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OOPS!! Re-factory alignment....

Gordon Gibby
 

¿ªÔÆÌåÓý


This is not extraordinarily accurate information here.? ?


By some unknown manner, while fiddling with the uBitx today and trying various digital modes.....I accidentally entered "factory alignment" and since I hadn't even read anything about it, I suspect I fouled it up royally.? ?Transmitted signals were no longer "right on frequency".? ?


Approximate settings that might help someone with even less test equipment than *I* have were the following:

1st setting:? 10.000 MHz adjustment was on target at? "15"

2nd setting:? my best guess at when the 7.150 MHz LSB signal (generated by a vacuum tube radio driven by another raduino) was when the last digits were 96.7


At that point I was able to hit other WINLINK servers on 40 meters with less than 10 Hz apparent error.? ?(you only have to be within 200 Hz).? ?



However, it took 3 tries to get to there, as the first go-round was more like 50 Hz off on 40 and twice that on 20m.



I was a bit "agitated" and in a hurry so I haven't studied Ashhar's routines and don't fully understand the purpose of each of his tests.? ?(A "manual" for factory alignment would be wonderful....)? ? Others may do a far better job explaining all this.? ?I haven't yet gotten the bravery to upload a sketch to this wonderful machine yet, as I have for the bitx40.? ?A brief listen to the 25 MHz oscillator (without driving the output freq to that, which would have made the signal a LOT stronger) --- it does seem to be about 4kHz high as we noted on bitx40 raduinos.? ?


Hope this helps any other hapless people.....


AND IF YOU ARE GOING TO DRIVE THE USB PORT OF THE RADUINO, PUT FERRITES ON THE INTERCONNECTING CABLE TO YOUR COMPUTER!!!!? ? That made a HUGE improvement in the quality of the signal my little uBitx was creating.


Cheers,


gordon

??
Re: #ubitx and power supply connection #ubitx

 

Thanks for the heads up!? I'm really looking forward to everything I'm going to learn through this....:)
Tom
AB7WT
Re: #ubitx and power supply connection #ubitx

 

It may work IF you add enough filtering.? As it is, I imagine you'll get a LOT of AC hum mixed in with both your receive and transmit audio & I don't know what other effects you may encounter.

Good luck with your project.
Re: ubitx example of enclosure

Jack Purdum
 

What's its diameter?

Jack, W8TEE


From: Thomas Sharka via Groups.Io <sharkatw@...>
To: [email protected]
Sent: Saturday, December 30, 2017 2:23 PM
Subject: Re: [BITX20] ubitx example of enclosure

Thanks Shawn, the project still needs a few touches here and there and I think I'm going to cut up some double-sided PC board for the front and back. I found an eBay seller that has a Collins style knob for the tuner.

The extended edges are a feature of the project box that I got from Aliexpress and the uBITX just shoehorns into it.

It's a work in progress, but I think it'll pull together nicely.

73




?


Sent from Yahoo Mail.


On Saturday, December 30, 2017 1:03 PM, Shawn Reed via Groups.Io <sreedq1014@...> wrote:


Hi Thomas.
I really like your use of material for the inside corners, on the front. And the extended front edges -? look good! Thank you for sharing that photo.
73, Shawnr. kf7yff.



--------------------------------------------
On Sat, 12/30/17, Thomas Sharka via Groups.Io <sharkatw=[email protected]> wrote:

Subject: Re: [BITX20] ubitx example of enclosure
Date: Saturday, December 30, 2017, 9:41 AM

?I
know that feeling. It usually takes me one or two tries to
get things where I want them...

Sent
from Yahoo Mail. Get the
app

? ? On Saturday, December
30, 2017 12:13 PM, Shawn Reed via Groups.Io
<sreedq1014=[email protected]> wrote:
?

