Scott: Here are the analog output values I am seeing:
ad0 0.005 Spare ad1 2.316 +24 Volt Heater Supply ad2 2.327 +24 Volt Electronics Supply ad3 0.491 Lamp Drain Voltage ad4 0.343 Lamp Gate Voltage ad5 2.402 Crystal Heater Control ad6 2.358 Cell Heater Control ad7 1.557 Lamp Heater Control ad8 2.413 AC Photosignal ad9 2.491 Photocell I/V Voltage ad10 0.657 Case Temperature ad11 0.950 Crystal Thermistors ad12 0.958 Cell Thermistors ad13 0.957 Lamp Thermistors ad14 2.503 Frequency Pot Voltage ad15 0.005 Analog Ground ad16 2.520 22.48MHz Varactor Voltage ad17 3.190 360MHz Varactor Voltage ad18 1.910 Gain Control Voltage ad19 4.740 RF Synthesizer Lock Indicator This unit has a large passive heatsink and the values are from RbMon. Shaun Merrigan -----Original Message----- From: time-nuts <time-nuts-boun...@lists.febo.com> On Behalf Of Scott Mace via time-nuts Sent: Friday, November 16, 2018 1:37 PM To: time-nuts@lists.febo.com Cc: Scott Mace <sm...@intt.net> Subject: [time-nuts] PRS10 case temperature I have been experimenting with a PRS10 and using Lady Heather to collect data. This unit had several failed components in the lamp assembly, which I replaced and the unit locks well now. One thing I noticed is that on cold startup, the unit seems to think it's already at 40-50C, when in reality it's only slightly above room temperature. The sensor settles around 79-82C. I've measured the baseplate and it is around 50C. I believe that all of the ovens are running slightly low as a result (if I understand the circuit correctly). I'm thinking that the case temp sensor, a LM45C, on the power supply board is bad. Anyone else running a PRS10 with reasonably correct baseplate temperatures? Here are some of the numbers I'm seeing: AD1 - Heater supply : 24.360V AD2 - +24V supply: 24.370V AD3 - Lamp FET drain: 4.910V AD4 - Lamp FET gate: 4.080V AD5 - OCXO heater: 1.811V AD6 - Cell heater: 2.101V AD7 - Lamp heater: 1.513V AD8 - Photo signal: 3.831 AD9 - I/V converter: 4.804V AD10 - Case temperature: 80.80 C ^^^^ AD11 - XTAL thermistors: 0.961 AD12 - Cell thermistors: 0.971 AD13 - Lamp thermistors: 0.972 AD14 - Freq cal pot: 2.337 AD15 - Analog ground: 0.005V AD16 - TXCO varactor: 7.240V AD17 - VCO varactor: 11.520V AD18 - Multiplier gain: 11.520V AD19 - RF synth lock: 4.900V Scott _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.