Date   
Re: BITX QSO Night, Sunday, July 16, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

JuanCarlos
 

I I have copied W1LY  s = 5-5     7:10 PM  EST
Cape Coral, Fl
WJ6C



Qrv's, 73's

Mr.Juan Carlos Berberena Glez BSc.
WJ6C ex/CO6BG


“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.” 

2017-07-16 20:26 GMT-04:00 Ion Petroianu <ion.petroianu@...>:

Nothing at all Tom. I could hear Willy talking to you and heard him saying your call sign, but nothing from you. too close. Can you hear me at all?
--
Ion

VA3NOI


Re: BITX QSO Night, Sunday, July 16, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

Tom VE3THR
 

nada nada .. probably better luck on 2M simplex being this close. I reconfigured my ocfd for nvis but still nothing. Need a 40m nvis i guess. Perhaps during the day ??? better local prop.

Re: BITX QSO Night, Sunday, July 16, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

Tom VE3THR
 

Mr.Juan Carlos Berberena Glez BSc.
WJ6C ex/CO6BG

Hi Juan...I'm hearing you up in Ontario Canada about 4x4 at times. Can't hr W1LY at all anymore. Keep looking north!!!
73 Tom

Re: BITX QSO Night, Sunday, July 16, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

KC8WBK
 

I heard WJ6C in MI at 5x5

Re: BITX QSO Night, Sunday, July 16, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

 

I had Wj6C but I guess he couldn't hear me well.

 

 I will move down to 7.274 again seems like a few on .277

N8DAH

Andrew Krause
 

Copy 2x3 out of Atlanta, GA. Band is up and down. 
--

Andrew Krause
General Class Amateur Radio License: KM4ZJO
andrew.krause@...
(404) 732-2369



Re: BITX QSO Night, Sunday, July 16, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

Ryan Flowers
 

I'll be calling on 7.277 at 7pm PDT from my QTH in Elma WA. Should be good for CA, NV, ID, MO coverage, maybe UT.  
--
Ryan Flowers W7RLF

 

miscdotgeek.com

http://miscdotgeek.com/unofficial-bitx40-faq

http://miscdotgeek.com/bitx40-digital-jt65/ <-- Learn how to go digital on the BITX40

Re: BITX QSO Night, Sunday, July 16, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

Tom VE3THR
 

well I'm def from all the static crashes tonight! Managed to work KI4PSR TN, W4JLE SC, KC1FSZ MA, W1LY RI, W4DML TN. Heard but couldn't confirm wj6c FL and w0oic IA. Calling it quits 0122 UTC ... next mod is an AGC !!!
73

Re: BITX QSO Night, Sunday, July 16, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

 

Made 5 QSO's all bitx to bitx. Lots of fun hope to work more, anyone else?

 

 

Re: N8DAH

 

Thanks for the report nice to know how its doing. Been tweaking for about a week I think its finished now.

  73
   David
    N8DAH




From: BITX20@groups.io <BITX20@groups.io> on behalf of Andrew Krause <andrew.krause@...>
Sent: Sunday, July 16, 2017 8:56 PM
To: BITX20@groups.io
Subject: [BITX20] N8DAH
 
Copy 2x3 out of Atlanta, GA. Band is up and down. 
--

Andrew Krause
General Class Amateur Radio License: KM4ZJO
andrew.krause@...
(404) 732-2369



Re: W8TEE TFT/ VFO DISPLAY BOARD BOARD

Jack Purdum <econjack@...>
 

No, that's not what's needed. If you want to read the voltage, you need to pass your supply voltage through a dropping resistor so the voltage doesn't exceed 5V. The end of that resistor is then connected to MYVOLTAGEPIN (A14). The code starting at line 1515 is the block that is responsible for reading that voltage and displaying it on the screen. The Mega should NOT be reading 12V directly on an analog pin. As I said before, this is explain in Rel. 2 of the manual, posted on the group site.

Jack, W8TEE


From: Art Olson <olson339@...>
To: BITX20@groups.io
Sent: Sunday, July 16, 2017 4:50 PM
Subject: Re: [BITX20] W8TEE TFT/ VFO DISPLAY BOARD BOARD

Jack
 
Yes the power pins for the tft/vfo are connected to my supply
 
art
 
From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Jack Purdum via Groups.Io
Sent: Sunday, July 16, 2017 4:37 PM
To: BITX20@groups.io
Subject: Re: [BITX20] W8TEE TFT/ VFO DISPLAY BOARD BOARD
 
did you connect a line to the voltage pin from your supply?
 
