Atom BR Version PNP A1943 JLH1969 Single ended Class A power font b amplifier b font
Click to see details
Atom BR Version PNP A1943 JLH1969 Single ended Class A power font b amplifier b font

Atom BR Version PNP A1943-JLH1969 Single-ended Class A power amplifier DIY kit (2-channel)

80 % of buyers enjoyed this product!
Availability: in stock
Price:  US $32.89 / piece
from AliExpress
45 days Money back 45 days Money back Returns accepted if product not as described, buyer pays return shipping; or keep the product & agree refund with seller.
On-time Delivery On-time Delivery
Guarantees: On-time Delivery 60 days

Sort By

Top-rated Seller


JLH1969 Circuit we all know that it is known, it is an old and familiar players, and beginners want to play the circuit; however, throughout most of the kit is mostly limited material price from a few dollars to tens of dollars, an important component also uses non-audio output capacitance, really. . . .
Which led to huge multi-player spends a great effort to do JLH1969 after they come to such a conclusion, no dynamic, no frequencies. . . . . Seems, is listening to a “voice”

Atom -JLH1969 features:
1, Mono structure, easy to use the player for about chassis cooling installation to obtain a better cooling effect, if the optional ZERO-ZONE specially made HPOO power, easily get completely independent channel dual mono, the rationale was around 100% on separation.

2, Taking into account only to do post-amplifier, this version is not superfluous to increase electronic filtering, can enhance the dynamic.

3, On the Internet using only one input coupling capacitor Nichicon MUSE BP 47UF large coupling capacitance, did not seriously studied, real fucked Shaoyou certainly sprayed with so much, the sound does not sound that no; when on the after the capacitance, will subvert your view of JLH1969 and 47U coupled, you will find no more matches this capacitor circuit.

4, Internet use only one output coupling capacitors Nichicon KG II file 3300uF, this capacitance with the input capacitance of a perfect match.

5, The feedback and the bootstrap capacitor using ELNA CERAFINE, in order to have a dynamic and intensity, the two capacitors must be on ELNA CERAFINE, but had to be newly installed (Thailand loading), it can not be an early red leather.

6, In order to make more sense of hearing ear, the feedback resistor switch AB carbon, while also joined AB input stage low carbon R value

7, The input stage transistor matching is very important, we prefer Toshiba C2240BL

8. Power tube use (Toshiba) 2SA1943 end of the tube, highlighting the sweet voice of the people.

NOTE: This a kit, All parts need you welding and testing.

The above ingredients is the series version of the school sound program with PCB magic players can also change according to the above scheme.

PS: When the pushing 6 ohm speakers, it is recommended not less than 1A current, 4-ohm speakers, it is recommended not less than 2A quiescent current, it is recommended to use a single 24V DC voltage.
The main filtering capacity of not less than 15000uF, otherwise low frequency will be affected. Bridge rectifier is recommended to do the chassis floor cooling.

Mono heat sink recommends no less than 246 * 30 * 90 (1A time)

PCB Size: 75mm*50mm

Average Star Rating:
0 out of 5 (0 Ratings)
Name Rating Feedback
Shipping Company Shipping Cost Estimated Delivery Time
DHL 3 - 7 days
UPS Expedited 3 - 7 days
EMS 5 - 14 days
Post Air Mail Free Shipping 15 - 45 days
Return Policy If the product you receive is not as described or low quality, the seller promises that you may return it before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe) and receive a full refund. The return shipping fee will be paid by you. Or, you can choose to keep the product and agree the refund amount directly with the seller.

N.B.: If the seller provides the "Longer Protection" service on this product, you may ask for refund up to 15 days after order completion.
Seller Service On-time DeliveryIf you do not receive your purchase within 60 days, you can ask for a full refund before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe).

Most Popular from Category

Price:  US $32.89 / piece
from AliExpress
Best cheapest electronics store.