Message-ID: <5.1.0.14.2.20020817091402.00a00300@mail.pncl.co.uk>
Date: Sat, 17 Aug 2002 09:43:58 +0100
To: rsgb_lf_group@blacksheep.org
From: "Walter Blanchard" <blanch@pncl.co.uk>
Subject: LF: Re: Piezo oscs
In-reply-to: <5.1.0.14.0.20020816115038.00b11e50@gemini.herts.ac.uk>
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At 12:10 16/08/02 +0100, you wrote:

>Dear LF Group,
>
>A while ago, I got a 10MHz OCXO reference - one of CARC's surplus goodies. 
>It is a Piezo Systems model 2810007-1, and appears to be a clone of the 
>HP10811 references. I have the pin-out for the HP unit, but I remember 
>G3JKV mentioning that these units had a slightly different pin out from 
>the HP original - does anybody know what the difference is?

Hi Jim,

Pin 1 is next to the little hole in the tagboard.
1 = Osc out.
2 = Osc ground
3 = +24v
4 = 24v grd
14 = Oven +24v
15 = Oven grd.

They are fast warmup so take 600 mA at 24v for the first 15 mins or so then 
drop to 80-100 mA.
The changeover is very sudden so I suspect it has a dual high/low power heater

Walter G3JKV.

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