? Hello Ken. I checked out your web
page. Saw the case makings of yours? for the Tut Hill on
one of your project pages. Nice. I have two of these radios
collected. One with the factory case - 80M. The other I aim
to build it's case custom. Even as far as the symbols,
too generic. Looking at your fabricated ubitx enclosure,
could you tell me how to avoid such a gap - snag - in your
upper right corner of the lid? I, myself would have trouble
living with that. Case building is but one aspect of amature
radio, and not always the objective, pursuant of. Neither,
is it necessarily,? a "case" of agony to display.
Sometime, though, all I am interested in is the enclosure,
and the accommodations needed to consider, in?design,?for
the circuitry inside.

?This paragraph of yours was in the
page presentation.....??
"Making your projects look presentable, is not
an absolute necessity. Some even prefer the rustic look of
their projects and see it as a ¡°red badge of courage¡±,
showing the agony of their efforts. After all, scotch tape
and a penciled label can? identify just about anything, or
merely writing on the chassis. Having said that, there is a
very small group of hams that like to see their projects
look like they were done on purpose. I will try to address
that group".
?
Thank you for the tips. I cut with a most
ancient tool, but sharpest edge available. Be that obsidian.
Great joy in crafting something with one's own
imagination, every now and then - a must.
????????????????????????????????????????????????????????????????????
73, Shawnr. kf7yff




?
?







Re: ubitx example of enclosure

 

Thanks Shawn, the project still needs a few touches here and there and I think I'm going to cut up some double-sided PC board for the front and back. I found an eBay seller that has a Collins style knob for the tuner.

The extended edges are a feature of the project box that I got from Aliexpress and the uBITX just shoehorns into it.

It's a work in progress, but I think it'll pull together nicely.

73




?


Sent from Yahoo Mail.


On Saturday, December 30, 2017 1:03 PM, Shawn Reed via Groups.Io <sreedq1014@...> wrote:


Hi Thomas.
I really like your use of material for the inside corners, on the front. And the extended front edges -? look good! Thank you for sharing that photo.
73, Shawnr. kf7yff.



--------------------------------------------

On Sat, 12/30/17, Thomas Sharka via Groups.Io <sharkatw=[email protected]> wrote:

Subject: Re: [BITX20] ubitx example of enclosure
Date: Saturday, December 30, 2017, 9:41 AM

?I
know that feeling. It usually takes me one or two tries to
get things where I want them...

Sent
from Yahoo Mail. Get the
app

? ? On Saturday, December
30, 2017 12:13 PM, Shawn Reed via Groups.Io
<sreedq1014=[email protected]> wrote:
?

? Hello Ken. I checked out your web
page. Saw the case makings of yours? for the Tut Hill on
one of your project pages. Nice. I have two of these radios
collected. One with the factory case - 80M. The other I aim
to build it's case custom. Even as far as the symbols,
too generic. Looking at your fabricated ubitx enclosure,
could you tell me how to avoid such a gap - snag - in your
upper right corner of the lid? I, myself would have trouble
living with that. Case building is but one aspect of amature
radio, and not always the objective, pursuant of. Neither,
is it necessarily,? a "case" of agony to display.
Sometime, though, all I am interested in is the enclosure,
and the accommodations needed to consider, in?design,?for
the circuitry inside.

?This paragraph of yours was in the
page presentation.....??
"Making your projects look presentable, is not
an absolute necessity. Some even prefer the rustic look of
their projects and see it as a ¡°red badge of courage¡±,
showing the agony of their efforts. After all, scotch tape
and a penciled label can? identify just about anything, or
merely writing on the chassis. Having said that, there is a
very small group of hams that like to see their projects
look like they were done on purpose. I will try to address
that group".
?
Thank you for the tips. I cut with a most
ancient tool, but sharpest edge available. Be that obsidian.
Great joy in crafting something with one's own
imagination, every now and then - a must.
????????????????????????????????????????????????????????????????????
73, Shawnr. kf7yff




?
?





Re: Tuner? Well Sure!

 

Hfsignals is an enterprise model that is radical. Instead of building more into hfsignala, i would encourage members to try something similar in their own countries and neighbourhoods. Ham radio is small enough a market to not attract big players.
?Low volume, low cost production units are easily organized with small communities. There are smd pick and place machines like th T220 available for a few thousand dollars. Mouser and digikey ship any amount of compoments from around the world for a few dollars. Makers, homebrewers need to grasp this moment and create value.
So, take the plunge!
Have a great 2018, all. Here is hoping for a better world, f.

