Daiwa PS-304

The Daiwa PS-304 has been with us now for at least 25 years…and most are still as reliable as ever.  A great design stands the test of time and guess what…Martin Lynch and Sons are now selling the MyDel PS-304 Mark II.

Specifications:

MyDel MP-304mkII

• Input Voltage:  230V  50Hz +/-2Hz
• Output Voltage:  DC 1.5V – 15V continuous
• Current Output (at 13.8V d.c.):  30A (max),  20A (15 minutes),  15A (continuous)  (NB lower max current at lower voltage, e.g. 17A at 10V d.c.)
• Load Regulation <= 1%
• Ripple:  <= 10mV
• Protection:  Current Limitation, Short Circuit
• Environmental: Temperature 0 deg C – 40 deg C, Humidity  <RH 80%, Atmospheric Pressure:  86Kpa – 104Kpa
• Dimensions:  300mm x 175mm x 160mm ( L x W x H)
• Weight:  9Kg

Frankly it looks identical to the original and other variants…except for the pretty colours.  About £100 new and half that second hand…or pre-loved or whatever you want to call it, they are a really good supply.  The only problem is, none of the schematics I can find show any protection for your rig if the pass transistors go short…they can do this, and 20A of 20+ volts into your £2,000, 13.8V pride and joy? The smoke will definitely escape from multiple orifices.

Buy one for sure…but fit a crowbar to it before the big bang.

Here are the other two for your viewing pleasure (apologies for the gap between the pictures – I’m working on that):

Daiwa PS-304 II

Standard PS-304