Date   
Re: Volume with switch

Ian Reeve
 

Dear Eddie,

 

Here are some pics to help you:

 

Wiring of tx/rx led connections to board

Wiring of USB rear connector- a mini usb plug is inserted into the socket on the Arduino and then wired as shown to the USB socket on the rear panel.

Alternatively a USB mini to standard USB lead could be used and left loose out of the back of the case.

 

Re the switched pot, please see pictures on my separate email to you

 

73

 

Ian M0IDR

 

 

Sent from Mail for Windows 10

 


From: BITX20@groups.io <BITX20@groups.io> on behalf of Ian Reeve <ian.radioworkshop@...>
Sent: Thursday, August 2, 2018 9:07:50 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Volume with switch
 

Hi Eddie,

 

I just am waiting for my phone to charge up and I will send you a pic of the led wiring and the volume pot wiring.

 

73

 

Ian

Ian.radioworkshop@...

 

 

 

Sent from Mail for Windows 10

 


From: BITX20@groups.io <BITX20@groups.io> on behalf of Eddie Esserman <ee@...>
Sent: Thursday, August 2, 2018 3:22:32 AM
To: BITX20@groups.io
Subject: [BITX20] Volume with switch
 
Anyone got a drawing or picture of the switch on the pot?
thanks.
Eddie

Re: hacking bitx40 for 20 metre #bitx40

Allard PE1NWL
 

Terry,
The latest Raduino sketch v1.28 provides this feature:

Prevention of out-of-band transmissions

The software restricts transmission to the 40m ham band allocation. By default this is ITU region 2 (Americas: 7000-7300 kHz). If you are located in a different ITU region, uncomment ONE of the lines 44-47 depending on your location, and recompile.

If the PTTsense-mod is installed, out-of-band TX will be disabled, but RX is still possible outside the band. If the PTTsense-mod is NOT installed, both TX as well as RX will be disabled outside the band.


Download it from https://github.com/amunters/bitx40

73 Allard PE1NWL

Re: Volume with switch

Ian Reeve
 

Hi Eddie,

 

Pics of led wiring and switched pot

I did not use the supplied one as the knob did not fit the spindle but have shown the one as supplied being held.

Wiring looking at the back of the pot:

 

Top three terminals  Left   green (earth)  Middle orange (feed to audio amp) Right yellow audio in to audio section.

These are the colours used as shown on the instruction wiring sheets.On mine,the connections come from the small pcb supplied and so might confuse.

The two terminals at the back on theblack moulding are the switch and on mine I wired them across the push button on the rear panel which remains in the OFF position,the switch on the pot now switches the rig.

 

On mine you will see on the switched pot:  left screen (bare) earth

Centre (red) feed to audio amp

Right (white) audio in from receiver section for audio amp.

 

The two thicker wires wrapped   (red and orange) are the ON/OFF switch terminals on my pot.

 

The LED connecting three wires as shown in the earlier email,are connected to the led as follows:

 

In my case white,blue and red

 

White goes to centre pin of led (earth)

The other two go to the remaining pins via current limiting resistors

On mine I used 1.6K ohms but that value might need increasing as the led is rather bright.

 

Temporarily wire in the led and when the rig is switched on to receive you want the led green to be on ( in my case the led flat side is the red wire,the round side is the blue wire) to be on in receive.

So if you use my colours and wire as described,it should be green (rx) and red(tx)

 

Any problems,contact me directly if you wish on ian.radioworkshop@...

 

73

 

Ian M0IDR

 

Sent from Mail for Windows 10

 

From: Ian Reeve
Sent: 02 August 2018 10:03
To: BITX20@groups.io; ee@...
Subject: Re: [BITX20] Volume with switch

 

Dear Eddie,

 

Here are some pics to help you:

 

Wiring of tx/rx led connections to board

Wiring of USB rear connector- a mini usb plug is inserted into the socket on the Arduino and then wired as shown to the USB socket on the rear panel.

Alternatively a USB mini to standard USB lead could be used and left loose out of the back of the case.

