1. I have two of these. One just stopped capturing a month ago. Are you taking these in to update? I will gladly pay. I did update the power supplies years ago to ones recommended that don't give off all that crazy heat.

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2. Hi Fran, the original lay-out was made for one 7805 which has the cooling grounded to, just use one 7805and you don't need that resistor combination either

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3. Fran… Just found your GC-1000.. I built one of these long time ago. First part of your video, the display comes up blank when you turn it on because it has no data for accurate time. That is the way mine worked. Now I will say I built mine some time in the late 70's or so. Built lots of Heath stuff. No mod's just base kits. I was a ham and had mine hooked to a di-pole antenna ( G5RV ) and we live high on a hill. Lit of wind and I think a static charge took my receiver out. It does not receive at all. Will finish your video and see if you have a fix for it. The receiver came pre-assembled and you just put it in the case. Not serviceable best of my knowledge. Thanks for what you do… Will check back to see if you still responded to this… Later. Gerry

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4. This motivates me to tune up my GC-1000 clock which no longer picks up any of the 3 frequencies. I've got the manual so hopefully it should be a matter of going through the final checkout and tuning to tweak anything that has drifted.

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5. Hi Fran. Ever think of playing with pinball machines? I know there’s a guy in Philly I hope to visit someday

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6. I have a Heathkit GC-1000 that has already had the power supply improved a couple of years ago. My clock has now failed. I wish I could find someone who could fix it for me.

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7. I'm happy that you got the clock going the way that it should work. i like watching your videos.

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8. those substitution boxes are very neat! i like that…

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9. Hello Fran; The input voltage of 9 volts dropped down to the regulated 5 volts output is just fine, " temperature is within normal parameters ".

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10. With RESPECT: What a bodge Fran, the clock runs well as it was originally designed before the switch mod to the power supply. The clock's original dropping resistor on the 7805 kept the 3.6 MHz crystal warm with it's "Heat Dissipation" and stabilized in the cabinet environment. This allows the computed correction voltage applied to the 3.6 MHz oscillator to remain somewhat valid when the WWV signal is lost! It was a "poor man's" way at achieving an OCXO without the cost. When the cabinet temp was well above ambient room temperature the crystal was less likely to drift with room temperature changes. Please read the entire manual, the clock is more complex than you think. YES, it does compute and apply corrections to the clock's main oscillator! The longer the clock runs while receiving valid WWV data, the closer the oscillator is trimmed. After about a month the clock WILL NOT drift when the signal is lost, fathom that! By the way, alignment of the receiver must be done differently than you think. You first need to align the IF stages to 455Khz with a signal generator then tune the crystals to frequency. When complete peak the RF stage for maximum reception at each channel. (5, 10, & 15 MHz). My clock has run perfectly since 1983 and I am 1480 miles from WWV in Boulder Colorado. I do use an external antenna on it, a simple 10 MHz inverted V antenna works well on all three frequencies. 73 – KV4WM – A US Navy Nuclear Submarine Veteran and FCC Licensed Radio Operator. P.S. make sure the 100 Hz and 1000 Hz Tone decoders are kept centered from time to time, they do drift a little over time (years).

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