Re: Loud sound on first power-up
#ubitx
To me it sounds like the input of amp getting feedback signal from output!
I suggest to try SPEAKER ground to PCB connector pin 1 instead of chassis!
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At 22-10-18, you wrote: To state the obvious, it sounds like feedback. Based on the harshness of it (square wave) I'd say it could be coming from one of the Raduino oscillators. However, you could get feedback if you have the PC board audio connector reversed, since that would cause the speaker output to feed into the mic input and the volume level to be reversed. I'm just guessing of course, and you explained how you connected it in the video. The wiring is pretty messy though, so it's possible that digital feedback is being picked up in another place incidentally. It's also possible there is bad capacitor or a short somewhere in the audio circuit. I hope that gives you somewhere to look that you haven't already thought of. Eventually you will just need to trace the received signal from the input all the way to the audio amp section to find out where it fails.
73,
Dan, W2DLC
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Re: How to purchase just ?BITX ¡®s Raduino
no recently Ashan made a post within last two weeks? and mentioned the price of? 25 notes and the email address .. have a look at the posts.? He would know money goes more or less in his pocket.? Timothy E. Fidler : Engineer BE Mech(1) Auckland , NDT specialist AINDT UT /RT3 , MT2 CB #2885,?
Telephone Whangarei?? 022? 691 8405
e: Engstr@...
----- Original Message -----
To: <[email protected]>
Cc:
Sent: Sun, 21 Oct 2018 20:15:47 -0700
Subject: Re: [BITX20] How to purchase just ?BITX ¡®s Raduino
I asked this a few months back.? No options from HFSigs.? A considerate VK on the list sold me his surplus Raduino at cost.? Good luck!?
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Re: How to purchase just ?BITX ¡®s Raduino
I asked this a few months back.? No options from HFSigs.? A considerate VK on the list sold me his surplus Raduino at cost.? Good luck!?
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Re: VK4PP uBitx LPF BANK add-on Board
Hi Again.
Here is the supplier and the relays I have purchased. they appear to be good at a reasonable price
10PCS G6S-2-12VDC 12VDC ORIGINAL OMRON Relay 8pins
10 pack so perfect for this LPF board.
I am gauging interest right now, to determine if I should do a big order of these boards?
Otherwise I have about 5 of them left from the prototype run and also 5 of the 5 filter version, email me if you want them($2) + post.
73 Nick VK4PP
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Re: uBITx V3 Stuck in Transmit
#ubitx
Going immediately into Tx mode is usually the morse keying circuit not having the 4.7k ohm resisitor installed. Also could be the PTT line earthing. My version 4 is working well. Except that I can't find a reliable method of calibrating it!
Hi Rodger,
did you manage to fix this problem? I also wired up into Sunil"s box with the frontend board and experiencing exactly the same behavior, with Raduino loading and radio going immediately into TX right after powering on the radio. Here also ubitx V3.
Thanks,
Sergej, DF6MU
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UBitx purchase without Raduino
is is possible to purchase a uBitx without the Raduino? Or does someone have one they would like to part with?
--
72 and God bless
KD4EPG
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Re: VK4PP uBitx LPF BANK add-on Board
Ok, SO just got some test results back from Warren. Look like the bare PCB has excellent isolation between input and output, 90db. I think matches with RF rated relays and separate in/out relays this board will perform very well: Here is an updated pic, a few tweaks, more ground stitching. Only downside is the $1.50 relays (x8) reuse K3(or not) or get an AXICOM relay. Maybe Ill just change to using omron G6 in the TX/RX relay too.. Buy 10 on ebay and have a spare? Thoughts?? 74 NIck VK4PP 
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Re: uBITx V3 Stuck in Transmit
#ubitx
Thanks all, found that I managed to make a short on the Sunil's pcb, once removed, no more problem.
73
Sergej DF6MU
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Re: Loud sound on first power-up
#ubitx
To state the obvious, it sounds like feedback.? Based on the harshness of it (square wave) I'd say it could be coming from one of the Raduino oscillators. However, you could get feedback if you have the PC board audio connector reversed, since that would cause the speaker output to feed into the mic input and the volume level to be reversed.? I'm just guessing of course, and you explained how you connected it in the video.? The wiring is pretty messy though, so it's possible that digital feedback is being picked up in another place incidentally.? It's also possible there is? bad capacitor or a short somewhere in the audio circuit. I hope that gives you somewhere to look that you haven't already thought of.? Eventually you will just need to trace the received signal from the input all the way to the audio amp section to find out where it fails.
