Date   
Re: Tell me your favorite uBitx mods

William R Maxwell
 

That eBay number isn't being found Jack. Could you check it please?

Bill, VK7MX


On 3/01/2018 2:41 PM, Jack Purdum via Groups.Io 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



Re: No TX #ubitx

MVS Sarma
 

Once Farhan told that aall IRF did not behave same  otr close neasrby regarding bias.  we can perhaps avaerage the Experts ( vu2ESE) experience  to a values that can be pre- limited at 5V levelby a series resistor at the preset TOP end.
  It might help  not to exceed , even by accident.. 

 best of 2018 to all members of the site.
regards
 sarma
 vu3zmv

regards
Sarma
 

On Wed, Jan 3, 2018 at 9:29 AM, Ashhar Farhan <farhanbox@...> wrote:
can you hook an RF probe together?

- f

On Wed, Jan 3, 2018 at 9:16 AM, Raj vu2zap <rajendrakumargg@...> wrote:
Joe,

The bias current flow is not linear with bias pot. The current will suddenly increase. Put your PS on current limit to about 1A
and then set the current.

touch or temporarily solder a short wire to the component so that it will act as an antenna. Then you can pick up your
low level TX signal on another receiver.

Raj

At 03-01-2018, you wrote:
>Me too! I even turned up the bias pots a little. Didn't help. I also removed the radio from the box and set it up again with jumpers, also with no effect.
>
>Raj I am not sure exactly what you mean re: putting the wire to c80. I see c80, but I am not sure what you're suggesting I try to do.
>
>Joe






Re: Tell me your favorite uBitx mods

Jack Purdum
 

I swear it was there not more than 15 minutes ago! Try this one: 282696028874

Jack, W8TEE



From: William R Maxwell <wrmaxwell@...>
To: BITX20@groups.io
Sent: Tuesday, January 2, 2018 11:19 PM
Subject: Re: [BITX20] Tell me your favorite uBitx mods

That eBay number isn't being found Jack. Could you check it please?
Bill, VK7MX

On 3/01/2018 2:41 PM, Jack Purdum via Groups.Io 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





Re: Tell me your favorite uBitx mods

MVS Sarma
 

You normally find these clauses across the item description.

 Then , one need not buy from that seller.

regards

 sarma

 vu3zmv


Item specifics

Condition:
New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ... Read moreabout the condition
Brand:

Unbranded/Generic

other: Lead free / RoHS Compliant Model:

TO-220

MPN:

Does Not Apply

UPC:

Does not apply


regards
Sarma
 

On Wed, Jan 3, 2018 at 10:00 AM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
I swear it was there not more than 15 minutes ago! Try this one: 282696028874

Jack, W8TEE



From: William R Maxwell <wrmaxwell@...>
To: BITX20@groups.io
Sent: Tuesday, January 2, 2018 11:19 PM

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

That eBay number isn't being found Jack. Could you check it please?
Bill, VK7MX

On 3/01/2018 2:41 PM, Jack Purdum via Groups.Io 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






Bitx40v3.5 exciter plus Qrp PA -prototype-

 

Hi colleagues
Here my version of the Bitx40v3 TH(throug hole)
I have tested the Qrp PA and it works excellent after fried two LPF 470 pF ($0.01) capacitor, one by one.
Now I want to test both together
I hope to get the same performance as other I have made.
Qrv's 
73's Jc

Re: Tell me your favorite uBitx mods

MVS Sarma
 

Jack,
  best of 2018 and success in your hobby times.Most members are enjoying your efforts.
 
The ebay at times, depending from where you log, doent' show some item numbers. I wonder whether the seller meant that item to certian countries.
I too did not get the item marke and checked by you.
 Example, here is an item where the seller marks  Brand as MITSUBISHI" selling at 1.49 bucks.

 pleasee whether you can be able to open that.  282593021343
regards
sarma
 vu3zmv



regards
Sarma
 

On Wed, Jan 3, 2018 at 10:05 AM, Mvs Sarma <mvssarma@...> wrote:

You normally find these clauses across the item description.

