Date   
Re: Tell me your favorite uBitx mods

Vince Vielhaber
 

Also look at the other offerings from your chosen seller. I looked at some last nite and it's actually cheaper to order them by 2s instead of 10s. In fact, with shipping, Buying 20 by 2s comes out to 78 cents each including shipping. They're 1.37 for 2. The same company is charging 8.50 for 10. Both add 1.85 for shipping, but additional quantities are free shipping.

Vince.

On 01/02/2018 12:22 AM, Jerry Gaffke via Groups.Io wrote:
Careful with those $0.85 RD16HHF-1's
Often some random switcher FET with fresh paint.
Google "fake RD16HHF"

On Mon, Jan 1, 2018 at 08:03 pm, Dave Bottom wrote:

Maybe a shift to Mitsubishi RD16HHF-1 MOSFET is worth a try. ...
They are everywhere from $5 each here in the US to US $0.85 (China)
in lots of 10.

Re: uBitx IRF510 to IRF510 physical measurement

bill richardson
 

Thanks i will make sure to isolate and ground the heat sink

Sent from my iPhone

On Jan 2, 2018, at 1:36 AM, John Backo <jabac@...> wrote:

Bill:

That's a good heat-sink for the IRF510 pair. Just be wary of shorting the devices to ground.
Also note that pc board and plastics are a very poor conductor of heat -- if you are building a case from non-metallic
materials, be sure that the IRF510's are connected DIRECTLY to the metal, and not through
the wall of the enclosure. Also, ground the metal. Hi.

I have bought this kind of heat-sink as surplus. They are used on voltage converters and inverters,
especially in solar installations.

john
AD5YE





Re: Tell me your favorite uBitx mods

K5ESS
 

Yes.  This part is particularly prone to fakes.  It would be helpful if folks could post both reliable and unreliable sources for these.

Mike

K5ESS

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Jerry Gaffke via Groups.Io
Sent: Monday, January 1, 2018 11:23 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Tell me your favorite uBitx mods

 

Careful with those $0.85 RD16HHF-1's
Often some random switcher FET with fresh paint.
Google "fake RD16HHF"

On Mon, Jan 1, 2018 at 08:03 pm, Dave Bottom wrote:

Maybe a shift to Mitsubishi RD16HHF-1 MOSFET is worth a try. ...  They are everywhere from $5 each here in the US to US $0.85 (China) in lots of 10.

Re: Tell me your favorite uBitx mods

Diver Martin <diver.martin@...>
 

My assumption is RFParts is a reliable source.  That's where I've gotten mine.  Given my employment with a semiconductor company that makes (competing) RF parts, I rarely go near ebay.

On Tue, Jan 2, 2018 at 7:43 AM, K5ESS <k5ess.nothdurft@...> wrote:

Yes.  This part is particularly prone to fakes.  It would be helpful if folks could post both reliable and unreliable sources for these.

Mike

K5ESS

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Jerry Gaffke via Groups.Io
Sent: Monday, January 1, 2018 11:23 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Tell me your favorite uBitx mods

 

Careful with those $0.85 RD16HHF-1's
Often some random switcher FET with fresh paint.
Google "fake RD16HHF"

On Mon, Jan 1, 2018 at 08:03 pm, Dave Bottom wrote:

Maybe a shift to Mitsubishi RD16HHF-1 MOSFET is worth a try. ...  They are everywhere from $5 each here in the US to US $0.85 (China) in lots of 10.




--
Martin Held - AE7EU
http://ae7eu.com/
-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?

Re: No TX #ubitx

 

Fully clockwise is the minimum current!

At 02-01-2018, you wrote:
Actually, I was going to post this as a separate issue, but in the PA bias step my initial reading was outside the range mentioned in the directions. With both bias pots at fully clockwise, I measured 420 mA when PTT is depressed. The directions indicate it should be 470 - 500. Could this be the problem?

Fwiw, my power supply is a 30A 12v deal.

Again, many thanks for the help!

Re: Tell me your favorite uBitx mods

Diver Martin <diver.martin@...>
 

James, et al,

Is there any one particular clock that you'd rather have as an Si570 that'd be best for phase noise, or would it need to be all 3?  It'd be easy enough to add the footprint, doesn't necessarily need to be populated.  My assumption is the clock for the first mixer on RX that brings the signal to the 45Mhz IF.

