Re: Ubitx only on preorder now
I got a further message from Paypal to tell me that the kit had been dispatched, and giving me the India Post tracking Number ? 73 de Charlie GI4FUE ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Dan Reynolds
Sent: 12 December 2017 21:14
To: [email protected]
Subject: Re: [BITX20] Ubitx only on preorder now ? How do we know if we're on backorder or not? I didn't receive any confirmation of the order but I do see the order in PayPal..
Dan -- KB9JLO
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Re: Si570 Output (Sweeperino) - 100 MHs Sine?!
I have made several
signal generators with 2 different PCBs I designed.? Both
stand-alone with level shifting.
The big one uses the
SI part with 8 Clocks, I call it "Lotsa Clocks".? It has
optional I2C address bit.? And 8 Clocks.
I got all my SI parts
from Mouser.? Mine respond at 0x60 or 0x61 ?? I have seen them
run at the outputs with crystal not correctly connected.? I
have stopped using the Tiny crystals because of soldering
problems.
Check for 25 MHz small
sin wave on the crystal pins.? One pin has a larger sin wave
than the other.? I have made a sketch that runs one or the
other or both SI parts on 0x60 and 0x61.? I have bought dozens
of them, always have seen those 2 addresses?
73's
Mike, WA6ISP
On 12/12/2017 12:48 PM, AndyH wrote:
Hey folks,
? ?The executive summary is that I've assembled an Si570 generator
for a Sweeperino (prereq for my scratch built ?BITX) and it's
emitting a 400 mV p-p sine at 100 MHz.? I cannot adjust the
frequency.? I have no idea what's happening.
? ?Details...? I verified details of the Mouser-sourced Si570 from
the Sil Labs database.? The address is verified (0x55) and I can
talk to the Si570 with an I2C scanner and Farhan's code (as well
as the Razzie code).? Voltages are good, the layout was inspired
by Farhan's build as well as the builds documented by Tony
Fishpool and published in Razzie (June, 2016).? Adjusting the
tuning pot makes the numbers change on the LCD. There's a light
square wave on the Rigol display when the frequency is actually
changing.? I can't collect this signal by probing the Arduino or
the comms or power pins - its only present on the output of the
Si570.
? ?Does this mean anything to the Si570 experts?
? ? Thanks,
? ? ?Andy, KG5RKP
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID "MotDog@..."
Mike@...
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Re: Ubitx only on preorder now
Look at the date/time the post/note was sent.
Did you order before that date and time?
If yes then you are in the que.
If no then you are on B/O.
My Bitx 40 has been a fun project and a great little rig to operate.
I'm sure the uBitx will be the same.
Bob?
N1ETS
?
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Re: Ubitx only on preorder now
That makes a bunch of us.
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Re: Ubitx only on preorder now
Same question here.? Greg, KC8HXO
On Tuesday, December 12, 2017, Dan Reynolds < on30ng@...> wrote: How do we know if we're on backorder or not? I didn't receive any confirmation of the order but I do see the order in PayPal..
Dan -- KB9JLO
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How to search for earlier posts regarding specific BITX questions.
Many of the newer members to this group are posting questions that have already been
asked and answered.? If you want to do further research into a specific topic it might be
interesting to log into the discussion group and do a search for items of interest. ? No problem with asking in new emails but for in-depth information you can search the archive
and see all the answers instead of just the latest one.? This is one of the advantages of
having a common archive for all BITX related discussions, diagrams, modifications, and
ideas.
Arv
_._
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Re: Small question about LCD mounting
David :
The switch controls ?a SotaBeams DSP audio filter module. I have the General Purpose one installed
which has a 2.4 Khz SSB filter (WIDE) and a 300 Hz CW filter (Narrow). The switch is actually
a three pole switch so the top position bypasses the filter. These little modules work amazingly
well and only draw about 30ma of current. I have another one on order for my uBITX.
Here is a link for more info :
https://www.sotabeams.co.uk/dual-bandwidth-filter-modules-ssb-cw/
Cheers
Michael VE3WMB?
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Re: Ubitx only on preorder now
How do we know if we're on backorder or not? I didn't receive any confirmation of the order but I do see the order in PayPal..
Dan -- KB9JLO
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Re: Seperate group for uBITX ?
I agree, I just joined this email list due to the uBITX
Jeff KE8BLW
On Tue, Dec 12, 2017 at 3:57 PM, Alan Jones <oalanjones@...> wrote:
I agree that a separate group is appropriate. Al, N8WQ
IMHO a subgroup would be the appropriate option.?
Just my 2 cents.
-- Using Opera's mail client:
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Re: #uBITX Front end overload protection
#ubitx
Not there.
Good to add two back-to-back 1n4148's from relay K1 pin 12 to ground to limit the AC voltage at the base of Q90
if the uBitx should ever be plugged into an antenna while some 100W transmitter is using a nearby antenna.
