Date   

Re: uBitX v.6 schematic / driver and finals transistor symbols / #ubitxv6 #v6

 

Yes, you can use one or the other but not both. The pinout is different so Farhan has provided for both
solder pads.

Raj

At 22/11/2020, you wrote:
hello,
I had already asked the question, but I did not get an answer
on the schematic of ubitx 6, there are like 2 transistors mounted in parrallele on the final stage
We see an IRF510 and a RD15HV in //.
Maybe its a choice of transistor? You put one or the other?
I dont quite understand the diagram


Re: uBitX v.6 schematic / driver and finals transistor symbols / #ubitxv6 #v6

Gerard
 

hello,
I had already asked the question, but I did not get an answer
on the schematic  of ubitx 6, there are like 2 transistors mounted in parrallele on the final stage
We see an IRF510 and a RD15HV in //.
Maybe it’s a choice of transistor? You put one or the other?
I don’t quite understand the diagram

for traduction fron Italien, try reverso
Avevo già posto la domanda, ma non ho avuto risposta
sul piano dell'ubitx 6, ci sono come 2 transistor montati in parrallele sul piano finale
Vediamo un IRF510 e un RD15HV in parallelo.
Potrebbe essere una scelta di transistor? Si mette uno o l'altro?
Non capisco lo schema

Loris, se capisci questo, è che Reverso non funziona troppo male

cdt


Re: uBitX v.6 schematic / driver and finals transistor symbols / #ubitxv6 #v6

IW4AJR Loris <lorisbollina@...>
 

Hey Todd .... HAHAHA I'm sorry ... Please "too simplistic a language" read "too simplistic language" ... HAHAHA ... BYE ... Loris


Re: uBitX v.6 schematic / driver and finals transistor symbols / #ubitxv6 #v6

IW4AJR Loris <lorisbollina@...>
 

Hello Todd

It is extremely difficult to translate Italian into English ...
Italian is a complex and unique language in concepts and definitions, English is too simplistic a language to express certain concepts ... 
Do you want an example: 

tu sei -> you are 
voi siete -> you are 
tu hai -> you have 
voi avete -> you have 

it is enough for you ? .... Loris


Bitx40 PC Board Image Please #bitx40

Kevin Luxford
 

After some years of lying fallow, I have found my round tuitt to assemble Farhan's bitx40.  I need to make Allard's recommended mods.  It would greatly help me if some kind person could email me images of the top and bottom of the PC board.  Many thanks in anticipation.
Kevin VK3DAP / ZL2DAP


Re: uBitX v.6 schematic / driver and finals transistor symbols / #ubitxv6 #v6

Todd Carney
 

Thanks, Gordon. I'm building from scratch so I didn't have a board to look at, and I wasn't smart enough to look at a picture or the layout file.

73, 
Todd K7TFC

On Sat, Nov 21, 2020, 6:30 PM Gordon Gibby <docvacuumtubes@...> wrote:
Yes, they are in parallel. I was confused the first time I saw that with an earlier schematic years ago and checked it out.  (look at the actual board)’




On Nov 21, 2020, at 20:21, Mick <Mgsebele@...> wrote:

Questa risposta non ha senso
--
 

73
Mick VA3EPM 


Re: uBitX v.6 schematic / driver and finals transistor symbols / #ubitxv6 #v6

Bob Lunsford
 

I've seen that on other schematics. Where there are more than one with the same arrangement of accompanying resisters, etc., the line is dashed and the notation "Q1, ... Qn" is written above the line to designate the transistors in the string.. It's done to conserve space on the paper and to avoid unnecessary confusion.

Want to talk about confusion with schematics? I worked for a machine tool company in New York for a year and one engineer owned his own machine tool company in the Philippines previously and he designed an automatic system for cutting rods into threaded shafts with all kinds of beveled areas, reliefs and retaining slots. The drawing for the machine was 40-ft long... The machine cut a shaft automatically in less than half an hour that took four times that when done by a human and with much more precision. Such machines are fascinating to watch, much like the first time you see a plotter drawing up a written document with fancy fonts, etc.

I know a draftsman/designer (WB4RVN) who can draw script that looks like it was done by a machine. I'm sure there are others equally talented. These people are artists in their own right. Calligraphy is indeed an art.

Bob — KK5R


On Saturday, November 21, 2020, 9:31:00 PM EST, Gordon Gibby <docvacuumtubes@...> wrote:


Yes, they are in parallel. I was confused the first time I saw that with an earlier schematic years ago and checked it out.  (look at the actual board)’




On Nov 21, 2020, at 20:21, Mick <Mgsebele@...> wrote:

Questa risposta non ha senso
--
 

73
Mick VA3EPM 


Re: uBitX v.6 schematic / driver and finals transistor symbols / #ubitxv6 #v6

Gordon Gibby
 

Yes, they are in parallel. I was confused the first time I saw that with an earlier schematic years ago and checked it out.  (look at the actual board)’




On Nov 21, 2020, at 20:21, Mick <Mgsebele@...> wrote:

Questa risposta non ha senso
--
 

73
Mick VA3EPM 


Re: Email still coming in no email button selected

Bob Lunsford
 

I have found that some browsers when you hit the Save button and it does not work, hold down the Shift button when you click Save and the system accepts it. Worth a try.

