Hey y'all at FDIM, have fun!

Recently I reported completing a QCX+ 20, and having issues with rf feedback. I've isolated some things from each other and have experienced marked improvement! I continue to fiddle with that. Thank you all for your help. 

I did notice something weird recently. 

As part of testing the rig,  I called cq a little bit. Today I was looking at my RBN results and noticed something weird,  the frequency on my display did not match the frequency on my reported signal. On display,  it says 14.020, reported on rbn it says 14.0196.

I attached a screenshot.

Am I misunderstanding a setting or is something off alignment?

When I do the same test with my Kenwood ts-140s, RBN and displayed frequency are the same. 

Thanks

KG4GVL 

thank you,
G Brandon Hoyt
Lakeland,  FL

Hi Brandon. If you aligned it but didn't calibrate it, either with a GPS or manually, then it quite possibly could be a little off frequency. Do you know how to do that? 

73 ... Ron

On Wed, May 18, 2022 at 11:55 AM GB Hoyt <qrprat77@...> wrote:

Hey y'all at FDIM, have fun!

Recently I reported completing a QCX+ 20, and having issues with rf feedback. I've isolated some things from each other and have experienced marked improvement! I continue to fiddle with that. Thank you all for your help. 

I did notice something weird recently. 

As part of testing the rig,  I called cq a little bit. Today I was looking at my RBN results and noticed something weird,  the frequency on my display did not match the frequency on my reported signal. On display,  it says 14.020, reported on rbn it says 14.0196.

I attached a screenshot.

Am I misunderstanding a setting or is something off alignment?

When I do the same test with my Kenwood ts-140s, RBN and displayed frequency are the same. 

Thanks

KG4GVL 

thank you,
G Brandon Hoyt
Lakeland,  FL

Thanks Ron for the tip!

I did not calibrate the oscillator either with a GPS or manually.

I noticed this reference on Page 35 of the OpMan107 Document:

"

The reference frequency for the Si5351A synthesiser chip. If you set this to the actual oscillation
frequency of the 27MHz crystal, then the output frequency of the radio will be accurate.
Usually the 27MHz crystals oscillate between 3 to 5kHz too high. This is the reason for the default
setting of 27.004MHz (4kHz high).
You can measure the 27MHz reference value yourself if you have a reliable general coverage
receiver whose frequency is known to be accurate. There are other methods too! You could set
the signal generator to a certain frequency such as 10MHz. Then beat it against a 10MHz
reference, for example. Measurement of the audio offset would enable a calculation of what the
correct 27MHz reference value ought to be.

"

so it sounds like I should be able to hear the 27MHz reference oscillator on or about 27MHz with my Kenwood TS-140s. Whatever Frequency I hear the oscillator on, is the frequecy that should be inputted for this value.

That's the way I think i should be able to manually adjust the frequency.

=============

G. Brandon Hoyt

Lakeland FL

On Wed, May 18, 2022 at 7:47 PM Ronald Taylor <wa7gil@...> wrote:

Hi Brandon. If you aligned it but didn't calibrate it, either with a GPS or manually, then it quite possibly could be a little off frequency. Do you know how to do that? 

73 ... Ron

On Wed, May 18, 2022 at 11:55 AM GB Hoyt <qrprat77@...> wrote:

Hey y'all at FDIM, have fun!

Recently I reported completing a QCX+ 20, and having issues with rf feedback. I've isolated some things from each other and have experienced marked improvement! I continue to fiddle with that. Thank you all for your help. 

I did notice something weird recently. 

As part of testing the rig,  I called cq a little bit. Today I was looking at my RBN results and noticed something weird,  the frequency on my display did not match the frequency on my reported signal. On display,  it says 14.020, reported on rbn it says 14.0196.

I attached a screenshot.

Am I misunderstanding a setting or is something off alignment?

When I do the same test with my Kenwood ts-140s, RBN and displayed frequency are the same. 

Thanks

KG4GVL 

thank you,
G Brandon Hoyt
Lakeland,  FL

That’s should work. I usually use my QLG2SE GPS. But if that’s busy elsewhere, I like to use a free instrument tuner app on my phone called PANOTUNER (not Piano) to listen on the correct frequency for my actual carrier. I tune the QCX to whatever frequency is required to hear the signal on the good receiver at 700 Hz tone. Then that display frequency on the QCX can be used in a ratio of that to wanted freq = the equivalent ratio between 27,004,000 and what it should be. Then set the reference frequency to that number. It isn’t as awkward as it sounds. 

Good luck on whatever method you choose. 

Ron

On Wed, May 18, 2022 at 18:32 GB Hoyt <qrprat77@...> wrote:

Thanks Ron for the tip!

I did not calibrate the oscillator either with a GPS or manually.

