Re: How to get 5W on 10m?
Thanks Arv, I will try it! I had installed under Linux via wine so following your hints I can start with it!
Il 09/mar/2019 15:46, "Arv Evans" < arvid.evans@...> ha scritto: Iz Oos
Using LTSpice is not all that difficult (I learned it and I'm not that brilliant).
There are two parts to learn.? First is the schematic editor that is intuitive once you know some basic select-and-place moves.? After you have the schematic complete you would select voltage sources and measuring points.? The rest is mostly automatic when you select "RUN" mode.
Start with a small circuit segment to get a feel for how it works and then build on that experience.? In a few hours you will be an expert.
LTSpice is FREE and will run on Windows or any version of Linux with Wine installed.??
Arv _-_
Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message -------- Date: 3/9/19 12:04 AM (GMT-07:00) Subject: Re: [BITX20] How to get 5W on 10m?
What about adding a capacitor (like a 180pf or maybe a higher value) in parallel with r83? Would it increase the 10m power output without decreasing the output in the other bands (I wish I knew how to use LTspice)?
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Re: Receive Sensitivity of the V5 Board picking up broadcast interference
We had that problem, too, and Al (AC8GY) just wrote an article for CQ (Nov., 2018??) on a BCI filter for it. The BCI filter I made also works well, but Al's is a stronger filter. This is mine:
I used the one above with the Forty-9er, too, and it has a very small insertion loss. I used axial inductors, while Al's will handle more power with toroids.
Jack, W8TEE
On Saturday, March 9, 2019, 11:03:29 AM EST, Laurence Oberman <oberman.l@...> wrote:
Hello
Testing the V5 board and had mentioned on another thread from a
harmonics FCC spec point of view its looking OK to me testing CW.
I am picking up significant broadcast interference after replacing the
board in the same chassis using the identical setup for my v4 board
same antenna. It almost overwhelms the receive.
I filtered some of it out using an external filter, but if I swap
boards its gone.
Very strange, has not been seen by me on 2 prior v4 boards or my
current v4 board.
Before I start chasing it has anybody experienced this on v5. This may
be a board issue only in my case.
Regards
Laurence
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Receive Sensitivity of the V5 Board picking up broadcast interference
Hello
Testing the V5 board and had mentioned on another thread from a
harmonics FCC spec point of view its looking OK to me testing CW.
I am picking up significant broadcast interference after replacing the
board in the same chassis using the identical setup for my v4 board
same antenna. It almost overwhelms the receive.
I filtered some of it out using an external filter, but if I swap
boards its gone.
Very strange, has not been seen by me on 2 prior v4 boards or my
current v4 board.
Before I start chasing it has anybody experienced this on v5. This may
be a board issue only in my case.
Regards
Laurence
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Re: Gigaparts selling ubitx!!!
I agree.? I did send a message to them asking what board they are selling...but unless I get a response, I will order via hfsignals.?
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Re: Gigaparts selling ubitx!!!
I would buy direct from HFsignals.com? that way you know you are getting the latest version.? For the same exact price you can get it in about a week with DHL shipping (assuming you are in the continental US).
--
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Re: Gigaparts selling ubitx!!!
There you go. You won't have to deal with foreign shipping like many of us before you. Have fun. Terry - KB8AMZ Brimfield Twp, OH USA EN91hd Linux User# 412308, Ubuntu User# 34905,?PCARS#78, NAQCC#6668, QRP-ARCI#8855, SKCC#14195
Haven't confirmed the version yet...
K5AID?
Sent from my Verizon, Samsung Galaxy smartphone
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Re: Should I wait to buy a ubitx?
I thought only v3 had problems. <This is a joke as all versions have problems that eventually get ironed out.>
Regarding Kelly's lager comment. If you are worried about FCC citing you because of an infraction, maybe you should not transmit... only listen, then you don't have to worry. Before reading another later comment from you I was already chuckling.
The have been problems with all the versions up to version 5 PCB. They have been solved or hacked. For what this kit is touted to be and the price charged one, me included, can not be too critical. Yes we are spending money for product that is touted to work, however, it is also touted to be an experimental kit.
I haven't built the v3 yet. I bought it out of novelty and will assemble when I have less things to do. I am retired and have more things to do than when I was working. I have read most all the comments since version 2 PCB so I am aware of problems, hacks, and fixes. Regarding waiting to order so solutions to the current version, 5, are solved before you commit to buy. I understand. However, you could be waiting longer if a version 6 or version 7 come out before all the solutions for version 5 have been presented. Glad to read further down this page that Brutus convinced you to decide on purchasing now rather than later. Good luck with your build.