Jack, W8TEE
 

From: Art Olson <olson339@...>
To: BITX20@groups.io
Sent: Sunday, July 16, 2017 4:22 PM
Subject: Re: [BITX20] W8TEE TFT/ VFO DISPLAY BOARD BOARD
 
Jack
 
So after calculating mydividerconstant and recompiling the voltage still floats from 12.2 down to 2.3-2.7. So for now I just commented it out. However it would be great if I can get it to work correctly. Any thoughts
 
Display voltage from my supply (has a digital readout) 12.0v
Voltage at tp3 – 11.6v
 
art
 
 
From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Jack Purdum via Groups.Io
Sent: Sunday, July 16, 2017 11:06 AM
To: BITX20@groups.io
Subject: Re: [BITX20] W8TEE TFT/ VFO DISPLAY BOARD BOARD
 
Hey, Art...not a problem. The file's only been there a day or two and it will take a while to know it's available. No doubt I'll be posting new versions later on. BTW, my TFT/VFO PCB doesn't have to be used to replace the VFO. It's also a good way to experiment with the Mega 2560 Pro Mini since all of the pins are brought out to header pins, making it easy to attach things for testing. Indeed, you could leave off the support components and use it "stand-alone". I've tried to price it reasonably to encourage you people to experiment with it, to all of our benefit.
 
Jack, W8TEE
 

From: Art Olson <olson339@...>
To: BITX20@groups.io
Sent: Sunday, July 16, 2017 6:56 AM
Subject: Re: [BITX20] W8TEE TFT/ VFO DISPLAY BOARD BOARD
 
Jack
Thanks. Feel a bit foolish for missing the info in the manual
 
Art

Sent from my iPhone

On Jul 15, 2017, at 10:37 PM, Jack Purdum via Groups.Io <econjack@...> wrote:
Art:
 
I'm sure the flicker is because the voltage pin is floating. The code is written so the display updates every 2 seconds, but only if there is a "real" swing in the voltage. You can see the code in loop(), around line 1515. The way to get this to work on the display is explained in the B40 Assembly Manual (Rev. 2) that is in the Files section. Look for "Determining the Displayed Voltage". If you don't want the voltage display activated, just comment out the code block that starts at 1515.
 
Al Peter helped me fix the "encoder noise" is was hearing. Turns out it was a flat forehead mistake on my part. In the process of separating the PA power source from the TFT power source, I managed to introduce a ground loop. Once that was determined it was fairly easy to fix.
 
I'm back onto the other features I want to add.
 
Jack, W8TEE
 

From: Art Olson via Groups.Io <olsonaj6927@...>
To: BITX20@groups.io
Sent: Saturday, July 15, 2017 5:11 PM
Subject: Re: [BITX20] W8TEE TFT/ VFO DISPLAY BOARD BOARD
 
Jack

I must have missed this in the build or setup. The voltage continues to change so it must be floating. I have the tft/vfo connected to the bitx40 power so don't think I have a ground problem. Could you resend the detail about the voltage divider 

"If you connect the display voltage pin to your voltage source, it will flash one or two times at power up, but will only update itself if there is a measurable change in the supply voltage. My guess is that you don't have yours tied to either ground or a voltage divider. As a result, the pin is floating which is read as a new voltage which triggers a screen update.I had mine running several hours last night and it never varied enough to update the field". 

art
 
 
 
Virus-free. www.avast.com
 


Re: BITX QSO Night, Sunday, July 16, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

Ryan Flowers
 

Called CQ on 7277 and 7210, no responses. Will try again next week, and promote this on the facebook group too :) 
--
Ryan Flowers W7RLF

 

miscdotgeek.com

http://miscdotgeek.com/unofficial-bitx40-faq

http://miscdotgeek.com/bitx40-digital-jt65/ <-- Learn how to go digital on the BITX40

Re: Raduino / LCD display

Dexter N Muir
 

On Sun, Jul 16, 2017 at 05:18 pm, Jerry Gaffke wrote:
The jury in jury-rigged doesn't involve a panel of one's peers, ...
I still prefer my nautical derivation: a jury in those days was likely not of one's peers but of Peers - nobles, or at least superiors, with notions of the requirements of 'rigging' a ship totally absent or out-of-date respectively.
Jerry-rigged from 1959? 'Jerry' at that time was likely the derogatory term for German, Allies having won WWII (likely also WWI, but not becoming colloquial until post WWII).