On 30 Dec 2017 9:04 pm, "Lawrence Galea" <9h1avlaw@...> wrote:
You can count me in.
A 160M addition would encourage more operators to try this band which is also my favourite.

While at it, would it be possible to include 630M??
Although I am not sure that the ¦Ìbitx could be persuaded to tx down there with an additional LPF/BPF it would make more operators try the band.

Couple of quotes from emails.

"I actually changed the lowest frequency to 100000L. I want to see if 2200M will work, also. My antenna will never tune to these frequencies, but I want to see if I can hear anything....?KG5PRT"

"Group,?With a filter front end and a small preamp I was able to hear a NDB beacon at 209.00KHz with my Ubitx. the readout read something like 2.09.059...this was a stock UBitx...Hope this helps! Mike WA3O "

So it may be feasible.

Thanks and regards
Lawrence

On Sat, Dec 30, 2017 at 9:30 AM, K9HZ <bill@...> wrote:

MFJ.? Huh. Glad to see them using science for a change.

?

I¡¯m a little old school when it comes to RF design, and particularly with matching circuits like a tuner.? The best tuners I¡¯ve ever owned were military tuners¡­ specifically the old Collins 601 and the Harris RF-2601 devices.? If you are a study of these devices you know that the control circuits for the tuners operated essentially transform space with phase and amplitude information to effectively minimize SWR by determining the right transform to make the input see a purely resistive load.? Is that hard to do?? Nope.? You just have to think in a different coordinate system.? Rather than go into several pages of background here, for those interested¡­ there is a wonderful and complete chapter on this very subject in Sabin & Schoenike¡¯s book ¡°Single Sideband Systems and Circuits¡±, Chapter 16.? This book is a must for the serious RF designer.? You can get it off Amazon.? Other chapters in the book will answer questions like why you don¡¯t see grounded gate power amplifiers (a recent topic here), and why the very best IMD and linearity in an RF amplifier comes from a tube design in grounded screen configuration (common in broadcast transmitters¡­ the cathode is at minus screen potential!).? Yikes!

?

I¡¯ll put together a paper on the various loads the tuner will match once I have all of the calculations done.? Off the top of my head, it should match real impedances of 2ohms-10Kohms and reactances of +/-8Kohms.? I¡¯ve configured the capacitor bank to sit on either side of the inductor to complete the entire transform space (read that work for those really low impedance antennas that are usually not covered by antenna tuners).

?

The hardware for me is a breeze¡­ what is not so easy for me is figuring out the Raduino side¡­ for display and setting¡­ like Power, SWR, Bypass, frequency for memories, etc.? I may just build in all these things and ask someone else who is more familiar with the uBITx code to help out.? I have decided to make the tuner an I2C device though¡­so that should help with the communications.? I originally was gonna use RS232 (makes it work with a lot of other radios then too¡­ and even stand-alone) I2C is better for integration.

?

I should have the hardware drawings dome tomorrow¡­

?

?

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

?

Owner - Operator

Big Signal Ranch ¨C K9ZC

Staunton, Illinois

?

Owner ¨C Operator

Villa Grand Piton ¨C J68HZ

Soufriere, St. Lucia W.I.

Rent it:

Like us on Facebook!

?

?

email:? bill@...

?

From: [email protected] [mailto:[email protected]] On Behalf Of Gordon Gibby
Sent: Friday, December 29, 2017 6:37 PM
To: [email protected]
Subject: Re: [BITX20] Tuner? Well Sure!

?

If you guys can come up with something that works, it might provide a chance for Asher to provide employment for many many more people.

?

Remember the most recent MFJ products measure impedance and use smith chart type calculations to predict the solution in jump to it quicker. ??

?

?

But that is not at all beyond the capabilities of many on this forum.

?



