PRT05A electron tube preamp PCB reference CL electron tube preamp circuit
PCB size: 144*178*1.6MM, tin spraying process
PCB integrates high voltage regulator circuit (260VDC) and filament voltage regulator circuit (6.3VDC).
This edition is only suitable for 12AX7, 12AU7 and 12AT7. 12AX7 is recommended.
Power supply requirements:
High voltage 200-220VAC, need two groups, each group not less than 10MA
Silk lamp 6.3VAC-7VAC, need two groups, each group not less than 750MA
![](https://ae01.alicdn.com/kf/HTB1e8gooMmTBuNjy1Xbq6yMrVXaG.jpg)
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![](https://ae01.alicdn.com/kf/HTB1zPlEo7SWBuNjSszdq6zeSpXa1.jpg)
![](https://ae01.alicdn.com/kf/HTB1VNsDoMaTBuNjSszfq6xgfpXak.jpg)
![](https://ae01.alicdn.com/kf/HTB1DvkroFmWBuNjSspdq6zugXXa3.jpg)