Date   
Good mic for Ubitx and Bitx40

Mike
 

Group,

 I just wanted to let everyone know of a decent mic to use for either the Bitx40 or Ubitx.  I use a General Electric Phoenix microphone part number 19B801398P3. This Microphone is a dynamic element WITH and internal preamp! This mic drives the BITX family nicely without screaming into the mic.

I hope this helps someone!

73's

Mike WA3O

Re: Tell me your favorite uBitx mods

Chris Clarke G3SQU
 

Hi Jack,


I've literally  just purchased "Arduino Projects for Amateur Radio" so not delved inside yet ... will I need Beginning C for Arduino in addition, or will Chapter 1 be enough to get me sorted with the IDE?


Chris

G3SQU


PS is the web-site www.arduinoforhamradio.com forthcoming only the domain seems to be taken!

www.arduinoforhamradio.com
U.S. Microwave, Inc. specializes in Microwave communications equipment for the 5.7 GHz, 5.8 GHz WLAN, U-NII, 802.11a and Wireless Internet Access markets. We also ...


From: BITX20@groups.io <BITX20@groups.io> on behalf of Jack Purdum via Groups.Io <jjpurdum@...>
Sent: 03 January 2018 21:55:40
To: BITX20@groups.io
Subject: Re: [BITX20] Tell me your favorite uBitx mods
 
"Everything you ever wanted to know..." is in Beginning C for Arduino. Chapter 1 shows you how to download and set up the IDE. Check Amazon.com and click on the "Look Inside" icon. (Caution: might be biased.)

Jack, W8TEE



From: Dave Bottom <ars.kd6az@...>
To: BITX20@groups.io
Sent: Wednesday, January 3, 2018 4:03 PM
Subject: Re: [BITX20] Tell me your favorite uBitx mods

I got my cable yesterday (thanks for the tip Jack) and will add it to my uBITX  as well.
Nice to just plug in the cable without having to open the box.

I'm starting from scratch, not having done any software for 25 years this will be interesting to get started.
I'm hoping the BITX Wiki has some guidance for getting a dev environment setup for a relative software newbie.
I suppose a virtual machine on my Win 10 box to run Linux will be a start?

Dave WI6R


On Tue, Jan 2, 2018 at 7:41 PM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
I'm adding this to my development µBITX:

Inline image
Check on ebay #172488451918
Jack, W8TEE


From: David Arthur <mumrah@...>
To: BITX20@groups.io
Sent: Tuesday, January 2, 2018 5:03 PM

Subject: Re: [BITX20] Tell me your favorite uBitx mods

A mini usb "breakout" would be nice for uploading new Raduino sketches without opening up the box. Could double as a CAT control interface.

On Tue, Jan 2, 2018 at 4:53 PM K9HZ <bill@...> wrote:
I use the RD15HVF1 exclusively so i don't need to worry about multiple parts.  The gain of both parts is very close and they are pin compatible. 


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.

email:  bill@...
 

On Jan 2, 2018, at 11:09 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?

--
David K4DBZ
Unofficial bitx chatroom: https://discord.gg/ CrHvWFc





--
73 Dave WI6R


Re: Tell me your favorite uBitx mods

William Kimber
 

Don't be shy Jack.

Will, ZL1TAO


On 04/01/18 10:55, Jack Purdum via Groups.Io wrote:
"Everything you ever wanted to know..." is in Beginning C for Arduino. Chapter 1 shows you how to download and set up the IDE. Check Amazon.com and click on the "Look Inside" icon. (Caution: might be biased.)

Jack, W8TEE



From: Dave Bottom <ars.kd6az@...>
To: BITX20@groups.io
Sent: Wednesday, January 3, 2018 4:03 PM
Subject: Re: [BITX20] Tell me your favorite uBitx mods

I got my cable yesterday (thanks for the tip Jack) and will add it to my uBITX  as well.
Nice to just plug in the cable without having to open the box.

I'm starting from scratch, not having done any software for 25 years this will be interesting to get started.
I'm hoping the BITX Wiki has some guidance for getting a dev environment setup for a relative software newbie.
I suppose a virtual machine on my Win 10 box to run Linux will be a start?

Dave WI6R


On Tue, Jan 2, 2018 at 7:41 PM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
I'm adding this to my development µBITX:

Check on ebay #172488451918
Jack, W8TEE


From: David Arthur <mumrah@...>
To: BITX20@groups.io
Sent: Tuesday, January 2, 2018 5:03 PM

Subject: Re: [BITX20] Tell me your favorite uBitx mods

A mini usb "breakout" would be nice for uploading new Raduino sketches without opening up the box. Could double as a CAT control interface.

