Re: [Elecraft] Signal source for KX3 temperature frequency calibration

[Dave]

For those considering using the excellent dual output Leo Bodnar GPSDO, be
aware that you cannot select certain combinations of output frequencies.

I have the dual output unit and it can be set for 10 MHz on one socket and
1 MHz on the other, which was ideal to drive my old Racal counter at 1 MHz
and a signal generator that needed 10 MHz. However, it is currently set at
49.152 to lock an Icom IC-9700 via their add-on board, but the other output
cannot be set at the same time to give 10 MHz for my K4D.

The limitation is related to the synthesiser chip used, no firmware update
will change that.

I have done the KX3 extended temp cal and it works really well in hot
temperatures. For the cal you really do need a very stable source, such as
a Leo Bodnar unit.

Incidentally, the K4 is stable enough for all except the most critical of
users… I have other 10 MHz references but don’t both to connect them to my
K4.

73 Dave G4AON
K4D #286
-- 
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Re: [Elecraft] Signal source for KX3 temperature frequency calibration

[Wes]

Indeed.  I have one of each.  Two of the Minis is probably a viable alternative 
unless you want two locked signals with a prescribed phase difference.  Of 
course then you need a splitter on the GPS antenna and two USB ports.  One 
problem with these is that they're TCXOs, not OCXOs.  They can take some time to 
establish good lock.


Wes  N7WS


On 6/14/2023 5:05 PM, G4GNX wrote:

Agreed, but as I already have the single frequency version, it will be cheaper 
too just buy another one. 🙂

73,
Alan - G4GNX




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Re: [Elecraft] Signal source for KX3 temperature frequency calibration

[G4GNX]

Agreed, but as I already have the single frequency version, it will be cheaper 
too just buy another one. 🙂

73,
Alan - G4GNX




> On 14 Jun 2023, at 22:38, Wes  wrote:
> 
> The Leo Bodnar two-channel GPSDO should give you both frequencies, although 
> setting them is really clunky.  The promised revised software never 
> materialized.
> 
> Wes  N7WS
> 
> On 6/14/2023 11:27 AM, G4GNX wrote:
>> It’s true that both rigs *can* use a 10MHz reference, but the far better way 
>> to run the IC-9700 is by using an injection board which pulls the onboard 
>> TCXO from the GPS reference at 49.152MHz, instead of using the 10MHz input 
>> which is only checked periodically.
>> 
>> The only disadvantage is that 2 different devices are required, one for 
>> 49.152MHz and one for 10MHz (for the K4).
>> 
>> 73,
>> Alan - G4GNX

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Re: [Elecraft] Signal source for KX3 temperature frequency calibration

[Wes]

The Leo Bodnar two-channel GPSDO should give you both frequencies, although 
setting them is really clunky.  The promised revised software never materialized.


Wes  N7WS

On 6/14/2023 11:27 AM, G4GNX wrote:

It’s true that both rigs *can* use a 10MHz reference, but the far better way to 
run the IC-9700 is by using an injection board which pulls the onboard TCXO 
from the GPS reference at 49.152MHz, instead of using the 10MHz input which is 
only checked periodically.

The only disadvantage is that 2 different devices are required, one for 
49.152MHz and one for 10MHz (for the K4).

73,
Alan - G4GNX




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Re: [Elecraft] Signal source for KX3 temperature frequency calibration

[G4GNX]

It’s true that both rigs *can* use a 10MHz reference, but the far better way to 
run the IC-9700 is by using an injection board which pulls the onboard TCXO 
from the GPS reference at 49.152MHz, instead of using the 10MHz input which is 
only checked periodically.

The only disadvantage is that 2 different devices are required, one for 
49.152MHz and one for 10MHz (for the K4).

73,
Alan - G4GNX




> On 14 Jun 2023, at 17:23, Björn Ekelund  wrote:
> 
> Why not just split the signal to both radios since both use a 10MHz reference?
> Or are they very far apart?
> 
> Björn SM7IUN
> 
> On Wed, Jun 14, 2023 at 4:34 PM G4GNX  > wrote:
>> AFAIK Leo ships Worldwide (perhaps not Russia)!
>> 
>> It’s an excellent device and fully configurable.
>> 
>> I use one on my IC-9700 and it works flawlessly. I’m considering buying 
>> another one for the K4, because I’m a bit OCD. 🤣
>> 
>> 73,
>> Alan - G4GNX
>> 
>> 
>> 
>> > On 14 Jun 2023, at 14:40, Björn Ekelund > > > wrote:
>> > 
>> > I'm not sure they ship to the US but I use this
>> > 
>> > to
>> > calibrate all my radios.
>> > 
>> > Björn SM7IUN
>> > 
>> 
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Re: [Elecraft] Signal source for KX3 temperature frequency calibration

[Björn Ekelund]

Why not just split the signal to both radios since both use a 10MHz
reference?
Or are they very far apart?