73,
Dan, W2DLC
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Re: uBITx V3 Stuck in Transmit
#ubitx
I had same issue but I removed all of Sunil¡¯s Pcbs and used the single ended 8 way connectors with fly leads to hard wire to the off board components and that resolved it.? Xs max
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On 21 Oct 2018, at 20:16, Ian Reeve < ian.radioworkshop@...> wrote:
I have heard this before, I calibrated my bfo with a strongish steady amateur radio ssb transmission. Mine calibrated best at 11.997 and had no issues.
?
73
?
M0IDR
?
Sent from for Windows 10
?
I have a similar problem during calibration with my ubitx. Upon invoking calibration the LED screen tells me to tune to calibrate, (zero beat WWV)? but then immediatly jumps to transmit.
Am I doing something wrong? I am using original ubitx sketch.
Thanks
Barry
K3BO
Have you possibly forgotten the resistor on the board, missing that out will I believe put ubitx straight into transmit.
?
I used the authentic metal enclosure in blue which came with the extra circuit boards and fitted the resistor as shown on the layout. Everything fine on mine.
?
73
?
Ian M0IDR
?
Sent from for Windows 10
?
Hi Rodger,
did you manage to fix this problem? I also wired up into Sunil"s box with the frontend board and experiencing exactly the same behavior, with Raduino loading and radio going immediately into TX right after powering on the radio. Here also ubitx V3.
Thanks,
Sergej, DF6MU
--
Keith Baker - Communications technician (retired)
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Here¡¯s a version that I ¡°enhanced¡±. Mike K5ESS ?
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From: [email protected] [mailto:[email protected]] On Behalf Of micah@...
Sent: Saturday, October 20, 2018 8:36 PM
To: [email protected]
Subject: Re: [BITX20] uBitx schematic ? Ashhar,
Nudge. I'm sure you're incredibly busy, and the v3 boards are ancient history at this point. But they're important history for those of us with that hardware.
(Or perhaps the latest files are out there, and only the link on the page needs to be updated)
:)
Cheers et 73, -m
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Re: uBITx V3 Stuck in Transmit
#ubitx
I have heard this before, I calibrated my bfo with a strongish steady amateur radio ssb transmission. Mine calibrated best at 11.997 and had no issues.
?
73
?
M0IDR
?
Sent from for Windows 10
?
toggle quoted message
Show quoted text
I have a similar problem during calibration with my ubitx. Upon invoking calibration the LED screen tells me to tune to calibrate, (zero beat WWV)? but then immediatly jumps to transmit.
Am I doing something wrong? I am using original ubitx sketch.
Thanks
Barry
K3BO
Have you possibly forgotten the resistor on the board, missing that out will I believe put ubitx straight into transmit.
?
I used the authentic metal enclosure in blue which came with the extra circuit boards and fitted the resistor as shown on the layout. Everything fine on mine.
?
73
?
Ian M0IDR
?
Sent from for Windows 10
?
Hi Rodger,
did you manage to fix this problem? I also wired up into Sunil"s box with the frontend board and experiencing exactly the same behavior, with Raduino loading and radio going immediately into TX right after powering on the radio. Here also ubitx V3.
Thanks,
Sergej, DF6MU
|
Re: uBITx V3 Stuck in Transmit
#ubitx
I have a similar problem during calibration with my ubitx. Upon invoking calibration the LED screen tells me to tune to calibrate, (zero beat WWV)? but then immediatly jumps to transmit. Am I doing something wrong? I am using original ubitx sketch. Thanks Barry K3BO
Have you possibly forgotten the resistor on the board, missing that out will I believe put ubitx straight into transmit.
?
I used the authentic metal enclosure in blue which came with the extra circuit boards and fitted the resistor as shown on the layout. Everything fine on mine.
?
73
?
Ian M0IDR
?
Sent from for Windows 10
?
Hi Rodger,
did you manage to fix this problem? I also wired up into Sunil"s box with the frontend board and experiencing exactly the same behavior, with Raduino loading and radio going immediately into TX right after powering on the radio. Here also ubitx V3.
Thanks,
Sergej, DF6MU
|
Re: uBITx V3 Stuck in Transmit
#ubitx
Have you possibly forgotten the resistor on the board, missing that out will I believe put ubitx straight into transmit.
?
I used the authentic metal enclosure in blue which came with the extra circuit boards and fitted the resistor as shown on the layout. Everything fine on mine.
?
73
?
Ian M0IDR
?
Sent from for Windows 10
?
toggle quoted message
Show quoted text
Hi Rodger,
did you manage to fix this problem? I also wired up into Sunil"s box with the frontend board and experiencing exactly the same behavior, with Raduino loading and radio going immediately into TX right after powering on the radio. Here also ubitx V3.