Sent from my iPhone


On Dec 29, 2017, at 19:25, bill richardson <ng1p.bill@...> wrote:

I have been wondering about an internal tuner for my uBitx and/or my BITX40¡¯s. This sounds great please count me in on one.. love to see enough inductance to work on 160m also maybe a mod a future design.

thanks Bill ng1p


Re: Weird magic smoke...

Michael Davis
 

The supplied pot wiring is shown on the wire it up photo. If you have gone with the 10 turn pot the center tab is no longer the wiper. See the 10 turn pot specs (if you are using one) on the manufacturer web site.

Sent from Mike's iPad WA1MAD
Re: Additional uBitx specs

 

¿ªÔÆÌåÓý

Thanks John and Dave.

Mike

K5ESS

?

From: [email protected] [mailto:[email protected]] On Behalf Of John T.
Sent: Saturday, December 30, 2017 6:50 AM
To: [email protected]
Subject: Re: [BITX20] Additional uBitx specs

?

Check out.

Re: what else should I order from there? #parts

Vince Vielhaber
 

They (adafruit) have knobs that fit that pot and also a rather large knob designed for a rotary encoder - has the finger dent in the front.

Vince.

On 12/30/2017 10:30 AM, Doug W wrote:

I have a suggestion when someone suggests a vendor. The idea
came to me when Vince found a 1/4" shaft audio pot (great find
by the way).


/
On Fri, Dec 29, 2017 at 03:39 pm, Vince Vielhaber wrote:/


/Just heard back from Adafruit. This pot:
for $1.50 is an audio
taper and has a 6mm shaft (1/4" is 6.35mm)./

I've never ordered from adafruit because for the longest time
they wouldn't ship usps to me so the shipping was a killer. I
see they finally will ship usps. What else should I buy from
them? I'm not talking about the standards I can find anywhere
but it seems like each vendor has a few things that are very
difficult to source anywhere else. An example would be the M7
nuts for the chinese encoders that Jameco seems to have the
market cornered on. Like most of us I have paid more in
shipping than the part costs just to get something I need only
to remember a day later I should have ordered something else
or spent more time filling my cart on Tayda to hit $5 than it
took to find what I was looking for in the first place. So my
suggestion is this, if you are naming a vendor try to also
list a few things that are great cart fillers or hard to find
anywhere else. I realize with everyone chasing different
projects this isn't always practical or useful, but it might be.

--
Michigan VHF Corp.

Re: uBITx fabricated pcb chassis #ubitx

Vince Vielhaber
 

I got 2 - 24x18" sheets from Dupont for free as samples. That was their standard sample size! On one of the FB electronic groups someone posted a link to where to get it. The Dupont rep was more than helpful in selecting the right stuff to get - there were MANY combinations. Copper thickness, type, bonding, ...

Vince.

On 12/30/2017 09:34 AM, Ken wa4mnt wrote:
I've bought most of mine at hamfests. eBay is also a good source, and
McMaster Carr sells 2' x 3' sheet of double sided 1/16" for $48. That's
7x more than you need for this project, but if you continue making
chassis for other projects, it may be viable.

ken - wa4mnt
--
Michigan VHF Corp.

Re: ubitx example of enclosure

 

Hi Thomas.
I really like your use of material for the inside corners, on the front. And the extended front edges - look good! Thank you for sharing that photo.
73, Shawnr. kf7yff.



--------------------------------------------

On Sat, 12/30/17, Thomas Sharka via Groups.Io <sharkatw@...> wrote:

Subject: Re: [BITX20] ubitx example of enclosure
To: [email protected]
Date: Saturday, December 30, 2017, 9:41 AM

?I
know that feeling. It usually takes me one or two tries to
get things where I want them...

