Date   

Re: Heat Sinks on finals

VE3MIC
 

As long as output transistor remains electrically isolated from the heatsink it does not matter. The tab of the TO220 case must be kept isolated(not grounded).
73 de Mike


On Tue., 16 Jun. 2020 at 8:06 a.m., Jhard356@...
<Jhard356@...> wrote:
Should the bottom of the heat sink rest on the pc board?




Re: Cold temperature power up issue

Bill Cromwell
 

Hi,

I have experienced some cold xtals not starting but the temps were well below freezing. A poor solder joint or 'hairline' crack would be sensitive to temperature. Apply some mechanical pressure with a plastic tool to see if you can find a sensitive place.

73,

Bill KU8H

bark less - wag more

On 6/16/20 7:46 AM, Jeff Debes wrote:
I’ve noted that my V6 unit fails to initialize properly if the units temperature falls to around 40 degrees Fahrenheit.
If warmed to 65-70f , it will initialize and operate normally.
Is there any history of this issue?
Should there be / is there a display and main board production test at lower temperatures?
Jeff
AC2JB


Heat Sinks on finals

Jhard356@...
 

Should the bottom of the heat sink rest on the pc board?


Cold temperature power up issue

Jeff Debes
 

I’ve noted that my V6 unit fails to initialize properly if the units temperature falls to around 40 degrees Fahrenheit.
If warmed to 65-70f , it will initialize and operate normally.
Is there any history of this issue?
Should there be / is there a display and main board production test at lower temperatures?

Jeff
AC2JB


--
*jeff.debes@...*


Odd Problem with new v6 - Shorted RXD/TXD pins on Raduino

 

I got a new v6 kit with the enclosure this past weekend.
My daughter helped put it together.  With the COVID-19
stuff going on, everyone's working from home and has
staked out their territories leaving the bed the only
relatively uncluttered spot to work.

Put it all together and it was good as-was, so I decided to start
messing with it.

First up was loading Reed's code.  (Thanks for your help Reed!)
It wouldn't load.
I tried another nano I had on hand, no go.  It had the pins in the right way.
I ordered got some more Sunday and tried again.
Nope.

Then I tried loading with the nano pulled from the radio.
It worked.  The original did too.   Oh well, it's good to have spares.
Put it back together and it works, but I can't load with the nano in the raduino board.
I tried CAT too, no luck.

"in the raduino board" kept bouncing around in my head, so
I removed it (not my head).  There was some crusty film on the PCB.
I measured a short between RXD & TXD, so I did some cleaning/poking/scraping
and cleared the short and tried a fresh nano.
The short may have damaged the previous two.  I'll check them out another time.

I can now upload now and CAT works with FT-817 Commander,
but not yet with WSJT-X which is giving the following error:

               

I'll take it to work to check the spectrum on the good SA this week.

Next is an AGC circuit from Kit-Projects and then maybe try the Teensy.

John
K6JDS


Hfsignals send ubitx on 3rd of march #ordering #ubitxv6 #homebrew #v6

Burçak Çubukçu
 

Acording to tracking number my ubitx is still waiting in Mumbai since 14th of March. Probably reason of this is pandemics. Anyone has same problem? I don't have any clue how serious covid-19 in India. Has anybody know anything about when shipments will start again in India? 
Thanks,
de TA2EE Burçak Cubukcu


Re: V6 with TSW nano teensy adapter upload problem

Rene
 

Hallo Mark, have you tryed to load the softeware with the old megaloader under arduino?? Ik tryed to upate mine and was not succesfull but when i started to use the old loader all the problems have been fixed(ecceot the hardware problems🤔)
Regards
Rene 
Netherlands


Re: How to reduce RF power out stepwise with a ubitx V3?

Jep
 

Thank you Raj, that is a good idea: it would be a quick and easy way to solve my problem. Great. 
Cheers
Jep


Re: Si5351 weirdness

Ashhar Farhan
 

heatsink? i was complaining about the antuino. it doesn't have a heatsink.


On Mon, Jun 15, 2020 at 8:44 PM <Jhard356@...> wrote:
When my Bitx V6 arrived it had the out put transistors mounted so that the bottom of the heat sink was 5/8 of a inch off of the mother board. I was always told to keep these leads as short as possible. Did anyone else have theirs mounted high like this?




