开云体育

ctrl + shift + ? for shortcuts
© 2025 开云体育
  1. BITX20
  2. Messages
Expanded Topics Messages Polls
Date
Re: Bitx40 - receiver works great, but do not transmit #bitx40help

M Garza
 

Since you do not have a watt meter, and you have a multimeter, you could build a rf probe.? You can see the rf voltage and calculate the wattage.
Here is a link to one you can build.? It is very easy:


Good luck
Marco - KG5PRT?

On Feb 11, 2018 2:00 PM, "Ivan Ilyichev" <ilyichev.ivan@...> wrote:
Marco,
Thank you for your answers. I still able to receive, and it looks like sensetivity of the receiver goes up now. But i have no tools to measure it. I adjust RV136 to the top (as drawn in a circit) position, the current of whole transceiver when transmitting is 0.9 amp. Also i have no tools to measure output power. I try to lease measuring tools and see power output.

Re: BITX QSO Afternoon/Night, Sunday, February 11, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

Joe Puma
 

开云体育

I heard someone faintly. My my TX reach is better then my radios ears.?

Joe
KD2NFC?



On Feb 11, 2018, at 3:41 PM, Tom VE3THR <muzzmobility@...> wrote:

thanks for the short qso John...in the log as well.
KD2NFC Joe in NY is calling CQ on 277 but he is not hearing as well as he's tx'ing. Keep trying.

Re: BITx 40 Frequency lock during transmit

 

I doubt there's a hardware fix that solves this, best to figure out how to load one of Allard's sketches:
? ??github.com/amunters/
The bitx40_raduino_v2 is more capable than the original bitx40 branch, but v2 has slightly more hardware mods required.

You can try adding 0.1uF caps at both ends of the cable from tuning pot to raduino, not just one end.
Goes from the middle pot pin to ground.? Also, do what you can to make the 5v coming out of the LM7805 regulator
sticking out the side of the Raduino as stable as you can.? And perhaps add some caps from 5v to ground on
that cable out to the tuning pot for good measure.

The issue is that the original Bitx40 code reads the voltage of the tuning pot using a (relatively coarse) 10 bit ADC,?
and then loads up the si5351 accordingly.? The analog signal coming into the ADC is a bit noisy,
so even when not transmitting it will jump around some.? Allard's code reads the pot many times
and takes an average.? Allard also avoids random wandering about, and locks the frequency during transmit.

Jerry, KE7ER


On Sun, Feb 11, 2018 at 10:06 am, David Robertson wrote:
I have a BITX 40 who is plagued with the frequency shift problem during transmit . I know there was answers to this problem on this list list before. I understand their was a solution to this problem using hardware only not needing to load new sketches. Could someone enlighten me on this hardware change. Thanks so much
VFO connection for the bitx 40

 

I have a couple of old s meters and want to add one to my bitx 40 (I got the board from rf signals a couple of weeks ago).? I'm using the VU2ESE AGC circuit.? I know that most people are adding a VFO line to the display but I don't want to go that way.? I assume that these old S meters are relatively sensitive microampmeters..? Thanks for any suggestions.

Fred, K3TXW
Re: wrong frequency after software change. #ubitx

 

Ron,

it is just one of the Arduino examples.
Where is your software located/named?
--
73, Yvon NU6I
Lost audio from receiver

 

After some other testing on a BitX40 that was working well, it is likely that 12v (or even 24v) touched one of the speaker leads. Now I have essentially no audio out from the radio. On very strong signals and at maximum volume I can hear a weak and very distorted sound out of either the speaker or a separate speaker/mic, but it is not copyable and only just recognizeable as a signal. Listening on another receiver and watching the output, transmit seems fine. It sounds clear and undistorted and the power out is pretty normal. I checked the voltages around Q16 and they are exactly as expected in receive and transmit. The suspicion to me is that the LM386 has "blown", but there are no obvious marks on the board on any components. Is there someplace else I should look before trying to replace that chip?

