Author Topic: Info Required on H-7XNMD0007 10MHz :: SOLVED  (Read 556 times)

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Offline Labrat101Topic starter

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Info Required on H-7XNMD0007 10MHz :: SOLVED
« on: February 25, 2021, 01:05:31 pm »
Hi, All
I would like to know if any one has ever seen one of these Oscillator 10Mhz boards before and has any information on it .
 I have acquired one and there seem to be no information available . There are plenty showing on Ebay etc . I guess someone
took them from a Cell tower or similar .
 Thanks in advance .
Yes, I could just put power on it and a scope . and see what happens .
 There is a 4 terminal power connector . The caps are rated at 16v so its properly 5v OXCO  Maybe 12V  .
 So if anyone has fired up one of these boards I would like to know . 
Thanks 
    :popcorn:
« Last Edit: March 03, 2021, 07:34:02 pm by Labrat101 »
"   All Started With A BIG Bang!! .  .   & Magic Smoke  ".
 

Offline Labrat101Topic starter

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Re: Info Required on H-7XNMD0007 10MHz
« Reply #1 on: March 03, 2021, 07:06:35 pm »
SOLVED  :-+
Hi ,OK  Thanks I guess No one else has one of these NDK 10Mhz Osc boards.
They are are made by JRC  ( Japanese Radio Corp. )
It was horribly out of Cal. When I Acquired it .
After a little reverse eng. and some a few probe tests I managed to fire it up .
So the outputs worked .
It has A Cal screw on the back side .
 I used a dual port Neo Bodnar GPSDO  and used that as my reference for the HP5385A.
The 4 pins are :-
   O   O   O    O   ( right )
    +   P    nc    -
  P  = Pulse,  Pos Pulse ON & Neg Pulse OFF  .    :popcorn:
  OCXO is 5 Volt
  It supply voltage to Connector 7 to 12 volt  Current 22ma Max load
 It requires a thermal over coat as it is very sensitive to drafts etc.
« Last Edit: March 03, 2021, 07:37:23 pm by Labrat101 »
"   All Started With A BIG Bang!! .  .   & Magic Smoke  ".
 


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