Bob — KK5R


On Saturday, November 21, 2020, 8:55:15 PM EST, jaytee1@... <jaytee1@...> wrote:


Dave,
Thanks all suggestions are great. That was already tried and Admin gave it a try, but its a weird anomaly. As suggested I left the group and re-joined but the issue continues.


Re: Email still coming in no email button selected

jaytee1@...
 

Dave,
Thanks all suggestions are great. That was already tried and Admin gave it a try, but its a weird anomaly. As suggested I left the group and re-joined but the issue continues.


Re: Email still coming in no email button selected

David Gillooly
 

I haven't followed your thread so please excuse if my suggestion has been offered.

After you check the no subscribe button scroll down the page, and hit the save button. I don't know if this is necessary but may be worth a try.

Dave, AA6RE


Re: uBitX v.6 schematic / driver and finals transistor symbols / #ubitxv6 #v6

Mick
 

Questa risposta non ha senso
--
 

73
Mick VA3EPM 


Email still coming in no email button selected

jaytee1@...
 

Arv,

I un-subscribed and re-subscribed as suggested and the problem is still ongoing. Almost Immeadiately started receiving emails.

Another other suggestions???


Re: uBitX v.6 schematic / driver and finals transistor symbols / #ubitxv6 #v6

Todd Carney
 

Loris--I guess something was lost in the translation from English to Italian and back to English, but I take it you can't answer my question. My non-robotic 'imagination' already suggested the shorthand idea, and now I'm looking for confirmation. Ciao!


Re: uBitX v.6 schematic / driver and finals transistor symbols / #ubitxv6 #v6

IW4AJR Loris <lorisbollina@...>
 

Hey Todd !!!
 
making the shoes to the flea on the schemes does not seem to me a constructive way to experiment !!!
 
I think the fantasy is dead !!! ... I have read many posts in this forum and I have come to the conclusion that humanity is shrinking more and more to simple and robotic stacks ... if something is not standardized it is out of the understanding of the robotic minds of the new computer humanity! !! !
 
Use a little imagination, if something is not "strictly" codified, USE IMAGINATION !!!! fly over the nonsense and get to the point !!!! you may discover the immense pleasure of using the brain !!!!
 
wishes of "beep .. beep" !!! 73 de IW4AJR Loris


uBitX v.6 schematic / driver and finals transistor symbols / #ubitxv6 #v6

Todd Carney
 

Folks,

On Farhan's schematic for v.6, the pre-drivers, drivers, and finals transistors are drawn in a way I've never seen before. There's solid lines from the base of one transistor through the circle body of the transistor to the base of the next transistor. Examples include Q911 & Q912, Q92 & Q93, etc.


Is this a shorthand way of drawing parallel transistors (i.e., the bases are connected together)?

Thanks! Todd K7TFC


Re: SWR meter with second arduino

Gerard
 

Hello Dennis,
Thank you for your information
So far I don’t have a second Nextion. (In 2021?)
So my edit would be a main 5-inch Nextion and a 3.2-inch Nextion in secondary. So it should work.
Afterwards, I was wondering if it was possible to add an audio equalizer that we could drive with this 2nd screen. There are circuits controllable by the arduino.
with a MSGEQ7.
see here:
MSGEQ7 breakout board ENIG Audio 7-band equalizer for Arduino, RPi, PIC, AVR,C51 | eBay
cdt


Re: New to list

iz oos
 

Before uBitx GDP was a good proxy for happiness.


Il sab 21 nov 2020 12:44 PM IW4AJR Loris <lorisbollina@...> ha scritto:
Hello Raj

It doesn't matter which bands he wants to experiment on, even in SHF they never experimented on 3.4 GHz ... but now we're losing the band all over the world! ... private interests go in the diametrically opposite direction to "man's individual happiness" as Kennedy said "gross domestic product can measure anything but not human happiness"!
that is why I would be curious to know what "experiments" our "friend" is conducting!
 
73 de IW4AJR Loris


Re: SWR meter with second arduino

Dennis C (WC8C)
 

You might be interested in my project.   I have created a major revision to Dr. Lee's standalone I2C with a bunch of enhancements, including a way to calibrate the power/swr meter.  Included is my tweaked Nextion firmware for 3.2" display that includes the power/swr meter integration.  It is at:

https://github.com/soligen2010/dspmeterv1
--
Dennis WC8C


Re: S-Meter Nextion, ask

Dennis C (WC8C)
 

Are you using the second Arduino for the SMeter?  If so, then the speed is based on how the code is written and the communication mechanism with the Nextion.  I have replacement firmware for the second Arduino that makes the SMeter much faster (but if you turn on the FFT function is gets slow again).  My project can be found at https://github.com/soligen2010/dspmeterv1

If you have not already used the second Arduino, I highly recommend you first get things working with Dr. Lee's original code, using his documentation before trying my new version. 
--
Dennis WC8C

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