Date   

Slop Bucket 20 BFO adjustment

Michael Maiorana
 

Hello all.
I finally got a chance to finish my 20 meter Slop Bucket today (SN #21). Haven't checked the transmit yet but I've been playing with the receiver. I calibrated with a frequency counter (CAL-A) without any issue. Even though the band is weak I was able to copy a few QSOs while tuning around the band. It hears well under -100 dBm from my HP signal generator. 

I wanted to try and adjust the BFO to see if I could improve the sound of the SSB audio. I went to that cal function (bF0), but as soon as I turn the encoder even one click, the signal I was listening to disappears. I powered off without saving and the radio came back up and was receiving signals again.

I put the frequency counter on TP1 and TP2 before I started the bfo adjustment and had 9.000920 MHz on TP1 and 23.160940 MHz on TP2. One click of the encoder and they go to 9.000920 MHz on TP1 and  9.000900 on TP2. Strangely, when I adjust the encoder, the frequency on TP2 changes. I have no idea why the LO would switch from 23 MHz to 9 MHz during the bfo adjustment.

I thought that maybe something was going on with the analog switch, but looking at the test points with a scope showed nice square waves, so my frequency counter wasn't being fooled. Could it be soldering of the Si5351? I would think that it wouldn't work at all if that was messed up.

This was a fun kit to build. Surface isn't as hard as it looks.

Anyway, if anyone has some advice I'm all ears.
Thanks
Mike M.
KU4QO


Re: Slop Bucket 20 BFO adjustment

Steven Weber
 

 

That would be a firmware problem, must of mistakenly made the program load the LO oscillator instead of the BFO one.

 

Will have to look into that.

 

Steve KD1JV

 

 

I thought that maybe something was going on with the analog switch, but looking at the test points with a scope showed nice square waves, so my frequency counter wasn't being fooled. Could it be soldering of the Si5351? I would think that it wouldn't work at all if that was messed up.

 

This was a fun kit to build. Surface isn't as hard as it looks.

 

Anyway, if anyone has some advice I'm all ears.

Thanks

Mike M.

KU4QO

 


Re: Slop Bucket 20 BFO adjustment

Michael Maiorana
 

Thanks for the reply Steve. I think I found the issue. 
In the ADJ_UP_B and ADJ_DOWN_B subroutines it calls this:

si5351bx_setfreq(0,SSB_BFO);

It looks like that should be a 1 instead of a 0 to set the BFO. I'll pull out the Arduino stuff today and make the change to see if that fixes it.
I'll let you know.

Thanks again for a really cool kit. Doing the surface mount stuff was fairly easy using a magnifier. Plus, no leads to trim after you solder!

Regards
Mike M.
KU4QO


On Sat, Nov 17, 2018 at 12:20 AM Steven Weber <steve.kd1jv@...> wrote:

 

That would be a firmware problem, must of mistakenly made the program load the LO oscillator instead of the BFO one.

 

Will have to look into that.

 

Steve KD1JV

 

 

I thought that maybe something was going on with the analog switch, but looking at the test points with a scope showed nice square waves, so my frequency counter wasn't being fooled. Could it be soldering of the Si5351? I would think that it wouldn't work at all if that was messed up.

 

This was a fun kit to build. Surface isn't as hard as it looks.

 

Anyway, if anyone has some advice I'm all ears.

Thanks

Mike M.

KU4QO

 


Re: Slop Bucket 20 BFO adjustment

Michael Maiorana
 

Yep, that fixed it. Here is the change:

 void ADJ_UP_B(){
          EncoderFlag =0;
          SSB_BFO = SSB_BFO + 10;
          si5351bx_setfreq(1,SSB_BFO);
                   }
    
    void ADJ_DWN_B () {
          EncoderFlag = 0;  
          SSB_BFO = SSB_BFO - 10;
          si5351bx_setfreq(1,SSB_BFO);

Works fantastic now!
Thanks again Steve.
Mike M.
KU4QO

On Sat, Nov 17, 2018 at 6:40 AM Michael Maiorana <zfreak@...> wrote:
Thanks for the reply Steve. I think I found the issue. 
In the ADJ_UP_B and ADJ_DOWN_B subroutines it calls this:

si5351bx_setfreq(0,SSB_BFO);

It looks like that should be a 1 instead of a 0 to set the BFO. I'll pull out the Arduino stuff today and make the change to see if that fixes it.
I'll let you know.