On Tue, Jan 2, 2018 at 4:53 PM K9HZ <bill@...> wrote:
I use the RD15HVF1 exclusively so i don't need to worry about multiple parts.  The gain of both parts is very close and they are pin compatible. 


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.

email:  bill@...
 

On Jan 2, 2018, at 11:09 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?

--
David K4DBZ
Unofficial bitx chatroom: https://discord.gg/ CrHvWFc





--
73 Dave WI6R



Re: Good mic for Ubitx and Bitx40

Mike
 

I forgot to mention how to wire it up...

RED = PTT
White = Mic
Black and Shield = GND

That is it!

Mike WA3O

Re: No TX #ubitx

joe kallo <quietglow@...>
 

Okay. Here's what I've got:

I came home, turned on the ubitx which is still hooked up to a proper antenna. I set up my other radio, and stuck a 12" piece of wire in its antenna coax spot. I then keyed down my cw key on the ubit x and I heard the tone loud and clear on my test radio. It was sitting maybe 5' away.

I tested output power with two power meters which read on either a 20v or 200v scale and neither one registered any motion of the needle when keying down. I also didn't measure any deflection with the mic HAAALLLO but I suppose that could also indicate a problem with the mic.

So is it safe to conclude that the transmit functionality is working, it's just very low power for some reason?

If it makes any difference at all in how I should proceed, I only plan to use this radio for cw. 

Re: BCI filter question.

Jacob Farnes
 

https://soldersmoke.blogspot.com/2016/01/high-pass-filter-knocks-down-am.html

Bill N2CQR made a good one that whooped the 20kW station 2 miles from me. I finally got the silver mica capacitors to finish mine. I originally built it for my RTL-SDR using ceramic caps.

560pF for the ends and 440pF (2x 220pF) for the pairs in the middle.

6uH or 35 turns on a T50-2
5.8uH or 34 on the center one to reduce ripple.

I can't use Elsie software here at work, but if you can sacrifice 160m reduce capacitance a bit, you might be able to increase rejection by moving the filter frequency higher.

Arduino Regulator

Mr Mike <kf8zn@...>
 

I placed a heat sink on the raduino regulator. I THOUGHT the tab was a ground potential. Short story, it is not! No damage as initial power up was done using a 500 ma supply. Just FYI. All working well now.

Re: Arduino Regulator

Jerry Gaffke
 

Tab is ground on the Raduino's LM7805CV
I have removed it from my Raduino and re-attached to the other side of the board with tab toward the middle of the board.
Mounted flat to the board, a good heatsink can be had by soldering the tab to the groundplane there.

A diode such as a 1n4007 (or any 1n400x) in series with that 12v line from main board to raduino is a good idea
otherwise 5v power from your usb connection to a host computer backs through the LM7805 and 
attempts to power up the main board.
Something like a 25 to 50 ohm half watt resistor in series with that diode can be added
to dissipate some of the heat that would otherwise go to the LM7805.


On Wed, Jan 3, 2018 at 03:52 pm, Mr Mike wrote:
I placed a heat sink on the raduino regulator. I THOUGHT the tab was a ground potential. Short story, it is not! No damage as initial power up was done using a 500 ma supply. Just FYI. All working well now.

Re: ordering a replacement raduino

Gordon Gibby <ggibby@...>
 

Michael, I got the Raduino and it appears to be in good shape. Thanks

Sent from my iPhone

On Dec 22, 2017, at 13:18, Gibby,Gordon L <ggibby@...> wrote:

wrote:

#ubitx new uBITX to scout campout, what would you change? #ubitx

D. Daniel McGlothin KB3MUN
 

I'm taking my newly assembled uBITX camping in south-central Pennsylvania at the end of January. I'm working on building a 10m-40m STL (Mag Loop) for the occasion. I expect more than 100 boy scouts in camp, and am planning on demonstrating ham radio as a follow-on to the area's fall campout centered on JOTA. The intention is to supervise scouts using radio to make contacts. Other than field day operations, portable and QRP operations are somewhat new to me.

What would you change from the stock radio if you were doing this?

In advising me, keep in mind that I've about 2 weeks to prepare. One thing I need to do is encase the rig--will be using something like this clear food storage container ( https://www.amazon.com/dp/B01JCNEJVQ ) so that the boys can see the "magic" inside it.

I have a limited on-hand 'junk box'; I can make Raduino coding changes easily.