Thanks,
Sergej, DF6MU
|
Re: uBITx V3 Stuck in Transmit
#ubitx
Hi Rodger,
did you manage to fix this problem? I also wired up into Sunil"s box with the frontend board and experiencing exactly the same behavior, with Raduino loading and radio going immediately into TX right after powering on the radio. Here also ubitx V3.
Thanks,
Sergej, DF6MU
|
Re: Harmonics and Relay Replacement
Kees
Will this pcb for sale? ?Got your refund on the other one
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On Oct 20, 2018, at 7:34 PM, Kees T < windy10605@...> wrote: This is another pass on the LPF board....being tested.? 1) this one is meant to install under the covers of the uBITX, Board is 68mm x 48.4mm. 2) uses the existing uBITX LPF components moved over to small plug-in LPFs (can also use the QRP Labs ? ? LPFs or your own LPF design), 3) uses basically the physical layout of the LPF board as outlined by Allison in the Wiki section, the high band ? ? LPF?is ALWAYS in the circuit Rx or Tx. 4) if Tx voltage is present, the LPF board is routed to T11 and removed from the Rx section which is grounded. 5) if one of the bands, other than the high band, is selected by the TxA, TxB, or TxC, it inserts that LPF AND the ? ? high band LPF in series for Tx. Really reduces high frequency harmonics.? 6) has a 1 mH inductor in series with each relay coil for further isolation, 7) uses the smaller NAiS TQ2-H-12V relays. Good relay I have used before.? 8) extensive use of flood-fill ground and ground stitching 9) interfaces provided are: T11 (near the PA, happens to have a SMA installed for test), Ant (happens to have ? ? a SMA installed for test), Rx (near the line to Rx), TxA, TxB, TxC, Tx Voltage, and Ground 73 Kees K5BCQ  ? <MVC_020S.JPG>
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Re: Fun with Pennsylvania QSO Party AA2MZ/QRP
My experience in QRP contesting is that trying to compete at the outset is difficult at best. However, trying again towards the end of the contest makes a lot of difference as the "big guns" seem to be more willing to dig us out of the noise than at the beginning of the contest.
Jack, W8TEE
On Sunday, October 21, 2018, 10:56:21 AM EDT, taycheel@... <taycheel@...> wrote:
But that's physics, not psychology.
I did not call QRP when I was calling and I did not get one, not one, reply. Yet I QSO'ed many stations. I think many contesters don't bother with weak stations until things get very slow. It's more points faster to contact the strong stations. I heard many stations just a bit over the noise that I didn't bother answering either. Shame on me. I guess that shows my inexperience as a single-op QRP . My experience contesting is with multi-op "big" stations.?
So here's where I think the psychology come in: When I'm on the loud end and I? hear QRP, I assume the station will be hearing *me* very clearly and half the battle is won. I can help the other end give me the information I need, if any. Well, that's how I did it, but its been 20 years since I was an avid contester.
Another mistake I think I made was choosing "single mode." I'll run mixed mode next contest so I can slide my CW call into a pile-up. I'v often got "the CW station" as an answer in the past... this stuff is coming back to me but slowly!
73, Ed aa2mz
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Re: Fun with Pennsylvania QSO Party AA2MZ/QRP
But that's physics, not psychology.
I did not call QRP when I was calling and I did not get one, not one, reply. Yet I QSO'ed many stations. I think many contesters don't bother with weak stations until things get very slow. It's more points faster to contact the strong stations. I heard many stations just a bit over the noise that I didn't bother answering either. Shame on me. I guess that shows my inexperience as a single-op QRP . My experience contesting is with multi-op "big" stations.?
So here's where I think the psychology come in: When I'm on the loud end and I? hear QRP, I assume the station will be hearing *me* very clearly and half the battle is won. I can help the other end give me the information I need, if any. Well, that's how I did it, but its been 20 years since I was an avid contester.
Another mistake I think I made was choosing "single mode." I'll run mixed mode next contest so I can slide my CW call into a pile-up. I'v often got "the CW station" as an answer in the past... this stuff is coming back to me but slowly!
73, Ed aa2mz
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Re: Fun with Pennsylvania QSO Party AA2MZ/QRP
Thank you! ,,,, it wasn't as much fun as I thought it would be: me sitting on a frequency and the world piling up to QSO ... it didn't happen.
It was about the same as last week.I worked just about everyone I called in the East Cost Maine to Virginia and west to Illinois. But no one, not one station answered when I called CQ.?
Since I build the x40, i've heard out to California (I'm in western NY) , south to north South America and a lot of Europe. I think the receiver is doing its job.?
So thanks for looking Ian!?
I've got a MiniPA 70? (eBay 70 maybe 50 watt linear amp for $16 USD) on the bench almost ready to go, but that's a different thread.
- Ed.T aa2mz
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Raj vu2zap
VK3HN
Nick VK4PP
TA2WK