Category Archives: Testing

Restoring HP3335A Part 2

After cleaning the synthesizer inside and out, I replaced multiple screws that were missing from the internal metal frame, and bolted down the power supply, which was obviously replaced in the past (without putting it back in properly).  Despite the … Continue reading

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Restoring a HP 3335A to full operation

I’ve always been sort of a time nut, but that’s pretty closely related to frequency.  The ARRL helps to sponsor a periodic Frequency Measurement Test, usually held in April and November.  A good friend of mine, John WA1ABI, always participates … Continue reading

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First Radials on the Ground for Inverted L

I’ve been using a low loop, about 450 feet of wire, around 20 to 30 feet off the ground for years.  It worked well for me, enabling me to get 9-band DXCC and 8-band WAS.  But the sunspots have diminished, … Continue reading

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K1 30-meter Emissions, Revisited

So I decided to open up my K1 and recheck the 30-meter bandpass filter alignment, guessing that the simple “peak coils for maximum” in the manual might also tend to peak the spurious emissions for maximum as well.  Sure enough … Continue reading

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Elecraft K1 Emissions

After completing the internal tuner add-on for my K1, I wanted to run emission tests on it as well.  My unit is two bands: 30-meter and 20-meter. FCC Limit:  For transmitters installed after January 1, 2003, the mean power of … Continue reading

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