Date   
uBitx CM2KMK PCB performance in a South Africa pileup...

JuanCarlos
 

Re: uBitx CM2KMK PCB performance in a South Africa pileup...

Ashhar Farhan
 

fabulous job! Is he here on the list?

- f

Re: uBitx CM2KMK PCB performance in a South Africa pileup...

JuanCarlos
 

Who?
Heriberto or Tony?

“If you have a penny and I have a penny and we exchange pennies, you still have one cent and I still have one cent.  But if you have an idea and I have an idea and we exchange ideas, you now have two ideas and I now have two ideas.” 

Mr. Juan Carlos Berberena Gonzalez, BSc.
WJ6C exCO6BG 


2017-10-08 13:34 GMT-04:00 Ashhar Farhan <farhanbox@...>:

fabulous job! Is he here on the list?

- f


Re: uBitx CM2KMK PCB performance in a South Africa pileup...

Ashhar Farhan
 

LZ1DPN, is he here?

- f

On Sun, Oct 8, 2017 at 11:05 PM, Juan Carlos Berberena Glez <cubanqrp@...> wrote:
Who?
Heriberto or Tony?

“If you have a penny and I have a penny and we exchange pennies, you still have one cent and I still have one cent.  But if you have an idea and I have an idea and we exchange ideas, you now have two ideas and I now have two ideas.” 

Mr. Juan Carlos Berberena Gonzalez, BSc.
WJ6C exCO6BG 


2017-10-08 13:34 GMT-04:00 Ashhar Farhan <farhanbox@...>:
fabulous job! Is he here on the list?

- f



Re: Use of BitX40 for WSJT-X

greggaston@...
 

Yes.  I bought mine specially for working JT65. 
I have made many contacts using that mode. 

A couple of notes:
  • JT65 runs on USB even on 40 meters - so you need  to use a version of the Raduino software that supports changing sidebands.  A pushbutton has to be added to swap
  • I made a small circuit board with 2  600/600/ ohm cheap audio transformers to isolate the receive and transmit lines from the computer
  • I also added a VOX circuit on this board - the transmitter is keyed when the software starts sending tones.
  • I limit my output to 2 Watts and have made no changes to the cooling of the BITX final transistor 
73s
Greg 
KD4VV

Re: Use of BitX40 for WSJT-X

tsalmon534@...
 

Thanks to all who have replied to my quesiton. I'd like to eventually convert the BitX40 to a BitX20 and do JT on that band. Ted

Re: uBitx CM2KMK PCB performance in a South Africa pileup...

Keith VE7GDH
 

Ashhar VU2ESE wrote...

LZ1DPN, is he here?
Dimitar LZ1DPN has posted a number of times over
the last few months from lz1dpn (a) yahoo.com.
See also... https://qrz.com/db/LZ1DPN

--
73 Keith VE7GDH

Re: Solid state relay board

Noel
 

There are available DC switching solid state relays
http://www.ebay.com/itm/SSR-25DD-monofase-solido-Modulo-rele-a-stato-25A-DC-5-60V-J3M6-/252821967515?hash=item3add5d129b:g:ESwAAOSwuxFYz6lR
for example.  They employ a different circuit topology so a zero voltage crossing is not required to "release" the solid state relay
Many have the letters DD in their product code,
Be aware of electrical noise, and consider the option of PIN diode switching.  Google is your friend.
Don't dismiss the humble mechanical relay - they have their place
http://www.ebay.com/itm/DC5V-244-D005-02CS-Relay-Miniature-8-pin-2NO-2NC-Power-Relays-PCB-Mount-hot-/381572831272?hash=item58d7835828:g:YB8AAOSwYlJW6kbK

Food for thought....  Hall effect transistor as a switch, or even an opto isolator as a switch.
So many ideas out there so be creative, solder some stuff together (or use a breadboard) & let some smoke out!!!
--
73 de Noel, ZL1NC

Re: Solid state relay board

Noel
 

Re: Solid state relay board

Jerry Gaffke
 

Using a solid state relay designed to turn on lighting and motors and such won't work at 7mhz,
orders of magnitude too much capacitive loading.  
I doubt they bother to spec them sufficiently to figure out if it will even pass audio unmolested.


On Sun, Oct 8, 2017 at 01:17 pm, Noel wrote:
There are available DC switching solid state relays

Re: Amplified Microphone and the BITX40

Jim Keller
 

Well things didn't work out like I had hoped.   Recorded my BITx40 transmit audio on my Icom Pro III.   Compared the electret that came with the kit against the amplified microphone with blocking capacitor (1 uf tantalum).  The audio and signal using the electret was a bit higher than the amplified mic.  The electret sounds mushy so I will be looking for ways to improve the audio.  I have a number of speaker mics here for various VHF/UHF radios and my try some of those to get better results.

Jim

Re: Solid state relay board

Jerry Gaffke
 

Also, keep in mind that our relays must pass signals that go above and below DC ground.
On the Bitx40, that includes stuff going out to the antenna, to the speaker, or at the volume control pot.
 


On Sun, Oct 8, 2017 at 01:44 pm, Jerry Gaffke wrote:
Using a solid state relay designed to turn on lighting and motors and such won't work at 7mhz,
orders of magnitude too much capacitive loading.  
I doubt they bother to spec them sufficiently to figure out if it will even pass audio unmolested.

Re: BITX QSO Night, Sunday, October 8, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

John P
 

There's a net operating on 7.277 as of 6:35 EDT. May I suggest 7.282 as an alternate. Seems clear right now.
--
John - WA2FZW

Re: Use of BitX40 for WSJT-X

 

I have the bitX40 to build, can u link me to that post for the c91 c92 modification?
--
AncelB, MIT EE6002

Re: BITX QSO Night, Sunday, October 8, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

John P
 

7.277 still busy. I'm on 7.282.
--
John - WA2FZW

Re: BITX QSO Night, Sunday, October 8, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

Tom VE3THR
 

Can hear you calling cq John. Im up in Sudbury running portable. Calling you

Re: BITX QSO Night, Sunday, October 8, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

John P
 

I can just barely hear you every now and then

--
John - WA2FZW

Re: BITX QSO Night, Sunday, October 8, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

Tom VE3THR
 

Tnx 3x4 John. Not hearing anyone else. Getting qrm from a trsin in my motherinlaws back yard . Go figure...electric diesel engines!

Re: BITX QSO Night, Sunday, October 8, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

John P
 

You're welcome! I'm not hearing anyone else either. Probably nobody else got my frequency change message. Net seems to be gone from 7.277, but now had broadcast QRM on it.
--
John - WA2FZW

raduino v1.25 with Capacitive Touch Keyer released

Allard PE1NWL
 


Hi,
I've just released raduino v1.25, download it from https://github.com/amunters/bitx40

New in this release:

A minimal modification (add four resistors) is required for this functionality:
https://github.com/amunters/bitx40/blob/master/capacitive%20touch%20keyer%20modification.png

Further details are included in the updated operating instructions at
https://github.com/amunters/bitx40/blob/master/operating%20instructions

Happy BitX-ing!

73 Allard PE1NWL