Machmat has been taken over by Triple M Audio Shop and moved to a new location in Rhenen, the Netherlands. We are now transferring all of our stock to the Triple M WWW-site, we hope to have this finished first half of 2011. All new additions will be added to the Triple M website only. Please note: The actual prices are noted on the Triple M audio shop website. Prices on the MachMat site may be used as reference only. If you have any questions, please mail us. Sorry for any inconvinience.

Solid State

• For modificatons I do in op-amp based equipment I also have some better sounding versions for sale. They are listed in the op-amps list.
• The voltage regulators list. These can be devided in fixed regulators, adjustable regulators, and both can be made for negative or positive voltages.
• I have selected some diodes, which are very suitable for audio. Very good for audio are the ultrafast recovery types, giving much less high frequency harmonics when switching, one of the main problems in solid state power supplies.
• I also have some strange old equipment parts. These might come in handy if you are repairing something, and just need that certain one and ponly part. I hope I can help you getting the old devices back to work!
• The list of other semi-conductor devices I have on stock. Mostly these are overstock over from large projects. SO most can be of good use in DIY audio..
• In some applications, the solid state electronics need a good heat sink. The heatsinks I have left over are here for sale.

Audio opamps

Type	Description	State	Brand	Number in stock	Price each (Euro)
OPA134PA	Single fet input op-amp. 8 pin DIL version (standaard pinned version). Very good sounding replacement in op-amp based equipment	NNP	Burr-Brown	36	2.90
OPA2134PA	Double fet input op-amp. 8 pin DIL version (standaard pinned version). Very good sounding replacement in op-amp based equipment	NNP	Burr-Brown	0	3.40
OPA604AP	Single fet input op-amp. 8 pin DIL version (standaard pinned version). Very good sounding replacement in op-amp based equipment	NNP	Burr-Brown	28	3.90
OPA2604AP	Double fet input op-amp. 8 pin DIL version (standaard pinned version). Very good sounding replacement in op-amp based equipment	NNP	Burr-Brown	42	5.60

Voltage regulators

Type	Description	State	Brand	Number in stock	Price each (Euro)
LM317T	1.5 to 37V/1.5A, TO220, positive adjustable voltage regulator, great for heater power supplies and current sources	NNP	???	300	9.95 for 10
LT1086CT	1.5 to 37V/1.5A, TO220, low drop adjustable positive voltage regulator, bend wires	NNP	LT	60	4.50
LM337SP	1.5 to 37V/1.5A, TO220, negative adjustable voltage regulator, great for heater power supplies and current sources	NNP	ST	180	8.75 for 10
L7805CV	+5V/1.5A, TO220, positive voltage regulator, short leads, but unused	NNP	ST	200	5.00 for 10
LM323KSTEEL	+5V/3A, TO3, positive voltage regulator	NNP	???	12	3.75
KA7812	+12V/1.5A, TO220, positive voltage regulator	NNP	Samsung	100	5.00 for 10
LT1086-12	+12V/1.5A, TO220, low drop positive voltage regulator	NNP	LT	16	3.20
L7815CV	+15V/1.5A, TO220, positive voltage regulator	NNP	Motorola	100	5.00 for 10
MC7824CT	+24V/1.5A, TO220, positive voltage regulator	NNP	ST	50	5.00 for 10

Diodes for tube audio

Type	Description	State	Brand	Number in stock	Price each (Euro)
1N4007	1000V / 1A diode, all purpose high voltage diode	NNP	???	986	1.50 for 10
1N5408	1000V / 3A diode, very nice and heavy all purpose high voltage diode	NNP	???	146	4.50 for 10
1N957B	6.8V, 400mW 5%, zener diode. Ideal for a simple voltage stabilisation at 6.3V!	NNP	National	750	0.15 for 10
BYT54M	1000V / 1.25A fast recovery diode. Glass round case, very good choice for high voltage rectification	NNP	Vishay	668	8.00 for 10
BYT56K	800V / 3A fast recovery diode. Glass round case, very good choice for high voltage rectification, bend leads	NNP	Vishay	396	8.00 for 10
BYV95C	600V / 1.5A fast soft recovery diode. Glass round case, very good choice for high voltage rectification	NNP	Philips	887	5.00 for 10
BYW29-150	150V / 8A ultra fast diode. TO220 case, very good choice for tube heating rectification	NNP	Vishay	365	6.00 for 8
BYW29-200	200V / 8A ultra fast diode. TO220 case, very good choice for tube heating rectification, sold per tube of 50 pcs	NNP	Vishay	15	25.00 (tube)
BF37-933L	600V / 10-35A bridge rectifier. Isolated chassis mount case. Ideal for heavy tube heater rectification. 29x29 mm square case, wire leads	NNP	Facon	175	2.75

Old equipment parts

Type	Description	State	Brand	Number in stock	Price each (Euro)
JBYI-1N23C	plug-in diode, gold connections	NOS	Microwave	1	3.50
1N23DR	screw mounted plug-in reversed diode, gold connections	USED	Sylvania	1	3.50
1N23E	plug-in diode, gold connections	NEW	Micrometrics	1	3.50
JAN-CBRZ-1N263	glass diode, gold connections	NEW	???	3	3.50
CV2154	diode, silver connections	NEW	???	1	3.50
CV2155	diode, silver connections	NEW	???	1	3.50
REL 673 T11	240.0 kHz Crystal, schwingquarz	NOS	Siemens	1	9.50
TEK 155 0217 00	16 pin DIL Tektronix special IC part, US 104 81T	NOS	Tektronix	3	7.50
ZA27013	Vibrator 6 volts dc, type NS6, ux4 socket	NOS	Wimbledon Eng. Co	2	12.50

Other semi-conductor parts

Type	Description	State	Brand	Number in stock	Price each (Euro)
2N6250	NPN, TO3, 275V/10A, power transistor	NNP	Motorola	50	1.50
BUV47	NPN, TOP3, 400V/9A, power transistor	NNP	???	25	2.20
CS8412-CS	Audio receiver, 28 pin SOIC	NNP	Crystal Semiconductors	10	14.50
LM293P	Low power low offset dual voltage comperator	NNP	National	200	2.50 for 10
MC34060AP	Precision switched mode pulse width modulator control circuit, great IC for switching power supplies	NNP	Motorola	40	1.50
MJE2955	PNP, TOP66, 70V/10A, power transistor	NNP	Motorola	100	0.70
MPSA29	NPN Dalington transistor, TO92, 100V/500mA	NNP	???	100	4.50 for 10
MPSA42	NPN, TO92, 300V/500mA, high voltage transistor. Very good for switching nixie tubes	NNP	???	100	4.50 for 10
MPSA44	NPN, TO92, 400V/300mA, high voltage transistor. Very good for switching nixie tubes	NNP	???	100	4.50 for 10
MPSA92	PNP, TO92, 300V/500mA, high voltage transistor. Very good for high voltage current source loading on tubes	NNP	???	100	4.50 for 10

Heatsinks

Type	Description	State	Brand	Number in stock	Price each (Euro)
Clip-on heatsink	Small clip-on heatsink for TO-220 devices. Very easy to mount, about 30°C/W cooling power	NNP	??? Picture	250	5.00 for 10
SK75 25 SA 220	Small size heatsink for TO-220 devices. Great for voltage regulators. About 20°C/W cooling power	NNP	??? Picture	300	4.00 for 4