Thanks again for a really cool kit. Doing the surface mount stuff was fairly easy using a magnifier. Plus, no leads to trim after you solder!

Regards
Mike M.
KU4QO

On Sat, Nov 17, 2018 at 12:20 AM Steven Weber <steve.kd1jv@...> wrote:

 

That would be a firmware problem, must of mistakenly made the program load the LO oscillator instead of the BFO one.

 

Will have to look into that.

 

Steve KD1JV

 

 

I thought that maybe something was going on with the analog switch, but looking at the test points with a scope showed nice square waves, so my frequency counter wasn't being fooled. Could it be soldering of the Si5351? I would think that it wouldn't work at all if that was messed up.

 

This was a fun kit to build. Surface isn't as hard as it looks.

 

Anyway, if anyone has some advice I'm all ears.

Thanks

Mike M.

KU4QO

 


Speaking of the Slop Bucket..

Steven Weber
 

Since I can never leave well enough alone, I've started on a new layout/form factor for the Slop Bucket board. 

I'm making the display/processor/Si5351 a separate board which can either be mounted above the main board or mounted at a right angle to it. This would also allow me to sell just the board as a generic VFO. 

Mounted above the main board, the foot print is reduced to 3.6" x 3" x 1", which is darn close to being able to fit into an Altoids tin! Unfortunately, I don't think I can quite make it that small. 

I'm also trying to make the VOX circuit more sensitive. Has anyone tried their SB with digital modes yet? 

I'll order some prototype boards for this new form factor next week and see how it goes. 

73, Steve KD1JV 


Re: Speaking of the Slop Bucket..

Peter Young
 

Just tell me where to send my money.

-kf6goo

On Sat, Nov 17, 2018 at 7:35 PM Steven Weber <steve.kd1jv@...> wrote:
Since I can never leave well enough alone, I've started on a new layout/form factor for the Slop Bucket board. 

I'm making the display/processor/Si5351 a separate board which can either be mounted above the main board or mounted at a right angle to it. This would also allow me to sell just the board as a generic VFO. 

Mounted above the main board, the foot print is reduced to 3.6" x 3" x 1", which is darn close to being able to fit into an Altoids tin! Unfortunately, I don't think I can quite make it that small. 

I'm also trying to make the VOX circuit more sensitive. Has anyone tried their SB with digital modes yet? 

I'll order some prototype boards for this new form factor next week and see how it goes. 

73, Steve KD1JV 


Re: Speaking of the Slop Bucket..

Karl Heinz Kremer - K5KHK
 

Need any beta testers? ;)

Karl Heinz - K5KHK


Re: Speaking of the Slop Bucket..

 

Wow Steve, this sounds great. Any chance you could incorporate a LCD display this time? Lower power consumption is top priority to me and many others.

Joel 
N6ALT

On Nov 17, 2018, at 4:35 PM, Steven Weber <steve.kd1jv@...> wrote:

Since I can never leave well enough alone, I've started on a new layout/form factor for the Slop Bucket board. 

I'm making the display/processor/Si5351 a separate board which can either be mounted above the main board or mounted at a right angle to it. This would also allow me to sell just the board as a generic VFO. 

Mounted above the main board, the foot print is reduced to 3.6" x 3" x 1", which is darn close to being able to fit into an Altoids tin! Unfortunately, I don't think I can quite make it that small. 

I'm also trying to make the VOX circuit more sensitive. Has anyone tried their SB with digital modes yet? 

