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APPJ New mini vintage Tube Amp PA1501A

The PA1501A is the latest mini tube amp of APPJ in 2015. The design of the amp is new and unique.

The 6AD10 is a indirectly heated double pentode and this amplifier pentode was designed as an FM detector in television receivers in the old days. APPJ researched 6AD10, deveopled and specially designed the circuit as this stereo audio amplifier PA1501A. APPJ seriously tested and selected NOS 6AD10 in pair and provided with the amp. Now It is very easy to buy 6AD10 tubes for spare or replacement and the price is cheap.

There are two colors of chassis for options: Black and Silver
Universal input voltage: 100V-250V AC
No power cord and no interconnect cables included.
One year warranty

Technical information of 6AD10:
6AD10 @ The National Valve Museum
http://www.r-type.org/pdfs/6ab4.pdf

Spec of PA1501A:
Tube: NOS 6AD10 x2
Power Output: 3.5W+3.5W @ 8 ohms
Frequency Response: 30-40Khz (+/-1db)
Input Sensitivity: 500mV
Signal-to-Noise Ratio: -80dB / 3.5W
Residual Noise < 0.5mV AC
Input AC Voltage: 100-250V AC
Power Consumption: 38W
Input Impedance: 10K ohms
Output Impedance: 8/6/4 ohms (Z11-EI48*24 Output Transformers)
Dimensions: 160mm (w) x 134mm (d) x 125mm (h)
Weight: 2.5kg
Input: RCA Jacks
Output: Banana Jacks
AC: Standard IEC Jack with Fuse protection (2A Fuse)

Price: US$189 + shipping cost

Promotion: we now offer Furutech TF audio Fuse 20mm 2A at free with our PA1501A amp as spare for performance upgrade. The promotion peroid is upto 31, Dec., 2015.
TF Series Audio Fuse | FURUTECH
 

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The circuit of PA1501A is a new design. APPJ makes use of the advantages of the 6AD10 double pentode. The sound of PA1501A tends to be a wider and deeper sound stage and more bass than PA0803A.
Thanks.

I've enjoyed the original four tube S1 since it first came out. Looks like it's being produced again with the same tube compliment but in a different case. I wonder how it compares to your new two tube version?

I thought the S1 sounded better than my friend's N3.

PB220025.jpg
 
Re post 11 :

It was only the two capacitors associated with the mains rectifier, 82 µF 400 V.
Attention, size matters here, max length is about 25 mm / 1 inch.
For exchange it is necessary to remove not less that 20 different screws, 4 bolts
and 4 spacers ..

No other part was found to be defective.

This is a single ended amp. The output waveform is fair enough, and even good
compared to some other offers. Speaker outputs are grounded, not floating.