1pair PNP A1216-JLH1969 single-ended Class A rear stage finished board

 

Details：

This is a very good small Class A power amplifier with excellent dynamic range, excellent low frequency response and flexible low frequency response.

(This price is for 2 channel board)

 

PCB size: 75X50X1.6MM, 1OZ copper.

Recommended input voltage: DC25V for single unit

Transformer power over 80VA.

Output power 10W+10W (4Ohm).

 

Highlights:

1, mono structure, convenient for players to use the left and right cooling type chassis installation, in order to get better heat dissipation, if the optional HPOO power supply ZERO-ZONE specially made for this purpose, completely easy to get a double single independent channel, the physical 100% separation of the left and right.

 

2, considering only to do the post-amplifier, this version does not add to the increase in electronic filtering, can strengthen the dynamic.

 

3, TB on the only one input coupling capacitor straight on the Nichicon MUSE BP 47UF large coupling capacity, no serious research, hands-on enthusiasts will certainly spray, with such a large, this sound no that sound no; when on this capacitor, will overturn your view of JLH1969 and 47U coupling, you will find no capacitor will be more compatible with this circuit.

 

4, TB only output coupling capacitor straight on the Nichicon KG II gear 3300UF, this capacitor can be a perfect match with the input capacitor.

 

5、Feedback and bootstrap capacitors use ELNA CERAFINE, to have the dynamics and strength, these two capacitors must be on ELNA CERAFINE, and also must be new (Thailand installed), can not be early red leather installed.

 

6, in order to make it easier to listen to the ear, the feedback resistance to AB carbon film, while also adding low R-value AB carbon film in the input stage

 

7, input-level transistor options are very important, we prefer Toshiba C2240BL file

 

8, the power of the end of the tube directly on the three Ken 2SA1216.

 

PS: This is the debugging of the finished board, the default debugging conditions for 24VDC, 1A electrostatic state current.

 

    It is recommended that the main filter capacity is not less than 15000UF, otherwise the low frequency is very affected.

 

    Rectifier bridge stack is recommended to use the chassis bottom plate to do heat dissipation.

 

Note: The heat of Class A amps can be very high. Please install a large heat sink to each board before power on (recommended heat sink size: 246X30X90mm (at 1A).

 

Package：

1pair PNP A1216-JLH1969 single-ended Class A rear stage finished board.


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Shippment:
We provide free shipping to international via China Post Airmail. We can also ship by TNT/EMS/DHL/FedEx for alternative shipping method for corresponding fees. Please let us know before payment if you need split shipment.

Returns & Replacements & Repair:
We accept returns & replacements within 30 days from the day the customer receive the products, please make first contact within 30 days from receiving the order. Products should be returned in original condition. As a benefit to our customers, we also provide repair within 3 months from the day when this item is shipped out, after repair is done, we will send you the item, but the customer should pay both shipping ways.

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