 Then , one need not buy from that seller.

regards

 sarma

 vu3zmv


Item specifics

Condition:
New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ... Read moreabout the condition
Brand:

Unbranded/Generic

other: Lead free / RoHS Compliant Model:

TO-220

MPN:

Does Not Apply

UPC:

Does not apply


regards
Sarma
 

On Wed, Jan 3, 2018 at 10:00 AM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
I swear it was there not more than 15 minutes ago! Try this one: 282696028874

Jack, W8TEE



From: William R Maxwell <wrmaxwell@...>
To: BITX20@groups.io
Sent: Tuesday, January 2, 2018 11:19 PM

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

That eBay number isn't being found Jack. Could you check it please?
Bill, VK7MX

On 3/01/2018 2:41 PM, Jack Purdum via Groups.Io 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







Re: Tell me your favorite uBitx mods

William R Maxwell
 

That one works.. The panel mount end seems overly large though. I wonder whether there are any smaller varities?


On 3/01/2018 3:30 PM, Jack Purdum via Groups.Io wrote:
I swear it was there not more than 15 minutes ago! Try this one: 282696028874

Jack, W8TEE



From: William R Maxwell <wrmaxwell@...>
To: BITX20@groups.io
Sent: Tuesday, January 2, 2018 11:19 PM
Subject: Re: [BITX20] Tell me your favorite uBitx mods

That eBay number isn't being found Jack. Could you check it please?
Bill, VK7MX

On 3/01/2018 2:41 PM, Jack Purdum via Groups.Io 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






Re: Tell me your favorite uBitx mods

George Baumann
 

This one might be smaller!
https://www.adafruit.com/product/3318

Re: Tell me your favorite uBitx mods

George Baumann
 

I got this cable off eBay and plan on using it!

https://www.ebay.com/itm/171894828565


uBitx AGC mod

Diver Martin <diver.martin@...>
 

Anyone here used the Harris AGC Circuit in a uBitx or bitx?  I was perusing the Bitx20 files for AGC ideas, and came across an 8-page portion of a book from 'Harris', that describes an AGC circuit. So... I naturally copied it verbatim, put it into a circuit block, and have it set and ready to go into my uBitx motherboard mod.  But, I'd like to do two things first.

1)  Anyone used a similar design?  Your design thoughts/etc please.
2) Build up a PCB of it (2-3 week turnaround) and test it out.

Before I do 2, I'd like your feedback on 1) please.

Thanks!

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

Re: Tell me your favorite uBitx mods

William R Maxwell
 

That's getting better.


On 3/01/2018 4:42 PM, George Baumann wrote:
This one might be smaller!
https://www.adafruit.com/product/3318

13.8 v on BITX 40 smd

Avijit
 

Hello folks,
if 13.8v DC is fed into the BITX 40 smd board then will it be damaged? 
73s,
Avi, VU2OWB

Proof-of-concept for community-driven uBITX sketch using Github/PlatformIO/Travis-CI

Neil Martinsen-Burrell
 

My uBitX arrived in the mail today and I found some time tonight to put together a sample of what is possible for developing our uBitX sketch on Github, similar to what Allard has done for the Bitx40. Farhan has indicated that he is looking for volunteers to help integrate patches (https://github.com/afarhan/ubitx/pull/1#issuecomment-354228971) and tools like Git, GitHub, and continuous integration can make that job much more manageable for whoever is doing it.

I forked Farhan's afarhan/ubitx Github repository at https://github.com/neilmb/ubitx-ng. As a proof of concept, I merged the two existing pull requests from Farhan's repository. Then I added some configuration for the PlatformIO tool that has been mentioned on this list before (https://github.com/neilmb/ubitx-ng/pull/3/commits/eb71a8a0d8abce1d45dd178b361b7b08ae537e3f). PlatformIO allows building Arduino sketches from the command line and it reports many more warnings and errors than the Arduino IDE (unused variables, incorrect return types, incorrect type casts, see https://github.com/neilmb/ubitx-ng/pull/3/commits/9c8d39f80052de53cc02b569ca19a2c48a202dd4).

Finally, I added configuration for the Travis-CI.org continuous integration tool. This service is free for open-source projects and watches Github for changes and runs a test suite for the new versions. A tool like this is crucial when welcoming contributions from others because it provides some basic assurances that the submitted code will at least compile. As an example, I configured a test that fails if the Arduino code has trailing whitespace (yuck; https://github.com/neilmb/ubitx-ng/pull/3/commits/cdc2808a3a87cd7c22dc6fee53b8b1f041ba3fe0).  You can see here https://travis-ci.org/neilmb/ubitx-ng/builds/324461590 that the build "failed" because there was trailing whitespace in Farhan's code, but another change in Git https://github.com/neilmb/ubitx-ng/pull/3/commits/90d2cca1fdc114dd7f73f0e542116f27d36047bb removed the problem and made the Travis build pass https://travis-ci.org/neilmb/ubitx-ng/builds/324462352.

