Date   
Re: noise

John Sharpe
 

Hi all, 

I found a simple fix for my receive noise. I used an antenna tuner!

Thanks for all the good suggestions from the group.

As well as changing my Bitx40 enclosure, I had changed my antenna. I went from a 40m dipole (with a balun and coax feeder) to a ZS6BKW with parallel feedline, a balun and coax into the Bitx40.

I presume the feeder picked up more noise and my Bitx40 front end was being swamped. I guess the MFJ-901b tuner has improved attentuation of the out-of-band signals.

Now receive is good and I’m getting about 4 watts out from 12v and 10w out from 20v (measured on a Daiwa CN-801HP).

73s

John, VK2VOL






On 8 Jul 2017, at 12:20 am, John Sharpe <johsharpe@...> wrote:

Hi all,

I moved my Bitx40 board to a smaller enclosure and somewhere along the line I ended up with massive breakthrough from AM stations.

This happened even with the VFO unplugged from the board.

The breakthrough stopped (surprisingly) when I grounded the centre contact of the antenna input. 7mhz  SSB signals came through fine!

I experimented with a couple of capacitors across the antenna input instead of the grounding, and finally used a 100pf capacitor.
Now the receive is great, no AM breakthrough at all and a reduction in noise. Signals still getting through fine.

Transmit seems ok (on a nearby receiver), but I haven’t tested power output.

I’m not sure how that all worked. I have Peter parker’s improved audio transmit mod. Also removed the 1uf capacitor between pins 1 and 8 of the LM386
and replaced with resistor/capacitor.

Any thoughts?

John

VK2VOL




Re: W8TEE TFT/ VFO DISPLAY BOARD BOARD

 

Dr. Jack, W8TEE, 

Thanks for the reply and clarifications.  

I have been reading and scouring thru each and every email as they pop up on this group and the soft group, its not like drinking from a firehose, more like a spillway gates are open, so many great directions and great minds to draw from.  

I had understood the other details you mention, already had both versions saved and ready to put to work, I just wasn’t sure you still had boards. I understand none of this is a kit, I built a couple of Heathkits back in the mid 80’s.  I explain all of this as being a platform to experiment with.  It will be a group buy, we meet twice this week, so I will get a good number for the buy.  

Keep on coding, I used to code on AS/400’s real near you….all over Cincinnati area…I thought that neuro domain was gone, Arduinos have opened up that world again, of me, in bite sized chunks that I can handle, no more 20k mainlines possible for me.  Having a lot of fun. Starting from scratch all over again. Books work real good for me, that’s why I have yours.  Since I don’t have short term memory worth anything, these online mazes are really tough.

I will be making an order by the end of the week.

Craig
KM4YEC


On Jul 9, 2017, at 11:23 PM, Jack Purdum via Groups.Io <econjack@...> wrote:

I'm selling the board for $7.50 pp. I have a bunch left as I think my club will do a build of it. I have uploaded a new assembly manual, schematic, and source code in the group's Files section. Since I just did it, sort the list by date and I should be close to the top. QRPGuys.com is selling the AA PCB board. It's not a kit...just the board. Note that both projects use the Mega 2560 Pro Mini. The one from Banggod will NOT work, as it's pins are off by 0.10". I use eBay #162264493523.

If you want a board, use PayPal and my account is econjack@.... Make sure you leave a shipping address. I can give you a better price if you order 10 or more.

Jack, W8TEE



From: Craig Thibodeaux <km4yec@...>
To: BITX20@groups.io 
Sent: Sunday, July 9, 2017 10:26 PM
Subject: Re: [BITX20] W8TEE TFT/ VFO DISPLAY BOARD BOARD

Dr. Jack, W8TEE, 

I have searched just about everywhere I can think, here, there and over there…

Are any of your boards available? Enough for a group buy? 

Are the details still what they were a month or more ago, because thats the last info I can find, and I can't make sense if you ran out or have more?

We are also looking at the upcoming AA, more than serious, we are using Arduino Projects for Ham Radio, probably going to go next to that ‘C’ book.

Our group has a dozen BitX’s either in hand or on order, and probably more real soon. 

I would love to be working with this, have to figure out how to get your board.

Craig
KM4YEC  ( @ ) g m a i l 


On Jul 9, 2017, at 10:02 PM, Jack Purdum via Groups.Io <econjack@...> wrote:

No, it should be changing without being connected to the main board. It sounds to me like the connections from the encoder to the PCB are on the wrong pins. CHeck those and make sure they are correct. You can download the latest schematic for the board from the Files section of the group.

