 |
 Vintage Harman Kardon Citation Twenty Two 22 2 Channel Power Amplifier $324.99 Time Remaining: 14d 8h 1m Buy It Now for only: $324.99 |
 Harman Kardon Citation Twenty One 21 Control Pre Amplifier $19.99 (1 Bid) Time Remaining: 2d 5h 33m |
 HARMAN KARDON CITATION II STEREOPHONIC HIGH FIDELITY TUBE POWER AMPLIFIER $2,499.00 Time Remaining: 17d 15h 52m Buy It Now for only: $2,499.00 |
 Vintage Harman Kardon Citation Twenty One 21 2 Preamplifier Preamp $174.99 Time Remaining: 14d 8h 1m Buy It Now for only: $174.99 |
 Harman Kardon Citation Sixteen 16 Amplifier Audiophile Reference $369.99 Time Remaining: 16d 3h 35m Buy It Now for only: $369.99 |
 HARMAN KARDON CITATION 16 16A RESTORATION SERVICE $450.00 Time Remaining: 29d 19h 7m Buy It Now for only: $450.00 |
 2pc Citation 12 MOSFET Power Amp PCB ref Harmon Kardon $17.98 Time Remaining: 24d 16h 11m Buy It Now for only: $17.98 |
 Citation 12 MOSFET Power Amp DIY Kit ref Harmon Kardon $79.90 Time Remaining: 16d 15h 19m Buy It Now for only: $79.90 |
 HARMAN KARDON CITATION TWENTY ONE 21 CONTROL PREAMPLIFIER IN BOX PLEASE READ ALL $59.00 Time Remaining: 12h 29m |
 Vintage Harman Kardon Citation 11 eleven preamp preamplifier working beautiful $349.99 Time Remaining: 21d 8h 46m Buy It Now for only: $349.99 |
 2x Citation 12 Mono Amplifier Kit ref Harmon Kardon $134.72 Time Remaining: 8d 18h 13m Buy It Now for only: $134.72 |
 Citation 12 Mono Amplifier S2 Kit ref Harmon Kardon $143.46 Time Remaining: 8d 18h 10m Buy It Now for only: $143.46 |
 Harman Kardon Citation III Tuner Ad1962Article Tube $8.00 Time Remaining: 6d 23h 54m Buy It Now for only: $8.00 |
 Harmon Kardon Citation 12 Solid State Amplifier in good working condition $499.00 Time Remaining: 25d 7h 52m Buy It Now for only: $499.00 |
 Vintage Harman Kardon Citation Fifteen 15 Stereo FM Tuner $275.00 Time Remaining: 19d 19h 38m Buy It Now for only: $275.00 |
 Harman Kardon Citation 17 Stereo 2 Channel Pre Amp Pre Amplifier Preamp $149.00 Time Remaining: 5d 10h 41m |
 Harman Kardon Citation B Amplifier Review 1964 2 pgs $13.00 Time Remaining: 29d 23h 50m Buy It Now for only: $13.00 |
 Harman Kardon Citation 16a 16s Power Amplifier Ad1978 $12.00 Time Remaining: 18d 23h 48m Buy It Now for only: $12.00 |
 Harman Kardon Citation 25 Preamp 5 pg 1989 Full Test $14.00 Time Remaining: 28d 23h 30m Buy It Now for only: $14.00 |
 Harman Kardon Citation III Tube Tuner Ad 1962 Article Info Frame it $6.99 Time Remaining: 27d 22h 45m Buy It Now for only: $6.99 |
 Harman Kardon Citation 22 Amp Review3 pgs 1987 Specs $7.99 Time Remaining: 1d 19m Buy It Now for only: $7.99 |
 Harman Kardon Citation 25 Preamp 5 pg 1989 Full Test $14.00 Time Remaining: 28d 23h 29m Buy It Now for only: $14.00 |
 Harman Kardon Citation 11 Stereo 2 Channel Pre Amp Pre Amplifier Preamp $99.00 (1 Bid) Time Remaining: 5d 10h 37m |
 Harman Kardon Citation 1616a Amplifier Review2 pgs $7.99 Time Remaining: 4d 22h 48m Buy It Now for only: $7.99 |
 Harman Kardon Citation 13 Speaker Review 1972 3 pages $7.99 Time Remaining: 17d 23h 11m Buy It Now for only: $7.99 |
 Harman Kardon Citation 25 Preamp Review 5 pg 1989 Full Test Specs Info $9.99 Time Remaining: 24d 23h 23m Buy It Now for only: $9.99 |
 Harman Kardon Ad Citation 12 Amp11 Pre930 Receiver $8.00 Time Remaining: 4d 2h 4m Buy It Now for only: $8.00 |
 Harman Kardon Citation 1616A Amplifier Review Rare $13.00 Time Remaining: 2d 23h 21m Buy It Now for only: $13.00 |
 Harman Kardon Citation 16A401430Turntable Ad fr 1978 $11.00 Time Remaining: 21d 9m Buy It Now for only: $11.00 |