V6 with TSW nano teensy adapter upload problem

mark bodlovich
 

My V6 works normally with original nano. Purchased nano adapter and teensy 4. I cant figure why my teensy wont upload the sketch V1.14 or V1.12 correctly. All i get is the splash screen with version # and the main screen. The touch screen does nothing .Main tuning knob works and pushing it gets options at bottom to appear.  I can see the screen reset and version # changes when done uploading so I have serial link. I have tried many things , different W10 computers, reloading arduino and teensy duino many times putting in required libraries ( i think) as per website. Sketch verifies, compiles and uploads. I have purchased extra teensys and get same results. Used ESD precautions when handling as well. I must be missing something but I dont know what it is. Has anyone seen this before and or has any insight as to what is happening. My next idea is to try a Linux computer if I can get the arduino and tensy duino installed. I dont know what to do next. Any help would be appreciated. I would even send my teensy to someone that could upload it for me.

Thanks, N7HWR


uBITX 6.1 for sale

kbtgw <k2tgw@...>
 

I find it too clunky for mobile usage. Need something smaller. Works fine [seen better mics].  $155 shipped
   Les,  K2TGW     k2tgw@...


Re: BITX Discussed At Virginia Radio Club Meeting

Arv Evans
 

Reed

I think things have become confused.  Someone asked about "UNIX Time" and 
I responded to that question.

The video timestamp  "290 views
Jun 13, 2020" is shown just below the video
image on my Debian Linux video player, but you probably already have that 
information.  If you want more metadata from a video file it is usually available 
in the form of EXIF data (and other formats as well) that is hidden inside the 
file.  Metadata viewers can extract this information.



If you are asking about UNIX Time as it applies to Windows OS,   that was 
exposed in Windows 4.0, but I do not think it has been open since that release 
for 
users to access.  I may be wrong as I do not use Windows OS on any local 
computer.  

Arv
_._


On Mon, Jun 15, 2020 at 2:18 AM Reed N <greenkid336600+groupsio@...> wrote:
I was referring to the YouTube video's time stamp (https://www.youtube.com/watch?v=VHSr-v4QO7Q&t=16m52s), which is not explicitly related to any computer time keeping strategy, so not sure what you're trying to say, Arv. Where will Unix time be included?


Reed


Re: Bitx40 Keeps On Tickiing

Bill Cromwell
 

Hi,

Apparently not a Heathkit Apache case ;)

73,

Bill KU8H

bark less - wag more

On 6/15/20 10:14 AM, Jack, W8TEE via groups.io wrote:
Mornin' Pete!
I did something similar, but for Diz's 5 Watter using an (almost) waterproof Apache case from Harbor Freight. They go on sale for $10 from time-to-time. I left all of the connectors "inside" the case so if I drop it in a lake, not only will it float long enough to retrieve it, it will be dry when I catch up to it. (Not that I'm clumsy or anything...) Works well!
Inline image
Jack, W8TEE
On Monday, June 15, 2020, 10:03:33 AM EDT, N6QWHAM@... <n6qwham@...> wrote:
Many years ago the ad for the Timex watch touted it just keeps on ticking. The Bitx40 not unlike the Timex watch keeps on Ticking. Recently I was gifted two Bitx40 boards and one inoperative Raduino. I set about fabricating a controller with LCD and in the process added USB capability (by shifting the LO to 19 MHz) so it could be used on FT-8. But now how to "box it". I found a rather neat plastic box that was intended to be a case to carry First Aid Supplies. The case can be purchased from Amazon sans the supplies. The case is durable and has a sealed gasketed lid. For the LCD and Controls I built a sub-panel and painted it my signature Juliano Blue. This enclosure is ideal as it easily contains the Bitx40 plus room for batteries, antenna wire, microphone etc. The bonus --a carrying handle.
Pete N6QW
--
Jack, W8TEE


Re: Si5351 weirdness

Jhard356@...
 

When my Bitx V6 arrived it had the out put transistors mounted so that the bottom of the heat sink was 5/8 of a inch off of the mother board. I was always told to keep these leads as short as possible. Did anyone else have theirs mounted high like this?


Re: Si5351 weirdness

 

I've seen this and its always the capacitor!

Raj

At 15/06/2020, you wrote:
Hans and the group,
This is going to be fun. Today, I was fooling around with the Antuino and suddenly, it wouldn't read the return loss. I checked the driving signal. It was on, but off by about 200 khz. Naturally, the measurement receiver wouldnt pick it up.
I added serial.print into thr source code. Everything seemed to be perfect. Finally on a dare, I probed the crystal, it was at 27.2 mhz! I resoldered, etc. After a few minutes, it jumped back to its standard 27 mhz frequency.
I have never seen anything like this on the si5351. Spurious crystal modes are not uncommon. Anyone else has experienced this too?
- f


Si5351 weirdness

Ashhar Farhan
 

Hans and the group,
This is going to be fun. Today, I was fooling around with the Antuino and suddenly, it wouldn't read the return loss. I checked the driving signal. It was on, but off by about 200 khz. Naturally, the measurement receiver wouldnt pick it up.
I added serial.print into thr source code. Everything seemed to be perfect. Finally on a dare, I probed the crystal, it was at 27.2 mhz! I resoldered, etc. After a few minutes, it jumped back to its standard 27 mhz frequency.
I have never seen anything like this on the si5351. Spurious crystal modes are not uncommon. Anyone else has experienced this too?
- f


Re: Bitx40 Keeps On Tickiing

Jack, W8TEE
 

Mornin' Pete!