Jack, W8TEE



From: Charlie Morrison <charlie@...>
To: BITX20@groups.io 
Sent: Sunday, July 9, 2017 4:42 PM
Subject: Re: [BITX20] W8TEE TFT/ VFO DISPLAY BOARD BOARD

Hi Jack

I have my board built and running with the latest code, however turning the rotary encoder does not move the frequency from 7.200 (I have tried 3 different encoders with same result).  Pressing the encoder switch moves it to SW1, but further presses do nothing. I have not connected the VFO to the BITX yet, i dont recall seeing a connection diagram anywhere, i must have missed it. Does the VFO need to be connected to the BITX for the frequency to change and the switch to behave properly?

73, Charlie GI4FUE



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Slight Inverted V light and easy

 

Thought I would share this one.

Used some cheap junk box spool of speaker wire, a banana connector and some plastic insulators with a case mount so-239.

 

 Originally my brother W8FI made one like this and called it a Luxembourg for the 1st qso he made with it. 

 

 Using the case divider on the banana post as a tension relief on the wire and added a length of para cord for the connector.

 

 The legs are just about 32 ft each as the dipole/Inverted V lengths are very close 31.6 and 32.6 so I figure a slight V or not 45 degrees would be safe to bet 32 is good.

 

Took it to the park the other day and worked W1AW for IARU HF Championship, if my cw copy was any better I'm sure I would have made more but test was complete.

 

Used a ZM-2 Tuner and a 12v APC battery.

 

 Happy building

73

 David

  N8DAH

 

 

Re: TFT VFO/BFO by VU2SPF

John Backo
 

These are very interesting projects all.

Take a look.

john
AD5YE

TFT VFO/BFO by VU2SPF

SP Bhatnagar
 

I have put the details of my TFT VFO + BFO on blog and github. It is a design where standard arduino Mega 2560 is used. The 2.4 inch TFT sits right on top and a specially designed board for Si5351 etc piggybacks on Mega next to TFT. All extra pins from Mega are brought out on this board on the back side, for ease of connection. These extra pins should be sufficient for controlling bands etc. It is a completely touch controlled version.

The Arduino sketch is working but pitfalls are expected. The basic manual detailing various touch buttons is on blogspot.

https://github.com/sprakashb/5351-with-Ardu-Mega
vu2spf.blogspot.in

Comments and suggestions are welcome.

73
SP Bhatnagar
VU2SPF

Re: BITX QSO Night, Sunday, July 9, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

John P
 

On Sun, Jul 9, 2017 at 06:08 pm, Nick wrote:
No luck for me with my mag loop and bitx, called on and off for about 20 minutes before the mosquitoes got ridiculous. I did hear w3ttt but that is about it. 
What Vince asked: How big? I'm just finishing up a 2 loop 4' one. Not sure how well it's going to perform on 40, but that's as big as I can get into the attic. Have to finish up the feed mechanism. I'm trying a gamma match, but if that doesn't work, I'll go with the more conventional coupling loop. Then I have to add a Arduino controlled mechanism for the tuning capacitor.
 
--
John - WA2FZW

Re: W8TEE TFT/ VFO DISPLAY BOARD BOARD

Jack Purdum <econjack@...>
 

I'm selling the board for $7.50 pp. I have a bunch left as I think my club will do a build of it. I have uploaded a new assembly manual, schematic, and source code in the group's Files section. Since I just did it, sort the list by date and I should be close to the top. QRPGuys.com is selling the AA PCB board. It's not a kit...just the board. Note that both projects use the Mega 2560 Pro Mini. The one from Banggod will NOT work, as it's pins are off by 0.10". I use eBay #162264493523.

If you want a board, use PayPal and my account is econjack@.... Make sure you leave a shipping address. I can give you a better price if you order 10 or more.

Jack, W8TEE



From: Craig Thibodeaux <km4yec@...>
To: BITX20@groups.io
Sent: Sunday, July 9, 2017 10:26 PM
Subject: Re: [BITX20] W8TEE TFT/ VFO DISPLAY BOARD BOARD

Dr. Jack, W8TEE, 

I have searched just about everywhere I can think, here, there and over there…

Are any of your boards available? Enough for a group buy? 

Are the details still what they were a month or more ago, because thats the last info I can find, and I can't make sense if you ran out or have more?

We are also looking at the upcoming AA, more than serious, we are using Arduino Projects for Ham Radio, probably going to go next to that ‘C’ book.

Our group has a dozen BitX’s either in hand or on order, and probably more real soon. 

I would love to be working with this, have to figure out how to get your board.

