T&L Publications

Should be looked at as VA and not watts.

I think in this case since dac mentioned it was just a trivia question we can define it as a pure AC load with 100% efficiency.

Steve G

The one I listed from Digikey is 71mm between the mounting holes if that helps.

Steve G

120 volts X 1 amp = 120 watts
12.6 + 12.6 = 25.2 volts
120w / 25.2v = 4.76 amps

Steve G

This one is 75 mm long would that work?
http://www.digikey.com/product-detail/e ... ND/3534247

Steve G

Agree with dyarker.

Steve G.

the 555 should have some sort of clock adjustment to control speed of the chimes

R5 is the speed adjustment.

Steve G

A TLP222AF solid state relay will work for U1. From Digikey at only a dollar and eight cents. I don't see any current limiting resistors for the opto electronics. Since only one MOC3023 is on at a time a single 1.8K ( with a 12 volt supply) resistor from ground to the common connection of the LED ca...

Doesn't sound complicated at all. It's just a sequencer. Are you needing someone to build a circuit or looking for designs?

Steve G

Nice find! I could probably use some of those.

Steve G

If you can operate the 12AT7 heater on the 5 volt winding it will work. The 3.2 volt secondaries are rated at 6 amps total and that will just supply the four EL34 tubes. I would still go with the two Antek transformers. What's the big deal?

Steve G

Yep! But don't forget to supply voltage for semiconductor sections Oops! :roll: You could use a second transformer for the semiconductors. If I'm looking at the correct schematic a 52 volt ac winding is needed. The Antek AN-0124 unit with the windings in series should work and it's only ten dollars...

That one from Antek should fill the bill at a nice price as well. You'll need more then 4 amps just on the EL34s. Nominal heater current is 1.6 amps. Either parallel the windings or split the load between the two windings.

Steve G

dacflyer can you send us a link to the replacement transformer you're talking about?

Steve G

Power = Voltage * Current, whether it's tubes or transistors. If the transformer is rated at 120 watts and the voltage is 360 volts then the rated current is 120/360 or 333ma. The replacement transformer sounds about right as hakelsup mentioned. A 100 watt amp probably consumes around 120 watts at f...

Without a schematic I would try connecting at the volume controls.

Steve G