Topics

VK4PP uBitx LPF BANK add-on Board

RICHARD <k6kwq@...>
 

Not surprised at all, the number of hams that ignore the problem and operate any way

Bring back the wofhong

 

Sent from Mail for Windows 10

 


From: BITX20@groups.io <BITX20@groups.io> on behalf of dfine100@... <dfine100@...>
Sent: Sunday, September 2, 2018 12:38:34 PM
To: BITX20@groups.io
Subject: Re: [BITX20] VK4PP uBitx LPF BANK add-on Board
 
I would think that Farhan should put a disclaimer on the hfsigs website stating that the ubitx does not meet some countries (i.e. USA) specifications for legal operation and that it will take a considerable amount of modification to make it meet those specs.  I agree that most new hams buy it thinking all they have to do is connect a few cables and the have a legal ready to go transceiver, when in fact they could buy a used 100 watt transceiver for not much more money that would meet specs.  That's my $.02 opinion.
W0DF

Timothy Fidler
 

MRModder it is not so much a a mess. If they realise they cannot safely add an amp and they spin the dice as far as a letter from the FCC/SMA then the sun rises each morning much the same.  The issues for them will be overtaxed components,  vias not fully plated through and needing a soldered in copper stub  and such like.  I guess they did nto figure on getting component removal and SMD soldering skills when they signed up. Bit like the Army or Marines. have to Man up  and tool up   :-))  Perhaps  A F could put something like that in his advertising Spiel .. So saith Don Draper... Perhaps not.

Timothy E. Fidler : Engineer BE Mech(1) Auckland , NDT specialist AINDT UT /RT3 , MT2 
Telephone Whangarei   022  691 8405
e: Engstr@...



----- Original Message -----
From:
BITX20@groups.io

To:
<BITX20@groups.io>
Cc:

Sent:
Sun, 2 Sep 2018 08:07:13 -0500
Subject:
Re: [BITX20] VK4PP uBitx LPF BANK add-on Board


I suppose that does depend on a person’s skill at executing the myriad of expert opinions opined on this group.  I myself do this for a living so I’ve redesigned the entire radio.  That’s one end of the spectrum.  However there is the other end of the spectrum… the guy who may have just received his license and bought a uBITx thinking it was a nice cheap way to enter the world of HF that now has to deal with this (like some friends of mine).  They can either rely on the experts (self-proclaimed or otherwise) to bail them out of this mess or be given a very simple solution that is possible for them to execute.  “Hellish crude” in your own words for you… the only option for someone else.

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Timothy Fidler
Sent: Sunday, September 2, 2018 1:17 AM
To: BITX20@groups.io
Subject: Re: [BITX20] VK4PP uBitx LPF BANK add-on Board

 

All understood but it hellish crude for a radio which allegedly has push button RF operation selection.

 

Well it had it ....

 

Just too many design compromises made. If they had gone for 80 40/30 20 and Ten  mtrs   with four filters and a diode OR ..(given the limits ofthe Arduino ) all standard stuff ...the whole thing would never have happened. 

 

so it goes.

Timothy E. Fidler : Engineer BE Mech(1) Auckland , NDT specialist AINDT UT /RT3 , MT2 
Telephone Whangarei   022  691 8405
e: Engstr@...

 


----- Original Message -----

 

To:

<BITX20@groups.io>

Cc:

 

Sent:

Sun, 2 Sep 2018 01:06:02 -0500

Subject:

Re: [BITX20] VK4PP uBitx LPF BANK add-on Board

I just soldered female BCN connectors to the 4-pin DuPont connectors and plugged the DuPont connectors onto the filter(s)  I then use a double barrel male to connect the filter to the back of the radio.  It’s very simple.  I’m not currently at home or I could post a picture but I think you get the idea.  I suppose you could put this onto a small proto-board easily…or even use Kees board if you wanted to do something more official  This approach takes this whole spur removal well within the capabilities of even the person that barely knows which end of the soldering iron to hold.

