Date   
Re: RD16HHF1 in the uBITX #ubitx

Jerry Gaffke
 

Curious.
Farhan recommends 100ma of bias through each uBitx FET, same as the Bitx40:
    http://www.hfsignals.com/index.php/ubitx-tuneup/
WA2EBY recommends 10ma in part2 of his writeup.

It does make sense on the Bitx40 to have a heavy quiescent current, since it is not push-pull.

You definitely want to zero the bias pots (RV2 and RV3 both clockwise on the uBitx)
before powering it up with new FET's, and then carefully adjust for the desired quiescent drain current.
Even if the new FET's are from the same lot as what was replaced, as the Vgs threshold 
can vary significantly from part to part.

Jerry, KE7ER




HFSingnals  bias current through each FET of 100ma can remain as it was on the uBitx.


On Mon, Feb 5, 2018 at 12:03 am, K9HZ wrote:
Nope. Close enough. 

  

On Feb 4, 2018, at 10:39 PM, Nick VK4PLN <nickpullen@...> wrote:

Excellent, thats what I am hoping to get to.
So the bias will need re-adjusting... Easy....?
What about the input and output transformers? I assume this will need modification due to the differnet impedances of the IRF and RD...

Thanks everyone for your input so far.
73.NIck VK4PLN

Re: uBITX AGC - Adafruit TPA2016, A Success! #ubitx

Michael Monteith
 

Which 2 boards?  I know the one is the TAP2016.  What's the other?

73, Michael
KM4OLT

On Fri, Feb 2, 2018 at 06:13 pm, Nick VK4PLN wrote:
Hi john, both boards from eBay...
I am really happy with the setup, AGC is performing very well in my opinion...

Re: uBITX drive level.. #ubitx

Anders Landgren
 

Mr Kang has published his fix for low drive on his excellent blog:
http://smallwonderqrp.blogspot.se/2017/11/?m=1
73 de SM5NNO

My UbitX and modify CW keying on Mic PTT #ubitx

Mitani Masaru
 

Hi,This is JE4SMQ masa.

My ubitx contains in ORIGAMI paper case(15 cm square).
It's costs only 100JPY(about $1).
Exchange no push switch Encoder and Indipendent push switch add.

Ver1.00R Software install and modify:

1. Transmit can Japan Amateur bands only.
If offband Frequency,no PTT/CW breakin work.
Thins function requre Japan low.
2.BAND Select mode,Frequency fits Japan BAND PLAN.
3.In CW mode.
Mic PTT can keying, This is Always,Straghit key mode.
If Paddle connect,keyer can use(in menu setting).

Thank you.

Re: Case

Arv Evans
 

Great looking chassis.  It shows what can be done with a small number of tools and
a lot of ingenuity. 

Arv  K7HKL
_._


On Mon, Feb 5, 2018 at 1:06 AM, Sajeesh Pilakkat via Groups.Io <sajeeshpilakkat@...> wrote:
Dear All,

Inviting you all to have a look on uBitx Case Home brewed.

http://vu3psz.blogspot.in/2018/02/ubitx-home-brewed-enclosure.html


Re: Second batch of uBITX shipping? #ubitx

Art Howard
 


On 5 Feb 2018 6:43 am, "dj0hf" <dj0hf@...> wrote:
You couldn't make it up - My ubitx took just 24 hours to get from India to Germany with DHL and has now sat for 3 days (so far) at the customs in Leipzig and they are refusing to release it without a detailed description of exactly what is inside the package.
I've sent them a description and a link to the hfsignals web-site. So now it's just wait and see what happens. Maybe I'll get it eventually

Ian
DJ0HF/G3ULO



Re: whistles in receive

Ashhar Farhan
 

The warm smells of an HRO steaming up... is there any hotroding one can do to these rigs?
- f

On 5 Feb 2018 12:02 am, "Leland Lannoye" <wa9aoe@...> wrote:
I am sitting here reading some of this information and studying the new technology.  When I was young (at leas 50 years ago), solid state technologies were either in their infancy or still a dream.  Our rigs were two pieces of equipment, a receiver and a transmitter with a variety of accessories.

