TCXO source - diyAudio
Go Back   Home > Forums > Design & Build > Parts
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 16th July 2002, 04:00 PM   #1
diyAudio Member
Join Date: Jul 2002
Location: Boston, MA
Default TCXO source

Hi there,
I am looking for TCXO (temperature-compensated crystal ocillator) to reclock my DAC.
Anybody know where I can get the precise ones? any frequency
  Reply With Quote
Old 16th July 2002, 09:01 PM   #2
diyAudio Member
jackinnj's Avatar
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Default TCXO source

Search under crystal in "Business Equipment/Test and Measurement" -- there are always sellers of HP TCXO's -- usually these are pulled from HP5328 frequency counters with option 10. Occasionally you will see an HP5334 with same. Lastly, some HP3586's (Selective Level Receiver) have a very stable oven - in this series the option is 004 -- all the above use 10 MHz. You can even buy a rubidium frequency source on EBay if you look frequently enough.

You can also try or
  Reply With Quote
Old 18th July 2002, 06:20 PM   #3
diyAudio Member
jackinnj's Avatar
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Default TCXO and PLL discussion in Analog Dialogu

The new issue of Analogue Dialogue has a lengthy discussion of PLLs and a brief mention of tcxo's -- points out some of the problems using A-T cut crystals

if you're wondering where all the low-noise ampls are coming from , read the article on Ultrasound in the same issue.
  Reply With Quote
Old 18th July 2002, 08:26 PM   #4
Join Date: Dec 2001
Location: Zamboanga, City of Flowers, Mindanao
Send a message via Yahoo to Elso Kwak
Question AT cut crystals

Hi Jackinnj,
Where exactly did you find the remark about the AT cut crystals? I could't find it.
  Reply With Quote
Old 18th July 2002, 08:58 PM   #5
diyAudio Member
jackinnj's Avatar
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
I snipped from the article below:

<em>Q. Iíve selected my synthesizer based on the output frequency required. What about
choosing the other elements in the PLL?
A. Frequency Reference: A good, high quality, low-phase-noise reference is crucial to a stable
low-phase-noise RF output. A square wave or clipped sine wave available from a TCXO crystal
offers excellent performance, because the sharper clocking edge results in less phase jitter at the
R-counter output. The ADF4206 family features on-board oscillator circuitry allowing low cost
AT-cut crystals to be used as the reference. <b>While predictable AT crystals cost one third as
much as TCXOs, their temperature stability is poor unless a compensation scheme with a
varactor is implemented.</b></em>

I have one of those 10e-9 ovenized sources that I run my counter and synthesizer from.
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Citypulse 7.2X II DAC with TCXO chamcal Digital Source 0 19th February 2008 07:42 PM
Where can I buy TCXO ackcheng Digital Source 0 21st February 2005 04:04 PM
Tcxo XTAL Digital Source 21 17th May 2004 01:18 AM
Tcxo XTAL Parts 0 11th May 2004 09:21 AM
Where can I found TCXO? omar Digital Source 19 27th March 2003 09:52 PM

New To Site? Need Help?

All times are GMT. The time now is 01:52 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2