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of mark bodlovich
Sent: Saturday, September 1, 2018 11:04 PM
To: BITX20@groups.io
Subject: Re: [BITX20] VK4PP uBitx LPF BANK add-on Board

 

Mad Radio Modder;
I'm interested in how you put the qrp labs filter board into the ubitx. I built one and have not put it in yet. Looking for good ideas. 
Thanks, Mark N7HWR

 

Virus-free. www.avg.com

 

--

…_. _._


Virus-free. www.avg.com

--

…_. _._

MadRadioModder
 

No sooner did I say that some folks will be challenged to correct the spur issues with surgery and internal boards… and low and behold !… KE4MIQ posts a very simple outboard filter board… exactly what I was talking about.  It’s not for everyone but it’s gonna work for some!

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Timothy Fidler
Sent: Sunday, September 2, 2018 6:43 PM
To: BITX20@groups.io
Subject: Re: [BITX20] VK4PP uBitx LPF BANK add-on Board

 

MRModder it is not so much a a mess. If they realise they cannot safely add an amp and they spin the dice as far as a letter from the FCC/SMA then the sun rises each morning much the same.  The issues for them will be overtaxed components,  vias not fully plated through and needing a soldered in copper stub  and such like.  I guess they did nto figure on getting component removal and SMD soldering skills when they signed up. Bit like the Army or Marines. have to Man up  and tool up   :-))  Perhaps  A F could put something like that in his advertising Spiel .. So saith Don Draper... Perhaps not.

Timothy E. Fidler : Engineer BE Mech(1) Auckland , NDT specialist AINDT UT /RT3 , MT2 
Telephone Whangarei   022  691 8405
e: Engstr@...

 


----- Original Message -----

 

To:

<BITX20@groups.io>

Cc:

 

Sent:

Sun, 2 Sep 2018 08:07:13 -0500

Subject:

Re: [BITX20] VK4PP uBitx LPF BANK add-on Board

I suppose that does depend on a person’s skill at executing the myriad of expert opinions opined on this group.  I myself do this for a living so I’ve redesigned the entire radio.  That’s one end of the spectrum.  However there is the other end of the spectrum… the guy who may have just received his license and bought a uBITx thinking it was a nice cheap way to enter the world of HF that now has to deal with this (like some friends of mine).  They can either rely on the experts (self-proclaimed or otherwise) to bail them out of this mess or be given a very simple solution that is possible for them to execute.  “Hellish crude” in your own words for you… the only option for someone else.

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Timothy Fidler
Sent: Sunday, September 2, 2018 1:17 AM
To: BITX20@groups.io
Subject: Re: [BITX20] VK4PP uBitx LPF BANK add-on Board

 

All understood but it hellish crude for a radio which allegedly has push button RF operation selection.

 

Well it had it ....

 

Just too many design compromises made. If they had gone for 80 40/30 20 and Ten  mtrs   with four filters and a diode OR ..(given the limits ofthe Arduino ) all standard stuff ...the whole thing would never have happened. 

 

so it goes.

Timothy E. Fidler : Engineer BE Mech(1) Auckland , NDT specialist AINDT UT /RT3 , MT2 
Telephone Whangarei   022  691 8405
e: Engstr@...

 


----- Original Message -----

 

To:

<BITX20@groups.io>

Cc:

 

Sent:

Sun, 2 Sep 2018 01:06:02 -0500

Subject:

Re: [BITX20] VK4PP uBitx LPF BANK add-on Board

I just soldered female BCN connectors to the 4-pin DuPont connectors and plugged the DuPont connectors onto the filter(s)  I then use a double barrel male to connect the filter to the back of the radio.  It’s very simple.  I’m not currently at home or I could post a picture but I think you get the idea.  I suppose you could put this onto a small proto-board easily…or even use Kees board if you wanted to do something more official  This approach takes this whole spur removal well within the capabilities of even the person that barely knows which end of the soldering iron to hold.

