Destroyer x Amplifier...Dx amp...my amplifier

[harmonicconverger]

i have a problem. all circuits are fitted right. no grounded traces. all components are working. but when i turned it on, with protective resistor, these are the following problems.

1. protective resistors get hot after a minute or two.
2. my power transistor gets hot too.
3. output measures some DC. around 3volts

i don't hook up any load yet and the input is grounded as the procedure says.

[AndrewT]

Power up via a bulb tester.
It will stop the devices becoming hot.
It will allow you to measure voltages without risk of the amp blowing up.
It will not prevent a slipped probe from blowing up the amplifier. The smoothing caps discharge through the accidental short and the magic smoke dissipates.

[harmonicconverger]

and one more thing. only A1943 is getting warmer but c5200 is cold. what is the problem? i check the voltage across the protective resistor and it reads 4.40v.

[harmonicconverger]

tight bass. pronounce mids and highs. DX amp is now working.

[blistard]

Originally Posted by harmonicconverger

tight bass. pronounce mids and highs. DX amp is now working.

What was the problem, and is it solved?

[harmonicconverger]

actually. it is now working. but it seems there are still problems like:

1.when i set my DMM to 200m and measure the output i have dc readings from hundreds then fluctuating slowly.

2. when i test the resistor protection i got my reading at 500+MV but when it is in the halfway, it reads 1400+MV.

now i don't know what to do.

[destroyer X]

Is it assembled below (beneath) your pcboard.. is it in the copper side?

Is this trimpot adjusting?... when you turn the trimpot knob or the adjustment screw, is the off set changing?

Mistakes.... this is what you have... do not desperate..go searching because this is normal to happens..... **** happens as you know...yeah...i have typed this symbol (*) was not forum automatic correction.

Everybody makes mistakes.... even the one says that does not make mistake is doing a mistake..and his mistake is to say this foolish that cannot make mistakes...we are humans...we fail... search for your mistake dear Harmonic.

By the way..is the bias trimpot operating?

How is the sonics?...if not astounding and awesome..then you have mistakes..... everybody loves that sonics.

regards,

Carlos

[harmonicconverger]

here is my reading in output terminal.

[destroyer X]

Off set is Direct current... milivolts in DC...what is your measurement... the flash spot is covering the scale so i cannot know what scale you are using.

regards,

Carlos

[harmonicconverger]

it was set to 200mV. and the reading was 4.7mV