I'll order some prototype boards for this new form factor next week and see how it goes. 

73, Steve KD1JV 


Re: Speaking of the Slop Bucket..

Michael Maiorana
 

Mine draws only 49 mA on receive. That's pretty good if you ask me. I wonder how much of that is the display?
An LCD might be easier to read in bright light though. Maybe a little more fragile too?

I got some good compliments on the air today using the makeshift microphone from my uBitx, built into a plastic pen cap. :)

Mike M.
KU4QO

On Sat, Nov 17, 2018 at 9:10 PM Joel Caulkins/N6ALT <caulktel@...> wrote:
Wow Steve, this sounds great. Any chance you could incorporate a LCD display this time? Lower power consumption is top priority to me and many others.

Joel 
N6ALT

On Nov 17, 2018, at 4:35 PM, Steven Weber <steve.kd1jv@...> wrote:

Since I can never leave well enough alone, I've started on a new layout/form factor for the Slop Bucket board. 

I'm making the display/processor/Si5351 a separate board which can either be mounted above the main board or mounted at a right angle to it. This would also allow me to sell just the board as a generic VFO. 

Mounted above the main board, the foot print is reduced to 3.6" x 3" x 1", which is darn close to being able to fit into an Altoids tin! Unfortunately, I don't think I can quite make it that small. 

I'm also trying to make the VOX circuit more sensitive. Has anyone tried their SB with digital modes yet? 

I'll order some prototype boards for this new form factor next week and see how it goes. 

73, Steve KD1JV 


Re: Speaking of the Slop Bucket..

Steven Weber
 

 

 

 

Using a LCD creates a few issues, mostly size and cost. I’d rather not go that route for this. We can always blank the LED display when not in use to save a few ma if that’s an issue.

 

Steve KD1JV

 

Wow Steve, this sounds great. Any chance you could incorporate a LCD display this time? Lower power consumption is top priority to me and many others.

Joel 

N6ALT

 

We

 


Re: Speaking of the Slop Bucket..

 

Hi Steve, thanks for the reply. I should have mentioned the visibility factor in bright light also plays into my request for a LCD display. However you decide to do it, I will be happy.

Joel 
N6ALT

On Nov 18, 2018, at 9:50 AM, Steven Weber <steve.kd1jv@...> wrote:

 

 

 

Using a LCD creates a few issues, mostly size and cost. I’d rather not go that route for this. We can always blank the LED display when not in use to save a few ma if that’s an issue.

 

Steve KD1JV

 

Wow Steve, this sounds great. Any chance you could incorporate a LCD display this time? Lower power consumption is top priority to me and many others.

Joel 

N6ALT

 

We

 


Re: Speaking of the Slop Bucket..

Steven Weber
 

Yes, the daylight readability is something to consider. Also more info can be displayed on a 2X16 display. But a common 2X16  module is huge compared to the rest of the rig. It’s nearly 50% of the size of the main board.  Well, I’ll have to think about this for a while.

 

KD1JV

 

 

Hi Steve, thanks for the reply. I should have mentioned the visibility factor in bright light also plays into my request for a LCD display. However you decide to do it, I will be happy.

Joel 

N6ALT


On Nov 18, 2018, at 9:50 AM, Steven Weber <steve.kd1jv@...> wrote:

 

 

 

Using a LCD creates a few issues, mostly size and cost. I’d rather not go that route for this. We can always blank the LED display when not in use to save a few ma if that’s an issue.

 

Steve KD1JV

 

Wow Steve, this sounds great. Any chance you could incorporate a LCD display this time? Lower power consumption is top priority to me and many others.

Joel 

N6ALT

 

We

 

 


Re: Speaking of the Slop Bucket..

 

Steve I was thinking more like the Nokia 5110 graphics display or something like it. They are small and easy to read and have a back light that could be switched off or on through the firmware. Of course the Nokia display probably cost more than a 16x02 displays, those are dirt cheap. Also there are the cheap monochrome OLED displays that are pretty easy to read and are very small footprint but are low power consumption devices. There is so many available it’s hard to know which one to use. Thanks for at least entertaining the possibility.