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of mark bodlovich
Sent: Saturday, September 1, 2018 11:04 PM
To: BITX20@groups.io
Subject: Re: [BITX20] VK4PP uBitx LPF BANK add-on Board

 

Mad Radio Modder;
I'm interested in how you put the qrp labs filter board into the ubitx. I built one and have not put it in yet. Looking for good ideas. 
Thanks, Mark N7HWR

 

Virus-free. www.avg.com

 

--

…_. _._

 

Virus-free. www.avg.com

 

--

…_. _._


Virus-free. www.avg.com

--

…_. _._

Gordon Gibby <ggibby@...>
 

Nice setup !!
Gordon



On Sep 2, 2018, at 21:09, Kees T <windy10605@...> wrote:

Here is what all 4 uBITX LPFs look like as plug-ins. Note that the 6x LPF board is arranged to where you can cut off 1 or 2 of the LPF/BPF positions with no ill effect.

73 Kees K5BCQ<MVC_011S.JPG>

W0PWE
 

Kees - With 6 filters is the plan as follows?
LPF1 = 80M
LPF2 = 40M and 30M
LPF3 = 20M and 17M
LPF4 = 15M
LPF5 = 12M
LPF6 = 10M

Nick VK4PP
 

Ok, just adding a bit in here from my side:
Relay 1-3 are triggered using the existing 3904s onboard.
Relay 4 is a drived via a new 3904 and an extra digital I/O.
Firmware changes will be needed regardless as its one output on at a time per filter.

Added 100uh smd inductors for RF filtering.
If you all like it so far. I will make 10, and happy to post to a few of you with test equipment at no cost, please contact me if you want one.




73 Nick VK4PP

Nick VK4PP
 

The ideas is to use exiting LPFs as is, with the option to add a fifth if you so chose, 160m... or better 10m....

But mainly better lay out and separate relays...
I will provide a code snip-it for replacing the section in the original/KD8CEC FW for use with this board.

Kees, I am happy to combine efforts/butt out if you feel having 2 board options will confuse things, please contact me if you want to chat about this off-line...

73 Nick VK4PP

Lawrence Galea
 


On Mon, Sep 3, 2018 at 12:02 AM RICHARD <k6kwq@...> wrote:

Not surprised at all, the number of hams that ignore the problem and operate any way

Bring back the wofhong

 

Sent from Mail for Windows 10

 


From: BITX20@groups.io <BITX20@groups.io> on behalf of dfine100@... <dfine100@...>
Sent: Sunday, September 2, 2018 12:38:34 PM
To: BITX20@groups.io
Subject: Re: [BITX20] VK4PP uBitx LPF BANK add-on Board
 
I would think that Farhan should put a disclaimer on the hfsigs website stating that the ubitx does not meet some countries (i.e. USA) specifications for legal operation and that it will take a considerable amount of modification to make it meet those specs.  I agree that most new hams buy it thinking all they have to do is connect a few cables and the have a legal ready to go transceiver, when in fact they could buy a used 100 watt transceiver for not much more money that would meet specs.  That's my $.02 opinion.
W0DF

Nick VK4PP
 

Ok.
Ive ordered 10 boards for testing.

I will also try to get it working in combintation with a QRP-Labs relay board and BPF in the 30Mhz LPF spot for spur reduction.

Effectively turning it into a 5 band radio. 80/40/20/15/10, as per band pass filters. and then the new LPF board for Harmonics.

At this point just reusing the existing LPF filters, but I suppose you can match them to your BPFs for better harmonic response on each band....

Thoughts?
 

Timothy Fidler
 

J1 AB are selected on zero power on relay control . Would it not make more sense for silk screening to have 15/17/20 as the no power relay ie  for daylight Sota where you want zero extra power draw and the 10/12 definition moves one block down.

IS there enough clearance to RH side of control pin line to allow a modular green plastic block header ?? - side entry to be used. This means the board can easily be disconnected and makes it all modular and professional. People make elect to go cheap an nasty on the final defacto  build but if the posn physically    clashes with the diode line so the header will not sit flush then they have no choice.  I raised this earlier with a reference to an Altronics OZ  part page. 