Sent
from Yahoo Mail. Get the
app

On Saturday, December
30, 2017 12:13 PM, Shawn Reed via Groups.Io
<sreedq1014@...> wrote:


Hello Ken. I checked out your web
page. Saw the case makings of yours? for the Tut Hill on
one of your project pages. Nice. I have two of these radios
collected. One with the factory case - 80M. The other I aim
to build it's case custom. Even as far as the symbols,
too generic. Looking at your fabricated ubitx enclosure,
could you tell me how to avoid such a gap - snag - in your
upper right corner of the lid? I, myself would have trouble
living with that. Case building is but one aspect of amature
radio, and not always the objective, pursuant of. Neither,
is it necessarily,? a "case" of agony to display.
Sometime, though, all I am interested in is the enclosure,
and the accommodations needed to consider, in?design,?for
the circuitry inside.

?This paragraph of yours was in the
page presentation.....??
"Making your projects look presentable, is not
an absolute necessity. Some even prefer the rustic look of
their projects and see it as a ¡°red badge of courage¡±,
showing the agony of their efforts. After all, scotch tape
and a penciled label can? identify just about anything, or
merely writing on the chassis. Having said that, there is a
very small group of hams that like to see their projects
look like they were done on purpose. I will try to address
that group".
?
Thank you for the tips. I cut with a most
ancient tool, but sharpest edge available. Be that obsidian.
Great joy in crafting something with one's own
imagination, every now and then - a must.
????????????????????????????????????????????????????????????????????
73, Shawnr. kf7yff
Re: ubitx example of enclosure

 

?I know that feeling. It usually takes me one or two tries to get things where I want them...


Sent from Yahoo Mail.


On Saturday, December 30, 2017 12:13 PM, Shawn Reed via Groups.Io <sreedq1014@...> wrote:


Hello Ken. I checked out your web page. Saw the case makings of yours? for the Tut Hill on one of your project pages. Nice. I have two of these radios collected. One with the factory case - 80M. The other I aim to build it's case custom. Even as far as the symbols, too generic. Looking at your fabricated ubitx enclosure, could you tell me how to avoid such a gap - snag - in your upper right corner of the lid? I, myself would have trouble living with that. Case building is but one aspect of amature radio, and not always the objective, pursuant of. Neither, is it necessarily,? a "case" of agony to display. Sometime, though, all I am interested in is the enclosure, and the accommodations needed to consider, in?design,?for the circuitry inside.

?This paragraph of yours was in the page presentation.....??
"Making your projects look presentable, is not an absolute necessity. Some even prefer the rustic look of their projects and see it as a ¡°red badge of courage¡±, showing the agony of their efforts. After all, scotch tape and a penciled label can? identify just about anything, or merely writing on the chassis. Having said that, there is a very small group of hams that like to see their projects look like they were done on purpose. I will try to address that group".
?
Thank you for the tips. I cut with a most ancient tool, but sharpest edge available. Be that obsidian. Great joy in crafting something with one's own imagination, every now and then - a must.
???????????????????????????????????????????????????????????????????? 73, Shawnr. kf7yff


IMG_20171230_123319.jpg

ubitx example of enclosure

 

Hello Ken. I checked out your web page. Saw the case makings of yours? for the Tut Hill on one of your project pages. Nice. I have two of these radios collected. One with the factory case - 80M. The other I aim to build it's case custom. Even as far as the symbols, too generic. Looking at your fabricated ubitx enclosure, could you tell me how to avoid such a gap - snag - in your upper right corner of the lid? I, myself would have trouble living with that. Case building is but one aspect of amature radio, and not always the objective, pursuant of. Neither, is it necessarily,? a "case" of agony to display. Sometime, though, all I am interested in is the enclosure, and the accommodations needed to consider, in?design,?for the circuitry inside.


?This paragraph of yours was in the page presentation.....??

"Making your projects look presentable, is not an absolute necessity. Some even prefer the rustic look of their projects and see it as a ¡°red badge of courage¡±, showing the agony of their efforts. After all, scotch tape and a penciled label can? identify just about anything, or merely writing on the chassis. Having said that, there is a very small group of hams that like to see their projects look like they were done on purpose. I will try to address that group".
?
Thank you for the tips. I cut with a most ancient tool, but sharpest edge available. Be that obsidian. Great joy in crafting something with one's own imagination, every now and then - a must.
???????????????????????????????????????????????????????????????????? 73, Shawnr. kf7yff
Re: Connection test between uBITX and digital communication program via cat communication #ubitx

 

Ahh. New sw thats the resolution to my problem!!! Did manage te do something via cat with the original sw but got strange errors on uBitx. Cant wait
Re: Weird magic smoke...

