Re: For those keeping track of uBITX shipping times
#ubitx
Forgot to mention, it's serial # 133/5? so they must be in the 5th batch now.? It does have a socketed UTC audio chip.
W0EB
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Re: For those keeping track of uBITX shipping times
#ubitx
12:31 Central US Daylight time, DHL courier handed me the package!? It don't get much better than that!
Jim - W0EB
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The ubitx wants to see a low-impedance drive from the mic, comparable to a 600 ohm impedance or thereabouts.? The D-104 crystal element presents a 50K ohm impedance, and the amplified D-104 presents an unmatched impedance that's not really compatible with any 600 ohm that a low-impedance audio input wants to see, except that the amp typically overdrives to the point that something works.
A 50K - 600 ohm audio transformer between the D-104 and the ubitx would probably straighten nearly everything out.? A 1000 - 8 ohm audio transformer stripped out of an old pocket transistor radio or CB would probably be close enough. This is one of those things where it's probably easier to experiment a little than to work out the mathematics.? Oh yeah -- if the D-104 has its original crystal element, is it still good?? And since most BITX models can be wired for an electret mic, have you put a DC blocking cap in the mic audio like to the D-104?? Eihter of those will cause a D-104 not to work as intended. 73 Jim N6OTQ
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Re: New uBITX Raduino (never used) For Sale
#ubitx
The Raduino has been spoken for. ?There may be another one available (same deal) early next week and I'll post that if it happens.
Jim - W0EB
------ Original Message ------
Sent: 4/27/2018 11:17:50 AM
Subject: [BITX20] New uBITX Raduino (never used) For Sale #ubitx
I have a never used Raduino from a Micro BITX (not a BITX40) complete with display just as it came in the box from India.? $30 US plus shipping ($8.00 US, $15.00 International).
Please "reply to sender", NOT to the list if interested and the first off list replay saying "I'll take it" by date time on the email will get first crack at it USD $38 shipped in the U.S., $45 shipped international.
Don't paypal any money until after you contact me off the list and I tell you "It's Yours".? Right now, I only have one but should have a 2nd one by the first of the week that may be up for sale as well.
Thanks,
Jim Sheldon - W0EB? w0eb (at) cox dot net
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New uBITX Raduino (never used) For Sale
#ubitx
I have a never used Raduino from a Micro BITX (not a BITX40) complete with display just as it came in the box from India.? $30 US plus shipping ($8.00 US, $15.00 International).
Please "reply to sender", NOT to the list if interested and the first off list replay saying "I'll take it" by date time on the email will get first crack at it USD $38 shipped in the U.S., $45 shipped international.
Don't paypal any money until after you contact me off the list and I tell you "It's Yours".? Right now, I only have one but should have a 2nd one by the first of the week that may be up for sale as well.
Thanks,
Jim Sheldon - W0EB? w0eb (at) cox dot net
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Re: For those keeping track of uBITX shipping times
#ubitx
My ubix is still MIA? ordered 26/03 no trace of it been shipped still waiting for it to be sorted out :(
On Fri, 27 Apr 2018, 15:39 , < john@...> wrote: Yes indeed. Mine must have been in there right along with yours. It made it to Romulus Michigan this morning and is now out for delivery.?
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Re: ND6T AGC implementation for uBIT-X
I can do anything with the shear.....still waiting for the dust to settle on this overall design.
Just bought a qty of NXP 2N7002P parts.
73 Kees K5BCQ
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Re: ND6T AGC implementation for uBIT-X
Snap it across a row of unplated holes.
Fri, Apr 27, 2018 at 07:44 am, Jerry Gaffke wrote:
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have the builder nip the PC board into two pieces to reduce fab costs.
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Re: ND6T AGC implementation for uBIT-X
I'd also like to see the same.
73
Ken VA3ABN
On Fri, Apr 27, 2018 at 10:44 AM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote: AGC and Pop fix want to be in different regions of the board,
and they are both operating on low level signals.
They might agree to be in the the same envelope.
Perhaps have the builder nip the PC board into two pieces to reduce fab costs.
Jerry
On Thu, Apr 26, 2018 at 10:18 pm, Jerry Gaffke wrote:
Would be worth an extra buck if it included a pop fix such as this:
? ??
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Re: ND6T AGC implementation for uBIT-X
AGC and Pop fix want to be in different regions of the board,
and they are both operating on low level signals.
They might agree to be in the the same envelope.
Perhaps have the builder nip the PC board into two pieces to reduce fab costs.
Jerry
toggle quoted message
Show quoted text
On Thu, Apr 26, 2018 at 10:18 pm, Jerry Gaffke wrote:
Would be worth an extra buck if it included a pop fix such as this:
? ??
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Re: For those keeping track of uBITX shipping times
#ubitx
Yes indeed. Mine must have been in there right along with yours. It made it to Romulus Michigan this morning and is now out for delivery.?
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Hi both,
4.7k pullup resistors fitted to Raduino board as instructed. There is now 5 volts at the encoder pins A & B, which varies 0-5-0-5-0 as the tuning knob is turned. This makes no difference, the display does not change. I will order a Nano or two, just in case. I shall be out of touch for a couple of days, be back then. Geoff
On 27 April 2018 at 12:07, John <vk2eta@...> wrote: Hello Geoff,
Here is the beta version of the Diagnostic Software. It should at least get you started. Some instructions are in the README.MD file in the top directory.
Only main menu items 1 and 2 are implemented at this stage (core I2C tests and Analog I/Os).
I need to write a manual for this but I have been too busy coding it so that you could assess your Arduino..hihi
The main menu number 2 (Analogue inputs), brings a second level menu for testing the encoder inputs, the push button, the PTT, the Keyer and the spare analogue input.