Most of our receivers for those of us who were not well heeld in the financial area were of the single conversion genre with an if frequency of 455 kHz.  With little preselection capability, this relegated the ham bands 20 mtrs and above useless with hetrodyne images from frequencies 910 kHz either above or below the desired reception point. There, in that day, were three remedies to fix this. The first two were:

    1.)  add a really selective high gain preselector to tune the offending images out

    2.)  raise the if to something on the order of 1600 kHz which left bandpass selectivity at a substantial disadvantage.

The third option, and the most expensive in its day was double (or, even triple) conversion.  If  you were able to pay the 1958 price of over $300, you were in and there were few difficulties thereafter until the receiver aged and developed some bad shield grounds or worse.  The second or third conversion local oscillator would provide a cornu copia of birdies of one type or another. These included signals that were always there, I know the newer designs with balanced mixers and the like have few of these problems, but, it is worth considering.

An aging ham from way back.


Lee, WA9AOE


---
This email has been checked for viruses by AVG.
http://www.avg.com




Re: My UbitX and modify CW keying on Mic PTT #ubitx

Thomas Sharka
 

if (frequency >= 28000000 && frequency <= 28000000) hambandfrequyency = true

You can only transmit on 28 Mhz?
 


Sent from Yahoo Mail. Get the app


On Monday, February 5, 2018 10:28 AM, Mitani Masaru <mitani.masaru@...> wrote:


Hi,This is JE4SMQ masa.

My ubitx contains in ORIGAMI paper case(15 cm square).
It's costs  only 100JPY(about $1).
Exchange no push switch Encoder and Indipendent push switch add.

Ver1.00R Software install and modify:

1. Transmit can Japan Amateur bands only.
If offband Frequency,no PTT/CW breakin work.
Thins function requre Japan low.
2.BAND Select mode,Frequency fits Japan BAND PLAN.
3.In CW mode.
Mic PTT can keying, This is Always,Straghit key mode.
If Paddle connect,keyer can use(in menu setting).

Thank you.




Re: My UbitX and modify CW keying on Mic PTT #ubitx

Mitani Masaru
 

It's already fixed.
Thank you.

Re: whistles in receive

Leland Lannoye
 

There have been numerous articles in QST over the years on rebuilding these old rigs.  I found an article which I saved somewhere on building transistor substitutes for the tubes.  you could build them on small perf boards and set up a set of wires that corresponded to the pin out on the tubes.  At one time, someone was making modules to replace all the low power and receiving tubes on the Collins S line.  That was at least 40 years ago.  I don't do well on a lot of these tiny connections anymore due to age and aging eyes, but my history skills are still largely intact.

Lee, WA9AOE

PS: Still awaiting shipment on my Bitx.

On 2/5/2018 10:40 AM, Ashhar Farhan wrote:
The warm smells of an HRO steaming up... is there any hotroding one can do to these rigs?
- f

On 5 Feb 2018 12:02 am, "Leland Lannoye" <wa9aoe@...> wrote:
I am sitting here reading some of this information and studying the new technology.  When I was young (at leas 50 years ago), solid state technologies were either in their infancy or still a dream.  Our rigs were two pieces of equipment, a receiver and a transmitter with a variety of accessories.

Most of our receivers for those of us who were not well heeld in the financial area were of the single conversion genre with an if frequency of 455 kHz.  With little preselection capability, this relegated the ham bands 20 mtrs and above useless with hetrodyne images from frequencies 910 kHz either above or below the desired reception point. There, in that day, were three remedies to fix this. The first two were:

    1.)  add a really selective high gain preselector to tune the offending images out

    2.)  raise the if to something on the order of 1600 kHz which left bandpass selectivity at a substantial disadvantage.

The third option, and the most expensive in its day was double (or, even triple) conversion.  If  you were able to pay the 1958 price of over $300, you were in and there were few difficulties thereafter until the receiver aged and developed some bad shield grounds or worse.  The second or third conversion local oscillator would provide a cornu copia of birdies of one type or another. These included signals that were always there, I know the newer designs with balanced mixers and the like have few of these problems, but, it is worth considering.

An aging ham from way back.


Lee, WA9AOE


---
This email has been checked for viruses by AVG.
http://www.avg.com





Virus-free. www.avg.com

Re: Anyone (US Only for now) need a uBITX Raduino repaired? #ubitx

Christopher Miller
 

Sweet, now i just need a ubitx

Re: Second batch of uBITX shipping? #ubitx

Leland Lannoye
 

Klinkt mir, dass der Herr Walter Ulbricht beherrscht die deutsche Kontrolle jetzt! . Jawohl, Komrad!