 Harman Kardon Citation 16A Sixteen A Stereo 2 Channel Power Amp Amplifier $299.00 Time Remaining: 5d 10h 20m |
 Harman Kardon Citation 21 Preamp Review 2 pg 1987 Full Test Specs $7.99 Time Remaining: 1d 23h 49m Buy It Now for only: $7.99 |
 Harman Kardon AdST 7 TurntableCitation 16430 Pre $7.00 Time Remaining: 9d 35m Buy It Now for only: $7.00 |
 HK Citation 19 Amplifier Review 2 pg 1978 Full Test $8.99 Time Remaining: 1d 23h 49m Buy It Now for only: $8.99 |
 Harman Kardon Citation 16 Ad 3 pgs 191817s1716s $8.00 Time Remaining: 9d 23h 5m Buy It Now for only: $8.00 |
 Harman Kardon Citation A Preamp Ad4 pgs1962Full Spec $8.00 Time Remaining: 5d 23h 57m Buy It Now for only: $8.00 |
 Harman Kardon Citation B Amplifier Review 2 pgs 1964 $7.99 Time Remaining: 6d 22h 39m Buy It Now for only: $7.99 |
 HARMAN KARDON CITATION 23 AM FM Digital TUNER with ACTIVE TRACKING REMOTE $299.99 Time Remaining: 5d 6h 29m Buy It Now for only: $359.99 |
 Stew Hegeman in Harman Kardon Citation I II Tube Amp Pre Advertisment 1959 $8.99 Time Remaining: 9d 23h 5m Buy It Now for only: $8.99 |
 Harman Kardon Ad from 1964 Citation A RARE $7.00 Time Remaining: 17d 19m Buy It Now for only: $7.00 |
 Harman Kardon Citation B Ad from 1964 very rare $8.00 Time Remaining: 9d 35m Buy It Now for only: $8.00 |
 Harman Kardon Citation 11 Preamp Ad from 1971 $9.00 Time Remaining: 11d 23h 31m Buy It Now for only: $9.00 |
 Harman Kardon Citation 23 AmpPreTuner Ad 2 pgs1987 $9.00 Time Remaining: 9d 23h 5m Buy It Now for only: $9.00 |
 Harman Kardon Ad1959Citation I II Amp Stew Hegeman $10.99 Time Remaining: 9d 23h 5m Buy It Now for only: $10.99 |
 Harman Kardon Citation 23 AM FM supertuner test review Audio magazine 1 88 $2.99 Time Remaining: 4d 12h 51m Buy It Now for only: $3.99 |
 Harman Kardon Citation X Speaker Ad from 1960Article $11.00 Time Remaining: 9d 23h 5m Buy It Now for only: $11.00 |
 Harman Kardon Ad 1959 Citation I II Preamp Amp Articles Info 1 pg Stew H $15.30 Time Remaining: 19d 23h 29m Buy It Now for only: $15.30 |
 Harman Kardon Citation I Tube Preamp REVIEW 3 page 1960 Best Ever Made $24.00 Time Remaining: 3d 5m Buy It Now for only: $24.00 |
 Harman Kardon Citation A Preamp Ad 1963 1 pg Article $12.00 Time Remaining: 9d 23h 5m Buy It Now for only: $12.00 |
 Harman Kardon Citation B Amplifier Review 1964 2 pgs $13.00 Time Remaining: 9d 35m Buy It Now for only: $13.00 |
Electrical noise from power supply?
I use one of my computers to play music. I have it connected to a high end stereo system ( Harmon Kardon Citation series amps) I was using a desktop style case that is designed to look nice in a stereo stand, but have had tremendous problems with the system in that case. I just changed the case for a mini-tower with a Codegen 450W power supply. Now I am getting a hum from the Sound Blaster card and from the on-board sound card. These are the same I/F cards that were in the system to begin with. The only different parts are the case and power supply. The P/S must be the responsible item. I am looking for a low electrical noise P/S for this system. Does anyone know of such a beast? I am not concerned with Ambient noise (i.e. what you hear) it's more of an issue of whta interference noise it generates.
Thanks
That sounds more like an open input than a power supply problem.
Computer power supplies are switching types and would not produce the 'hum' that you mention.
If you had no hum before you changed cases, then look for a bad cable, open input, missing ground.
Harman Kardon Citation II Restoration- Part 1