 

You almost certainly have your tuning pot wired up wrong.
Wires into the pot include 5v, ground, and the wiper goes into a Raduino analog input pin.
You likely have the wiper wired up to 5v.
When the pot is turned such that the wiper is close to ground, the resistance approaches 0 ohms and current approaches infinite.
(Alternately, you have the wiper wired up to ground, and it smokes when you turn the wiper close to 5v.)

Probably time to order a new pot, though it might still sort of work.
Check the pot out with your ohmmeter before soldering it up, make sure you understand how it works.



On Sat, Dec 30, 2017 at 08:19 am, Michael Hagen wrote:

You must be shorting a power line thru your Pot?? Pot draws lots of current, smokes, and PS current limits.

?
Re: Weird magic smoke...

 

¿ªÔÆÌåÓý

You must be shorting a power line thru your Pot?? Pot draws lots of current, smokes, and PS current limits.

Don't keep doing it.? BitX is too Young to Smoke!

73's

Mike, WA6ISP




On 4/16/2017 7:21 PM, Daniel Kuecker wrote:

Hello World!

I just wired my BitX40 and was ready to test out the receive. everything seemed right, LCD show the freq. and there was sound. when I tune the dial up, it goes up, then I tune down, seems good. Except, one the dial hit the low end, the dial started smoking and the radio power fluxed. I quickly removed power, double checked wiring, and tried it again. Same result. Once I hit the low end of dial, smoke from dial. Any ideas? I know basic electronics and nowhere near competent levels ;-) Any advice?


Thanks de K0KIK


-- 
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID  "MotDog@..."
Mike@...
BitX Radios Reunion on the Bench, WB5YYM, KM4YEC, and visiting with W7RLF

 

How many times does a BitX40 that you had a Sunday nite QSO with drop in on your bench?



All of these will be on display in Morristown TN next week.
Re: Tuner? Well Sure!

 

You can count me in.
A 160M addition would encourage more operators to try this band which is also my favourite.

While at it, would it be possible to include 630M??
Although I am not sure that the ¦Ìbitx could be persuaded to tx down there with an additional LPF/BPF it would make more operators try the band.

Couple of quotes from emails.

"I actually changed the lowest frequency to 100000L. I want to see if 2200M will work, also. My antenna will never tune to these frequencies, but I want to see if I can hear anything....?KG5PRT"

"Group,?With a filter front end and a small preamp I was able to hear a NDB beacon at 209.00KHz with my Ubitx. the readout read something like 2.09.059...this was a stock UBitx...Hope this helps! Mike WA3O "

So it may be feasible.

Thanks and regards
Lawrence

On Sat, Dec 30, 2017 at 9:30 AM, K9HZ <bill@...> wrote:

MFJ.? Huh. Glad to see them using science for a change.

?

I¡¯m a little old school when it comes to RF design, and particularly with matching circuits like a tuner.? The best tuners I¡¯ve ever owned were military tuners¡­ specifically the old Collins 601 and the Harris RF-2601 devices.? If you are a study of these devices you know that the control circuits for the tuners operated essentially transform space with phase and amplitude information to effectively minimize SWR by determining the right transform to make the input see a purely resistive load.? Is that hard to do?? Nope.? You just have to think in a different coordinate system.? Rather than go into several pages of background here, for those interested¡­ there is a wonderful and complete chapter on this very subject in Sabin & Schoenike¡¯s book ¡°Single Sideband Systems and Circuits¡±, Chapter 16.? This book is a must for the serious RF designer.? You can get it off Amazon.? Other chapters in the book will answer questions like why you don¡¯t see grounded gate power amplifiers (a recent topic here), and why the very best IMD and linearity in an RF amplifier comes from a tube design in grounded screen configuration (common in broadcast transmitters¡­ the cathode is at minus screen potential!).? Yikes!