I did something similar, but for Diz's 5 Watter using an (almost) waterproof Apache case from Harbor Freight. They go on sale for $10 from time-to-time. I left all of the connectors "inside" the case so if I drop it in a lake, not only will it float long enough to retrieve it, it will be dry when I catch up to it. (Not that I'm clumsy or anything...) Works well!

Inline image

Jack, W8TEE


On Monday, June 15, 2020, 10:03:33 AM EDT, N6QWHAM@... <n6qwham@...> wrote:


Many years ago the ad for the Timex watch touted it just keeps on ticking. The Bitx40 not unlike the Timex watch keeps on Ticking. Recently I was gifted two Bitx40 boards and one inoperative Raduino. I set about fabricating a controller with LCD and in the process added USB capability (by shifting the LO to 19 MHz) so it could be used on FT-8. But now how to "box it". I found a rather neat plastic box that was intended to be a case to carry First Aid Supplies. The case can be purchased from Amazon sans the supplies. The case is durable and has a sealed gasketed lid. For the LCD and Controls I built a sub-panel and painted it my signature Juliano Blue. This enclosure is ideal as it easily contains the Bitx40 plus room for batteries, antenna wire, microphone etc. The bonus --a carrying handle.

Pete N6QW

--
Jack, W8TEE


Re: Bitx40 Keeps On Tickiing

Dale Parfitt
 

As always, nice  work Pete,

Dale W4OP

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of N6QWHAM@...
Sent: Monday, June 15, 2020 9:48 AM
To: BITX20@groups.io
Subject: [BITX20] Bitx40 Keeps On Tickiing

 

Many years ago the ad for the Timex watch touted it just keeps on ticking. The Bitx40 not unlike the Timex watch keeps on Ticking. Recently I was gifted two Bitx40 boards and one inoperative Raduino. I set about fabricating a controller with LCD and in the process added USB capability (by shifting the LO to 19 MHz) so it could be used on FT-8. But now how to "box it". I found a rather neat plastic box that was intended to be a case to carry First Aid Supplies. The case can be purchased from Amazon sans the supplies. The case is durable and has a sealed gasketed lid. For the LCD and Controls I built a sub-panel and painted it my signature Juliano Blue. This enclosure is ideal as it easily contains the Bitx40 plus room for batteries, antenna wire, microphone etc. The bonus --a carrying handle.

Pete N6QW


Bitx40 Keeps On Tickiing

N6QWHAM@...
 

Many years ago the ad for the Timex watch touted it just keeps on ticking. The Bitx40 not unlike the Timex watch keeps on Ticking. Recently I was gifted two Bitx40 boards and one inoperative Raduino. I set about fabricating a controller with LCD and in the process added USB capability (by shifting the LO to 19 MHz) so it could be used on FT-8. But now how to "box it". I found a rather neat plastic box that was intended to be a case to carry First Aid Supplies. The case can be purchased from Amazon sans the supplies. The case is durable and has a sealed gasketed lid. For the LCD and Controls I built a sub-panel and painted it my signature Juliano Blue. This enclosure is ideal as it easily contains the Bitx40 plus room for batteries, antenna wire, microphone etc. The bonus --a carrying handle.

Pete N6QW


Re: How to check LPF / relay failure that may be lowering power output

 

Sumit,

One of your filter relays or associated components in the filter may have failed.

Higher power means higher voltage across capacitors etc.

Raj

At 15/06/2020, you wrote:
I get about 12 watts at 80m which progressively goes down to about 6 / 7 watts at 30m when measuring with a watt meter in CW mode. From 20m on-wards the watt-meter momentarily deflects when the key is pressed with ptt clicking in and instantly the needle goes down no transmit power after that. If i try test point 7 on the board with a wire to the watt-meter on 20m i get a deflection indicating about 5 watts progressively going down to 1 watt or less in 10m. Testing from test point 8 for these bands shows no deflection other than when the ptt clicks like earlier. I doubt something with the LPF's and /or the relays, how can i check this. Replacing relays is difficult - can anyone guide me a troubleshoot?
I was calling CQ on CW on 20m with 24 volts to the PA, the meter was showing power output around 25 watts and then came smoke. The transmit / receive was not working after that and after replacing both the 510's, Q15 and K1 things got OK except transmitting on 20m till 10m.
I am using v5 board with the cec 1.2

Sumit Basu
VU2DTF