On 2/5/2018 10:39 AM, Art Howard wrote:

On 5 Feb 2018 6:43 am, "dj0hf" <dj0hf@...> wrote:
You couldn't make it up - My ubitx took just 24 hours to get from India to Germany with DHL and has now sat for 3 days (so far) at the customs in Leipzig and they are refusing to release it without a detailed description of exactly what is inside the package.
I've sent them a description and a link to the hfsignals web-site. So now it's just wait and see what happens. Maybe I'll get it eventually

Ian
DJ0HF/G3ULO




Virus-free. www.avg.com

Re: whistles in receive

Jerry Gaffke
 

One of my earliest memories at about 3 years of age, maybe less, is being fascinated
by the console tube radio we had in the living room.
Peering around in back, face pressed against the wall, trying to see what was inside
and figure out how it worked. 
My elders teasing me, telling me about all the little people tucked inside. 

Younger hams in the states will only think of Ham Radio Outlet, our local retail chain.
Here's the real HRO:  http://www.radioblvd.com/National%20HRO.htm
And a choice quote:

The original published story for the origin of  the HRO designation related that all of National's inter-departmental paperwork for the receiver project was stamped "H.R.O." which stood for "Hellva Rush Order" since the time table for the receiver development was a "rush order" type of project. For many years this was the story related in National advertising and it sounded believable. However, after James Millen left National in 1939, he corrected the story as follows:

The original development paperwork was usually marked "H.O.R." - for "Hell Of a Rush" but during the finalization phase, someone at National decided they didn't want their new receivers to be referred to as "HORs" so the letters were rearranged and became HRO - then the "Hellva Rush Order" story created to explain the HRO designation.

Well,...that's Millen's story anyway.   


On Mon, Feb 5, 2018 at 07:40 am, Ashhar Farhan wrote:
The warm smells of an HRO steaming up... is there any hotroding one can do to these rigs?
- f
 

At long last!!

David Robertson
 

I finally got my paypal e-mail indicating my uBITX radio is shipping. As for many others it has been a long wait. Looking forward for the DSL package at my door

73
Dave KD1NA 

Re: At long last!!

Vince Vielhaber
 

DSL? Coming via internet connection? :)

Do you recall your order date?

Vince.

On 02/05/2018 11:39 AM, David Robertson wrote:
I finally got my paypal e-mail indicating my uBITX radio is shipping. As
for many others it has been a long wait. Looking forward for the DSL
package at my door

73
Dave KD1NA

Re: At long last!!

bill richardson
 

Great news Dave.. got mine last week and it’s built in a case and firmware updated..

Good seeing you at BBQCon a few weeks ago.

73 Bill Ng1p

On Feb 5, 2018, at 11:39 AM, David Robertson <kd1na363@...> wrote:

KD1NA

Re: At long last!!

Leland Lannoye
 

Mine was December 20, 2017.

On 2/5/2018 11:46 AM, Vince Vielhaber wrote:
DSL? Coming via internet connection?  :)

Do you recall your order date?

Vince.



On 02/05/2018 11:39 AM, David Robertson wrote:
I finally got my paypal e-mail indicating my uBITX radio is shipping. As
for many others it has been a long wait. Looking forward for the DSL
package at my door

73
Dave KD1NA
---
This email has been checked for viruses by AVG.
http://www.avg.com

Re: Second batch of uBITX shipping? #ubitx

KK6VLV
 

Just got email about 6 hours ago with the tracking number.
I ordered on December 17. I am in USA.
Estimated delivery date from DHL website using the tracking number is Friday February 9.
--
KK6VLV

Re: whistles in receive

Jack Purdum
 

One can get carried away, however...