?

I¡¯ll put together a paper on the various loads the tuner will match once I have all of the calculations done.? Off the top of my head, it should match real impedances of 2ohms-10Kohms and reactances of +/-8Kohms.? I¡¯ve configured the capacitor bank to sit on either side of the inductor to complete the entire transform space (read that work for those really low impedance antennas that are usually not covered by antenna tuners).

?

The hardware for me is a breeze¡­ what is not so easy for me is figuring out the Raduino side¡­ for display and setting¡­ like Power, SWR, Bypass, frequency for memories, etc.? I may just build in all these things and ask someone else who is more familiar with the uBITx code to help out.? I have decided to make the tuner an I2C device though¡­so that should help with the communications.? I originally was gonna use RS232 (makes it work with a lot of other radios then too¡­ and even stand-alone) I2C is better for integration.

?

I should have the hardware drawings dome tomorrow¡­

?

?

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

?

Owner - Operator

Big Signal Ranch ¨C K9ZC

Staunton, Illinois

?

Owner ¨C Operator

Villa Grand Piton ¨C J68HZ

Soufriere, St. Lucia W.I.

Rent it:

Like us on Facebook!

?

?

email:? bill@...

?

From: [email protected] [mailto:[email protected]] On Behalf Of Gordon Gibby
Sent: Friday, December 29, 2017 6:37 PM
To: [email protected]
Subject: Re: [BITX20] Tuner? Well Sure!

?

If you guys can come up with something that works, it might provide a chance for Asher to provide employment for many many more people.

?

Remember the most recent MFJ products measure impedance and use smith chart type calculations to predict the solution in jump to it quicker. ??

?

?

But that is not at all beyond the capabilities of many on this forum.

?



Sent from my iPhone


On Dec 29, 2017, at 19:25, bill richardson <ng1p.bill@...> wrote:

I have been wondering about an internal tuner for my uBitx and/or my BITX40¡¯s. This sounds great please count me in on one.. love to see enough inductance to work on 160m also maybe a mod a future design.

thanks Bill ng1p


what else should I order from there? #parts

 

I have a suggestion when someone suggests a vendor.? The idea came to me when Vince found a 1/4" shaft audio pot (great find by the way).

On Fri, Dec 29, 2017 at 03:39 pm, Vince Vielhaber wrote:
Just heard back from Adafruit. This pot: for $1.50 is an audio taper and has a 6mm shaft (1/4" is 6.35mm).

I've never ordered from adafruit because for the longest time they wouldn't ship usps to me so the shipping was a killer.? I see they finally will ship usps.?? What else should I buy from them?? I'm not talking about the standards I can find anywhere but it seems like each vendor has a few things that are very difficult to source anywhere else.? An example would be the M7 nuts for the chinese encoders that Jameco seems to have the market cornered on.? Like most of us I have paid more in shipping than the part costs just to get something I need only to remember a day later I should have ordered something else or spent more time filling my cart on Tayda to hit $5 than it took to find what I was looking for in the first place.? So my suggestion is this, if you are naming a vendor try to also list a few things that are great cart fillers or hard to find anywhere else.? I realize with everyone chasing different projects this isn't always practical or useful, but it might be.
Re: Tuner? Well Sure!

Jack Purdum
 

I just ordered one and intend to integrate it with my ?BITX. I'll post the results.

Jack, W8TEE


From: John Kemker <kemkerj3@...>
To: [email protected]
Sent: Saturday, December 30, 2017 9:39 AM
Subject: Re: [BITX20] Tuner? Well Sure!

Just finished building a Kits And Parts (kitsandparts.com) SWR bridge.? Says it's good for up to 100W intermittently.? Probably would accept the 10W from the uBitx w/o a problem.? Designed to output to a pair of current meters, it could be hooked up to analog inputs on the Raduino to read forward and reflected power.
--

73 de W5NNH


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