Date   
Re: Drawn Raduino P1 P3 connections

ve7hcw@...
 

Hi Al
       You are correct that pin should be 12V.   i have corrected that mistake and post a new drawing.

   wayne VE7HCW

Re: Raduino with Rotary encoder

Jack Purdum <econjack@...>
 

Tell me exactly what you need, as I may already have it or can point you to it. "...it's connection to this..." is confusing to me and I'm not really sure what you need.

Jack, W8TEE



From: Dexter N Muir <dexy@...>
To: BITX20@groups.io
Sent: Monday, July 17, 2017 5:24 AM
Subject: Re: [BITX20] Raduino with Rotary encoder

Jack's two files tell how to connect the *Arduino Nano*, and that is good generic background info. The Nano, however, is linked to the Raduiono PCB for the BITX40 - it's connection to this that would be far more helpful for the newcomer (and for old duffers like me! :) ). Anyone dunnit already who could pass on the info? perhaps a diagram? I doubt it's essential to connect directly to the Nano. A variation on Farhan's wiring diagram/s would be Excellent.
Hopeful ...



Virus-free. www.avast.com

Re: Drawn Raduino P1 P3 connections

ve7hcw@...
 

Hi Al
     you are correct should be 12 volts on that pin .now I am having difficulty locating that Express PCB file to correct that mistake. will have to  search all the Express PCB files on this computer. getting old at this game , so busy when you retired at 69 !
      wayne      ve7hcw/ va7at

Re: BITX echolink node

tom van der meer
 

I'd definitely visit. Let me know when its up. 
73 to all

Re: Raduino / LCD display

Vince Vielhaber
 

Yeah, they're a pain in the backside to find. They currently have them
with PCBs.
https://www.taydaelectronics.com/pcb/pcb-support-hardware-materials.html
The ones I used are the 6.3mm
https://www.taydaelectronics.com/pcb/pcb-support-hardware-materials/hc-6-6mm-pcb-support-html.html

Vince.

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: W8TEE TFT/ VFO DISPLAY BOARD BOARD

Art Olson
 

Jack

Duh. What's your phrase?  I had a double flat forehead moment. Again thanks for you help and patience 

Art

Sent from my iPhone

On Jul 16, 2017, at 10:14 PM, Jack Purdum via Groups.Io <econjack@...> wrote:

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: On the subject of fake IRF510

 

Jerry,

The RD16HHF1 is designed for 12.5V, so running at higher voltage is guarantee magic smoke with projectiles!

They have 70 and 100W versions for HF @ 12.5 volts. Maybe worth experimenting!

Raj

At 16-07-2017, you 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.

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

Larry Smith
 

I only worked one station W1LY 59 (1955 DST) as always in there.  QSB bad news for my signal 33.  I could hear W1LY working stations I couldn't hear.

A long time friend/ham sent this to me:  

class G2 geomagnetic storm going on and all the bands are pretty much 'toast'.

I agree 40 was really not in there for me last night. gave up at 2025 with W1LY still in there!
73
Larry
WA9DOH 

On Thu, Jul 6, 2017 at 9:26 AM, KC8WBK via Groups.Io <cruisenewsnet@...> wrote:
BITX QSO Night, Sunday, July 16, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

Join us as we make contacts from BITX40 to BITX40 on 7.277 MHz in 40 meters!

To participate, call CQ BITX at 7pm sharp, your local time, on Sunday. Call off and on for about 15 minutes. It is helpful if you call CQ BITX with your name and location.  Repeat your call a number of times if conditions are weak.

This is a worldwide event at 7pm in each time zone.  You may participate in any time zone, regardless of your location, so you may wish to call in at 6pm, 7pm and 8pm, your local time, to contact hams in adjacent time zones.

The backup frequency in case of QSB or other noise is 7210 kHz.

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 at 7pm on Sunday.  Talk to you then!


Re: W8TEE Jack's VFO/TFT board Downunder

Gary Beech VK2KYP
 

Hi Bill can I get one of the pcb's
Thank you gary 
Vk2kyp

Sent from my iPhone
Regards Gary 

On 17 Jul 2017, at 19:00, William R Maxwell <wrmaxwell@...> wrote:

As of today, I have 3 of Jack's VFO/TFT boards remaining available for distribution to builders in VK or ZL. I can supply 1 anywhere in VK for $15.60, including pack and post, or 2 for $27.90. Price for ZL is $18.95 AUD or $31.25 AUD for 2, again with pack and post included.

Of the 12 distributed thus far, 2 stayed with me for personal use in VK7, 2 went to VK6, 4 went to VK2 and 4 to ZL.

73

Bill, VK1MX & VK7MX

Re: BITX40 Sensitivity

César EA3IAV
 

Would do work to attenuate the signal? I think that the oscilloscope will read the uv injected

This Zetagi RP2 compact in-line attenuator reduces power output of transceivers in cases of TVI interference, for example: a two level attenuator reduces power by 25% or 50%.

Power reducer for use on CB frequency (26-30Mhz). Allows you to reduce the power by half or a quarter. Ideal for reducing the power of radios when attaching to amplifiers.

Main Features

  • Max input SSB: 50W
  • Max input FM: 25W
  • Size: 85mm x 60mm x 35mm

Re: Raduino with Rotary encoder

Dexter N Muir
 

Jack's two files tell how to connect the *Arduino Nano*, and that is good generic background info. The Nano, however, is linked to the Raduiono PCB for the BITX40 - it's connection to this that would be far more helpful for the newcomer (and for old duffers like me! :) ). Anyone dunnit already who could pass on the info? perhaps a diagram? I doubt it's essential to connect directly to the Nano. A variation on Farhan's wiring diagram/s would be Excellent.
Hopeful ...

W8TEE Jack's VFO/TFT board Downunder

William R Maxwell
 

As of today, I have 3 of Jack's VFO/TFT boards remaining available for distribution to builders in VK or ZL. I can supply 1 anywhere in VK for $15.60, including pack and post, or 2 for $27.90. Price for ZL is $18.95 AUD or $31.25 AUD for 2, again with pack and post included.

Of the 12 distributed thus far, 2 stayed with me for personal use in VK7, 2 went to VK6, 4 went to VK2 and 4 to ZL.

73

Bill, VK1MX & VK7MX

Re: tune for maximum brightness

Richard Andrew Knack
 

Some of the current Chinese copies of the "Miracle Whip" antenna (which the tuner in the video strongly resembles, by the way) have this feature built in.

Rich
KC8MWG



On Sunday, July 16, 2017, 11:47:53 PM EDT, Arv Evans <arvid.evans@...> wrote:


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

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

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: 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: 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?


tune for maximum brightness

Arv Evans
 

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