a choke between voltage source and load resistor.
Dave
K0MBT

Re: VK4PLN's Radrino replacement boards

K9HZ <bill@...>
 

Nick, is there a schematic layout of the board posted somewhere?


Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ

 

Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

 

Owner – Operator

Villa Grand Piton - J68HZ

Soufriere, St. Lucia W.I.

Rent it: www.VillaGrandPiton.com


email:  bill@...

 


On Apr 10, 2018, at 10:07 PM, Nik VK4PLN <nickpullen@...> wrote:

Im glad you are happy with them, See my blog for a few photos, https://vk4pln.blogspot.com.au/
73 Nick

Re: #uBITX polyfuse? #ubitx

K9HZ <bill@...>
 

Depends upon the mode of failure i suppose.  My protection circuit posted on uBITx.net acts far quicker than a polyfuse could and is more certain to protect in any case.  


Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ

 

Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

 

Owner – Operator

Villa Grand Piton - J68HZ

Soufriere, St. Lucia W.I.

Rent it: www.VillaGrandPiton.com


email:  bill@...

 


On Apr 10, 2018, at 10:11 PM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:

As a means of protecting the IRF510's, I think a polyswitch in the PA-PWR line should work great.
The IRF510's mostly fail due to overheating, a small polyswitch will have far less thermal mass
then the IRF510's plus heatsinks.

Often an LED and resistor in series are placed across the polyswitch,
such that when the polyswitch opens up the LED turns on.
That tells the operator to shut down power and let the polyswitch reset.

Would be interesting to experiment a bit, the IRF510's are cheap.
Turn up the gate bias pot till something gives.
My bets are on the polyswitch (rated for say 2 or 3A, will blow somewhat north of that).

I doubt you need a limiting resistor in this particular case. 

Jerry


On Tue, Apr 10, 2018 at 07:38 pm, lostfrogsrecords wrote:
They work slowly, need a current limiting resistor to allow the polyfuse to reach cutoff temperature before the protected device fails.  Again, slow...

Re: uBitX: Ordered Feb 20, received ship notice today, Apr. 6 #ubitx

yachtdesign@...
 

ordered 5th of March, today (11.4.) I`ve got the paypal shipping notification. Will be interesting when it will arrive.

Re: VK4PLN's Radrino replacement boards

kevintg51@...
 

Hi Bill
Try this:- https://vk4pln.blogspot.com.au/  Nick did post it.
Cheers
Kevin VK2KTG

Re: uBitx just started transmitting a loud hum #ubitx-help

James
 

Raj, the receive is 100% fine. I only get the hum on transmit.

Re: W0EB/W2CTX Latest uBITX software release #ubitx

Jim Sheldon
 

OK Chris,
Yes over-use of the encoder/function button prompted a lot of our changes as you have to keep holding it longer and longer to get to certain functions and the human timer isn't the best at times - LOL.

Jim

------ Original Message ------
From: "Chris Clarke" <csclarke@...>
Sent: 4/11/2018 3:09:00 AM
Subject: Re: [BITX20] W0EB/W2CTX Latest uBITX software release #ubitx

Thanks Jim, I'll have a go at that wiring. I have tried implementing your firmware but my key didn't function as presently wired. I like the ideas in your menu implementation but I did find it difficult to remember how to proceed at certain points, in particular how to get straight back to the normal tuning function after selecting RIT ... kept finding I was doing the wrong thing!
73
Chris G3SQU

Re: Erratic tuning with my new uBitx

Chris Clarke G3SQU
 

Great, thanks very much Ian

Chris G3SQU

Re: VK4PLN's Radrino replacement boards

K9HZ <bill@...>
 

Thats just a picture of the board?


Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ

 

Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

 

Owner – Operator

Villa Grand Piton - J68HZ

Soufriere, St. Lucia W.I.

Rent it: www.VillaGrandPiton.com


email:  bill@...

 


On Apr 11, 2018, at 7:48 AM, kevintg51@... wrote:

Hi Bill
Try this:- https://vk4pln.blogspot.com.au/  Nick did post it.
Cheers
Kevin VK2KTG

Re: uBitx just started transmitting a loud hum #ubitx-help

Skip Davis
 

Dave are you using shielded cable on your mic? It could be RF getting into the mic circuit. If you are using shielded cable try putting decoupling caps across the mic audio line. 

Skip Davis, NC9O

On Apr 11, 2018, at 06:02, davesters@... wrote:

I had the bitx40 that quit transmitting. The electret mic failed. I didn't get the hum just silence. The replacement mic has given the radio increased power, about 10 watts. 

I wondered if humidity from my breath caused the failure. I like the idea of a voltage spike though. Seems more likely.  Am wondering if I should put a choke between voltage source and load resistor.
Dave
K0MBT

Re: AGC circuit to try?

Dexter N Muir
 

Bill N2CQR ('Soldersmoke') has been using 2 FETs in 'series'/cascode as dual-gates. Jxxx numbers. Bog-standard, readily available. AFAIK good NF, gain-bandwidth etc...

73
Dex, ZL2DEX

Re: AGC Added to uBITx

K4LXY
 

Do you mean R253?
Howard 

Re: POP fix

ve7hcw@...