On Tue, Jan 2, 2018 at 6:24 AM, <jamesrocks4ever@...> wrote:
Maybe an Si570 for low phase noise. Serial connection for possible remote operation with the rtl and web sdr on a tablet. I have been thinking about laying out modules in 0805 two sided boards to make it fit in a smaller package. 
 I was actually waiting to get the ubitx until the first wave of mods. I’ve had the bitx out of a case more than in one doing mods.

James

Sent from my iPhone

On Dec 31, 2017, at 20:29, Diver Martin <diver.martin@...> wrote:

Hello all,

As I'm doing a motherboard mod, I'm looking to incorporate a bunch of mods into one PCB.  Right now, what I've got going are the following:

* A tuner + SWR Bridge (phase detector maybe?)
* A spot for an RTL-SDR (blogV3) dongle
* AGC Modifications
* Integrating LCD and headphone/mic/BNC/Power/etc jacks into the PCB

Other things I've thought about, space depending:

*Adding in footprints for a chinese AD9850 DDS module for one of the clock signals

I would like to hear the top mods you've done, and what you'd love to see integrated into a motherboard PCB that fits on top of the uBitx.  Battery charger?  Battery adapter? I dunno, bring it on!  If you have a favorite AGC mod, please tell me about it, and make some suggestions as well.  This is not promising to be a cheap kit, and full of SMT, but something I might make available.

Happy new year,

--
Martin Held - AE7EU
http://ae7eu.com/
-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?




--
Martin Held - AE7EU
http://ae7eu.com/
-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?

Re: No TX #ubitx

joe kallo <quietglow@...>
 

Right, so the directions say to go to min and then turn one pot until the current is 100mA higher, then to do the same w the other. Thats what I did, but my starting min current was 50mA lower than the spec in the directions. I didn't think it was enough it make a difference, but now with it not working I'm wondering.

To be clear, once I adjusted the bias as per the instructions, I measured 620mA when PTT was depressed.

Joe

Re: BITX20 Ver3C SBL VFO

Paul Smith
 

I just went through the same process with my Ver3B VFO, having had the same spread issue you have. I put a resistor (5k6 in my case) directly across the pot to reduce its range. And as Sarma suggests, I also added another 1k on the leg to bring the low end freq up as it was running too low.  In the end dropped the VFO spread from 530 to 360kHz. Incidentally, I have the VFO free-running without FLL and have to agree that it is very stable, though I did a few mods to improve that.

73 Paul ZS2OE 

Re: Tell me your favorite uBitx mods

K5ESS
 

I would think they are a reliable source also.  Unfortunately they are no-stock on the RD16HHF1.  RD15HVF1-101 may work.  Anyone care to comment?

Mike

K5ESS

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Diver Martin
Sent: Tuesday, January 2, 2018 9:45 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Tell me your favorite uBitx mods

 

My assumption is RFParts is a reliable source.  That's where I've gotten mine.  Given my employment with a semiconductor company that makes (competing) RF parts, I rarely go near ebay.

 

On Tue, Jan 2, 2018 at 7:43 AM, K5ESS <k5ess.nothdurft@...> wrote:

Yes.  This part is particularly prone to fakes.  It would be helpful if folks could post both reliable and unreliable sources for these.

Mike

K5ESS

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Jerry Gaffke via Groups.Io
Sent: Monday, January 1, 2018 11:23 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Tell me your favorite uBitx mods

 

Careful with those $0.85 RD16HHF-1's
Often some random switcher FET with fresh paint.
Google "fake RD16HHF"

On Mon, Jan 1, 2018 at 08:03 pm, Dave Bottom wrote:

Maybe a shift to Mitsubishi RD16HHF-1 MOSFET is worth a try. ...  They are everywhere from $5 each here in the US to US $0.85 (China) in lots of 10.



 

--

Martin Held - AE7EU

http://ae7eu.com/
-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?

Re: Si5351/A Utility Console

Michael Hagen
 

Hi Bruce,

I would like to try your SI5351 Command Console.


I have 2 stand alone PCBs with the SI5351 on board.   The larger PCB has the 20 Pin part.  This board is called Lotsa Clocks, 8 clocks.  I have jumpers for I2C address spread spectrum. 2 8 pin connectors for the 8 clocks and I2C connector.

On board is 3.3V regulator and level shifting, so it runs from the 5V and ground on the I2C connector.

I have adapted the new Raduino internal routines written by Jerry, KE7ER!  They work great.  I added and changed some functions to get both 0x60 and 61 addresses and more clocks.