Joel 
N6ALT

On Nov 18, 2018, at 10:22 AM, Steven Weber <steve.kd1jv@...> wrote:

Yes, the daylight readability is something to consider. Also more info can be displayed on a 2X16 display. But a common 2X16  module is huge compared to the rest of the rig. It’s nearly 50% of the size of the main board.  Well, I’ll have to think about this for a while.

 

KD1JV

 

 

Hi Steve, thanks for the reply. I should have mentioned the visibility factor in bright light also plays into my request for a LCD display. However you decide to do it, I will be happy.

Joel 

N6ALT


On Nov 18, 2018, at 9:50 AM, Steven Weber <steve.kd1jv@...> wrote:

 

 

 

Using a LCD creates a few issues, mostly size and cost. I’d rather not go that route for this. We can always blank the LED display when not in use to save a few ma if that’s an issue.

 

Steve KD1JV

 

Wow Steve, this sounds great. Any chance you could incorporate a LCD display this time? Lower power consumption is top priority to me and many others.

Joel 

N6ALT

 

We

 

 

<41817278ADE24DFDB34321BF88EC00FE.png>


Re: Speaking of the Slop Bucket..

Steven Weber
 

Joel,

 

I just fired up a Nokia 5110 display I bought a (long) while back. Found an Arduino library for it and it works. The cost is compatible with a 2x16 blue display, so I think that will be the way to go. The 5110 has a better (and lower profile) footprint then the common 2X16 display. The 5110 also frees up a bunch of I/O ports which might be handy. Since it runs on 3.3V, I think I’ll run the processor at 3.3V and eliminate the level shifters on to the Si5351 too.

 

Okay, you talked me into it.

 

I tried one of the 0.96” OLED displays and was surprised it was incredibly noisy. Not compatible with a HF receiver at all, wiped out everything. Their also relatively expensive at $7-8

 

Steve

 

 

Steve I was thinking more like the Nokia 5110 graphics display or something like it. They are small and easy to read and have a back light that could be switched off or on through the firmware. Of course the Nokia display probably cost more than a 16x02 displays, those are dirt cheap. Also there are the cheap monochrome OLED displays that are pretty easy to read and are very small footprint but are low power consumption devices. There is so many available it’s hard to know which one to use. Thanks for at least entertaining the possibility.

Joel 

N6ALT


On Nov 18, 2018, at 10:22 AM, Steven Weber <steve.kd1jv@...> wrote:

Yes, the daylight readability is something to consider. Also more info can be displayed on a 2X16 display. But a common 2X16  module is huge compared to the rest of the rig. It’s nearly 50% of the size of the main board.  Well, I’ll have to think about this for a while.

 

KD1JV

 

 

Hi Steve, thanks for the reply. I should have mentioned the visibility factor in bright light also plays into my request for a LCD display. However you decide to do it, I will be happy.

Joel 

N6ALT


On Nov 18, 2018, at 9:50 AM, Steven Weber <steve.kd1jv@...> wrote:

 

 

 

Using a LCD creates a few issues, mostly size and cost. I’d rather not go that route for this. We can always blank the LED display when not in use to save a few ma if that’s an issue.

 

Steve KD1JV

 

Wow Steve, this sounds great. Any chance you could incorporate a LCD display this time? Lower power consumption is top priority to me and many others.

Joel 

N6ALT

 

We

 

 

<41817278ADE24DFDB34321BF88EC00FE.png>

 


Re: Speaking of the Slop Bucket..

ajparent1/kb1gmx
 

On Sun, Nov 18, 2018 at 01:07 PM, Steven Weber wrote:
Nokia 5110

The big problem with them (N-5110) is they are old and may be hard to find in volume
and cheap.  

I haven't tried the OLED displays yet.  Its on the list of things.

