Yorkville Sound YS1003 owner manual Replacement Tube Selection & Bias, Electronics, Connectors

Replacement Tube Selection & Bias

This amplifier features Yorkville’s auto-balancing / auto-matching tube biasing technology. As a result, when the time comes to replace the tubes in your Yorkville amplifier, there is no need to pay a premium for a matched set – nor does the bias need to be adjusted when you use a different brand. We make no claims as to which brands of tubes might sound best, but with auto-balancing / auto- matching, you are free to experiment without any need for concern that the amplifier or tubes will be distressed. Please note that auto-balancing / auto matching cannot fully compensate for different types of tubes - 6L6/5881s versus 6CA7/EL34s, for example.

Please note that although auto-balancing / auto matching allows you the freedom to select unmatched tubes from a variety of manufacturers, it may not be able to fully compensate for the use of a non-equivalent model or part number of tube

– 6L6/5881s versus 6CA7/EL34s, for example. Use of non-equivalent tubes may result in unpredictable performance.

S p e c i f i c a t i o n s

Electronics

Vacuum Tubes	2 x EL34 (alt 6CA7 types)
	3 x 12AX7 (alt 7025A)
Bias Supply	DC powered filament supply on preamp tubes
	Autobalancing
Power Output	50 Watts RMS
Speaker	YCV50: 12 inch Celestion® speaker
Channels	one lead & one clean channel
Input Impedance	1 Meg ohm
Tone Controls	Separate tone controls on both channels
	(Treble, Bass, & Middle)
Reverb	Master Volume and Reverb on Master Section
	Accutronics® long-reverb with dual-springs
Power Supply	Fully regulated

Input Jack	Connectors
	1/4 inch phone jack
Send Jack	Balanced 1/4 inch TRS
Return Jack	(Tip-positive / Ring-negative / Sleeve-ground)
	Unbalanced 1/4 inch phone jack, 10kohms
Speaker Jacks	Two 1/4 inch phone jacks
Footswitch Jack	1/4 inch TRS, accepts a standard,
	latching dual-footswitch & connecting cable

Cabinet Construction	Cabinet
	all plywood
Covering	Leatherette
Grille	Perforated 18-gauge painted steel
Dimensions (WxHxD)	with cloth covering
	23.0 inch x 18.5 inch x 9.0 inch
Weight	58.4 x 46.9 x 22.8 cm
	45 lbs (20.4 kg)

Power Requirements

120V 60Hz 1.0A

230V 50Hz 0,5A

Warranty Two-year, unlimited (even if you break it!) transferable warranty*

(valid in USA and Canada only)

Footswitch Included Two button (Channel Select / Boost) with separate LED indicators

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