Trying to put this in a Nano I get these errors compiling?


C:\Users\Michael Hagen\Documents\Arduino\MikeSketch\SI5351Cmd1\SI5351Cmd1.ino: In function 'void configSi5351()':

SI5351Cmd1:44: error: no matching function for call to 'Si5351::set_correction(long int&, si5351_pll_input)'

   si5351.set_correction(state.cor,SI5351_PLL_INPUT_XO);

 

What did I miss?

What I2C address do you write to?

Thanks,

Mike, WA6ISP

 

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

Re: Tell me your favorite uBitx mods

Diver Martin <diver.martin@...>
 

From what I recall, the HVF has a lower bias voltage condition than the HHF. (Might be the other way around).  Either one would work I would think, though you might have to adjust the feedback network (R261, C261 and R262/C262) as these have a lot of gain up at high frequencies where you don't want it.  Might wish to load it at high frequencies too with a 100pF capacitor or something on the drains.  I would also use a common ground heatsink to make the ground solid.  I'd try it out but have other bigger fish to fry right now.

Note:  Just in case it's not obvious, don't just drop in an RD15/16 into the IRF510's place.  The IRF510's are Gate-drain-source.  The RD TO-220's are Gate-Source-Drain, you'll have to mangle the pins a bit.

Looking at rfparts.com though, it shows me 'in-stock' ? (Just got their shipment in?)

On Tue, Jan 2, 2018 at 9:09 AM, K5ESS <k5ess.nothdurft@...> wrote:

I would think they are a reliable source also.  Unfortunately they are no-stock on the RD16HHF1.  RD15HVF1-101 may work.  Anyone care to comment?

Mike

K5ESS

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Diver Martin
Sent: Tuesday, January 2, 2018 9:45 AM


To: BITX20@groups.io
Subject: Re: [BITX20] Tell me your favorite uBitx mods

 

My assumption is RFParts is a reliable source.  That's where I've gotten mine.  Given my employment with a semiconductor company that makes (competing) RF parts, I rarely go near ebay.

 

On Tue, Jan 2, 2018 at 7:43 AM, K5ESS <k5ess.nothdurft@...> wrote:

Yes.  This part is particularly prone to fakes.  It would be helpful if folks could post both reliable and unreliable sources for these.

Mike

K5ESS

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Jerry Gaffke via Groups.Io
Sent: Monday, January 1, 2018 11:23 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Tell me your favorite uBitx mods

 

Careful with those $0.85 RD16HHF-1's
Often some random switcher FET with fresh paint.
Google "fake RD16HHF"

On Mon, Jan 1, 2018 at 08:03 pm, Dave Bottom wrote:

Maybe a shift to Mitsubishi RD16HHF-1 MOSFET is worth a try. ...  They are everywhere from $5 each here in the US to US $0.85 (China) in lots of 10.



 

--

Martin Held - AE7EU

http://ae7eu.com/
-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?




--
Martin Held - AE7EU
http://ae7eu.com/
-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?

Re: Si5351/A Utility Console

Michael Hagen
 

Hi again,

I bet I renamed something I should not of?

I just saw that.  I will try re-installing your download.

Happy New Year!

Mike, WA6ISP


 

Re: Si5351/A Utility Console

Michael Hagen
 

I still get compile errors.

73's

Mike, WA6ISP


On 1/2/2018 9:27 AM, Michael Hagen wrote:

Hi again,

I bet I renamed something I should not of?

I just saw that.  I will try re-installing your download.

Happy New Year!

Mike, WA6ISP


 

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

Re: Si5351/A Utility Console

Bob
 

Hi Bruce,

Thank you VERY much for making this available.  Exactly what I need to mess around with a couple of projects I have in mind!

73, Bob, WB4SON


On Mon, Jan 1, 2018 at 9:32 PM, Bruce MacKinnon KC1FSZ <bruce@...> wrote:
This has been very useful to me so I'll share it in case it is useful to others.

I have written an Arduino sketch that provides a simple command-line console (serial) to control most features of an Si5351/A.  This provides a very generic tool that can be used during the early phases of home-brew rig development when you just want to get the RF/IF chain up and running in a minimal way without fooling around with displays, encoders, Arduino coding, etc.  Just load up this sketch, connect the I2C pins to the Si5351/A, open he Serial Monitor (or other terminal program) and you're ready to start tuning.