My first rig was the HW-9. I built it, because I can follow directions, and after my Novice ticket arrived in the mail I was anxious to get on the air. I had to wait one week more while a friend smarter than I with electronics to my HW-9 to determine why it didn't work when I applied power. I wasn't aware at the time of the build that diodes have polarity and wired 4 diodes backwards. That was January 1986. I have had a wonderful time playing with my radios. I am primarily a QRP OP using CW mode. So, when you uBitx is assembled, have fun with it. Best 73 or 72 KB8AMZ Terry - KB8AMZ Brimfield Twp, OH USA EN91hd Linux User# 412308, Ubuntu User# 34905,?PCARS#78, NAQCC#6668, QRP-ARCI#8855, SKCC#14195
Hi everyone! The question is should I wait to buy a ubitx due to the problems with version 5 with regard to suppression?? I have the Nextion display and case on order and have around $150 invested in it so far.??
Thanks & 73,
Kelly K5AID?
Sent from my Verizon, Samsung Galaxy smartphone
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You should try aliexpress, NOT alibaba.
On Sat, 9 Mar 2019, 8:20 pm Lawrence Galea < 9h1avlaw@... wrote: Thanks all Funny thing is that when I searched on ebay. bangood etc nothing came up.
Only found some on Alibaba but 10 including shipping cost half the price of the μbitx. Again tnx all. Lawrence
On Sat, Mar 9, 2019 at 11:23 AM MVS Sarma < mvssarma@...> wrote: The item i get is bfr93a that has upper limit of 12V ?BFR93w as made by Siemens has 15V and is in sot323 package , perhaps close to sot23 we an solder. Please search for it.
On Sat, Mar 9, 2019 at 3:33 PM MVS Sarma via Groups.Io <mvssarma= [email protected]> wrote: ?I had ordered on this seller
?but please see the datasheet.BFR93a? supply is 12V ?Hence we should not try 13.8 , little extra . No regards sarma vu3zmv
On Sat, Mar 9, 2019 at 12:41 PM Lawrence Galea < 9h1avlaw@...> wrote: Does anyone know of a decent supplier for the BFR93W? Or is it possible for hfsignals to make them available to those who purchased the μbitx? Regards Lawrence
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Thanks all Funny thing is that when I searched on ebay. bangood etc nothing came up.
Only found some on Alibaba but 10 including shipping cost half the price of the μbitx. Again tnx all. Lawrence
On Sat, Mar 9, 2019 at 11:23 AM MVS Sarma < mvssarma@...> wrote: The item i get is bfr93a that has upper limit of 12V ?BFR93w as made by Siemens has 15V and is in sot323 package , perhaps close to sot23 we an solder. Please search for it.
On Sat, Mar 9, 2019 at 3:33 PM MVS Sarma via Groups.Io <mvssarma= [email protected]> wrote: ?I had ordered on this seller
?but please see the datasheet.BFR93a? supply is 12V ?Hence we should not try 13.8 , little extra . No regards sarma vu3zmv
On Sat, Mar 9, 2019 at 12:41 PM Lawrence Galea < 9h1avlaw@...> wrote: Does anyone know of a decent supplier for the BFR93W? Or is it possible for hfsignals to make them available to those who purchased the μbitx? Regards Lawrence
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Re: How to get 5W on 10m?
Iz Oos
Using LTSpice is not all that difficult (I learned it and I'm not that brilliant).
There are two parts to learn.? First is the schematic editor that is intuitive once you know some basic select-and-place moves.? After you have the schematic complete you would select voltage sources and measuring points.? The rest is mostly automatic when you select "RUN" mode.
Start with a small circuit segment to get a feel for how it works and then build on that experience.? In a few hours you will be an expert.
LTSpice is FREE and will run on Windows or any version of Linux with Wine installed.??
Arv _-_
Sent from my Verizon, Samsung Galaxy smartphone
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Show quoted text
-------- Original message -------- From: iz oos <and2oosiz2@...> Date: 3/9/19 12:04 AM (GMT-07:00) Subject: Re: [BITX20] How to get 5W on 10m?
What about adding a capacitor (like a 180pf or maybe a higher value) in parallel with r83? Would it increase the 10m power output without decreasing the output in the other bands (I wish I knew how to use LTspice)?
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Gigaparts selling ubitx!!!
Haven't confirmed the version yet...
K5AID?
Sent from my Verizon, Samsung Galaxy smartphone
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izooz
Looks like we are approaching from opposite sides. I might try it with the unused 5 pin mike port.
Dave
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The item i get is bfr93a that has upper limit of 12V ?BFR93w as made by Siemens has 15V and is in sot323 package , perhaps close to sot23 we an solder. Please search for it.
