Re: SWR meter with second arduino
The audio equalizer sounds really interesting.听 If you pursue it I'd really like to follow what you do.听 One of reasons I revamped the Smeter firmware was to make room in the program for additional features like this, so this is perfect.听 One of the things that will need to be dealt with is that the standalone Smeter currently only intercepts data from the Raduino to the Nextion, but not from Nextion to Raduino.听 It would not be difficult to add this feature - the wiring would have to change, of course.听 This would open up many more possibilities as well.
--
Dennis WC8C
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Re: uBitX v.6 schematic / driver and finals transistor symbols /
#ubitxv6
#v6
I think that, if it鈥檚 like Spanish, 听voi is probably more like our southern y鈥檃ll, 鈥測ou all鈥�, distinguishing you singular from you plural. In English 鈥測ou鈥� works for both. In high school I had to take a year of Latin. 听(was supposed to take 2 but they could see that was pointless) and there declensions and I was like 鈥渨hat the ???鈥�
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Re: uBitX v.6 schematic / driver and finals transistor symbols /
#ubitxv6
#v6
This is a fair assessment. There are more limitations in the pre-driver stages at higher frequencies that would limit any gains made with the RD devices. 听Its better to start at Q90 and work towards the final amplifiers.听
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Show quoted text
On Nov 22, 2020, at 8:54 AM, Evan Hand <elhandjr@...> wrote:
锘緽辞产,
The IRF510 and RD15HVF1 can both be used in this design, but are not really electrically equal, nor are they near the same cost (if you can find the RD15HVF1 part).听 For this transmitter, the RD15HVF1 would be a better part to keep the output more consistent across the bands.听听
The IRF510 was designed as a high-speed high power switch.听 The RD15HVF1 was designed to be used as a VHF power amp.听
The IRF510 has a higher voltage capability.
The RD15HVF1 has better gain at higher frequencies.
The BIG difference is in the price.听 Doing a quick search on the internet gave an eBay price of $6.00 for the RD15HVF1 vs a Mouser price for the IRF510 of $0.98 for quantity one.
Since there are other parts of the uBITX that limit the power output at 10meters, the advantage of the higher frequency of the RD15HVF1 is negated to a large extent.听 You could spend the $12+ shipping to experiment, but not really worth it to me.听 It will not solve any of the earlier boards (v3, v4) purity issues so you are spending money for, at best,听 a few watts at the higher end of the range.听 You can get some of the frequency advantages by increasing the voltage to the finals in the uBITX with the IRF510s, the design for the RD15HVF1 is 12.5volts.听 The side effect of increasing the voltage using the IRF510s is that the power goes up across all of the bands, not just the higher ones (for some this is a good thing).
Above are my interpretations of the datasheets I found and could be in error.听 I just wanted to point out that they are not truly the same, just that both will work in the uBITX as designed.
As always I am happy to get any feedback or corrections so that I can continue to learn about this hobby.
73
Evan
AC9TU
--
鈥. _._
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It's been few months we launched are Easy Bitx Kit . The kit has some new features that eleminate the earlier drawbacks of bitx kits . The manual with complete details can be found on our website . Easy Bitx has fifteen individual packets which help building in step by step.Just like the old days . The kit is also available on our website . The kit can be build for any one band . 80mt 40mt or 20mt . The website has 20mt kit by default .if you wish a 40mt kit then include a note in purchase . 80mt one we will start soon . Those who want the kit without enclosure can email us vu3sua@... Best of 73s听 Sunil听  
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Re: uBitX v.6 schematic / driver and finals transistor symbols /
#ubitxv6
#v6
The difference between "formal" pronouns and "familiar" ones is an ordinary feature of many languages: Italian is one of many including Spanish and French. Most school children in the English-speaking world are at least exposed to it.
