Electronic Components and Parts for Audiophiles, Ham
radio operators, experimenters and university physics departments. I
realize that this website isn't elegant, you don't have to tell me.
Cancel your own damn subscription!
PayPal Only, Keeps the book keeping simple. If you
need an invoice first, let me know.
NOTE: The
Kits of Parts are specified for ONE CHANNEL. If you need 2
Channels, you must ORDER 2 KITS
We are shipping "GR" grade 2SK170
and 2SJ74 until BL grade product is available from an OEM source!
All JFET devices are tested prior to shipment.
F4 Kit of Semiconductors
F4 Kit Bill of
Materials
Quantity
RefDesig
Description
2
Q3..Q8
IRFP240 and IRFP9240
Matched Triplet
1
Q1
2SK170 "N" JFET
(GR or BL)
1
Q2
2SJ74 "P" JFET
(GR or BL)
1
Q11
TL431 or PM431 Shunt
Reg
2
D1,D2
1N4736 Zener Diode
6
R16..R21
0.47Ω 5W source
resistors
4
C1..C4
220μF 35 or 50VDC Elna Silk
Electrolytic Cap
$62.00
F5 VISHAY KIT of
Semiconductors and Passive Components -- for One Channel (Order 2
for Stereo).
F5 Bill of Materials
NOTE CHANGES EFFECTIVE August 2011 -- The "R1
Edition" LINK
Quantity
RefDesig
Description
2
P1,P2
5K Bourns 3266W or 3296Trimpot
1
P3
200 Ohm Trimpot
1
R1
4.7K or 4.75K CMF55/RN55
1
R2
47.5K CMF55/RN55
2
R3,R4
10 Ohm 1W Panasonic ECG
4
R5,6,21,22
2.2K or 2.21K CMF55/RN55
2
R7,8
0.68R 3W Panasonic ECG
4
R9,10,11,12
100R 3W Panasonic ECG
4
R13,14,17,18
100Ω,
0.25W, RN55D
2
R15,16
1k CMF55/RN55D
2
R19,20
10K CMF55/RN55
2
TH1,TH2
4.7K Thermistor
1 set
Q1,Q2
2SK170 + 2SJ74 (may be GR or BL)
1
Q5
ZTX550 PNP Transistor (TO-92)
1
Q6
ZTX450 NPN Transistor (TO-92)
1
Q4
IRFP240pbf
1
Q3
IRFP9240pbF
$45.00
Premium Resistor Package
(Non Inductive)
Note -- these resistors must be
chassis mounted
2
R1,R2
10 Ohm 1% Caddock MP915
15 Watt TO-126
2
R5,R8
50 Ohm 1% Caddock
MP915 15 Watt TO-126
2
R11,R12
0.5 Ohm 1%Caddock
MP930 30 Watt TO-220
$26.00
No Boards for the PASS kits --
it's their IP -- but the above will help you put together these very
nice amplifiers.
F3 IRF/Lovoltech Parts Kit --
For a short time we can offer the following:
F3 Bill of Materials
Reference
Quantity
Description
C1
1
15,000 uF
C10
1
220uF/35V or 50V ELNA Silk
C2,C3,C4,C5,C6,C7
6
220uF/63V
C8
1
1uF Polypropylene or Polycarbonite
C9
1
33pF S.M.
D1
1
1N4001
LED1
1
Led BLUE
Q1
1
LU1014 Lovoltech
Q2,Q3,Q5
1
IRFP240 Matched Triplet
Q4
1
ZTX450 NPN Transistor
P1,P2
2
5K Bourns Trimpot
R1
1
9.09k 1/4 W
R2,R19
2
47.5K 1/4W
R3,R4,R8
3
2R 3W
R5
1
2.7R 3W
R6,R7
2
1R 3W
R9
1
0.47R, 3W
R10
1
100R 3W
R11,R21
2
100R 1W
R12,R22
2
10k 1/4W
R13
2
4.75K 1/4W
R14,R16,R17,R18
4
1.5K 1/4W
R15,R20
2
221R 1/4W
$72.00
Burning Amp 2 Semiconductors
ONLY -- ONE CHANNEL
Ref Des
Quantity
Description
Q201
1 Set
Matched 2SJ74
Q202
1
2SK170 or LSK170
Q203
1
IRF610
Q113
1
TL431 Marked PL431
D101,102
2
1N4739
Q101,3 etc
1 Set
Matched Triplet
IRFP240pbf
Q102,4 etc.
1
Set
Matched Triplet
IRFP9240pbf
$67.00
*Pass recommends 2 100 Ω 3
Watt resistors in parallel. We measured the dissipation of these
to be just over 3 Watts when the amplifier is running 25W into 8Ω
