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Specification
Brand : Jolooyo
BulletPoint1 : Cost-Effective Sound Modification:Offers a more cost-effective sound modification plan compared to other McIntosh amplifiers.
BulletPoint2 : All-in-One Design:Single-point grounding with a ground resistance close to 0.02 ohms ensures a low-noise design.
BulletPoint3 : Tube Sound Characteristics:Employs MOSFET pass transistors for a tube-like sound without the rectification and regulation noise.
BulletPoint4 : Wm Amp|What Is Phono Input|High Voltage Regulation:Features a two-stage buck regulator filter and dual low-pass filters for purer power supply, mimicking battery-like performance.
BulletPoint5 : Soft-Start Feature:Incorporates a high-voltage soft-start and heater-voltage soft-start to protect tubes from voltage shocks.
ExternallyAssignedProductIdentifier : 6256294973542
ExternallyAssignedProductIdentifier1 : 0671506538092
ExternallyAssignedProductIdentifier2 : 671506538092
IncludedComponents : Board
ItemName : Tube Phono Amplifier with McIntosh C22 Core Circuit (MM/MC-RIAA) DIY KIT & Finished Board (DIY Kits)
ItemPackageDimensions_Height : 2.8 inches
ItemPackageDimensions_Length : 12.5 inches
ItemPackageDimensions_Width : 10 inches
ItemPackageQuantity : 1
ItemTypeKeyword : electronic-component-audio-amplifiers
Manufacturer : Jolooyo
Material : Aluminum
ModelNumber : DIY Kits
NumberOfChannels : 1
NumberOfItems : 1
PackageLevel : unit
PartNumber : C22Phono
ProductDescription :

Tube Phono Amplifier with McIntosh C22 Core Circuit (MM/MC-RIAA) DIY KIT & Finished Board

(1)Tech highlights:
It is based on the core circuit of the McIntosh C22 phono amplifier.Compared with the commonly reproduction of McIntosh C22, we improved:

1、High Voltage：Two-stage buck regulator filter, Two low-pass filter (with a corner frequency of 1.6Hz&16Hz) prevents power noise from being introduced into the amplifier. Provide purer power supply (close to battery).

2、The high-voltage power supply uses MOSFET as pass transistors, which have a sense of tube sound characteristics but rejecting the rectification and regulation noise.

3、high-voltage soft-start feature is included which will take about 5 second to reach the designed voltage protecting the tube from any voltage shock.

4、heater-voltage soft-start feature for vacuum heater is included which will take about 5 second to reach the designed voltage(12.6v) protecting the tube from any voltage shock and extending life.

5、all-in-one design, single-point grounding, ground resistance is close to the 0.02 ohm resistance value, low noisedesign.

6、PCB is Small with double-sided smt.

7、The triangular tube layout reduces the number of dual-channel common tubes, further improves the separation and reduces crosstalk.

8、Mirror HR-pin, please shift the tube counterclockwise every three months, reduce tube magnetization, further extend tube life and save money.

9、More cost-effective sound modification plan.

(2)Data:
RIAA
Input Resistance: 47K
Gain: 48DB(1KHz)
THD:0.07%(1KHz)
PCB SIZE: 153x153x1.6mm 1oz Cu, HASL with lead.
Power requirements:
Heater Volt: AC13~15V, I ≥ 0.8A; Best:14VAC@1A
High Volt: AC220~260V, I≥0.02A; Best:240VAC@0.05A

(3)Product configuration:
DIY kit: Contains the PCB and the components needed on the PCB, but does not include the power transformer and the electronic tube.

Finished board: Based on the well-tested board on the standard version kit, we verified all key points' voltage, and used the signal generator and oscilloscope for analog waveform double verification. We will not use this board for listening test.

All finished pcbs are all carefully hand-soldered and fully tests, so the price is higher and less cost performance. Price-sensitive consumers but with have DIY ability are recommended to choose the kit.

(4)Schematic & key point of debugging:
PCB comes with component parameters for easy installation.

We only refer the schematic of the amplification part of the circuit. If you need full circuit parameter, please read the component value with the PCB by yourself; we do not provide additionally.

Please keep test point voltage close enough to it, +-20% is also permitted.

ProductSiteLaunchDate : 2024-08-01T03:31:09.368Z
Style : Not With Tube
SupplierDeclaredDgHzRegulation : not_applicable
SupplierDeclaredHasProductIdentifierExemption : 1
UnitCount : 1