I have used 1x8, 2x8, common 2x16, and 4x20 as the IO needed for them is about
6 IO pins or less if you use the more expensive SPI interface versions.  I've not had
issues with noise from those (spi or 4bit parallel).

As to back light, a PWM pin or simple series resistor can set the current for
bright, dim, off. at medium brightness less than 10 ma is not bad.

It would impact the IO layout some but the same four pins for LCD output are usable
for other things in between writes to the display.  Also A0-A3 can be used for output.
as its rare that 4 pins of analog input are needed.

Watch the processor clock at 3.3V for the spec I think limits to 8 or 12mhz.

The only real wish is 10hz display resolution.

Allison


Re: Speaking of the Slop Bucket..

Steven Weber
 

Whole bunch of sellers on ebay, they go for about $2.20.  Either they still make these or there were truck loads left over from when they were used in the phones. I thought the AD9850 modules would have a limited lifespan for availability, but they are still around, - at twice the price they used be for.  

 

Yes, at 3.3V the MEGA328 has to be run at 8 MHz, not a problem.

 

Steve

 

Subject: Re: [kd1jvdesigns] Speaking of the Slop Bucket..

 

On Sun, Nov 18, 2018 at 01:07 PM, Steven Weber wrote:
Nokia 5110

The big problem with them (N-5110) is they are old and may be hard to find in volume
and cheap.  

I haven't tried the OLED displays yet.  Its on the list of things.

I have used 1x8, 2x8, common 2x16, and 4x20 as the IO needed for them is about
6 IO pins or less if you use the more expensive SPI interface versions.  I've not had
issues with noise from those (spi or 4bit parallel).

As to back light, a PWM pin or simple series resistor can set the current for
bright, dim, off. at medium brightness less than 10 ma is not bad.

It would impact the IO layout some but the same four pins for LCD output are usable
for other things in between writes to the display.  Also A0-A3 can be used for output.
as its rare that 4 pins of analog input are needed.

Watch the processor clock at 3.3V for the spec I think limits to 8 or 12mhz.

The only real wish is 10hz display resolution.

Allison

 


Re: Speaking of the Slop Bucket..

 

Great Steve! Thanks. I look forward to seeing what you come up with.

Joel 
N6ALT

On Nov 18, 2018, at 1:07 PM, Steven Weber <steve.kd1jv@...> wrote:

Joel,

 

I just fired up a Nokia 5110 display I bought a (long) while back. Found an Arduino library for it and it works. The cost is compatible with a 2x16 blue display, so I think that will be the way to go. The 5110 has a better (and lower profile) footprint then the common 2X16 display. The 5110 also frees up a bunch of I/O ports which might be handy. Since it runs on 3.3V, I think I’ll run the processor at 3.3V and eliminate the level shifters on to the Si5351 too.

 

Okay, you talked me into it.

 

I tried one of the 0.96” OLED displays and was surprised it was incredibly noisy. Not compatible with a HF receiver at all, wiped out everything. Their also relatively expensive at $7-8

 

Steve

 

 

Steve I was thinking more like the Nokia 5110 graphics display or something like it. They are small and easy to read and have a back light that could be switched off or on through the firmware. Of course the Nokia display probably cost more than a 16x02 displays, those are dirt cheap. Also there are the cheap monochrome OLED displays that are pretty easy to read and are very small footprint but are low power consumption devices. There is so many available it’s hard to know which one to use. Thanks for at least entertaining the possibility.

Joel 

N6ALT


On Nov 18, 2018, at 10:22 AM, Steven Weber <steve.kd1jv@...> wrote:

Yes, the daylight readability is something to consider. Also more info can be displayed on a 2X16 display. But a common 2X16  module is huge compared to the rest of the rig. It’s nearly 50% of the size of the main board.  Well, I’ll have to think about this for a while.

 

KD1JV

 

 

Hi Steve, thanks for the reply. I should have mentioned the visibility factor in bright light also plays into my request for a LCD display. However you decide to do it, I will be happy.

