$75.0 Buy It Now or Best Offer
free,30-Day Returns
Seller Store snjh1820
(1966) 99.3%,
Location: Guang Zhou
Ships to: US,
Item: 353677757076
Return shipping will be paid by:Buyer
All returns accepted:Returns Accepted
Item must be returned within:30 Days
Refund will be given as:Money Back
Compatible Brand:Universal
SENGTERBELLE:SENGTERBELLE
Type:Amplifier Board
Unit Type:Unit
Color:Other
Compatible Model:Universal
MPN:does not apply
Country/Region of Manufacture:China
Unit Quantity:1
Amplifier Class:Universal
Details：PCB size: 154*254*1.6MM FR4Works voltage: 0-AC220V >=0.05A0-AC9V >=1A0-AC14V >=1AWe have the suitable transformer for this board.https://www.ebay.com/itm/353283830396This preamp are using 1pcs 12AU7 / 2pcs 12AX7 and 1pcs 6DJ8 (6922) （note: the defalut are not include these tubes)We can provide the clear PDF schematic via email.Feature：ZERO-ZONE PRT-08A preamp is reference the famous CAT SL1 preamp Circuit , The sound quality is very good. Sharp dynamics, accurate positioning, medium frequency mellow, tube tastes very strong. was considered the almost the perfect tube preamp design. The CAT-SL1 design tubes are not like the other brands – multiple isotypes; but the targeted tube to meet the school requirements, the first level using U-tube 12AU7, The input tube; the second stage uses a high U tube (12AX7), which is an SRPP structure, taking its bandwidth and buffering between the front and the back, and also preparing for the third level. The third stage is 6DJ8, which has a larger screen output current, so as to push the rear stage power amplifier. The high-voltage power supply uses a regulated power supply, and the MOS tube is used as a voltage regulating tube to make it more tube tastes tube taste.The filament is divided into two sets of voltage regulators, which respectively supply 12.6V for 12AU7, 12AX7 and 6.3V for 6DJ8 (6922) In terms of ingredients, using Panasonic and 718 resistors, gold-plated ceramic tube holders, BC-Philips capacitors, ELNA capacitors, etc., high-voltage regulators using the Toshiba and coupling capacitors are ERO+MKP series, which has a high cost performance. In the PRT-08A, we added a 30 second delay on the output component.Avoid the whistling of the preamp when power on.Note：Diy kit ：all the parts need yourself to solder. not included tubesAssembled board：have tested well， not included tubes
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