Results are displayed in a horizontal bar graph with a scale from 0 to 5V representing the value read by the inputs. That way you can see how it matches the values your voltmeter indicates on the respective pin.
Results are shown only on changes to the values read, for example when rotating the encoder, pushing the PTT or the encoder push-button etc...
If no results are shown then your Arduino cannot read analogue inputs and it would mean plan-B unfortunately.
Let me know how you go with it.
All the best,
73, John (VK2ETA)
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A steal for Arduino Experimenters
I just saw this ad from Banggood for $22:
It's got to be one of the cheapest ways to start experimenting with an Arduino. It has the Uno, but that has exactly the same resources as the Nano.
Jack, W8TEE
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Re: Ubitx average SSB output
If R63=24ohm what value should R65 be?
Il 27/apr/2018 16:03, "Skip Davis via Groups.Io" <skipnc9o= [email protected]> ha scritto: Howard did you also change out R65 that was posted here too. By the way the parts showed up here yesterday, thanks a lot. Now to find time to install them. On Apr 27, 2018, at 09:57, Howard Fidel < sonic1@...> wrote:
Yes. Change R63 to 24 ohms. The earlier
rev boards had 100 ohms there, and V3 has 47. I put another 47 ohm
resistor in parallel with the one on the board. Now I don't need
to yell into the mic.
Howard WB2VXW
On 4/27/2018 3:22 AM, iz oos wrote:
I have checked SSB output for the Ubitx using a Softrock sdr
receiver. The carrier is well aligned and the filter gives a
very good shape. Whistling is gives full output with the stock
mic element. The output seems clean but the average power during
normal speech seems to me a bit low. Is there an easy way to
increase it? 73, Franco
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Re: Ubitx average SSB output
Skip:
I didn't touch R65. Changing its value changes the DC operating
point at the collector of Q6. R63 has almost no effect on that,
since the current is set mostly by R64 which is bypassed for
audio.
Looking closer at the circuit, it is Ok to change R65 to 2K and
get the same result since the DC operating point will move down
from about 10V to 8V. It is easier thought to do the rework by
tacking a resistor across R63 rather then removing and replacing
R65. Either way works.
Howard WB2VXW
On 4/27/2018 10:03 AM, Skip Davis via Groups.Io wrote:
toggle quoted message
Show quoted text
Howard did you also change out R65 that was posted here too.
By the way the parts showed up here yesterday, thanks a lot.
Now to find time to install them.
Skip Davis, NC9O?
On Apr 27, 2018, at 09:57, Howard Fidel < sonic1@...>
wrote:
Yes. Change R63 to 24 ohms. The
earlier rev boards had 100 ohms there, and V3 has 47. I
put another 47 ohm resistor in parallel with the one on
the board. Now I don't need to yell into the mic.
Howard WB2VXW
On 4/27/2018 3:22 AM, iz oos wrote:
I have checked SSB output for the Ubitx using a
Softrock sdr receiver. The carrier is well aligned and
the filter gives a very good shape. Whistling is gives
full output with the stock mic element. The output seems
clean but the average power during normal speech seems
to me a bit low. Is there an easy way to increase it?
73, Franco
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Re: Ubitx average SSB output
I recently ordered a MAX9814 mic preamp
board with AGC. on eBay for $3.32. I will post about how it works
after I get it and test it.
Howard WB2VXW
On 4/27/2018 9:36 AM, iz oos wrote:
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Show quoted text
External audio processor or is there a way to adjust it in the
Ubitx? 73 Franco
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Re: Ubitx average SSB output
Howard did you also change out R65 that was posted here too. By the way the parts showed up here yesterday, thanks a lot. Now to find time to install them.
toggle quoted message
Show quoted text
On Apr 27, 2018, at 09:57, Howard Fidel < sonic1@...> wrote:
Yes. Change R63 to 24 ohms. The earlier
rev boards had 100 ohms there, and V3 has 47. I put another 47 ohm
resistor in parallel with the one on the board. Now I don't need
to yell into the mic.
Howard WB2VXW
On 4/27/2018 3:22 AM, iz oos wrote:
I have checked SSB output for the Ubitx using a Softrock sdr
receiver. The carrier is well aligned and the filter gives a
very good shape. Whistling is gives full output with the stock
mic element. The output seems clean but the average power during
normal speech seems to me a bit low. Is there an easy way to
increase it? 73, Franco
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I use the Retevis mic. Under $7 on
eBay. I cut off the connector and rewired it to the phono jack.
Despite what others have said about the wire colors, I found Red
it the mic, Black is ground, green is PTT.
Howard WB2VXW
On 4/23/2018 8:07 PM, Jack Purdum via Groups.Io wrote:
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Show quoted text
Back when I was in school, I once wrote an essay with a
manual graphite display generator.
Jack, W8TEE
On Monday, April 23, 2018, 7:01:26 PM EDT, William
Cullison <wa8vih@...> wrote:
I made one from two carbon blocks, in a
vertical configuration, with a dimpled area and a
pencil sharpened at both ends.
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Re: Ubitx average SSB output
Yes. Change R63 to 24 ohms. The earlier
rev boards had 100 ohms there, and V3 has 47. I put another 47 ohm
resistor in parallel with the one on the board. Now I don't need
to yell into the mic.
Howard WB2VXW
On 4/27/2018 3:22 AM, iz oos wrote:
toggle quoted message
Show quoted text
I have checked SSB output for the Ubitx using a Softrock sdr
receiver. The carrier is well aligned and the filter gives a
very good shape. Whistling is gives full output with the stock
mic element. The output seems clean but the average power during
normal speech seems to me a bit low. Is there an easy way to
increase it? 73, Franco
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Jim Sheldon
Skip Davis