Or a nearby lightning bolt.
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On Tue, Dec 12, 2017 at 11:24 am, M Garza wrote:
Looking at the schematic, it doesn't look like the diode front end receive protection was added to the uBITX.??
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Re: Seperate group for uBITX ?
I agree that a separate group is appropriate. Al, N8WQ
On Tue, 12 Dec 2017 11:20:59 -0500, <nphektor@...> wrote:
IMHO a subgroup would be the appropriate option.?
Just my 2 cents.
-- Using Opera's mail client:
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Si570 Output (Sweeperino) - 100 MHs Sine?!
Hey folks,
? ?The executive summary is that I've assembled an Si570 generator for a Sweeperino (prereq for my scratch built ?BITX) and it's emitting a 400 mV p-p sine at 100 MHz.? I cannot adjust the frequency.? I have no idea what's happening.
? ?Details...? I verified details of the Mouser-sourced Si570 from the Sil Labs database.? The address is verified (0x55) and I can talk to the Si570 with an I2C scanner and Farhan's code (as well as the Razzie code).? Voltages are good, the layout was inspired by Farhan's build as well as the builds documented by Tony Fishpool and published in Razzie (June, 2016).? Adjusting the tuning pot makes the numbers change on the LCD. There's a light square wave on the Rigol display when the frequency is actually changing.? I can't collect this signal by probing the Arduino or the comms or power pins - its only present on the output of the Si570.
? ?Does this mean anything to the Si570 experts?
? ? Thanks,
? ? ?Andy, KG5RKP
|
Thanks Sarma
Good suggestion on the fet buffer. I will give the pre-mixer buffer a try and if that does not work out I will make up an extra buffer stage ahead of the counter.
Regards
Paul ZS2OE
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Re: ubitx raduino schematic
http://www.hfsignals.com/wp-content/uploads/2017/12/raduino.pdf
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Re: Reverse polarity diode circuit
I made this for the FT817/ND power protections....7 in 1.
https://www.ebay.com/itm/132393671077?ul_noapp=true
--
AncelB, MIT EE6002
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Hi All,
Anyone know where I can find a ubitx raduino schematic??
Thanks,
Rod KM6SN
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Re: Reverse polarity diode circuit
OK, that one is drawn correctly. The circuit is confusing enough that some of the PFET reverse protection circuits you find out there on the interwebs are simply wrong: ? ? ? /g/BITX20/message/35434Jerry
On Tue, Dec 12, 2017 at 11:54 am, Vladimir Rytikov wrote:
this seems like a better way of doing diode protections:
?
?
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Re: Reverse polarity diode circuit
The MOSFET FQP47§©06 is an interesting solution but can it be combined with
a current limiting function.? This might save IRF510s from being fried if antenna
impedance is not proper.? It might also minimize need for low amperage fuses.
Arv
_._
On Tue, Dec 12, 2017 at 12:55 PM, Dexter N Muir <dexy@...> wrote: Series diode, 3A or 5A are fairly common in junkboxes. 0.6V drop, less if Scottky. Best and simplest. Easiest for 'newbies' too! More advanced: Across that diode a red LED and resistor (I'd suggest 5k) to light up when nothing (else) happens given wrong polarity. Saves on head-scratching! :)
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Re: Reverse polarity diode circuit
Series diode, 3A or 5A are fairly common in junkboxes. 0.6V drop, less if Scottky. Best and simplest. Easiest for 'newbies' too! More advanced: Across that diode a red LED and resistor (I'd suggest 5k) to light up when nothing (else) happens given wrong polarity. Saves on head-scratching! :)
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Re: Reverse polarity diode circuit
this seems like a better way of doing diode protections:
the transistor is?¹ó²Ï±Ê47§©06.
for the first moment the current will flow through the diode and have a voltage drop of about 1 V which is not good for power dissipation as we discovered already. however once it is on the transistor will open and the current will flow through it and giving mV of voltage drop and minimal dissipation power in order of mW.
Here is the original article where I found it:
it is not in English - however you can see the schematic and maybe you some google translate.
the last circuit shows how it is done in modern electronic and listing the part number which does the trick in in one single device.
-- vladimir
On Tue, Dec 12, 2017 at 11:43 AM, Steve Black via Groups.Io <kb1chu@...> wrote:
Murphy is a frequent visitor to field day events.
Steve kb1chu
I thought that was an infallible method as well. All of my "wall
warts" and cigarette lighter cables that had the coaxial plugs,
all had the shell negative and the pin positive. Every one I ever
came across was this way. One day at field day someone handed me
one made by HP. The plug was reversed and the smoke escaped. I
have no idea why HP did this but they did. I forgot to read the
fine print on the device.
Joe WK0G
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Charlie Morrison
q q
Jim Sheldon
Dan Reynolds
Ancel