Search found 319 matches

by sghioto
Fri Feb 06, 2015 4:23 pm
Forum: General Discussion
Topic: Conversion of motor driven door bell chime to electronic.
Replies: 17
Views: 10029

Re: Conversion of motor driven door bell chime to electronic

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
by sghioto
Wed Feb 04, 2015 5:06 pm
Forum: General Discussion
Topic: New (to me) CL220
Replies: 4
Views: 2941

Re: New (to me) CL220

Nice find! :grin: I could probably use some of those.

Steve G
by sghioto
Tue Jan 27, 2015 3:55 pm
Forum: General Discussion
Topic: WHo is the tube type technology guru here ?
Replies: 17
Views: 40098

Re: WHo is the tube type technology guru here ?

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
by sghioto
Fri Jan 23, 2015 11:52 am
Forum: General Discussion
Topic: WHo is the tube type technology guru here ?
Replies: 17
Views: 40098

Re: WHo is the tube type technology guru here ?

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...
by sghioto
Fri Jan 23, 2015 10:18 am
Forum: General Discussion
Topic: WHo is the tube type technology guru here ?
Replies: 17
Views: 40098

Re: WHo is the tube type technology guru here ?

That one from Antek should fill the bill at a nice price as well. :grin: 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
by sghioto
Thu Jan 22, 2015 9:19 am
Forum: General Discussion
Topic: WHo is the tube type technology guru here ?
Replies: 17
Views: 40098

Re: WHo is the tube type technology guru here ?

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

Steve G
by sghioto
Thu Jan 22, 2015 6:26 am
Forum: General Discussion
Topic: WHo is the tube type technology guru here ?
Replies: 17
Views: 40098

Re: WHo is the tube type technology guru here ?

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...
by sghioto
Sun Jan 18, 2015 4:57 pm
Forum: General Discussion
Topic: Hardwiring wireless speakers?
Replies: 23
Views: 128372

Re: Hardwiring wireless speakers?

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

Steve G
by sghioto
Mon Jan 05, 2015 4:36 pm
Forum: General Discussion
Topic: color organ help...
Replies: 39
Views: 17313

Re: color organ help...

OK I changed the code back to include the "pulsin" command for each LED and a few other changes to expand the frequency coverage for each band. This will allow multiple LEDs to come on at the same time. I have included a preamp circuit I use that will help as well. The preamp has a gain of about 20 ...
by sghioto
Sun Jan 04, 2015 6:03 pm
Forum: General Discussion
Topic: color organ help...
Replies: 39
Views: 17313

Re: color organ help...

it still does not seem to work as good as a analog type color organ
Well it won't because the "pulsin" command is reading the music at random. However with the proper level of input voltage you should get decent response on all four LEDs .

Steve G
by sghioto
Thu Jan 01, 2015 5:06 pm
Forum: General Discussion
Topic: color organ help...
Replies: 39
Views: 17313

Re: color organ help...

Dac, first of all download this new program. then try the test mode below. red: pulsin C.3, 1,w0 if w0 > 68 then high C.0 endif green: if w0 > 27 and w0 < 69 then high C.1 endif blue: if w0 > 11 and w0 < 27 then high C.2 endif yellow: if w0 < 12 and w0 > 1 then high C.4 endif pause 100 let pinsC = %...
by sghioto
Wed Dec 31, 2014 10:36 pm
Forum: General Discussion
Topic: color organ help...
Replies: 39
Views: 17313

Re: color organ help...

anything stronger would cause the audio to be badly distorted The pulsin command is actually better suited for square waves so any audio signal that's over driven or distorted should not make any difference. Go ahead and crank up the volume but do not exceed the value of power supply voltage. Happy...
by sghioto
Tue Dec 23, 2014 1:33 pm
Forum: General Discussion
Topic: i need help with a display issues with a old tuner
Replies: 18
Views: 7757

Re: i need help with a display issues with a old tuner

dac,

Did you check the 7.8 volts on the frequency counter chip? According to the data sheet the display module is a common cathode type with pin #1 connected to ground. The drive voltage is from that chip.

Steve G
by sghioto
Sat Dec 06, 2014 6:34 pm
Forum: General Discussion
Topic: Some help with guitar active controls OpAmp circuit
Replies: 5
Views: 2984

Re: Some help with guitar active controls OpAmp circuit

Your welcome, glad you found the problem :grin:

Steve G.
by sghioto
Fri Dec 05, 2014 6:16 am
Forum: General Discussion
Topic: Some help with guitar active controls OpAmp circuit
Replies: 5
Views: 2984

Re: Some help with guitar active controls OpAmp circuit

If it was clipping would I expect to hear serious distortion, as opposed to a complete fade/loss of output? Yes you would. Something else to consider, does it cut out regardless of where the controls are set? From the circuit description the gain is flat with the controls at midpoint. Should easily...