Re: USB interface cable installation uBITX
I got mine from Ebay
--
David
?N8DAH
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Re: RD transistors, unobtanium?
Must have restocked!
At 15/03/2018, you wrote:
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I am confused.?? Looking at
this page:? ?
RF Parts still lists this as available.
Marco - Kg5PRT
On Wed, Mar 14, 2018 at 2:45 PM, Ashhar Farhan
<farhanbox@...>
wrote:
- Does anyone have news of this? RF Parts is no longer stocking
RD16HHF1 and they have marked RD15HVF1 as EOL. where does that leave us
all?
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Re: RD transistors, unobtanium?
The IRF530 seems to be a very good drop-in replacement for the IRF510.
It has higher power capability with similar specs otherwise. Vdss=100V Id=17A Rds(on)=90mohm.
Mouser carries them in stock (5,551 in stock) 942-IRF530NPBF by Infineon.
(10,36 in stock at $1.07) 844-IRF530PBF by Vishay.
Made by Vishay Siliconix, Infineon,ON Semiconductor, STMicroelectronics.
Available in TO-220-3 and TO-252-3 packages for about $0.90 each.
Another alternative is the MTP3055E for less than $1.00 from Digipart.com.? It's good for up to 30W at 10M.
Ron W7HD
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Re: New for pi-day, the Rasberry Pi 3 B+
Everybody be knowin’ Pie are round, cornbread are square. ? v/r Fred W4JLE ? ?
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From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Rob Snow
Sent: Thursday, March 15, 2018 00:01
To: BITX20@groups.io
Subject: Re: [BITX20] New for pi-day, the Rasberry Pi 3 B+ ? Just remember, kids:
Pie are not round.
Pi r squared.
I'll show myself out and happy Pi day.
73
Rob
AG5OV
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Re: New for pi-day, the Rasberry Pi 3 B+
Just remember, kids:
Pie are not round.
Pi r squared.
I'll show myself out and happy Pi day.
73
Rob
AG5OV
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Re: RD transistors, unobtanium?
Yes - challenges sourcing Generic parts seems to be emerging.
I like the VHF multiband idea - and this may tie in with your Narrowband FM mod suggestion ... on the Raduino output!? But somewhere along the way you mentioned experiments with an SDR design as well ...
Mike
On Thu, 15 Mar 2018 at 4:20 PM, Ashhar Farhan < farhanbox@...> wrote: More like a multiband vhf... but it is not about any particular project. Radio community has inertia with favourite devices. While subsitutes are possible at low power levels, the devices are fewer for our purpose on HF at 12v. It looka like generics like the IRF510 (which too is No longer manufactured by IRF) are givong away to devices with lower voltages, microwave responses and they are manufacturer specific. - f
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Re: RD transistors, unobtanium?
More like a multiband vhf... but it is not about any particular project. Radio community has inertia with favourite devices. While subsitutes are possible at low power levels, the devices are fewer for our purpose on HF at 12v. It looka like generics like the IRF510 (which too is No longer manufactured by IRF) are givong away to devices with lower voltages, microwave responses and they are manufacturer specific. - f
On 15 Mar 2018 8:34 am, "Mike Woods" < mhwoods@...> wrote: An all band SDR using a faster processor? Hi Hi
M On Thu, 15 Mar 2018 at 3:31 PM, Ashhar Farhan < farhanbox@...> wrote: I am trying to find transistors for our future work. The TDA2822 episode has had me hurting. It is time we identified some long term candidates for RF power.? - f
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Re: RD transistors, unobtanium?
An all band SDR using a faster processor? Hi Hi
M
On Thu, 15 Mar 2018 at 3:31 PM, Ashhar Farhan < farhanbox@...> wrote: I am trying to find transistors for our future work. The TDA2822 episode has had me hurting. It is time we identified some long term candidates for RF power.? - f
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A bunch of $3 Nano clones is a good choice.
can hook them up to a few resistors plus some LED's and speakers and maybe a display,
will make a great introduction to programming.
If starting from scratch and no idea what you want to do with it,
one of the kits is not a bad bet:
? ??
If you mostly want to learn programming and are not interested in hardware,
install linux on some old windows machine.? Ubuntu linux is not a bad choice.
Comes with lots of programming tools installed, including support for C and Python
among several dozen other popular languages.
Jerry, KE7ER
?On Wed, Mar 14, 2018 at 03:44 pm, @bobbybailey wrote:
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I am wanting to learn programing, looking at a starter kit r3, is this compatible with the one in the mbitx ?
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Re: 13.8 v power supplies safe for bitx?
I just went through that due to a failing hard drive.? It was
starting to drop sectors, but showed the problem as lockups when
accessing various subsystems, such as serial ports.? Replaced the
spinning hard drive with an SSD drive, reinstalled the Linux OS
and all is well again.
Ron W7HD
On 03/14/2018 07:21 PM, Don Meyerhoff
wrote:
Found these on Amazon. Descent price. Good to have
handy in the parts box.
--
Ron W7HD - NAQCC#7587 OMISS#9898 KX3#6966 LinuxUser#415320
Editor OVARC newsletter
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Re: RD transistors, unobtanium?
I am trying to find transistors for our future work. The TDA2822 episode has had me hurting. It is time we identified some long term candidates for RF power.? - f
On 15 Mar 2018 7:46 am, "KD8CGH" < rkayakr@...> wrote: Also ordered 6 while having a leisurely beer to pass the time between screens.