Re: Raduino / LCD display

Jerry Gaffke
 

Prefer and guess all you wish, but we have a written record of how most of this evolved.   Jerry-built predates WWII by almost 100 years, though I'm sure the wars helped give jerry-rigged a special resonance,  And if I were to hazard a guess (no citations, my apologies) most jory sailes got rigged without any Peers loitering about kibitzing.  Just piers.   OK, I'll try my best shut up now.  Carry on.

Jerry


On Sun, Jul 16, 2017 at 07:27 pm, Dexter N Muir wrote:
I still prefer my nautical derivation

tune for maximum brightness

Arv Evans
 

Re: BITX echolink node

David Woodward
 

I had to grin at some of the responses to my post.  My intention was to make troubleshooting, and schedule coordination more convenient for Bitx users. Also to have a forum for us to chat real-time.
 Being that a ham took the initiative to go ahead and start a chat room for us, this matter is now closed.
     Respect yourself
        KF4WBJ 

On Jul 15, 2017 5:56 PM, "David Woodward" <kf4wbj2@...> wrote:
While this is a great group with many capable people, it is way too slow in response time.
 Wouldn't an echolink node strictly for bitx related things be more convenient? 
 What are your thoughts?


Re: On the subject of fake IRF510

Mvs Sarma <mvs_sarma@...>
 

Jerry,
 You also need to check the possibility of getting a genuine RD16HHF1.
 while selecting RD device,  I recollect some one using RD16(15)HVF1 and their feeling was it improves gain at 21 and 28MHz, though the device is not meant for HF.

All the best
sarma
 vu3zmv


On Sunday, 16 July 2017 11:42 PM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:


I considered moving from the IRF510 to the RD16HHF1.
In a TO-220, better heat dissipation, tab is tied to source pin.
Designed specifically for RF service at Bitx40 power levels.
Only 10x the price of an IRF510.

However:
Pins are swapped around a bit from the IRF510, though that's easy enough to accommodate.
Vds max of 50v, vs 100v for the IRF510.
Threshold voltage might be higher than the IRF510, though probably within range for the Bitx40's RV1.

The low Vds max means it's not a good idea to feed an RD16HHF1 PA  with
more than 12v, whereas the IRF510 does well at 24v.
If I need better than the Bitx40's single IRF510,
will go to a push-pull IRF510 pair like the uBitx or WA2EBY amp.
Beyond that, multiple IRF510's in parallel on each leg of a push-pull amp as Allison is doing.

If swapping in random NFET's for the IRF510, you need to look hard at Vds-max and Vth.
Also the inter-electrode capacitances, this is typically what prevents the use of other switching FET's
meant for use at sub-MHz frequencies, our 2n2219a driver stage simply can't deal with the low impedance load
it sees at RF.  The IRF510 has an unusually low Qg (the total gate charge).

The IRF510 works fine if it has enough heatsink to keep it cool.
Maybe invest a few pennies in TO-220 insulators and heat paste.
Ideal for experimenters, cheap enough to have a dozen of them on hand in case you have a learning experience.

But as this thread has shown, buy from a reputable distributor, avoid those awesome deals on ebay.
Hard to imagine why anybody bothers to counterfeit the IRF510, as it's under $0.50 in quantity. 

Jerry, KE7ER



On Sat, Jul 15, 2017 at 03:25 pm, Andrew Krause wrote:
Is there an alternative in a TO-220 package? 
 
. . .


Re: Raduino / LCD display

Guy N7BIR <sgbridge@...>
 

Vince, do you have a link to Tayda for those self stick standoffs? I did a search on their website that came up with no results. Thanks.

73, Guy N7BIR

Re: Raduino / LCD display

JP JO
 

Guy,
Search pcb support. That'll show all

Use ICEBURG before 6PM East Coast on July 18th for 15% off



Sent by me

On Jul 16, 2017, at 11:12 PM, Guy N7BIR <sgbridge@...> wrote:

Vince, do you have a link to Tayda for those self stick standoffs? I did a search on their website that came up with no results. Thanks.

73, Guy N7BIR

Re: Raduino / LCD display

Dr Fred Hambrecht
 

https://www.taydaelectronics.com/catalogsearch/result/?q=A-2940

 

Here is one I use, they have other sizes as well.

 

v/r

Fred W4JLE

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Guy N7BIR
Sent: Monday, July 17, 2017 01:13
To: BITX20@groups.io
Subject: Re: [BITX20] Raduino / LCD display

 

Vince, do you have a link to Tayda for those self stick standoffs? I did a search on their website that came up with no results. Thanks.

73, Guy N7BIR