On Sat, Mar 9, 2019 at 3:33 PM MVS Sarma via Groups.Io <mvssarma= [email protected]> wrote: ?I had ordered on this seller
?but please see the datasheet.BFR93a? supply is 12V ?Hence we should not try 13.8 , little extra . No regards sarma vu3zmv
On Sat, Mar 9, 2019 at 12:41 PM Lawrence Galea < 9h1avlaw@...> wrote: Does anyone know of a decent supplier for the BFR93W? Or is it possible for hfsignals to make them available to those who purchased the μbitx? Regards Lawrence
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?I had ordered on this seller
?but please see the datasheet.BFR93a? supply is 12V ?Hence we should not try 13.8 , little extra . No regards sarma vu3zmv
On Sat, Mar 9, 2019 at 12:41 PM Lawrence Galea < 9h1avlaw@...> wrote: Does anyone know of a decent supplier for the BFR93W? Or is it possible for hfsignals to make them available to those who purchased the μbitx? Regards Lawrence
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Show quoted text
Il 09/mar/2019 09:35, "iz oos" < and2oosiz2@...> ha scritto: The main issues are two: 1) buying in small quantities; 2) low shipping rates. For instance, sells very reliable components but requires you buy a total amount of at least 30�. Btw, they have BRF93A, not sure if they are the same thing.
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The main issues are two: 1) buying in small quantities; 2) low shipping rates. For instance, sells very reliable components but requires you buy a total amount of at least 30�. Btw, they have BRF93A, not sure if they are the same thing.
Il 09/mar/2019 08:49, "Curt via Groups.Io" <wb8yyy= [email protected]> ha scritto: I am thinking that most v4 and v5 rigs do not need them. It may depend which spur mod you do for an added 45 MHz filter. I am getting around 4 watts on 28 MHz cw with stock transistors and an added LC filter only in transmit path. I don't imagine its a huge difference on receive. I am also thinking that other vhf npn devices could be found in junk.
Curt
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I am thinking that most v4 and v5 rigs do not need them. It may depend which spur mod you do for an added 45 MHz filter. I am getting around 4 watts on 28 MHz cw with stock transistors and an added LC filter only in transmit path. I don't imagine its a huge difference on receive. I am also thinking that other vhf npn devices could be found in junk.
Curt
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Does anyone know of a decent supplier for the BFR93W? Or is it possible for hfsignals to make them available to those who purchased the μbitx? Regards Lawrence
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Re: How to get 5W on 10m?
What about adding a capacitor (like a 180pf or maybe a higher value) in parallel with r83? Would it increase the 10m power output without decreasing the output in the other bands (I wish I knew how to use LTspice)?
Il 02/mar/2019 11:47, "iz oos via Groups.Io" <and2oosiz2= [email protected]> ha scritto: I replaced the cap at the emitter of Q90 with a 470pf instead of the 0.1nF. In the meanwhile I replaced the bifilar antenna wire with a short coax. Output power on 40 marginally diminished from 15 to 12.5w about. The power on higher bands marginally increased from nearly 2w to nearly 2.5w. But the 'instability' issue with full throttle noise on SSB on 10m has disappeared and I can also not attenuate the Vogad output. Overall I am happy with this one component replacement.
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Re: uBitx V4 Audio extremely quiet and other needed mods#ubitx
Raj, I hope this is a joke and not a real true...? :/
Il 07/mar/2019 14:10, "Raj vu2zap" < rajendrakumargg@...> ha scritto:
Today they have the technology to put in the magic smoke even in the
smallest components.
Nobody can stop the release of the smoke, not even me.
Amazing!
Raj, vu2zap
At 07-03-19, you wrote:
Come on now.... that is half the
fun of ham radio.... doing something you don’t have a clue about just
to see if it works.? It’s like going to the casino and hoping
it’s your lucky day.? Ha!? When the smoke comes out you
learn an unforgettable lesson.
David J. Wilcox K8WPE’s iPad
On Mar 6, 2019, at 9:52 PM, Wayne Leake
<wayneleake@...>
wrote:
?The mention of not
plugging or unplugging the headphone/speaker with the radio on reminded
me of an incident years ago.
?I did radio repairs in my brothrs TV hop yers ago.
?Had a customer brought in a Bearcat IV scanner with no audio.
?seems he decided to install an RCA jack on the back to plug an
external speaker in.
?However, he did so with the radio plugged in and
"ON"
?Cost him a few $$ to replace the audio IC.
?A bit of a costly lesson for him.
?Always work on things with the radio off, and even unplugged,
except for making tests when you know what you are doing.
?Wayne WA2YNE
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Terry Morris
_Dave_ AD0B