Topics

Alternative for K3 TCXO?

Geert Jan de Groot
 

I see that the K3 TCXO is now also unavailable. Does anyone have experience with some of the alternative offerings as listed on Ebay?

As to the KAT3A tuner that was discussed earlier here, order status now lists it as "backordered 3/5/20"

Michael Harris <mike.harris@...>
 

I queried a good while ago who the manufacturer of the TCXO was and Elecraft wouldn't say. Maybe if they are no longer stocking the item they might loosen up.

Regards,

Mike VP8NO

On 17/01/2020 20:14, Geert Jan de Groot wrote:
I see that the K3 TCXO is now also unavailable. Does anyone have experience with some of the alternative offerings as listed on Ebay?
As to the KAT3A tuner that was discussed earlier here, order status now lists it as "backordered 3/5/20"
-=-=-=-=-=-=-=-=-=-=-=-

Peter Hardy <peter@...>
 

I bought a 'cheap' 1 ppm TCXO from a Chinese site on E bay.  It worked OK as far as I was concerned.  

73,

Peter G3VNH

Michael Foerster
 

I built my own using a thermistor and a transistor/resistor to heat up the crystal can, insulated with foam.  Set it for about 105 F.  Works fine.

Mike

ke9uw
 

Larry
 

That looks pretty nice.  Have you had any feedback from anyone trying these out? 

What applications were they using these with?

Would they be usable as a replacement for a defunct Xtal oscillator in a receiver?


Larry

W0OGH


Michael Foerster
 

I tried one of the customized TXCOs on eBay, seemed like a reasonable chance at $20.  Didn't work.

Frequency on my scope (200mhz scope) appeared correct, but the oscillator output was too low (9 mv p-p).

I tried to contact the vendor, but there was no response from them after a couple weeks.
   I was able to get my money back though...

I'm currently experimenting (again) with a home-brew oven...

Mike, W0IH

Christopher Scibelli
 

Where is it made?


-----Original Message-----
From: Michael Foerster <mcfroston@...>
To: Elecraft-K3 <Elecraft-K3@groups.io>
Sent: Tue, Apr 7, 2020 2:18 pm
Subject: Re: [Elecraft-K3] Alternative for K3 TCXO?

I tried one of the customized TXCOs on eBay, seemed like a reasonable chance at $20.  Didn't work.

Frequency on my scope (200mhz scope) appeared correct, but the oscillator output was too low (9 mv p-p).

I tried to contact the vendor, but there was no response from them after a couple weeks.
   I was able to get my money back though...

I'm currently experimenting (again) with a home-brew oven...

Mike, W0IH

Mel Farrer, K6KBE
 

Mike, why didn't you just add a FET stage untuned to get the level up, 6 parts dead bug.

Mel, K6KBE

On Tue, Apr 7, 2020 at 2:28 PM Christopher Scibelli via groups.io <nu1oscar=aol.com@groups.io> wrote:
Where is it made?

-----Original Message-----
From: Michael Foerster <mcfroston@...>
To: Elecraft-K3 <Elecraft-K3@groups.io>
Sent: Tue, Apr 7, 2020 2:18 pm
Subject: Re: [Elecraft-K3] Alternative for K3 TCXO?

I tried one of the customized TXCOs on eBay, seemed like a reasonable chance at $20.  Didn't work.

Frequency on my scope (200mhz scope) appeared correct, but the oscillator output was too low (9 mv p-p).

I tried to contact the vendor, but there was no response from them after a couple weeks.
   I was able to get my money back though...

I'm currently experimenting (again) with a home-brew oven...

Mike, W0IH

David Cutter
 

Not something I normally get involved with, so, please satisfy my ignorance: what are the main parameters we are looking for, is it just temperature stability, drift, low noise, all of the above? What temperature range ?

David G3UNA

On 07 April 2020 at 22:32 "Mel Farrer, K6KBE" <farrermesa@...> wrote:

Mike, why didn't you just add a FET stage untuned to get the level up, 6 parts dead bug.

Mel, K6KBE

On Tue, Apr 7, 2020 at 2:28 PM Christopher Scibelli via groups.io <nu1oscar= aol.com@groups.io> wrote:
Where is it made?

-----Original Message-----
From: Michael Foerster < mcfroston@...>
To: Elecraft-K3 < Elecraft-K3@groups.io>
Sent: Tue, Apr 7, 2020 2:18 pm
Subject: Re: [Elecraft-K3] Alternative for K3 TCXO?

I tried one of the customized TXCOs on eBay, seemed like a reasonable chance at $20.  Didn't work.

Frequency on my scope (200mhz scope) appeared correct, but the oscillator output was too low (9 mv p-p).

I tried to contact the vendor, but there was no response from them after a couple weeks.
   I was able to get my money back though...

I'm currently experimenting (again) with a home-brew oven...

Mike, W0IH

 

 

Michael Foerster
 

I just thought that for $20 (custom made in China, ~2 month delivery) it might be a worthwhile experiment to increase the reference oscillator stability (advertised as 0.1ppm).  My guess is, for this high of a frequency that the vendor’s circuit doesn’t doesn’t have a lot of gain.   Perhaps there are other reasons it didn’t work.  

The other thing I didn’t know about was if the K3’s Frequency Calibration would work.

   I didn’t test the amplitude of the stock oscillator (long story).

As for making an amplifier stage, I didn’t want to get into it...

Mike, W0IH

Christopher Scibelli
 

China will not be seeing any of my $$ so long as I can help it.

China lied, many died.



-----Original Message-----
From: Michael Foerster <mcfroston@...>
To: Elecraft-K3 <Elecraft-K3@groups.io>
Sent: Wed, Apr 8, 2020 7:39 am
Subject: Re: [Elecraft-K3] Alternative for K3 TCXO?

