Vintage Harmon Kardon Citation 1 Vacuum tube preamplifier for sale.
The Citation 1 is great for a collector of old records, because in addition to the RIAA equalization curve, it has selectable equalization circuits to adjust for the various recording equalizations that were used before they standardized on the RIAA curve.
The tone controls are stepped switches. This allow for completely flat frequency response if you desire. Because switches are used, it doesnâ€™t have the distortion caused by potentiometers.
This preamp is in working condition and sounds surprisingly good for itâ€™s age. It still sounds better than most solid state equipment. Upgraded with modern components it could sound superb.
This preamplifier appears to be nearly stock. Two of the tube shields are missing. However, the tube shields on the high level output tubes arenâ€™t even necessary.
The only work that appears to have been performed is the replacement of the filament rectifier diodes and the series resistors. The original pair of resistors were 3.3 Ohm. They were replaced with adjustable wirewound resistors. This allows you to adjust the filament voltage as you desire.
When this preamplifier was designed, the powerline voltages were lower. It is often necessary to add voltage dropping resistors to the filament supplies to reduce the filament voltage to the proper level, as the filament voltages are often too high because of the higher line voltage that we have today.
You can adjust the filament voltage to as low as 11 volts per tube for extended tube life, or as high as 12.6 volts for highest transconductance.. At present the filament voltage is adjusted for 11.6 Volts. I can readjust this for you if you prefer a different voltage setting.
These resistors can easily be replaced with fixed resistors to return it to a stock look.
The condition of this preamplifier is not pristine. See photos. But if you want great sound at a bargain price this preamplifier is for you.
Specification and original literature:
If you would like to upgrade the preamp, SDS Labs has designed a circuit board to replace the old style multi-section electrolytic capacitors with much better sounding modern electrolytic capacitors.
The preamplifier is warranted not to be DOA. I do not warranty the vacuum tubes. However, I will pack them well so that they wonâ€™t break. during shipping Or if you prefer I can ship the preamplifier with the tubes installed, but that is at your own risk.
Local buyers may pickup & save shipping cost. I will accept cash if you are local. But please, no cash through the mail.
Mailing is ACTUAL COST, NO Handling charges!!! Add insurance if desired.
Shipping weight is about 30 lbs.
I accept PayPal and can also accept credit card payments through PayPal. I don't accept e-checks. I only accept PayPal from buyers with verified addresses.
Additional photos available upon request.
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