As to technique for repairing that IC, if it is the problem, I seem to recall a method that involved just cutting the legs off and soldering them to a new chip. Is that a viable way to go?

While I've never owned a barrel of monkees, it? is hard to imagine that could be more fun than the BitX, but I do seem to get myself in trouble playing with it.

=Vic=
Re: Raduino seperate

 

The first SMD soldering tips were had at fritzing YouTube .?

I then watched Rossmann ( )? and his work. Got the cheaper versions of his stuff. Except for the tweezers and the soldering iron cleaner.? Cheap microscope and re-work station. Hard to position the cheap microscope but the picture is fine. Learning how to use it now.

Have heard about a solder paste (not flux) that you position near or on the pads and heat with air. And other things.



On Sun, Feb 11, 2018 at 10:08 AM, David Nelson <kc2ipx@...> wrote:
For Mike check message#27568?

On Sun, Feb 11, 2018 at 12:26 PM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
SUPER!! I hope more people will follow your example. (Love the board holder!)

Jack, W8TEE


From: KC9SGV <kc9sgv@...>
To: [email protected]
Sent: Sunday, February 11, 2018 12:10 PM

Subject: Re: [BITX20] Raduino seperate

Thanks, Jack,

Yep, been working on my SMD soldering skills...
Just waiting on my SI5351A's to arrive.
I have all the rest.

SMD soldering skill training progress here...
image1.JPG

Bernie,
KC9SGV


On Feb 11, 2018, at 10:55 AM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:

Bernie:

Don't let the SMD stuff scare you. Have you tied working with them? True, it's a little daunting at first, but not too bad once you've experimented with them. I'll be 75 in a few months and, as shaky as my hands are with bad eyes to boot, I can still work with them. Invest a couple of bucks in this experimenter's package: eBay #172880707800. It allows you to 1) try working with SMD parts, 2) has different sizes so you can determine the smallest size you can comfortably work with, and 3) might even help you overcome the SMD "dreads". There's a move afoot for homebrewers that sees more and more SMD boards coming out, mainly because part are cheap and they allow for small board sizes, hence lower costs. It's worth a try!

Jack, W8TEE




From: KC9SGV <kc9sgv@...>
To: [email protected]
Sent: Sunday, February 11, 2018 11:45 AM
Subject: Re: [BITX20] Raduino seperate

So,
We are waiting for a link to a shopping cart for spares on .

Can we also please have a link here on this forum to Mike Hagen ?
The dead Raduino issue is a huge problem.
No spares and SMD soldering required if you want to fix the Raduino yourself....

Bernie,
KC9SGV


On Feb 11, 2018, at 10:21 AM, David Nelson <kc2ipx@...> wrote:

You can get an improved raduino from Mike Hagen on this forum Dave

On Sun, Feb 11, 2018 at 11:06 AM, Ken <chase8043@...> wrote:
Hi Farhan

I had sent an email to HFSignals about ordering a seperate Raduino, as I had ordered the Bit40 before Raduino was available.

The reply I received was ' Yes. But you have to wait till our website is changed.'

It's been about 2 months and still nothing yet.

I know they are busy with existing Bitx40 and uBitx.

73

Ken VA3ABN









--
Michael Shreeve N6GRG
15901 Cloverdale Road
Anderson, CA 96007
530-410-8678
"Don't worry about a thing, 'Cause every little thing gonna be all right!" -Bob Marley
Re: BITX QSO Afternoon/Night, Sunday, February 11, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

 

thanks for the short qso John...in the log as well.
KD2NFC Joe in NY is calling CQ on 277 but he is not hearing as well as he's tx'ing. Keep trying.
Re: Second batch of uBITX shipping? #ubitx

 

开云体育

I received my uBITX today.? Ordered on 18 Dec.? It was shipped on 7 Feb.? FWIW I never received any email confirmation for having received my order or that the unit had been shipped.? Just happened to check my Paypal account yesterday and noticed that that it said my uBITX had been shipped and gave me a DHL tracking number.