I noticed this reference on Page 35 of the OpMan107 Document:

"

The reference frequency for the Si5351A synthesiser chip. If you set this to the actual oscillation
frequency of the 27MHz crystal, then the output frequency of the radio will be accurate.
Usually the 27MHz crystals oscillate between 3 to 5kHz too high. This is the reason for the default
setting of 27.004MHz (4kHz high).
You can measure the 27MHz reference value yourself if you have a reliable general coverage
receiver whose frequency is known to be accurate. There are other methods too! You could set
the signal generator to a certain frequency such as 10MHz. Then beat it against a 10MHz
reference, for example. Measurement of the audio offset would enable a calculation of what the
correct 27MHz reference value ought to be.

"

so it sounds like I should be able to hear the 27MHz reference oscillator on or about 27MHz with my Kenwood TS-140s. Whatever Frequency I hear the oscillator on, is the frequecy that should be inputted for this value.

That's the way I think i should be able to manually adjust the frequency.

=============

G. Brandon Hoyt

Lakeland FL

On Wed, May 18, 2022 at 7:47 PM Ronald Taylor <wa7gil@...> wrote:

Hi Brandon. If you aligned it but didn't calibrate it, either with a GPS or manually, then it quite possibly could be a little off frequency. Do you know how to do that? 

73 ... Ron

On Wed, May 18, 2022 at 11:55 AM GB Hoyt <qrprat77@...> wrote:

Hey y'all at FDIM, have fun!

Recently I reported completing a QCX+ 20, and having issues with rf feedback. I've isolated some things from each other and have experienced marked improvement! I continue to fiddle with that. Thank you all for your help. 

I did notice something weird recently. 

As part of testing the rig,  I called cq a little bit. Today I was looking at my RBN results and noticed something weird,  the frequency on my display did not match the frequency on my reported signal. On display,  it says 14.020, reported on rbn it says 14.0196.

I attached a screenshot.

Am I misunderstanding a setting or is something off alignment?

When I do the same test with my Kenwood ts-140s, RBN and displayed frequency are the same. 

Thanks

KG4GVL 

thank you,
G Brandon Hoyt
Lakeland,  FL

Hey Ron,

Took a little Trial and Error, but i nailed 'er down.

Now RBN has me spot on (for most of the spotters :) )

73,

KG4GVL

=============

G. Brandon Hoyt

Lakeland FL

On Wed, May 18, 2022 at 9:52 PM Ronald Taylor <wa7gil@...> wrote:

That’s should work. I usually use my QLG2SE GPS. But if that’s busy elsewhere, I like to use a free instrument tuner app on my phone called PANOTUNER (not Piano) to listen on the correct frequency for my actual carrier. I tune the QCX to whatever frequency is required to hear the signal on the good receiver at 700 Hz tone. Then that display frequency on the QCX can be used in a ratio of that to wanted freq = the equivalent ratio between 27,004,000 and what it should be. Then set the reference frequency to that number. It isn’t as awkward as it sounds. 

Good luck on whatever method you choose. 

Ron

On Wed, May 18, 2022 at 18:32 GB Hoyt <qrprat77@...> wrote:

Thanks Ron for the tip!

I did not calibrate the oscillator either with a GPS or manually.

I noticed this reference on Page 35 of the OpMan107 Document:

"

The reference frequency for the Si5351A synthesiser chip. If you set this to the actual oscillation
frequency of the 27MHz crystal, then the output frequency of the radio will be accurate.
Usually the 27MHz crystals oscillate between 3 to 5kHz too high. This is the reason for the default
setting of 27.004MHz (4kHz high).
You can measure the 27MHz reference value yourself if you have a reliable general coverage
receiver whose frequency is known to be accurate. There are other methods too! You could set
the signal generator to a certain frequency such as 10MHz. Then beat it against a 10MHz
reference, for example. Measurement of the audio offset would enable a calculation of what the
correct 27MHz reference value ought to be.

"

so it sounds like I should be able to hear the 27MHz reference oscillator on or about 27MHz with my Kenwood TS-140s. Whatever Frequency I hear the oscillator on, is the frequecy that should be inputted for this value.

That's the way I think i should be able to manually adjust the frequency.

=============

G. Brandon Hoyt

Lakeland FL

On Wed, May 18, 2022 at 7:47 PM Ronald Taylor <wa7gil@...> wrote:

Hi Brandon. If you aligned it but didn't calibrate it, either with a GPS or manually, then it quite possibly could be a little off frequency. Do you know how to do that? 

73 ... Ron

On Wed, May 18, 2022 at 11:55 AM GB Hoyt <qrprat77@...> wrote:

Hey y'all at FDIM, have fun!

Recently I reported completing a QCX+ 20, and having issues with rf feedback. I've isolated some things from each other and have experienced marked improvement! I continue to fiddle with that. Thank you all for your help. 

I did notice something weird recently. 

As part of testing the rig,  I called cq a little bit. Today I was looking at my RBN results and noticed something weird,  the frequency on my display did not match the frequency on my reported signal. On display,  it says 14.020, reported on rbn it says 14.0196.

I attached a screenshot.

Am I misunderstanding a setting or is something off alignment?

When I do the same test with my Kenwood ts-140s, RBN and displayed frequency are the same. 

Thanks

KG4GVL 

thank you,
G Brandon Hoyt
Lakeland,  FL