[time-nuts] Efratom FRK-L pinout?

[Ulrich Bangert]

Ok Peter,

mine has the 3-row-connector too. Look at the connector in way so that
the connector as a whole is located at the LOWER side of the backplane.
The pinning that i use (got it from Lehman Scientific, where i bought
the FRK-L) is:

Lower row, pins counted from left to right:

1 -> 10 MHz rf out
2 -> GND return for rf out
3 -> GND 24 V power supply
4 -> + 24 V power supply
5 -> Resonance lock indicator
6 -> RB lamp voltage
7 -> not used

Middle row: not used at all

Upper row, pins counted from left to right:

1 -> not used
2 -> not used
3 -> not used
4 -> not used
5 -> not used
6 -> XTAL control voltage
7 -> not used

The RB Lamp voltage as well as the XTAL control voltage is measured
against power GND. The resonance lock indicator is a open collector
output capable of switching max. 50 mA. Max voltage at that pin is 70 V.
The suggested use of this pin is to switch a led which's anode is
connected to +24 V over 2k2 Ohms to gnd in case of lock.

If you supply your email address i can supply you the operating &
maintainance manual as pdf, abt. 5M bytes.

73 de Ulrich, DF6JB

> -----Ursprüngliche Nachricht-----
> Von: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] Im Auftrag von Peter Lacey
> Gesendet: Mittwoch, 26. April 2006 13:28
> An: 'Discussion of precise time and frequency measurement'
> Betreff: Re: [time-nuts] Efratom FRK-L pinout?
> 
> 
> Mine is the 3-row connector. Thanks.
> 
> Peter Lacey
> AA1ZU
> 
> -----Original Message-----
> From: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] On Behalf Of Ulrich Bangert
> Sent: Wednesday, April 26, 2006 2:46 AM
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] Efratom FRK-L pinout?
> 
> Peter,
> 
> FRK-Ls hve been sold in at least two flavours: One features a 
> coaxial connector for rf and a number of contacts in a single 
> row, the other features a 3-row-connector with rf beeing part of this.
> 
> Which flavour did you get?
> 
> 73 de Ulrich, DF6JB 
> 
> > -----Ursprüngliche Nachricht-----
> > Von: time-nuts-bounces at febo.com
> > [mailto:time-nuts-bounces at febo.com] Im Auftrag von Peter Lacey
> > Gesendet: Mittwoch, 26. April 2006 01:30
> > An: time-nuts at febo.com
> > Betreff: [time-nuts] Efratom FRK-L pinout?
> > 
> > 
> > Does anyone have a pinout diagram for and Efratom FRK-L
> > rubidium oscillator? I bought one on eBay assuming I could 
> > find the diagram on the net, but have had no luck. Thanks.
> > 
> >  
> > 
> > Peter Lacey
> > 
> > AA1ZU
> > 
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