 

Re the switched pot, please see pictures on my separate email to you

 

73

 

Ian M0IDR

 

 

Sent from Mail for Windows 10

 

From: BITX20@groups.io <BITX20@groups.io> on behalf of Ian Reeve <ian.radioworkshop@...>
Sent: Thursday, August 2, 2018 9:07:50 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Volume with switch

 

Hi Eddie,

 

I just am waiting for my phone to charge up and I will send you a pic of the led wiring and the volume pot wiring.

 

73

 

Ian

Ian.radioworkshop@...

 

 

 

Sent from Mail for Windows 10

 

From: BITX20@groups.io <BITX20@groups.io> on behalf of Eddie Esserman <ee@...>
Sent: Thursday, August 2, 2018 3:22:32 AM
To: BITX20@groups.io
Subject: [BITX20] Volume with switch

 

Anyone got a drawing or picture of the switch on the pot?
thanks.
Eddie

 

Re: hacking bitx40 for 20 metre #bitx40

terry hughes
 

hi

do i need to hack the receiver input filter

terry

Re: Off Topic: Gap Antennas

Karl Heinz Kremer, K5KHK
 

One thing you can try is to change your DNS server configuration. You are very likely using your orovider’s DNS servers. You can change that to e.g. OpenDNS or Google:

http://opendns.com
https://developers.google.com/speed/public-dns/
--
Karl Heinz - K5KHK

Re: ND6T AGC and Click kit wiring notes

Don, ND6T
 

Go for it, Nick! It seems that there are quite a few looking for some through-hole kits.
Don't forget, this circuit also works the same on BITX40s as well.
GL, - Don

Re: Off Topic: Gap Antennas

Alan de G1FXB
 

There are reports from 3 different EU countries that the site doesn't resolve there.
Using a VPN to provide a point of presence within the US does.....
This would indicate it's the source site not the destination(s) that is experiencing difficulties, else there are EU DNS sanctions being applied  :-P

Who wants to try the site from elsewhere, Australasia?

Alan

On 02/08/2018 11:32, Karl Heinz Kremer, K5KHK wrote:
One thing you can try is to change your DNS server configuration. You are very likely using your orovider’s DNS servers. You can change that to e.g. OpenDNS or Google:

http://opendns.com
https://developers.google.com/speed/public-dns/
--
Karl Heinz - K5KHK

Re: Off Topic: Gap Antennas

Diane Bruce
 

On Thu, Aug 02, 2018 at 12:25:45PM +0100, Alan de G1FXB via Groups.Io wrote:
There are reports from 3 different EU countries that the site doesn't
resolve there.
If you whois gapantenna.com you'll find they have 3 nameservers set up
Name Server: NS1.VEROSOFT.COM
Name Server: NS1.KEYMANAGED.COM
Name Server: NS2.VEROSOFT.COM
DNSSEC: unsigned

ns1.verosoft.com. 3338 IN A 199.189.195.10
ns1.keymanaged.com. 10469 IN A 50.253.178.50
ns2.verosoft.com. 3307 IN A 199.189.195.11

ping ns1.keymanaged.com
PING ns1.keymanaged.com (50.253.178.50): 56 data bytes

It's dead Jim.

Fortunately the other two nameservers work

gapantenna.com. 1922 IN A 199.189.195.12

My advice (unless you are comfy with making temporary local host changes)
is to restart the browser and hope it catches one of the two working NS

Who wants to try the site from elsewhere, Australasia?

Alan
Diane
--
- db@... db@... http://www.db.net/~db

BITX QSO Afternoon/Evening, Sunday, August 5, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.

John P
 

BITX QSO Afternoon/Evening, Sunday, August 5, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.

Join us as we make contacts with our BitX-40s or uBitXs or anything else on 7.277 MHz in 40 meters!

This is a worldwide event for BitX40 (and other QRP) stations starting at 3PM and 7pm in each time zone. To participate, call CQ BitX on Sunday, starting at 3PM and/or 7PM your local time. The BitX QSO Night continues through the evening and conditions usually improve after sunset, so it is worthwhile to participate later in the evening.