There are some handy features that make it easy to deal with superhet math and filter pass-band tweaking. The details are here: https://github.com/brucemack/Si5351-Console.

I'm doing a scratch-build of the BITX-40 with some modifications so I've been using this sketch a lot.  For my BITX I use CLK0 for the VFO, CLK2 for the BFO, and CLK1 as an RF signal injector/tester.  Here is a video of the receive side up and running: https://www.youtube.com/watch?v=nueR5nY3wYc

Happy New Year and 73s,

Bruce KC1FSZ 


Re: BCI filter question.

Smitty, KR6ZY
 

I’ll add my design to the pile of other great (possibly better) options: 

Note that mine is only good for QRP power levels, or a receiver. 

-Mark

On Jan 2, 2018, at 6:28 AM, Karl Heinz Kremer, K5KHK <khk@...> wrote:

For a cheap BCI filter, take a look here (it's the first article in this document): http://www.qrpforum.de/index.php?page=Attachment&attachmentID=16959&h=269da5721a0d272fc6ce550399700bfc9d9a8155

For a simpler, but slightly more expensive solution, see here: http://www.qrpme.com/?p=product&id=BCI

If you want something you can leave in during transmit, take a look here: http://vk3il.net/projects/broadcast-band-filter/

You an also calculate your own, all you need is a high-pass filter that cuts off just above the AM band. As Gordon suggested, a notch filter might be a good idea as well. 
--
Karl Heinz - K5KHK

Re: Tell me your favorite uBitx mods

Dave Bottom <ars.kd6az@...>
 

John, AD0RW

Perfect!  I'll give it a try.
Now my opportunity to get the dev environment setup to make changes.

Thanks.
Dave WI6R

On Tue, Jan 2, 2018 at 7:04 AM, John Pieper <j.pieper@...> wrote:
i addressed the erratic keying a few days ago but it sank like a stone.
The reluctance to send the first dit is due to the firmware. It is trying to enforce correct character spacing but the consequence is that the paddle is sampled very slowly when it is open (i.e. a character is not already started). I was able to undo this in my setup and always sample as fast as possible (within constraints of not using interrupts, which people seem to have a problem with) and got much better responsiveness. See message 37720 for details.

John AD0RW




--
73 Dave WI6R

Re: Variable power control

John McFadden
 

How variable does it need to be? Could the Raduino drive a relay to switch between the board's power level and a higher voltage source by a software menu satisfy your need? Or are you looking for more than two levels?

John


On 1/1/2018 11:19 AM, ad4xx@... wrote:
I'd love it if I could add a variable control to adjust output power on the uBitx.  After looking for solutions, I understand now that it's not a simple add of a potentiometer.  Anyone done this yet?

Re: BCI filter question.

Dexter N Muir
 

I'm wondering: How about an anti-phase carrier to knock the guts out of each harmonic at appropriate levels? Phase-locked to fundamental with an output 'dirty' enough to have appropriate harmonics to knock the incoming energy for six. Filters then deal with sidebands if needed.
- Just off the top of the nut and ready to be shot down ... :)
73 de ZL2DEX

Re: Tell me your favorite uBitx mods

Dave Bottom <ars.kd6az@...>
 

Thanks to all RE Fake RD16HHF1's - 

I always buy from RF Parts.  Qty 10 are $3.95 each and UPS is one day.  Hard to argue with good service and good price.

Dave WI6R

On Tue, Jan 2, 2018 at 7:43 AM, K5ESS <k5ess.nothdurft@...> wrote:

Yes.  This part is particularly prone to fakes.  It would be helpful if folks could post both reliable and unreliable sources for these.

Mike

K5ESS

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Jerry Gaffke via Groups.Io
Sent: Monday, January 1, 2018 11:23 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Tell me your favorite uBitx mods

 

Careful with those $0.85 RD16HHF-1's
Often some random switcher FET with fresh paint.
Google "fake RD16HHF"

On Mon, Jan 1, 2018 at 08:03 pm, Dave Bottom wrote:

Maybe a shift to Mitsubishi RD16HHF-1 MOSFET is worth a try. ...  They are everywhere from $5 each here in the US to US $0.85 (China) in lots of 10.




--
73 Dave WI6R

Re: Si5351/A Utility Console

Karl Heinz Kremer, K5KHK
 

Mike, 

I just cloned the GIT project, and it compiles without errors in Arduino 1.8.5. Do you have a recent version of the EtherKit Si5351 library? 
--
Karl Heinz - K5KHK