Thanks,
Daniel KB3MUN

Re: Arduino Regulator

Jerry Gaffke
 

That resistor in the wire plus caps to ground at both main board and raduino ends
can reduce hash in the receiver due to display updates (often referred to as tuning clicks in this forum).


On Wed, Jan 3, 2018 at 04:09 pm, Jerry Gaffke wrote:
Something like a 25 to 50 ohm half watt resistor in series with that diode can be added
to dissipate some of the heat that would otherwise go to the LM7805.

Re: #ubitx new uBITX to scout campout, what would you change? #ubitx

Jerry Gaffke
 

Good luck with the mag loop, they can be very finicky.
I'd recommend a simple dipole (or inverted V), 40m might be good.
If you want to spend money, the EFHW-8010  (or EFHW-4010) is a good portable antenna, easier to set up than a dipole.
Go to the camp in advance if possible and get the antenna set up, try it out.
Failing that, at least try setting stuff up and using it in a nearby park.
For the demo, have some nearby ham scheduled so there will be at least one easy QSO guaranteed.
Very nearby unless you know what you are doing, as groundwaves don't go far and propagation can be dead much of the day.

Packaging the radio?
I have my bitx40 on plywood now, corner standoffs mounted with threaded end pointing down,
get inserted into holes drilled into the plywood to hold the board in place (unless turned upside down).
I've mounted front and back panels of PC board material, but could just duct tape wires and connectors to the plywood.
Let them know that ugly looking hacks can work just fine.  Sometimes.


On Wed, Jan 3, 2018 at 04:24 pm, D. Daniel McGlothin KB3MUN wrote:
I'm working on building a 10m-40m STL (Mag Loop) for the occasion.

Re: #ubitx Power output on 40 / 80 m with high current levels #ubitx

John Backo
 

Alex:

The use of the FTxx-43 should not make too much of a difference. But it does tend to fall
off in efficiency at the higher frequencies. If you stick with that, you are probably better off using
FTxx-61 material, but FTxx-10 is good overall for the full range.

Yes, the transformer windings in Farhan's schematic imply a trifilar winding, but actually
some of the transformers are different, and only 2 of the trifilar windings are used in most places.
But you got it right. The findings of lower output at higher frequencies is perfectly consistent.
I am glad you are reading of the trials of WA2EBY. Now you see what a problem it really is.
The fact that you are using mainly smd materials also contributes to the layout problem...but
you are well on the right track. Congratulations.

Now beware of ground loops and the oscillation problem. Actually, the ground loop problem is
a bigger one. The usual solution is to somehow come up with a common ground point for ALL
the signals, both AC and DC. It may be that some more shielding is needed between the PA
and the rest of the rig (a la early Yeasu rig ideas). But you will find that out.

john
AD5YE

Re: #ubitx new uBITX to scout campout, what would you change? #ubitx

Dennis Zabawa
 

You may want an amplifier to boost the receive sound level for a group to listen.  I have done this using amplified computer speakers.

Error in ubitxv3.pdf schematic

Gordon Gibby <ggibby@...>
 

In the ubitxv3.pdf schematic published at:  http://www.hfsignals.com/wp-content/uploads/2017/12/ubitxv3.pdf


pin 1 of the Raduino Connector 01x16 is shown as being connected to GROUND



However, on the Raduino schematic published at:   http://www.hfsignals.com/wp-content/uploads/2017/12/raduino.pdf

(which has the REVERSE NUMBERING OF THE PINS)


pin 16  of the connector is shown as connected to pin 15 , with both connected to the input wiring of the 5V regulator (which nominally would be at +12V)


The Raduino schematic appears correct based on visually inspecting the Raduino itself.  the two pins closest to the 5 V regulator are connected together.   











Re: #ubitx new uBITX to scout campout, what would you change? #ubitx

Gordon Gibby <ggibby@...>
 

In Florida we have experimented with a friend's mag loop versus his attic mounted dipole and the dipole was a CLEAR WINNER.

The 'aperture' of the mag loop is just so much smaller than the dipole it isn't even a fair fight in my humble opinion.

The uBitx shines on 80 and 40 meters. 80 and 40 shine at night and in the early monring and evening. Digital contacts to WINLINK servers are easy to do! You have two weeks, you can be sending emails fro their campsite and explaining how important that can be in disasters if you practice and find who has strong signals to your area at the appropriate times of the day/night. On 80 at night I can easily hit servers in my state and a state or two around me. These stations don't move and their signals are similar day to day to day, so you can practice them.

Having a prescheduled friend within 10 miles for daytime ground wave or 30-50 miles for NvIS on 40 might be a great idea. Otherwise, a voice NET will always have people at various distances and SOMEONE will be strong.