Inline image
Jack, W8TEE


From: Leland Lannoye <wa9aoe@...>
To: BITX20@groups.io
Sent: Monday, February 5, 2018 10:49 AM
Subject: Re: [BITX20] whistles in receive

There have been numerous articles in QST over the years on rebuilding these old rigs.  I found an article which I saved somewhere on building transistor substitutes for the tubes.  you could build them on small perf boards and set up a set of wires that corresponded to the pin out on the tubes.  At one time, someone was making modules to replace all the low power and receiving tubes on the Collins S line.  That was at least 40 years ago.  I don't do well on a lot of these tiny connections anymore due to age and aging eyes, but my history skills are still largely intact.
Lee, WA9AOE
PS: Still awaiting shipment on my Bitx.
On 2/5/2018 10:40 AM, Ashhar Farhan wrote:
The warm smells of an HRO steaming up... is there any hotroding one can do to these rigs?
- f

On 5 Feb 2018 12:02 am, "Leland Lannoye" <wa9aoe@...> wrote:
I am sitting here reading some of this information and studying the new technology.  When I was young (at leas 50 years ago), solid state technologies were either in their infancy or still a dream.  Our rigs were two pieces of equipment, a receiver and a transmitter with a variety of accessories.

Most of our receivers for those of us who were not well heeld in the financial area were of the single conversion genre with an if frequency of 455 kHz.  With little preselection capability, this relegated the ham bands 20 mtrs and above useless with hetrodyne images from frequencies 910 kHz either above or below the desired reception point. There, in that day, were three remedies to fix this. The first two were:

    1.)  add a really selective high gain preselector to tune the offending images out

    2.)  raise the if to something on the order of 1600 kHz which left bandpass selectivity at a substantial disadvantage.

The third option, and the most expensive in its day was double (or, even triple) conversion.  If  you were able to pay the 1958 price of over $300, you were in and there were few difficulties thereafter until the receiver aged and developed some bad shield grounds or worse.  The second or third conversion local oscillator would provide a cornu copia of birdies of one type or another. These included signals that were always there, I know the newer designs with balanced mixers and the like have few of these problems, but, it is worth considering.

An aging ham from way back.


Lee, WA9AOE


---
This email has been checked for viruses by AVG.
http://www.avg.com





Virus-free. www.avg.com


Re: whistles in receive

chris gress <Chrisg0wfh@...>
 

And to think I have 1 old ICOM I'm to poor for any else lol

On 5 Feb 2018 18:35, "Jack Purdum via Groups.Io" <jjpurdum=yahoo.com@groups.io> wrote:
One can get carried away, however...

Inline image
Jack, W8TEE


From: Leland Lannoye <wa9aoe@...>
To: BITX20@groups.io
Sent: Monday, February 5, 2018 10:49 AM
Subject: Re: [BITX20] whistles in receive

There have been numerous articles in QST over the years on rebuilding these old rigs.  I found an article which I saved somewhere on building transistor substitutes for the tubes.  you could build them on small perf boards and set up a set of wires that corresponded to the pin out on the tubes.  At one time, someone was making modules to replace all the low power and receiving tubes on the Collins S line.  That was at least 40 years ago.  I don't do well on a lot of these tiny connections anymore due to age and aging eyes, but my history skills are still largely intact.
Lee, WA9AOE
PS: Still awaiting shipment on my Bitx.
On 2/5/2018 10:40 AM, Ashhar Farhan wrote:
The warm smells of an HRO steaming up... is there any hotroding one can do to these rigs?
- f

On 5 Feb 2018 12:02 am, "Leland Lannoye" <wa9aoe@...> wrote:
I am sitting here reading some of this information and studying the new technology.  When I was young (at leas 50 years ago), solid state technologies were either in their infancy or still a dream.  Our rigs were two pieces of equipment, a receiver and a transmitter with a variety of accessories.

Most of our receivers for those of us who were not well heeld in the financial area were of the single conversion genre with an if frequency of 455 kHz.  With little preselection capability, this relegated the ham bands 20 mtrs and above useless with hetrodyne images from frequencies 910 kHz either above or below the desired reception point. There, in that day, were three remedies to fix this. The first two were:

    1.)  add a really selective high gain preselector to tune the offending images out

    2.)  raise the if to something on the order of 1600 kHz which left bandpass selectivity at a substantial disadvantage.

The third option, and the most expensive in its day was double (or, even triple) conversion.  If  you were able to pay the 1958 price of over $300, you were in and there were few difficulties thereafter until the receiver aged and developed some bad shield grounds or worse.  The second or third conversion local oscillator would provide a cornu copia of birdies of one type or another. These included signals that were always there, I know the newer designs with balanced mixers and the like have few of these problems, but, it is worth considering.

An aging ham from way back.


Lee, WA9AOE


---
This email has been checked for viruses by AVG.
http://www.avg.com





Virus-free. www.avg.com