Suggest provide schematic to show how the new 2n3904 Tranny  fits in scheme of things.  
TEF

Nick VK4PP
 

Thanks TIm,
I will see if Molex headers fit as per the rest of the uBitx...

Nick VK4PP
 

OK, an economy version!
Only 4 filters, re-use the K3 relay.
compatible with KD8CEC firmware 1.1





73 Nick VK4PP

iz oos
 

Hi, would it be compatible with the stock firmware too (I have uBitx ver 3)?


Il 13/set/2018 03:00, "Nick VK4PP" <nickpullen@...> ha scritto:
OK, an economy version!
Only 4 filters, re-use the K3 relay.
compatible with KD8CEC firmware 1.1





73 Nick VK4PP

Ripley
 

Hello Kees,

How much for the four filter circuit board?

Thank you
Ripley
KD8UYQ

The words are mine but this iPad does what it will with them.

On Sep 12, 2018, at 9:00 PM, Nick VK4PP <nickpullen@...> wrote:

OK, an economy version!
Only 4 filters, re-use the K3 relay.
compatible with KD8CEC firmware 1.1

<VK4PP uBitx LPF v05 _ 4 Filter.PNG>

<KD8CEC Custom filters.PNG>

73 Nick VK4PP

nemfield <nemfield@...>
 

Hi Nick;
As far as how it looks. Awesome !. Can I please get two of them. :-)

Nick VK4PP
 

Ok, SO just got some test results back from Warren.
Look like the bare PCB has excellent isolation between input and output, 90db.

I think matches with RF rated relays and separate in/out relays this board will perform very well:
Here is an updated pic, a few tweaks, more ground stitching.

Only downside is the $1.50 relays (x8)
reuse K3(or not) or get an AXICOM relay.
Maybe Ill just change to using omron G6 in the TX/RX relay too..

Buy 10 on ebay and have a spare?

Thoughts? 

74 NIck VK4PP

Nick VK4PP
 

Hi Again.
Here is the supplier and the relays I have purchased. they appear to be good at a reasonable price

10PCS G6S-2-12VDC 12VDC ORIGINAL OMRON Relay 8pins https://ebay.us/ARjWhq

10 pack so perfect for this LPF board.

I am gauging interest right now, to determine if I should do a big order of these boards?

Otherwise I have about 5 of them left from the prototype run and also 5 of the 5 filter version, email me if you want them($2) + post.

73 Nick VK4PP

V Zecchinelli
 

I'd be very interested Nick.  I can paypal whenever you are ready.
Thanks,
73 Vince N1VIN


On 10/21/2018 11:12 PM, Nick VK4PP wrote:

Hi Again.
Here is the supplier and the relays I have purchased. they appear to be good at a reasonable price

10PCS G6S-2-12VDC 12VDC ORIGINAL OMRON Relay 8pins https://ebay.us/ARjWhq

10 pack so perfect for this LPF board.

I am gauging interest right now, to determine if I should do a big order of these boards?

Otherwise I have about 5 of them left from the prototype run and also 5 of the 5 filter version, email me if you want them($2) + post.

73 Nick VK4PP


stephen.hardesty@...
 

I would like one of the 4-filter boards; please advise cost and PP info.

73, Steve KD8INK

Black Wolfe
 

Put me down for a production board.
Bruce W.
KV4OE

On 10/21/2018 11:12 PM, Nick VK4PP wrote:
Hi Again.
Here is the supplier and the relays I have purchased. they appear to be good at a reasonable price
10PCS G6S-2-12VDC 12VDC ORIGINAL OMRON Relay 8pins https://ebay.us/ARjWhq
10 pack so perfect for this LPF board.
I am gauging interest right now, to determine if I should do a big order of these boards?
Otherwise I have about 5 of them left from the prototype run and also 5 of the 5 filter version, email me if you want them($2) + post.
73 Nick VK4PP
_._,_._,_
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