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
By
Ashhar Farhan
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#44581
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Re: RD transistors, unobtanium?
An all band SDR using a faster processor? Hi Hi
M
By
Mike Woods
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#44580
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Re: adrino
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
By
Jerry Gaffke
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#44579
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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
By
w7hd.rh <w7hd.rh@...>
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#44578
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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
By
Ashhar Farhan
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#44577
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New file uploaded to [email protected]
Hello,
This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected] group.
*File:* uBITX_Programmers Reference.pdf
*Uploaded By:* Jim
By
[email protected] Notification <BITX20+notification@...>
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#44576
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New file uploaded to [email protected]
Hello,
This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected] group.
*File:* ubitx_I2C4L_V3_00R.zip
*Uploaded By:* Jim
By
[email protected] Notification <BITX20+notification@...>
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#44575
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Re: 13.8 v power supplies safe for bitx?
Found these on Amazon. Descent price. Good to have handy in the parts box.
https://www.amazon.com/dp/B01GJ0SC2C/ref=cm_sw_r_cp_awdb_t1_OzDQAb51VC4KQ
73
Don Meyerhoff
WA2SWX
[email protected]>
By
Don Meyerhoff <wa2swxdm@...>
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#44574
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New file uploaded to [email protected]
Hello,
This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected] group.
*File:* ubitx_I2C2L_V3_00R.zip
*Uploaded By:* Jim
By
[email protected] Notification <BITX20+notification@...>
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#44573
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Re: RD transistors, unobtanium?
Also ordered 6 while having a leisurely beer to pass the time between screens.
By
Bob Benedict, KD8CGH
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#44572
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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
By
K9HZ
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#44571
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Re: TDA2822 Audio problem
#ubitx
#tda2822
Maybe you can start with something like this https://www.alibaba.com/product-detail/TDA2822M-2w-x-1-Mono-Audio_60249198640.html
By
Joe Puma <kd2nfc@...>
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#44570
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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
By
Jerry Gaffke
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#44569
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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
By
N7FV
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#44568
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Re: RD transistors, unobtanium?
Just ordered ten RD15HFV1’s from RF Parts. Considering how SLOOOOOWWWW their site is there must be a run on the RD’s ;-) .
Mike
K5ESS
Sent: Wednesday, March 14, 2018 3:30 PM
To:
By
K5ESS
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#44567
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Re: Raduino oscilators. 33mhz and 57mhz. Documentation says one thinng, but this is what I measured.
Got it backward and could not go back and edit.? should be...
?The trick is if you take 45-33 your get 12?(the minus means inversion in frequency in this case) or its
?45-57 or -12 note the sign
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ajparent1/kb1gmx
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#44566
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Re: Raduino oscilators. 33mhz and 57mhz. Documentation says one thinng, but this is what I measured.
From what I read its not a bitx20 or 40, so the math shown appleis to a single conversioon receiver.
The microbitx ubitx is very different as its DUAL CONVERSION. So any math shown is just plain
wrong
By
ajparent1/kb1gmx
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#44565
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Re: RD transistors, unobtanium?
HI Farhan.
Does this mean V2 uBitx will have RD16HHF1 ??!?!
LOl, thanks,
73.
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Nick VK4PP
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#44564
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Re: Raduino oscilators. 33mhz and 57mhz. Documentation says one thinng, but this is what I measured.
Plenty of errors to be found in comments and documentation, including mine.
Better off obsessing with how it works than what the documentation says.
Been there for awhile.
I doubt it's "trivial".
And
By
Jerry Gaffke
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#44563
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Re: USB interface cable installation uBITX
There are two tiny metal "tabs" or fingers in the arduino-nano mini-USB socket that can get hooked into the plug when it is first inserted (has happened to two different Chinese made nanos in our
By
Al Duncan VE3RRD
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#44562
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