Craig
KM4YEC  ( @ ) g m a i l 


On Jul 9, 2017, at 10:02 PM, Jack Purdum via Groups.Io <econjack@...> wrote:

No, it should be changing without being connected to the main board. It sounds to me like the connections from the encoder to the PCB are on the wrong pins. CHeck those and make sure they are correct. You can download the latest schematic for the board from the Files section of the group.

Jack, W8TEE



From: Charlie Morrison <charlie@...>
To: BITX20@groups.io
Sent: Sunday, July 9, 2017 4:42 PM
Subject: Re: [BITX20] W8TEE TFT/ VFO DISPLAY BOARD BOARD

Hi Jack

I have my board built and running with the latest code, however turning the rotary encoder does not move the frequency from 7.200 (I have tried 3 different encoders with same result).  Pressing the encoder switch moves it to SW1, but further presses do nothing. I have not connected the VFO to the BITX yet, i dont recall seeing a connection diagram anywhere, i must have missed it. Does the VFO need to be connected to the BITX for the frequency to change and the switch to behave properly?

73, Charlie GI4FUE



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Re: BITX QSO Night, Sunday, July 9, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

Tom VE3THR
 

worked tonight on 7.277 @ 7 watts into OCFD Started at app. 0000 UTC 
KI4PSR Dave 55
KC1FSZ Bruce 56
WA1UQO Armand was 55 then QSB took him out
VE3RRD Al 59
VE3RDQ Jack 55
N1PMA  Craig 55

heard but couldn't work
KM4WII
KC9CEB
AD8J not qrp
W0BOY
K0GSG not qrp

Re: BITX QSO Night, Sunday, July 9, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

Al Duncan VE3RRD
 

Worked local stations VE3THR and VE3RDQ. Also worked
KC1FSZ
N1PMA
W0OIC
KD9CKB
Heard KM4WII and a couple more that I couldn't work. Not much QRN tonight for a change.

Re: BITX QSO Night, Sunday, July 9, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

Vince Vielhaber
 

I heard one person all nite. In fact all the Sundays I've tuned in it's the only one that was half way legible (I'm not a fan of his mic). The last 3 of his call were CGH and the beginning was K? or W? might have been 4. Like I said, I'm not a fan of his mic, took 10 times to make out the word Golf when he said his cal phonetically.

Did anyone else hear him? He was in North Carolina.

Vince.

On 07/09/2017 10:22 PM, KC8WBK via Groups.Io wrote:
QSO: N0GSG
Heard
W4JLE, SC
KE5HBL, CO
Lots of static.

Re: BITX QSO Night, Sunday, July 9, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

Jeff
 

Not the greatest conditions at my house but was able to work:

W4JLE 
W0BOY

Jeff
N9ARZ

Re: W8TEE TFT/ VFO DISPLAY BOARD BOARD

 

Dr. Jack, W8TEE, 

I have searched just about everywhere I can think, here, there and over there…

Are any of your boards available? Enough for a group buy? 

Are the details still what they were a month or more ago, because thats the last info I can find, and I can't make sense if you ran out or have more?

We are also looking at the upcoming AA, more than serious, we are using Arduino Projects for Ham Radio, probably going to go next to that ‘C’ book.

Our group has a dozen BitX’s either in hand or on order, and probably more real soon. 

I would love to be working with this, have to figure out how to get your board.

Craig
KM4YEC  ( @ ) g m a i l 


On Jul 9, 2017, at 10:02 PM, Jack Purdum via Groups.Io <econjack@...> wrote:

No, it should be changing without being connected to the main board. It sounds to me like the connections from the encoder to the PCB are on the wrong pins. CHeck those and make sure they are correct. You can download the latest schematic for the board from the Files section of the group.

Jack, W8TEE



From: Charlie Morrison <charlie@...>
To: BITX20@groups.io
Sent: Sunday, July 9, 2017 4:42 PM
Subject: Re: [BITX20] W8TEE TFT/ VFO DISPLAY BOARD BOARD

Hi Jack

I have my board built and running with the latest code, however turning the rotary encoder does not move the frequency from 7.200 (I have tried 3 different encoders with same result).  Pressing the encoder switch moves it to SW1, but further presses do nothing. I have not connected the VFO to the BITX yet, i dont recall seeing a connection diagram anywhere, i must have missed it. Does the VFO need to be connected to the BITX for the frequency to change and the switch to behave properly?

73, Charlie GI4FUE



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Re: BITX QSO Night, Sunday, July 9, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

KC8WBK
 

QSO: N0GSG
Heard
W4JLE, SC
KE5HBL, CO
Lots of static.