Suggested Best Operating Practices:

Work at QRP power levels unless conditions require more power.
Call and listen for CQ BITX on the hour and every quarter hour.
It is helpful if you call CQ BITX with your callsign, name and location. 
Repeat your callsign a number of times during your CQ BITX and during QSO's.
Start a QSO by confirming the callsign, location, name and signal report of the other operator.
Say the callsign, name and location of the other operator so others can hear.
If the frequency is busy, avoid long conversations.
After your initial QSO is complete, ask if there are any other stations who would like to contact.

Report your QSO's, discuss propagation, noise, signal reports, audio reports, antenna type, etc. in this thread.

This is an undirected, scheduled event.  The BITX QSO Night relies on you to call CQ BITX to initiate contacts with other stations, so warm up that final and transmit a few calls on Sunday evening.  Talk to you then!
--
John - WA2FZW

Re: Ubitx will be here tomorrow. Any suggestions for a Bitx newbie #ubitx

EI_Frank
 

Don't do the Tune Up Calibration unless you absolutely have to.

Re: ubitx and case for sale

Timothy Fidler
 

I am not interested in purchase but if you do sell and want to stay in the hobby , without much more money you could buy a CS  SSB transceiver from http://crkits.com/

He has an agent in Nth America.  Unless he forces you to go direct to the US agent  then you can purchase at USD 120, 10 shipping and about $25 assly charge as I am guessing you would not be willing to assemble and test because of risk of it not working and then your getting stuck.   THIS is a MONO band transmitter and it is blind. you know you are in band because it it DDS controlled , ie a local oscillator from a quartz time based  but unless you build yourself a marker generator you don't know where exactly you are (you can however put a calibration cheat around the dial). These use a generic IRF 530 Mosfet as the final  so if the final blows you can replace it for around $1.50 or so. It is theoretically possible to convert this transceiver so it can do CW as well though it would give the internal relays a  bit of a hammering. You may never want CW.   The other option is another monobander from OzQRP  which is Run by Leon in Canberra area.  He sells a sort of Bitx .. all anlogue and you can either make your own VFO or use his CVS I think he calls it.. which sells for USD 45 equivalent and is a very slick looking unit with a multiline illuminated pixel display doodad.  If you want to roll your own VFO you can use one of  A Farhan's designs .. I will attach a rather sleek one .. you can get the FET from either Rockby electronics in Melbourne  or from Dan's kits and parts in Mo in US.  There are several sources for air variables NOS on the web INcluding ONe I saw in the US for less than $10. Contact me directly for details. What you could do is set yourself the target of getting a VFO going and if that fails go for a  built up transceiver and if you pass then you can buy either  of the above transceivers as a kit...with the OzQRP unit you already have an agricultural VFO going and you need only buy the base transmitter kit sans vfo.  Eventually you will get fed up with the analogue vfo and will buy the CVS and integrate that in  your box. The Farhan design shown needs to be rejigged to tune 2.8 to 3 Mhz so it produces 7 to 7.2 Mhz when subtracted from the IF frequency of 10 Mhz that Ozqrp use. If you treated your tecnician licence study seriously you can do those calcs. It really needs the coil rebuilt as a T50-6 toroid. You can most likely get one of those as a one off from Fred at Far circuits, or you can get it and a few other toroids and semis as a bunch from  the Toroid King in Florida.  The Farhan schematic has a few idiocies. Firstly there is a resistor with a missing value. Anything from 50 to 100 R will work . THere is an electrolytic wit no value , use 10uF and the tapping point on the coil is not show, use 1/3 turns up from the grounded end.  If you are to do any experimentation at all you will need a frequency counter and I have just heard of one that  as  bare unit sounds plausible. 6 digits  eg 14 020 1 Mhz ie down to the 100s of hertz resolution $ 13 USD. Obviously ex PRC.  It will be an extension of the Wolf Buscher design. ..almost for sure.  have a look at www.mpja.com.     site and good luck with what you try to do. Subs. BFW11 Unavailable . Use 2N xxxx I am dead tired and might muck up and lose this post so contract me direct for trans and FET subs if you are going lto built the VFO.

Re: Accidental Calibrate #ubitx #calibration

EI_Frank
 

My QTH is the east coast of Ireland, so will be very lucky to receive the 5, 10Mhz WWV transmissions, for Zero Beat calibration, given the propagation conditions lately.
I'll have to tune to a local AM broadcast channel.
Thanks for the suggestion anyway.