Mike

K5ESS

?

From: [email protected] [mailto:[email protected]] On Behalf Of IZ8EGM Aurelio via Groups.Io
Sent: Sunday, February 11, 2018 9:48 AM
To: [email protected]
Subject: Re: [BITX20] Second batch of uBITX shipping?

?

hi Josias

I'm very calm, but I don't understand why they do not update this information on their site.
They could suspend purchases for some time. it makes no sense to continue buying while they are delivering those ordered in December.
I'll wait

73 to all
Re: BITX QSO Afternoon/Night, Sunday, February 11, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

 

John...can you try 7.274? qrm fm 278 getting worse.
Re: No power increase with higher voltage?

 

Alas, in my curiosity and inability to leave well enough alone, I came up with a brilliant plan to determine why I cannot get more power out at a higher PA voltage. Again, working on the suspicion that RF getting into the voltage booster is causing it to misread the output voltage and throttle it back to something less than 13.8v…hence the lower output with a theoretical higher supply…I bypassed the little booster and ran a 12v battery in series with the 13.8v supplying the rig, getting a bit more than I? wanted (close to 26v), but close enough, I thought, to see if that was the issue. Eureka! I go from maybe 7w out on the supply voltage into a dummy load to almost 20 in a quick test! So THAT is the problem, I need to figure a way to stabilize that booster or isolate it or something.

?

The alas part? As I was unplugging various clip leads, one brushed a speaker terminal on the open cover…and I heard a slight pop. Now I have no audio out from the rig <sigh>. The clip lead must have still been hot or something and perhaps popped the little AF amp…I sure hope not, though, as that will be a major booger to try and replace. All this after admiring how well it worked and what a nice report I got from ECARS this morning when I checked in…

=Vic=
Re: BITX QSO Afternoon/Night, Sunday, February 11, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

John P
 

I heard Tom VE3THR for a moment.
--
John - WA2FZW
Re: BITX QSO Afternoon/Night, Sunday, February 11, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

 

calling CQ on 277 but hear qso on 278 at times.
Re: BITX QSO Afternoon/Night, Sunday, February 11, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

 

I'm listening on 7277. I can hear one station way down in the noise.

Mike WB2BLJ
Re: BITX QSO Afternoon/Night, Sunday, February 11, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

John P
 

I'm on 7277. Hear someone very weak!
--
John - WA2FZW
Re: Bitx40 - receiver works great, but do not transmit #bitx40help

 

Marco,
Thank you for your answers. I still able to receive, and it looks like sensetivity of the receiver goes up now. But i have no tools to measure it. I adjust RV136 to the top (as drawn in a circit) position, the current of whole transceiver when transmitting is 0.9 amp. Also i have no tools to measure output power. I try to lease measuring tools and see power output.
Re: wrong frequency after software change. #ubitx

 

these inos were set up for the mega so you might have to adjust eprom size??
Re: wrong frequency after software change. #ubitx

 

sorry I meant to send erase eprom ino

Erase_Eprom.ino
Erase_Eprom.ino

Re: wrong frequency after software change. #ubitx

 

attached read eprom ino?

Read_Eprom.ino
Read_Eprom.ino

Re: Blue display, white digits

 

开云体育

Also the 4 corner mounting holes are sometimes off between displays by as much as a half millimeter. ?Had problems replacing a couple due to this.

W0EB

On Feb 11, 2018, at 1:30 PM, Mike Woods <mhwoods@...> wrote:

Should be plug compatible, but note that I've found that different brands/colours of 1602 displays may be slightly differently size, so it may be too tight or sloppy in your existing front panel cutout.

Mike ZL1AXG

On 12/02/18 6:56 AM, VE7WQ wrote:
Is this plug and play for the raduino?
3.3V/5V 16X2 1602 Character LCD Display,
White on Black,High Contrast
US$2.80 In stock

<lcd_display_white_on_black.jpg>


--
Mike Woods
mhwoods@...
74281 - 74300 of 115797