I just wanted to do this to show what is possible with modern software engineering tools to make it easy and reliable for many people to contribute to the uBitX code. I'd happily welcome Ian Lee's pull request adding further CAT control code for the BitX, or W8TEE's change to actual .cpp files, or improvements to the keyer timing, or who knows what comes next! Then all of us together can be sure that the code meets the (minimal) standards that the community sets out before it gets merged with the "master" branch.

In my dream world, Farhan could keep shipping uBitX kits with the basic code from his afarhan/ubitx repository, while all of us together can iterate new features in a ubitx-ng repository. The hope would be that new builders would get a working radio, but the first thing we would encourage them to do is to get the latest and greatest code from ubitx-ng. Like Allard did with the bitx40, we would maintain hardware compatibility with the radio as delivered and people who wanted to make hardware modifications could make further changes in their own repositories. (Although K3NG has shown with his arduino keyer that many different configurations can be supported in one codebase with some additional effort.)

Thanks for reading this far, and I hope, whatever people decide, that uBitx firmware development will be rapid, reliable, long-lived, community-wide, and use modern software engineering tools, for all of our benefit.

-Neil N0FN

Re: Tell me your favorite uBitx mods

K9HZ <bill@...>
 

Sold out!


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 Jan 2, 2018, at 9:41 PM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:

I'm adding this to my development µBITX:

<USBMiniConnector.jpg>
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


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

Nigel
 

Greetings Alex from sunny South Africa :-)

Following your discussion and only now registered that your call sign familiar!  Wow - small world ;-)

Not yet received my uBitx so unable to make contribution to the conversation from a 'hands on' perspective but will ‎keep fingers crossed that resolution to all your challenges found soon.

‎Am sure we will chat again sometime in the future with perhaps the chance of a CW qso using R.F. being the medium?!?  hi hi!

73 de Nigel ZS6RN 

dit dit

Sent from my BlackBerry Passport 

Re: Variable power control

Clark Martin
 

Might be a problem with CW as caps in the boost converter will take time to charge up.

Clark Martin
KK6ISP

On Jan 2, 2018, at 7:42 PM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:

Maybe Jerry's idea of only boosting on TX would be the way to go in removing any hash.


Re: 13.8 v on BITX 40 smd

 

No Avi,

I have run it at 16V (max on that power supply). Add a bigger heat sink or mount IRF on back panel.

Raj, vu2zap

At 03-01-2018, you wrote:
Hello folks,
if 13.8v DC is fed into the BITX 40 smd board then will it be damaged?Â
73s,
Avi, VU2OWB

Re: 13.8 v on BITX 40 smd

Avijit
 

Sir,
Sorry, I have forget to mention about the main board supply. In fact I have fed the PA section with 24v dc and got around 20 watts of power. 
So, my question remains the same, "if 13.8 v is given to the MAIN BOARD of bitx 40 smd, then what will happen" ?
73s
Avi

On Wed, Jan 3, 2018 at 12:17 PM, Raj vu2zap <rajendrakumargg@...> wrote:
No Avi,

I have run it at 16V (max on that power supply). Add a bigger heat sink or mount IRF on back panel.

Raj, vu2zap

At 03-01-2018, you wrote:
>Hello folks,
>if 13.8v DC is fed into the BITX 40 smd board then will it be damaged?Â
>73s,
>Avi, VU2OWB





Re: 13.8 v on BITX 40 smd

sofiullah
 

Dear OM
The BITX designed concept on 13.2V but Linear Amplifier can be drive up to 28 volts as my exprience
de vu2kd
best 73s
Sofi

--



Re: uBitx AGC mod

K9HZ <bill@...>
 

From “Harris” ?


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 Jan 2, 2018, at 11:53 PM, Diver Martin <diver.martin@...> wrote:

Anyone here used the Harris AGC Circuit in a uBitx or bitx?  I was perusing the Bitx20 files for AGC ideas, and came across an 8-page portion of a book from 'Harris', that describes an AGC circuit. So... I naturally copied it verbatim, put it into a circuit block, and have it set and ready to go into my uBitx motherboard mod.  But, I'd like to do two things first.

1)  Anyone used a similar design?  Your design thoughts/etc please.
2) Build up a PCB of it (2-3 week turnaround) and test it out.

Before I do 2, I'd like your feedback on 1) please.

Thanks!

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