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SMALL CAPACITORS RATHER THAN VERY LARGE ONES THIS IS WHY YOU OFTEN SEE
SMALL CAPACITORS IN POWER SUPPLIES FOR RF CIRCUITS.  A MEASUREMENT OF THE
RF NOISE ON THE AC LINE CONNECTION OF THE HPS 1A APPEARS IN FIGURE 8.  THIS
TYPE OF MEASUREMENT WAS RECENTLY MADE POSSIBLE BY A GENEROUS DONATION OF
NEW TEST EQUIPMENT BY DR ULRICH ROHDE, N1UL, TO BE DESCRIBED IN A FUTURE
ARTICLE.  WITH A TYPICAL HF TRANSCEIVER AND AN 80 METER DIPOLE AT MODEST
HEIGHT, A COUPLE OF S7 LEVEL SPURS ABOUT 130 KHZ APART COULD BE HEARD ON 15
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METERS, ALONG WITH A NUMBER OF MUCH LOWER SPURS ON OTHER BANDS MOST OF
WHICH DID NOT MOVE THE S METER.  NOTE THAT THIS AGREES VERY WELL WITH THE
AC LINE NOISE MEASUREMENT.  GAMMA REPORTS THAT THEY ARE WORKING ON A
SOLUTION TO THE NOISE ISSUE.  ALTHOUGH THE HPS 1A GENERATES MORE RF NOISE
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YTS/344 GW3CDP/349 HA0DU/354 HB9BGV/344 HB9BZA/344 HB9CIP/344 HL3IUA/342
I2PEI/350 I2PJA/354 I4EAT/350 I4IKW/343 I4IZZ/342 I4MKN/363 I5FLN/361 I7
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