| IMPASSE Balanced Preamplifier Kits
A Portion of the proceeds from these sales is given
to DIYAUDIO for its maintenance and upkeep! |
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Reference |
Quantity |
Description |
Note |
|
C1 |
2 |
Not used |
See Text |
|
C2,5 |
4 |
100nF 630V Polypropylene |
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C3,C4 |
4 |
470nF 400V Polypropylene |
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D1,D2 |
4 |
Red LED, 1.7V Drop |
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NE1 |
2 |
NE2 Neon Lamp |
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P1 |
1 |
100K ALPS Dual Audio Taper |
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PCB |
1 |
Printed Circuit Board |
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Q1,2 |
4 |
DN2540N5 Depletion MOSFET |
Inserted! |
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R1 |
2 |
18K 1/4W Metal Film |
See Text |
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R11,12 |
4 |
15K 1W Matched to 0.1% |
2 pairs |
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R2,9,13,14 |
8 |
1M 1/4W CMF55 Metal Film |
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R3,10 |
4 |
1K 1/4W CMF55 Metal Film |
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R4 |
2 |
12k5 2W Wirewound or Film |
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R5 |
2 |
300R 1/4W CMF55 Metal Film |
Inserted! |
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R5a |
2 |
2.7K 1/4W CMF55 Metal Film |
Inserted! |
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R6,7 |
4 |
120R 1/4W Metal Film |
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R8 |
2 |
680K 1W Metal Film |
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S1 |
1 |
2 Pole, 5 Position Selector Switch |
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Misc |
6 |
Molex 0.100 Inch Pin Headers |
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Misc |
4 |
Nylon Spacers with nuts |
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Misc |
2 |
Tube Sockets |
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Depletion MOSFETs are inserted and
adjusted for balanced current on each channel. |
$105.00 |
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| Options: |
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Option A |
1 |
Eliminate 100K ALPS Potentiometer |
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and Selector Switch |
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$87.50 |
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Option B |
2 |
Add Cinemag CMLI-15/15 |
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$200.00 |
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Option C |
1 |
Assembled and Tested Impasse |
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Includes Cinemag Transformers |
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ElectroHarmonix 6SN7 + E88C/6922 |
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and C1 (if needed) |
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Option C purchasers will receive performance
verification from my Audio Precision Analyzer. |
$325.00 |
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| Basic Impasse Preamp and
Power Supply Printed Circuit Boards: |
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| Impasse Printed Circuit Board |
$15.00 |
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| Impasse PCB with Depletion
MOSFETs adjusted to 8mA |
$32.00 |
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| Impasse Power Supply Materials: |
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| Impasse Maida Power Supply Printed Circuit Board |
$12.00 |
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Impasse Maida Power Supply Printed Circuit Board --
Assembled and
Tested
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Reference |
Quantity |
Description |
Note |
|
C101,2 |
1 |
1uF 630 V Polypropylene |
|
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C102,3 |
2 |
100uF 450V Electrolytic |
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C104 |
1 |
47u 100V Electrolytic |
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C106,7,8 |
3 |
0.01uF 1kV Ceramic Disc |
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C109 |
1 |
10uF 100V Electrolytic |
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D101,2,4,5 |
4 |
UF4007 Rectifier |
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D103 |
1 |
12V Zener Diode |
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PCB |
1 |
Printed Circuit Board |
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Q101 |
1 |
TIP50A or equiv. transistor |
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R101,2 |
2 |
47R 1/2W Metal Film |
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R103 |
1 |
470R 3W Panasonic ERG |
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R104 |
1 |
1K 3W Panasonic ERG |
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R105 |
1 |
20K 1W Panasonic ECG |
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R106 |
1 |
100R 1W PanasonicECG |
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R107 |
1 |
47R 1W Panasonic ERG |
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R108a |
1 |
20K 3W Panasonic ECG |
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R108b |
1 |
36K 3W Panasonic ECG |
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R109 |
1 |
200R 1W Panasonic ECG |
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R110 |
1 |
4R7 1W Panasonic ECG |
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R111 |
1 |
270K 1W Vishay PPC |
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R112 |
1 |
47K 1W Panasonic ECG |
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IC1 |
1 |
LM317 Voltage Regulator |
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Misc |
4 |
Nylon Standoff, Heatsink etc. |
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$78.00 |
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| Impasse Maida Power Supply
Printed Circuit Board -- Assembled, Tested with Filtered, Fused Power
Entry Module (PEM) and Transformer * |
$160.00 |
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| * Given the weight of the transformer
and other materials, you will be invoiced for additional shipping
charges (if any). |
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