Re: Raduino v1.18 (improved CW performance) released

Keith VE7GDH
 

Dave KI4PSR wrote...

when I tried to simply compile/verify, I get an
error message about too many decimal points.
I don't know if it's the problem, but do you
have the Arduino Nano selected? Also, do you
have the Etherkit Si5351 library installed?

I don't have the BITX40 ready to go yet, but
I'm listening on 7277 KHz. I can hear a couple
of stations, but I haven't caught the call signs
yet.

--
73 Keith VE7GDH

Re: BITX QSO Night, Sunday, July 9, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

Dr Fred Hambrecht
 

I heard several stations. I worked K0GSG who was running 1500 watts. I tried to get him to call for bitx stations and act as a net control. In spite of telling me I was 5-9 I was never able to convey my request. I did get a good audio report which was welcome.

I hear  BITX stations in Boston, an 8 station who’s call I never fully copied and a station portable in Colorado.

Station here is running 13 watts to a G5RV at 70 feet.  Tonight I was running on an 18 Volt Mikita drill battery with a regulator for the 12 Volts.

I will try again at 10 PM EDST.

 

v/r

Fred W4JLE

Gilbert, SC

 

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Nick
Sent: Sunday, July 9, 2017 21:09
To: BITX20@groups.io
Subject: Re: [BITX20] BITX QSO Night, Sunday, July 9, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

 

No luck for me with my mag loop and bitx, called on and off for about 20 minutes before the mosquitoes got ridiculous. I did hear w3ttt but that is about it. 

Re: BITX QSO Night, Sunday, July 9, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

Bruce MacKinnon KC1FSZ
 

Pretty good condition this evening after the KW station below us cleared.  Logged the following QSOs:

VE3THR 
KC8WBK
VE3RRD
N8DAH
W4JLE

73s,
Bruce KC1FSZ

Re: BITX QSO Night, Sunday, July 9, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

 

KC8WBK heard you a few times, KM4YEC

Also heard W3TTT more, and best of the night

Heard KC1 at 8:00 pm EST on 7.277
Heard VE3HER at 8:10 pm EST 

Maybe? W2BA? at 7:31 pm ? 7.278?

Craig 
KM4YEC

I recut my inverted V and raised it about a month ago.  I was resonant out of band at 6.6xx and made multiple contact with W1LY on 3 different Sundays….since putting an MFJ on my antenna and ‘tuning’ it, have not made a contact, yet I took my BitX to a Field Day set up and another Ham made a out of state contact on it.  Looks like I need to play with it on more than Sundays.

On Jul 9, 2017, at 8:56 PM, KC8WBK via Groups.Io <cruisenewsnet@...> wrote:

QSos...
W3TTT
KC1FSZ
Partials or potential relays...
VE3THR
KM4?
N2DAH
W4.A?

Hearing lots of static.  Maybe things will improve later.

Re: W8TEE TFT/ VFO DISPLAY BOARD BOARD

Jack Purdum <econjack@...>
 

No, it should be changing without being connected to the main board. It sounds to me like the connections from the encoder to the PCB are on the wrong pins. CHeck those and make sure they are correct. You can download the latest schematic for the board from the Files section of the group.

Jack, W8TEE



From: Charlie Morrison <charlie@...>
To: BITX20@groups.io
Sent: Sunday, July 9, 2017 4:42 PM
Subject: Re: [BITX20] W8TEE TFT/ VFO DISPLAY BOARD BOARD

Hi Jack

I have my board built and running with the latest code, however turning the rotary encoder does not move the frequency from 7.200 (I have tried 3 different encoders with same result).  Pressing the encoder switch moves it to SW1, but further presses do nothing. I have not connected the VFO to the BITX yet, i dont recall seeing a connection diagram anywhere, i must have missed it. Does the VFO need to be connected to the BITX for the frequency to change and the switch to behave properly?

73, Charlie GI4FUE



Virus-free. www.avast.com

Re: BITX QSO Night, Sunday, July 9, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

Bruce MacKinnon KC1FSZ
 

Sounds great Dave, FB.  

73,
Bruce KC1FSZ

Re: BITX QSO Night, Sunday, July 9, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere

Vince Vielhaber
 

What diameter is your loop? Building one is on my todo list.

Vince.

On 07/09/2017 09:08 PM, Nick wrote:
No luck for me with my mag loop and bitx, called on and off for about 20
minutes before the mosquitoes got ridiculous. I did hear w3ttt but that
is about it.