[time-nuts] FTS 1000B OCXO from a FTS 4040 CS

[Björn Gabrielsson]

Hi Stanley,

On Sat, 2009-01-17 at 19:29 -0800, Stanley Reynolds wrote:
> Was unable to adjust to 5Mhz, 4.9999752 was the best I could get with external pot. Internal pot has no effect, assume it is disconnected when external is present ? Was not hard to dissemble, the oven is not warm but has 29 volts maybe problem in the control circuit. Does anyone have any info I could use ?
> 
> I have downloaded a 4040B operation manual but it is not that similar to the 4040. This unit uses a 1802 RCA microprocessor so is much older than the B model, think it uses a 68xx type processor.
> 
> I have no manuals for the FTS-4040 and been unable to connect a PC to the 9 pin monitor/sync connector on the back, I need the pin out and perhaps a older monitor program as I only have monitor 2 and monitor 3 programs.
> 
> What I can see of the ocxo outside:
> 
> Has 2 SMA RF out connectors and a 9 pin D connector
> inside:
> Oven was inside a glass vacuum bottle with layers of foam insulation to close one end.
> 2 MTH15N20 transistors to heat the oven
> temp sensor on a small separate pc board part #56219-03909 REV A attached to oven
> main board not insulated is part # 56219-06802-00 REV D

There is some pinout information for 1000A and relatives in

   ftp://ftp.lysator.liu.se/~bg/time-nuts/FTS1200Doku.pdf

I do not know if pinout applies to 1000B.

--

   Björn