Re: ubitx and case for sale

Timothy Fidler
 

FET 2N4091 metal case JFET or equivalent. Must be metal case for freq stab.  Bipolars : MPSH 10 or better use  the  BSX-20 which has a FT of 500 Mhz and very low input capacitance c/w 2n2222.  and get rid of the silly 9v regulator chain use an LM 78L09 regulator chip or similar. TEF

Re: uBITX HF transceiver and blue MBITX metal case.

Sunil Sankaranarayanan
 

Eddie,
            Check this out(from Google)

How to Open and Extract RAR Files on macOS or Mac OSX ...

https://appletoolbox.com/2015/10/how-to-extract-rar-files-on-mac-osx/
7
Sunil Sankaranarayanan VU2MTM
 
 

Re: any tips for debugging RFI issue? #ubitx-help

 

Mike :

It certainly sounds like RF getting into where it doesn't belong.  End-fed wires are notorious for bringing RF into the shack.

I would suggest trying to put a ferrite choke on the power leads and keeping them as short as possible.
 
Any external wires (PTT, Mic, key, power, headphones) might be acting like an antenna and allowing
RF in where it isn't wanted. 

Is there any way that you can try a different coax fed antenna ? Maybe try the same configuration at a friends place where they 
have different antenna setup ?  That would at least allow you to rule out some internal issue in the radio.  If you can't reproduce the
issue elsewhere with a real antenna on it then it is likely something specific to your use of the end-fed wire and resulting RFI. 

Cheers

Michael VE3WMB 

Re: Ubitx will be here tomorrow. Any suggestions for a Bitx newbie #ubitx

W7PEA
 


Use the Groups wiki site... https://groups.io/g/BITX20/wiki/home  and make corrections and additions if you feel its needed. 

And what they said, build it vanilla first.

Enjoy, its a fun rig,
W7PEA | Patrick

Re: ND6T AGC and Click kit wiring notes

Kees T
 

Looks very nice Nick, good luck with it.

You might also label the "+" via on the 5V input since we had some confusion there, and the other grounds (audio, etc).

73 Kees K5BCQ

Re: RFI Problem related by routing audio through K3 (uBitx)?

Mark M
 

Printed Wiring Board,  a.k.a. circuit board.

click fix and squeal on transmit #ubitx

Ben AC1FG
 

Hi -- I have had my v3 ubitx working fine, and thought I would install the T/R click fix version 2 from http://www.nd6t.com/uBITX/TR%20Click%20Fix.htm. I'm fairly confident in the circuit I assembled, slightly less confident in the jumpers, trace-cutting, and attachment to the board. The click is still audible in the relay but not in headphones on either transition, and I get a loud squeal on transmit into a dummy load when the volume pot is more than slightly turned up. What should I be looking at to diagnose this?

I noticed continuity between the 12v line and the point marked Rx connection in this section after cutting the trace, which seemed odd:

Harmonic performance - SSB vs CW

Warren Allgyer <allgyer@...>
 

I am noting a significant difference in the harmonic suppression in SSB mode versus CW mode. 

The two signals are generated in a very different way. SSB is generated at 45 MHz and mixed down to the final transmit frequency by combining with the first oscillator in the balanced first mixer to make the SSB transmission. In CW the 45 MHz path is disabled and the first oscillator is simply moved to the transmit frequency. The first mixer is unbalanced with a DC bias to allow the first oscillator signal to leak through.

It appears the act of unbalancing this mixer produces harmonics, particularly high order odd harmonics that are clearly in excess of the -43 dBc requirement.

The screenshot shows  the harmonics of an 80 meter transmission at 10 watts. The purple trace is the CW and the blue trace is SSB. Signal source for SSB is a approximately -40 dBV 1 KHz tone with the level adjusted to match the CW carrier level. The SSB signal harmonic suppression is just adequate (green display line) however the CW signal is clearly non-compliant.

I am not sure what to do about it yet but wanted to raise the point. I have done a search on this board since I am new and I do not find this has been reported before..... perhaps I missed it?

WA8TOD