I just thought that for $20 (custom made in China, ~2 month delivery) it might be a worthwhile experiment to increase the reference oscillator stability (advertised as 0.1ppm).  My guess is, for this high of a frequency that the vendor’s circuit doesn’t doesn’t have a lot of gain.   Perhaps there are other reasons it didn’t work.  

The other thing I didn’t know about was if the K3’s Frequency Calibration would work.

   I didn’t test the amplitude of the stock oscillator (long story).

As for making an amplifier stage, I didn’t want to get into it...

Mike, W0IH

redarlington
 

And not to clutter the list up very much with off topic stuff or anything, but some response is warranted.  The big explosion of cases in NY appears to be from Europe and other parts of the USA.  Believe what you want.  The facts don't support what you're saying.  As always, China does what's best for China, but that's not new.  

-Bob

On Thu, Apr 9, 2020 at 10:58 AM Christopher Scibelli via groups.io <nu1oscar=aol.com@groups.io> wrote:
China will not be seeing any of my $$ so long as I can help it.

China lied, many died.



-----Original Message-----
From: Michael Foerster <mcfroston@...>
To: Elecraft-K3 <Elecraft-K3@groups.io>
Sent: Wed, Apr 8, 2020 7:39 am
Subject: Re: [Elecraft-K3] Alternative for K3 TCXO?

I just thought that for $20 (custom made in China, ~2 month delivery) it might be a worthwhile experiment to increase the reference oscillator stability (advertised as 0.1ppm).  My guess is, for this high of a frequency that the vendor’s circuit doesn’t doesn’t have a lot of gain.   Perhaps there are other reasons it didn’t work.  

The other thing I didn’t know about was if the K3’s Frequency Calibration would work.

   I didn’t test the amplitude of the stock oscillator (long story).

As for making an amplifier stage, I didn’t want to get into it...

Mike, W0IH

ab2tc
 

Hi,

Come on! Where do you think those Europeans and the other parts of the US got the virus from? That the virus started in China and has since spread to all the rest of the world is accepted science even in China. Period. Oops, there is that P word again, but I will not apologize for being "rude", nor for being super OT

AB2TC - Knut


On Thu, Apr 9, 2020 at 01:23 PM, redarlington wrote:
And not to clutter the list up very much with off topic stuff or anything, but some response is warranted.  The big explosion of cases in NY appears to be from Europe and other parts of the USA.  Believe what you want.  The facts don't support what you're saying.  As always, China does what's best for China, but that's not new.  
 
-Bob

On Thu, Apr 9, 2020 at 10:58 AM Christopher Scibelli via groups.io <nu1oscar=aol.com@groups.io> wrote:
China will not be seeing any of my $$ so long as I can help it.

China lied, many died.



-----Original Message-----
From: Michael Foerster <mcfroston@...>
To: Elecraft-K3 <Elecraft-K3@groups.io>
Sent: Wed, Apr 8, 2020 7:39 am
Subject: Re: [Elecraft-K3] Alternative for K3 TCXO?

I just thought that for $20 (custom made in China, ~2 month delivery) it might be a worthwhile experiment to increase the reference oscillator stability (advertised as 0.1ppm).  My guess is, for this high of a frequency that the vendor’s circuit doesn’t doesn’t have a lot of gain.   Perhaps there are other reasons it didn’t work.  

The other thing I didn’t know about was if the K3’s Frequency Calibration would work.

   I didn’t test the amplitude of the stock oscillator (long story).

As for making an amplifier stage, I didn’t want to get into it...

Mike, W0IH

 

 

Christopher Scibelli
 

Was going to write the same thing but I knew somebody else would chime in.

Yeah, CCP Virus is now the fault of those Italians.  It's pasta that caused the virus and not bats served at wet bars.  He must work for a Red Chinese company.

NU1O Chris


-----Original Message-----
From: ab2tc <ab2tc@...>
To: Elecraft-K3 <Elecraft-K3@groups.io>
Sent: Thu, Apr 9, 2020 11:14 pm
Subject: Re: [Elecraft-K3] Alternative for K3 TCXO?

Hi,

Come on! Where do you think those Europeans and the other parts of the US got the virus from? That the virus started in China and has since spread to all the rest of the world is accepted science even in China. Period. Oops, there is that P word again, but I will not apologize for being "rude", nor for being super OT

AB2TC - Knut

On Thu, Apr 9, 2020 at 01:23 PM, redarlington wrote:
And not to clutter the list up very much with off topic stuff or anything, but some response is warranted.  The big explosion of cases in NY appears to be from Europe and other parts of the USA.  Believe what you want.  The facts don't support what you're saying.  As always, China does what's best for China, but that's not new.  
 
-Bob

On Thu, Apr 9, 2020 at 10:58 AM Christopher Scibelli via groups.io <nu1oscar=aol.com@groups.io> wrote:
China will not be seeing any of my $$ so long as I can help it.

China lied, many died.



-----Original Message-----
From: Michael Foerster <mcfroston@...>
To: Elecraft-K3 <Elecraft-K3@groups.io>
Sent: Wed, Apr 8, 2020 7:39 am
Subject: Re: [Elecraft-K3] Alternative for K3 TCXO?

I just thought that for $20 (custom made in China, ~2 month delivery) it might be a worthwhile experiment to increase the reference oscillator stability (advertised as 0.1ppm).  My guess is, for this high of a frequency that the vendor’s circuit doesn’t doesn’t have a lot of gain.   Perhaps there are other reasons it didn’t work.  

The other thing I didn’t know about was if the K3’s Frequency Calibration would work.

   I didn’t test the amplitude of the stock oscillator (long story).

As for making an amplifier stage, I didn’t want to get into it...

Mike, W0IH