Hello Todd
It is听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 ...听
Do you want an example:听
tu sei -> you are听
voi siete -> you are听
tu hai -> you have听
voi avete -> you have听
it is enough for you ?听....听Loris
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Re: uBitX v.6 schematic / driver and finals transistor symbols /
#ubitxv6
#v6
Good background. Regarding Farhan's language, he has a better command of English than at least half the American population. All his documentation is in perfect English.
You guys pretty much solved it. A little more backgound.
When the designer layed out the board he wanted both PA options to be supported on it. So to get both on the board he had to out both on the schematic.
When ubitx was updated, likely no changes were made to the PA.
Perhaps a note on schematic would have clarified this, but maybe a note in the designers language may not have helped many of us.
Curt
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Re: Email still coming in no email button selected
Okay for the Admin.
I have blocked this contact in my email and will see if that worked.听
Great try and suggestions but its strange that it cant be stopped with the 鈥淣o Email鈥� selection. If a solution is found for that then I will be able to get emails only on the threads I鈥檓 following as opposed to all.
Once again thanks all for the help.
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Re: uBitX v.6 schematic / driver and finals transistor symbols /
#ubitxv6
#v6
You guys pretty much solved it. A little more backgound.
When the designer layed out the board he wanted both PA options to be supported on it. So to get both on the board he had to out both on the schematic.
When ubitx was updated, likely no changes were made to the PA.
Perhaps a note on schematic would have clarified this, but maybe a note in the designers language may not have helped many of us.
Curt
|
Re: uBitX v.6 schematic / driver and finals transistor symbols /
#ubitxv6
#v6
Bob,
The IRF510 and RD15HVF1 can both be used in this design, but are not really electrically equal, nor are they near the same cost (if you can find the RD15HVF1 part).听 For this transmitter, the RD15HVF1 would be a better part to keep the output more consistent across the bands.听听
The IRF510 was designed as a high-speed high power switch.听 The RD15HVF1 was designed to be used as a VHF power amp.听
The IRF510 has a higher voltage capability.
The RD15HVF1 has better gain at higher frequencies.
The BIG difference is in the price.听 Doing a quick search on the internet gave an eBay price of $6.00 for the RD15HVF1 vs a Mouser price for the IRF510 of $0.98 for quantity one.
Since there are other parts of the uBITX that limit the power output at 10meters, the advantage of the higher frequency of the RD15HVF1 is negated to a large extent.听 You could spend the $12+ shipping to experiment, but not really worth it to me.听 It will not solve any of the earlier boards (v3, v4) purity issues so you are spending money for, at best,听 a few watts at the higher end of the range.听 You can get some of the frequency advantages by increasing the voltage to the finals in the uBITX with the IRF510s, the design for the RD15HVF1 is 12.5volts.听 The side effect of increasing the voltage using the IRF510s is that the power goes up across all of the bands, not just the higher ones (for some this is a good thing).
Above are my interpretations of the datasheets I found and could be in error.听 I just wanted to point out that they are not truly the same, just that both will work in the uBITX as designed.
As always I am happy to get any feedback or corrections so that I can continue to learn about this hobby.
73
Evan
AC9TU
|
Re: uBitX v.6 schematic / driver and finals transistor symbols /
#ubitxv6
#v6
Bob,
Yes!!!
When my mother bought her first colour television in the '70s, I was watching through the grids.听The circuit boards were the same, only the selection buttons were different.听There was a price difference...for the same TV with a different brand!!!!
The salesmen didn鈥檛 like it when you knew them. Even less now when you say you have checked on the net now (Especially auto mechanics car) LOL
cdt
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Re: Email still coming in no email button selected
Save and shift did not work.
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Re: uBitX v.6 schematic / driver and finals transistor symbols /
#ubitxv6
#v6
I just KNEW there was a logical and simple answer to this. Same item electrically but in a different "box."
Bob 鈥� KK5R
On Sunday, November 22, 2020, 6:13:09 AM EST, Raj vu2zap <rajendrakumargg@...> wrote:
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听 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鈥檚 a choice of transistor? You put one or the other?