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New file uploaded to BITX20@groups.io
BITX20@groups.io Notification
Hello,
This email message is a notification to let you know that a file has been uploaded to the Files area of the BITX20@groups.io
group.
File: uBITX_Programmers Reference.pdf
Uploaded By:
Jim Sheldon
Description:
This is the programmers reference guide written by Jim Sheldon, W0EB and Ron Pfeiffer, W2CTX. It lists the uBITX cat commands so anyone wishing to write interface firmware for the uBITX will have our PC command list, how each command is formatted and how it affects the uBITX. This manual IS copyrighted by W0EB and W2CTX but may be freely distributed as long as nothing is changed and full credit is given to the authors.
You can access this file at the URL:
/g/BITX20/files/uBITX_Programmers%20Reference.pdf
Cheers,
The Groups.io Team
|
New file uploaded to BITX20@groups.io
BITX20@groups.io Notification
Hello,
This email message is a notification to let you know that a file has been uploaded to the Files area of the BITX20@groups.io
group.
File: ubitx_I2C4L_V3_00R.zip
Uploaded By:
Jim Sheldon
Description:
W0EB/W2CTX latest firmware release for I2C equipped uBITX transceivers. This version works on ANY I2C enabled Raduino card with an I2C 4 line x 20 character display if you follow the instructions and works especially well on our "RadI2Cino" card (available from W0EB - email via the email listed on QRZ please, not on the group forum for details on the RadI2Cino) This is the FOUR line display version with fully implemented CAT and interrupt driven CW - swappable paddles, Iambic A and B keyer modes. Completely rewritten alignment mode that has proven to be quite accurate as well.
You can access this file at the URL:
/g/BITX20/files/ubitx_I2C4L_V3_00R.zip
Cheers,
The Groups.io Team
|
Re: 13.8 v power supplies safe for bitx?
Found these on Amazon. Descent price. Good to have handy in the parts box.
On Mar 14, 2018 4:28 PM, "Jerry Gaffke via Groups.Io" <jgaffke= yahoo.com@groups.io> wrote: Had never heard of Drok, they have lots of stuff up on Amazon.
Does your Drok allow you to set the max current anywhere from 0 Amps to say 5 Amps?
Sorely needed.
Lots of cheap switchers out there now, but none of them seem to deal properly with current limiting.
Should be able to set both the regulated voltage and the max current.
If the load sucks too much current, the voltage drops until the current comes within the set limit.
Any of those switchers could do this for the price of an op-amp and a pot, maybe an extra $1.
Jerry, KE7ER
?
On Wed, Mar 14, 2018 at 12:47 pm, Walter wrote:
A little more expensive model put out by droke even has a current limiting feature.
|
New file uploaded to BITX20@groups.io
BITX20@groups.io Notification
Hello,
This email message is a notification to let you know that a file has been uploaded to the Files area of the BITX20@groups.io
group.
File: ubitx_I2C2L_V3_00R.zip
Uploaded By:
Jim Sheldon
Description:
W0EB/W2CTX latest firmware release for I2C equipped uBITX transceivers. This version works on ANY I2C enabled Raduino card with an I2C 2 line x 16 character display if you follow the instructions and works especially well on our "RadI2Cino" card (available from W0EB - email via the email listed on QRZ please, not on the group forum for details on the RadI2Cino) This is the TWO line display version with fully implemented CAT and interrupt driven CW - swappable paddle selection, Iambic A and B keyer modes. Completely rewritten alignment mode that has proven to be quite accurate as well.
You can access this file at the URL:
/g/BITX20/files/ubitx_I2C2L_V3_00R.zip
Cheers,
The Groups.io Team
|
Re: RD transistors, unobtanium?
Also ordered 6 while having a leisurely beer to pass the time between screens.
|
Re: RD transistors, unobtanium?
Mouser had them recently too...
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:
email:??bill@... ?
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On Mar 14, 2018, at 3:28 PM, Ryan Flowers < geocrasher@...> wrote: I got some RD15HVF1's a while back at?
but the RD16HHF1's are rare as hens teeth:
--
Ryan Flowers - W7RLF
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Maybe you can start with something like this?
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I didn't notice it too much myself until someone pointed it out.? Now it drives me crazy.? Was thinking if I am going to build an audio filter I might as well socket the MX TDA2822 and mount the IC to board with a voltage regulator and a bandpass filter. May try to make it a plug in module that fits into the DIP socket.
--
Jason Schlager
KM6AUS
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Re: Raduino oscilators. 33mhz and 57mhz. Documentation says one thinng, but this is what I measured.
So, exactly what math is this that was shown? Perhaps post 44560? Michael is only describing the conversion from 1'st IF to 2'ed IF, he's quite aware the uBitx is double conversion. Take a look at the math in this post of our current thread: ? ? ?? /g/BITX20/message/44515See anything wrong there? I really am looking for somebody to vet it. Especially the improved code in post 44278 Jerry, KE7ER
On Wed, Mar 14, 2018 at 06:20 pm, ajparent1 wrote:
From what I read its not a bitx20 or 40, so the math shown appleis to a single conversioon receiver.
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Received ubitx order Jan 18th
DHL package showed up. Didn't open it up to inspect tda chip. Will post when I find out.
Cory
N7FV
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N8DAH
Raj vu2zap
Bob Benedict, KD8CGH
K9HZ