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Details about  SL1 Tube Valve Preamplifier Amplifier DIY Kit (Stereo), Based on CAT SL-1

SL1 Tube Valve Preamplifier Amplifier DIY Kit (Stereo), Based on CAT SL-1 See original listing
Item Sold
Item condition:
Aug 03, 2013 07:09:16 PDT
US $116.00
$16.00 Standard Shipping from outside US | See details
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Item location:
default, default, Hong Kong


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Last updated on  Jul 26, 2013 10:45:49 PDT  View all revisions

Item specifics

New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ... Read moreabout the condition
Number of Channels:



Analog Metric



Number of L/R RCA Inputs:



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SL1 Tube Valve Preamplifier Amplifier DIY Kit (Stereo), Based on  CAT SL-1

Package Include

1. DIY Kit ref CAT SL-1 Tube Preamplifier (Stereo)
2. Assembly Manual

The design of this preamplifier is reference to the classic CAT SL-1 preamplifier. By using three tube stages:12AU7, 12AX7 and 6DJ8; The first-stage use 12AU7which is denoted with high-bandwidth and providing sweet sound. The second stage is even more amazing; the use of high-magnification tube 12AX7 in SRPP configuration, it can create extremely broad bandwidth and ultra dynamic. Finally, the output is done by using 6DJ8 to obtain very low output impedance and increase the driving capability. The output voltage swing can be reach more than 50V.
1. One 12AU7, two 12AX7, and one 6DJ8.
2. First two amplification stages consist of 12AU7 in common cathode and then 12AX7 in SRPP. The final stage are cathode follower provided by 6DJ8
3. Two single-ended inputs and two single-ended outputs.
4. Symmetric layout design and signal paths with minimum parasitic.
5. Dedicated ground and power rails layout design.
6. Four large reservoir decoupling capacitors for power rails.
7. Power requirements: one 260V DC, one 12.6V DC, and one 6.3V AC.
8. PCB dimension: 138mm (W) x 221mm (L)
9. PCB thickness: 2.4mm, double layer, 2oz copper. 


1. HV400 Variable Solid-state High Voltage Regulator Kit & T30 Toroidal Power Transformer

2. PS200 / TVR 6V6 Variable Tube Voltage Regulator Kit & T120 Toroidal Power Transformer

Please kindly email us for combined shipping.

Payment Method:
Paypal and Credit Cards.

Any inquiries please contact us by . We usual response within  24 hours.
We offer combined shipping discounts
Item will be dispatched 1-3 business days after payment settlement.

Please have your contact phone number in your payment notice for shipping purpose.

Item will be shipped by air parcel and marked as "GIFT" with a lower value declaration .

To United States , Canada, Australia, it usually takes 5-10 days
To most European countries, it usually takes 7-14 days.

Please contact us if you cannot receive the items over 20 days.

International Buyer:
Import duties, taxes, and charges are not included in the item price or shipping cost. Buyer need take the responsibility of these charges.

Return Policy:
If you receive a defective item, we guarantee to exchange within 7 days of receipt. Buyer will be responsible for the return shipping cost.
Refund only if the received item are inconsistent with the item descriptions. 
If there are any problems, please do not leave us negative feedback before send us an email for help, as we will resolve your problem absolutely.

We have more available stock. Please contact us for combined shipping discounts. Thanks

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