>I don鈥檛 quite understand the diagram
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Re: uBitX v.6 schematic / driver and finals transistor symbols /
#ubitxv6
#v6
It is common for a draftsman to use the double-slash ("//") tp denote a line that continues. Some use the double-tilde ("~~") instead. It is done to denote a "broken line" where it only means that a much too long line lengthens over a section of the drawing. I is an 'unspecified length' ... nothing more. I can, however, see it as an indication that one's particular radio may be opened and one or the other transistor may be found installed as the final transistor since the two may be electrically identical but made by different manufacturing firms and the particular firm's identification marking may be found on that transistor. It could be that the manufacturer of the transistors is the same, the marking only is printed on the transistor as bought/contracted by the buyer.
At one time there were over 250 brands of tires offered in America and only 17 manufacturers. When I worked many years ago in a radio-TV shop, there was a l17-inch BW TV that when opened was found to be identical but sold under four different brands; even the diagrams used the part numbers of the different brands but the schematic was identical. Japan at one time had a catalog of cassette tape drives which were offered to different sellers so they could be put in their cases and sold as THEIR cassette players, many buyers not suspecting that the cassette they purchased was identical to the one sold for XX dollars less/more but they chose the machine they bought because the box it was in appealed more to their likes and taste.
We live in a sometimes confused world.
Bob 鈥� KK5R
On Sunday, November 22, 2020, 6:07:19 AM EST, Gerard <kabupos@...> wrote:
hello,
I had already asked the question, but I did not get an answer
on the schematic听 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鈥檚 a choice of transistor?听You put one or the other?
I don鈥檛 quite understand the diagram
for traduction fron Italien, try reverso
Avevo gi脿 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?听Si mette uno o l'altro?
Non capisco lo schema
Loris, se capisci questo, 猫 che Reverso non funziona troppo male
cdt
|
Dennis,
If for example this mounting with the lm358 already exists, just disconnect the wire of the A7 of the 1st Arduino and connect to the A7 of the 2nd (Using your app)?
What are the advantages of your assembly compared to the Lm358.
cdt
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Re: uBitX v.6 schematic / driver and finals transistor symbols /
#ubitxv6
#v6
That confused me too. Mine won鈥檛 transmit so been faulty finding. This diagram doesn鈥檛 help much 馃槀
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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
toggle quoted message
Show quoted text
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 it抯 a choice of transistor? You put one or the other?
I don抰 quite understand the diagram
|
Re: uBitX v.6 schematic / driver and finals transistor symbols /
#ubitxv6
#v6
hello,
I had already asked the question, but I did not get an answer
on the schematic听 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鈥檚 a choice of transistor?听You put one or the other?
I don鈥檛 quite understand the diagram
for traduction fron Italien, try reverso
Avevo gi脿 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?听Si mette uno o l'altro?
Non capisco lo schema
Loris, se capisci questo, 猫 che Reverso non funziona troppo male
cdt
|
Re: uBitX v.6 schematic / driver and finals transistor symbols /
#ubitxv6
#v6
Hey Todd .... HAHAHA I'm sorry ... Please "too simplistic a language" read "too simplistic language" ... HAHAHA ... BYE ... Loris
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Re: uBitX v.6 schematic / driver and finals transistor symbols /
#ubitxv6
#v6
Hello Todd
It is听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 ...听
Do you want an example:听
tu sei -> you are听
voi siete -> you are听
tu hai -> you have听
voi avete -> you have听
it is enough for you ?听....听Loris
|
Bitx40 PC Board Image Please
#bitx40
After some years of lying fallow, I have found my round tuitt to assemble Farhan's bitx40.听 I need to make Allard's recommended mods.听 It would greatly help me if some kind person could email me images of the top and bottom of the PC board.听 Many thanks in anticipation.
Kevin VK3DAP / ZL2DAP
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MadRadioModder
Sunil Lakhani
Gerard
Bob Lunsford
Raj vu2zap