Building the device on an upturned plastic desk organizer lets everyone see the electronics and still gives you a place to hide the wires. I think it was K7AGE who put a photo on the net of this and I copied him.

PSK is fascinating and you might make daytime contacts on 20 and very likely nighttime contacts on 40.

Doing demos with QRP rigs is a dicey proposition so I would have lots ofbackup ideas and practice practice practice before the day. I use 300 ohm stranded ladder line to random dipoles of 100+ feet in length and decent autotuners (or even a manual tuner) and get great results because they have such low losses.

Good luck and great effort!

gordon


________________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of D. Daniel McGlothin KB3MUN <kb3mun@...>
Sent: Wednesday, January 3, 2018 7:24 PM
To: BITX20@groups.io
Subject: [BITX20] #ubitx new uBITX to scout campout, what would you change?

I'm taking my newly assembled uBITX camping in south-central Pennsylvania at the end of January. I'm working on building a 10m-40m STL (Mag Loop) for the occasion. I expect more than 100 boy scouts in camp, and am planning on demonstrating ham radio as a follow-on to the area's fall campout centered on JOTA. The intention is to supervise scouts using radio to make contacts. Other than field day operations, portable and QRP operations are somewhat new to me.

What would you change from the stock radio if you were doing this?

In advising me, keep in mind that I've about 2 weeks to prepare. One thing I need to do is encase the rig--will be using something like this clear food storage container ( https://urldefense.proofpoint.com/v2/url?u=https-3A__www.amazon.com_dp_B01JCNEJVQ&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=1lk8McsOVQ0fn063ot6qoaYEJ_HFJLwuqfj5xQR_jPs&s=vbSW2taWlASQbxfGFRmWT4MYyl6zGbe1sTLJX8-4wMQ&e= ) so that the boys can see the "magic" inside it.

I have a limited on-hand 'junk box'; I can make Raduino coding changes easily.

Thanks,
Daniel KB3MUN

Re: #ubitx new uBITX to scout campout, what would you change? #ubitx

Jerry Gaffke
 

In answer to your question about changes needed to the uBitx, not much.
Most folks seem to be having good success with the uBitx straight out of the box.
Some discussion here about low tx power levels, especially on the higher frequencies.


On Wed, Jan 3, 2018 at 04:24 pm, D. Daniel McGlothin KB3MUN wrote:
What would you change from the stock radio if you were doing this?

Re: Arduino Regulator

Michael Hagen
 

Usually on TO-220 the tab and center lead ARE Ground.   The last 100 I bought from Mouser are that way? 

Mike, WA6ISP

 


On 1/3/2018 3:52 PM, Mr Mike via Groups.Io wrote:
I placed a heat sink on the raduino regulator. I THOUGHT the tab was a ground potential. Short story, it is not! No damage as initial power up was done using a 500 ma supply. Just FYI. All working well now.

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

Re: Arduino Regulator

Stephen Harrison
 

Depends on the device



Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------
From: Michael Hagen <motdog@...>
Date: 1/3/18 21:45 (GMT-05:00)
To: BITX20@groups.io
Subject: Re: [BITX20] Arduino Regulator

Usually on TO-220 the tab and center lead ARE Ground.   The last 100 I bought from Mouser are that way? 

Mike, WA6ISP

 


On 1/3/2018 3:52 PM, Mr Mike via Groups.Io wrote:
I placed a heat sink on the raduino regulator. I THOUGHT the tab was a ground potential. Short story, it is not! No damage as initial power up was done using a 500 ma supply. Just FYI. All working well now.

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

Re: Arduino Regulator

Vince Vielhaber
 

It's true on the positive fixed regulators, at least every one I've seen. Positive variable, not sure.

On the negative fixed regulators (7905, 7912, ...) the center pin and tab are the input, not ground.

Vince.

On 01/03/2018 10:18 PM, Stephen Harrison wrote:
Depends on the device



Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------
From: Michael Hagen <motdog@...>
Date: 1/3/18 21:45 (GMT-05:00)
To: BITX20@groups.io
Subject: Re: [BITX20] Arduino Regulator

Usually on TO-220 the tab and center lead ARE Ground. The last 100 I
bought from Mouser are that way?

Mike, WA6ISP




On 1/3/2018 3:52 PM, Mr Mike via Groups.Io wrote:
I placed a heat sink on the raduino regulator. I THOUGHT the tab was a
ground potential. Short story, it is not! No damage as initial power
up was done using a 500 ma supply. Just FYI. All working well now.
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID "MotDog@..."
Mike@...