Joel 

N6ALT


On Nov 18, 2018, at 9:50 AM, Steven Weber <steve.kd1jv@...> wrote:

 

 

 

Using a LCD creates a few issues, mostly size and cost. I’d rather not go that route for this. We can always blank the LED display when not in use to save a few ma if that’s an issue.

 

Steve KD1JV

 

Wow Steve, this sounds great. Any chance you could incorporate a LCD display this time? Lower power consumption is top priority to me and many others.

Joel 

N6ALT

 

We

 

 

<41817278ADE24DFDB34321BF88EC00FE.png>

 

<034B68FCD3934AE593D7043854D0EB9E.png>


Re: Speaking of the Slop Bucket..

Michael Dooley
 

Oh...  if there is a list for one with the LCD, please add me...  This sounds interesting..

Mike N5BGZ



From: Joel Caulkins/N6ALT <caulktel@...>
To: kd1jvdesigns@groups.io
Sent: Sunday, November 18, 2018 5:11 PM
Subject: Re: [kd1jvdesigns] Speaking of the Slop Bucket..

Great Steve! Thanks. I look forward to seeing what you come up with.

Joel 
N6ALT

On Nov 18, 2018, at 1:07 PM, Steven Weber <steve.kd1jv@...> wrote:

Joel,
 
I just fired up a Nokia 5110 display I bought a (long) while back. Found an Arduino library for it and it works. The cost is compatible with a 2x16 blue display, so I think that will be the way to go. The 5110 has a better (and lower profile) footprint then the common 2X16 display. The 5110 also frees up a bunch of I/O ports which might be handy. Since it runs on 3.3V, I think I’ll run the processor at 3.3V and eliminate the level shifters on to the Si5351 too.
 
Okay, you talked me into it.
 
I tried one of the 0.96” OLED displays and was surprised it was incredibly noisy. Not compatible with a HF receiver at all, wiped out everything. Their also relatively expensive at $7-8
 
Steve
 
 
Steve I was thinking more like the Nokia 5110 graphics display or something like it. They are small and easy to read and have a back light that could be switched off or on through the firmware. Of course the Nokia display probably cost more than a 16x02 displays, those are dirt cheap. Also there are the cheap monochrome OLED displays that are pretty easy to read and are very small footprint but are low power consumption devices. There is so many available it’s hard to know which one to use. Thanks for at least entertaining the possibility.
Joel 
N6ALT

On Nov 18, 2018, at 10:22 AM, Steven Weber <steve.kd1jv@...> wrote:
Yes, the daylight readability is something to consider. Also more info can be displayed on a 2X16 display. But a common 2X16  module is huge compared to the rest of the rig. It’s nearly 50% of the size of the main board.  Well, I’ll have to think about this for a while.
 
KD1JV
 
 
Hi Steve, thanks for the reply. I should have mentioned the visibility factor in bright light also plays into my request for a LCD display. However you decide to do it, I will be happy.
Joel 
N6ALT

On Nov 18, 2018, at 9:50 AM, Steven Weber <steve.kd1jv@...> wrote:
 
 
 
Using a LCD creates a few issues, mostly size and cost. I’d rather not go that route for this. We can always blank the LED display when not in use to save a few ma if that’s an issue.
 
Steve KD1JV
 
Wow Steve, this sounds great. Any chance you could incorporate a LCD display this time? Lower power consumption is top priority to me and many others.
Joel 
N6ALT
 
We
 
 
<41817278ADE24DFDB34321BF88EC00FE.png>
 
<034B68FCD3934AE593D7043854D0EB9E.png>



Re: Slop Bucket 20 BFO adjustment

Jer Tres
 

So, do we all need to update our firmware?


Re: Slop Bucket 20 BFO adjustment

Steven Weber
 

 

Only if you want to adjust the BFO frequency, which probably doesn’t need to be done.

 

Steve

 

So, do we all need to update our firmware?