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Re: AC TO DC
What is the maximum current you will require from the circuit?
Does it have to be regulated or just filtered to a small ripple value?
Transformerless circuit are generally only for low current uses and are not very safe unless carefully constructed and utilize components that...
Easy as pie.
Just use a SPDT switch for the first (forward direction) switch.
Wire the hot power wire to the common contact of this first switch. Wire the forward motor wire to the normally open (on) contacts. Wire the other closed (off) contact to one of the contacts of the second (reverse...
1) A linear power supply regulates by dissipating the difference of input voltage Vs desired regulated voltage by voltage drop across the series pass transistor, dissipated as heat. Simple and effective but not efficient. A SMPS uses a switching transistor that is either full on or full off...
I believe almost all modern alternators have 3 built in high current diodes inside them to convert the AC voltage generated be the alternator windings to pulsating DC voltage. You would have to modify the unit by removing the diodes. Then you would have to run 3-phase wiring from the alternator...
I think your post is mixing up two different things.
A switching power supply will generate less heat then a linear power supply simply because it's more efficient.
A tube power amp circuit will generate the same amount of heat no matter what kind of power supply is generating the voltage...
Re: DTL Logic familiy
The first popular DTL series was from the mid to late 1960s, called the 930 series.
Here is a link where they discuss and show some of the basic gates that were avalible. I suspect one could purchase some from surplus dealers or E-bay.
**broken link removed**
Lefty
Re: how to measure the resistance value of power transistor
You can only calculate the device resistance in circuit while operating. You CAN measure the voltage drop across the drain/source and measure the current and then calculate device resistance.
Re: GND vs Neutral
The term 'neutral' is usually used in AC wiring. The neutral (standard is white colored), along with the AC hot wire (normal black colored), actual carries the normal load current where the ground wire carries no current except in the case of a fault or short circuit...
marantz dc at output of one channel
In these vintage DC amplifiers there are usually two adjustment pots for each channel (four in all). One sets the no signal idle current, usually around 20-50ma and the other adjusts the DC offset to zero volts. If the offset adjustment drifts then it can...
crystal inplace of resonator
A crystal is one specific kind of resonator made from quartz. However not all resonators are crystals, there are for example ceramic and mechanical resonators.
Lefty
Did you look at the link that radiotech posted above?
**broken link removed**
Seems to be the same function as your request, except multi-color. Probably much cheaper to make yourself, but as you said your time is busy :D
Lefty
Many factors. Total gain, circuit noise, frequency range and flatness, output and input impedance match to the load device and source signal.
Complex topic and total characterization of an amplifier is not an easy task.
Lefty
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