View Full Version : Strange ebay review
spendorman
18-04-2012, 18:50
Seems to talk some sense, but also a fair bit of nonsense. Perhaps it's been translated:
http://reviews.ebay.com/Rogers-LS3-5A-Goodmans-Maxim-Minimus-1-Ditton-10-etc?ugid=10000000010832278
Reid Malenfant
18-04-2012, 19:01
Some howlers on that page :lol: Apparently Quad 405 & 405/2 are 5W in class A :rolleyes:
Yeah right - NOT! :rfl:
StanleyB
19-04-2012, 06:59
How many Watts does the Class A stage deliver in the Quad then? I know that the class B stage delivers 100W, but can't find the max power output of the class A stage.
Reid Malenfant
19-04-2012, 16:22
The class A stage is taken from the driver & consists of a 47 ohm resistor. The driver also feeds the current dumping transistors. A simple calculation shows that 5W of class A power would require over 50V to be dropped accross the 47 ohm resistor.
As it looks to be rated at about 1W maximum I can't see it somehow :eyebrows:
StanleyB
19-04-2012, 16:32
I sold my 405 boards around Christmas on eBay (at a healthy profit), so I can't confirm if those resistors are 1 Watt or not. But I remember that much was made of the class A capability of the 405 in articles published in Wireless World.
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