Björn SM7IUN

On Wed, Jun 14, 2023 at 4:34 PM G4GNX  wrote:

> AFAIK Leo ships Worldwide (perhaps not Russia)!
>
> It’s an excellent device and fully configurable.
>
> I use one on my IC-9700 and it works flawlessly. I’m considering buying
> another one for the K4, because I’m a bit OCD. 🤣
>
> 73,
> Alan - G4GNX
>
>
>
> > On 14 Jun 2023, at 14:40, Björn Ekelund  wrote:
> >
> > I'm not sure they ship to the US but I use this
> > <
> https://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=107&products_id=301
> >
> > to
> > calibrate all my radios.
> >
> > Björn SM7IUN
> >
>
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Re: [Elecraft] Signal source for KX3 temperature frequency calibration

[G4GNX]

AFAIK Leo ships Worldwide (perhaps not Russia)!

It’s an excellent device and fully configurable.

I use one on my IC-9700 and it works flawlessly. I’m considering buying another 
one for the K4, because I’m a bit OCD. 🤣

73,
Alan - G4GNX



> On 14 Jun 2023, at 14:40, Björn Ekelund  wrote:
> 
> I'm not sure they ship to the US but I use this
> 
> to
> calibrate all my radios.
> 
> Björn SM7IUN
> 

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Re: [Elecraft] Signal source for KX3 temperature frequency calibration

[Björn Ekelund]

I'm not sure they ship to the US but I use this

to
calibrate all my radios.

Björn SM7IUN


On Wed, Jun 14, 2023 at 2:31 AM Hank via Elecraft 
wrote:

> The TinySA ultra has many uses in the ham shack.
>
> It has a nice frequency generator function including AM/FM modulation plus
> some nice spectrum analyzer features only found on much more expensive
> devices.
>
> Hank
> K4HYJ
>
> > On Jun 13, 2023, at 12:59 PM, John Harper  wrote:
> >
> > tinySA Ultra:
> > https://www.tinysa.org/wiki/
> >
> > John AE5X
> > https://ae5x.blogspot.com
> >
> >> The XG50 signal generator is no longer available and I’m in need of a
> > stable signal to do the >extended temperature compensation procedure on
> my
> > KX3. I remember a discussion about using >the K3’s external converter
> > output but cannot locate any details.
> >
> >>
> >> Any suggestions?
> > __
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Re: [Elecraft] Signal source for KX3 temperature frequency calibration

[Hank via Elecraft]

The TinySA ultra has many uses in the ham shack. 

It has a nice frequency generator function including AM/FM modulation plus some 
nice spectrum analyzer features only found on much more expensive devices. 

Hank
K4HYJ 

> On Jun 13, 2023, at 12:59 PM, John Harper  wrote:
> 
> tinySA Ultra:
> https://www.tinysa.org/wiki/
> 
> John AE5X
> https://ae5x.blogspot.com
> 
>> The XG50 signal generator is no longer available and I’m in need of a
> stable signal to do the >extended temperature compensation procedure on my
> KX3. I remember a discussion about using >the K3’s external converter
> output but cannot locate any details.
> 
>> 
>> Any suggestions?
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Re: [Elecraft] Signal source for KX3 temperature frequency calibration

[Greg Troxel]

Bill Adams  writes:

> The XG50 signal generator is no longer available and I’m in need of a
> stable signal to do the extended temperature compensation procedure on
> my KX3. I remember a discussion about using the K3’s external
> converter output but cannot locate any details.

I haven't tried it, but I have heard that GPSDO with a 10 MHz square
wave output should work as the harmonic at 50 MHz is strong enough.

73 de n1dam



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Re: [Elecraft] Signal source for KX3 temperature frequency calibration

[John Harper]

tinySA Ultra:
https://www.tinysa.org/wiki/

John AE5X
https://ae5x.blogspot.com

>The XG50 signal generator is no longer available and I’m in need of a
stable signal to do the >extended temperature compensation procedure on my
KX3. I remember a discussion about using >the K3’s external converter
output but cannot locate any details.

>
>Any suggestions?
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Re: [Elecraft] Signal source for KX3 temperature frequency calibration

[Eric Garner]

I have an XG50 that you are welcome to borrow for the price of postage.

Eric KI7LTT

On Tue, Jun 13, 2023 at 9:11 AM Bill Adams  wrote:

>
> The XG50 signal generator is no longer available and I’m in need of a
> stable signal to do the extended temperature compensation procedure on my
> KX3. I remember a discussion about using the K3’s external converter output
> but cannot locate any details.
>
> Any suggestions?
>
> Bill
> AF4B
> Sent from my iPhone
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-- 
--Eric
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