[email protected] wrote:
Bill I have had several of these through my hands over the years and the outside of the crystal oven does get hot but not exceptionally so. Certainly it should /not/ require any extra ventilation. I would suspect that you have a faulty oven heater controller in there and that the heater is running at full current all the time.I own one RACAL-DANA 1992 (Standard- TCXO). I purchased one with the Option 04E on eBAY.The 04E chassis is sealed and the internal OCXO overheats due to lack of cooling air. This causes the counter to stop taking measurements. I had to add ventilation holes on the top and right side of the chassis lid to obtain reliable operation. Both counters work up to 1,750 MHz. Bill Hanna
What frequency does the standard put out? The frequency and the current drawn by the oven should both settle down after about 15 minutes from cold.
Also if you really meant 1,750 MHz on both inputs that's way better than it should be, pretty amazing really :^)
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