This is completely normal. All amplifiers do this, only reason you dont hear it on more modern amplifiers is due to the delay relay for the speakers.
Don't bother with it, iots is completely fully normal, as it has a transfoemer output, it cannot damage your speaker no matter how hard it tries.
But why even use an old shitty amp like this ? The design havent been used for 40-50 years and is worse than even the the worst nofi of today.
You could build a better amp using the transistors from this one, assuming the outputs are not germanium as those are a bit special.
Just pick one of all the topologies posted on this forum.
But why even use an old shitty amp like this ? The design havent been used for 40-50 years and is worse than even the the worst nofi of today.
You could build a better amp using the transistors from this one, assuming the outputs are not germanium as those are a bit special.
Just pick one of all the topologies posted on this forum.
No. But this is mostly usual, if there are no relais contacts for the speakers in the signal way, that switched on the speakers with several seconds delaying.
But there are amp designs without speaker relay contact and nevertheless without pops or similar effects while switch on. The NAD 3240PE is an example therefore.
There are also designs, where the serial voltage regulator BjT's does this job. In the voltage regulators of the amp models LK-2, LK-280 (LK2-80) and Klout from Linn is implemented the function, that is usually present by the protector unit TA7317 from Toshiba. Schematic I have posted here anywhere.
To the resistor network between the voltage rails and the base connection of Q302 it must be introduce an additional resistor and electrolytic capacitor referenced to the positive or the negative rail. By similar amps like this I have this realized in two or three cases. Unfortunately this was for a too long time, thus I cannot give you the exactly circuit instructions.
If you have find out the right way, please note additional, that while switch on and switch off the volume control position must be at zero (resp. minimum gain).
With which loudspeakers have you heard this amp model "SSA-100M" about the follow URL ??
http://www.avzone.co.in/Medium-Power-PA-Amplifiers.php
According the schematic diagram from post #1 this could be a very fine sounded amp. Various first solid state amplifiers from that time are very good sounded devices - go to
http://www.diyaudio.com/forums/soli...io-amplifier-components-want.html#post2173201
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I've never heard a good sounding ss amp with a output transformer, however i have heard good sounding amplifiers with a output capacitor similar to the DX trust.
Some old McIntoshes like the 2105 really aren't that bad at all! Actually, still very listenable.
vac
You can try using an NTC CL-60 thermistor between the bridge rectifier and the capacitor C701. This will prevent the inrush current in the powered up.
i am sorry to say hat the things you posted are not accurate and very narrow minded ...
Saying :""All amplifiers do this"" is not correct and has to be replaced with ""all amplifiers that dont feature a CCS on the ltp ""
Guys .... !!! come on ..... during start up and power down ltp goes out of balance ... this will result some amount of offset in the output that the listener will listen as a big boop ...
in a design like that nothing will prevent that
---- its not an arc from the mains switch
---- it has nothing to do with inrush current
---- i has nothing to do with regulation also ...
the only way to solve it is to put a relay with some delay or offset detect that will wait until the amplifier stabilizes...also has to have very quick disconnect at power down or power loss ...
in a design like that nothing will prevent that
---- its not an arc from the mains switch
---- it has nothing to do with inrush current
---- i has nothing to do with regulation also ...
the only way to solve it is to put a relay with some delay or offset detect that will wait until the amplifier stabilizes...also has to have very quick disconnect at power down or power loss ...
This one, works for me, when i fiddle with chip amp's, line stages an soo!
Usually, i make my preamp, power on the poweramp, on the same switch.
Then i place the Velleman P4700 at the output of the poweramp, and voila... both pops, and click's from preamp and poweramp is removed, and no one accentdently turns off the preamp, when the poweramp is on 😎
http://www.google.dk/url?sa=t&source=web&cd=1&ved=0CCQQFjAA&url=http%3A%2F%2Fwww.velleman.eu%2Fdownloads%2F0%2Fillustrated%2Fillustrated_assembly_manual_k4700_rev1.pdf&ei=YOueTruDNovs-gbFtcSDDQ&usg=AFQjCNE0CZVKLkk5igdlUaSJVjxPID4PsQ
Jesper.
Usually, i make my preamp, power on the poweramp, on the same switch.
Then i place the Velleman P4700 at the output of the poweramp, and voila... both pops, and click's from preamp and poweramp is removed, and no one accentdently turns off the preamp, when the poweramp is on 😎
http://www.google.dk/url?sa=t&source=web&cd=1&ved=0CCQQFjAA&url=http%3A%2F%2Fwww.velleman.eu%2Fdownloads%2F0%2Fillustrated%2Fillustrated_assembly_manual_k4700_rev1.pdf&ei=YOueTruDNovs-gbFtcSDDQ&usg=AFQjCNE0CZVKLkk5igdlUaSJVjxPID4PsQ
Jesper.
I built a P3A several years ago: Class AB amplifier - YouTube
I have no idea how this circuit manages not to do the turn on/off pop as the only way i know of is making the input and feedback cap the same size or use a jfet ltp.
I have no idea how this circuit manages not to do the turn on/off pop as the only way i know of is making the input and feedback cap the same size or use a jfet ltp.
Then you must make an audible check by this amp topology:
http://www.diyaudio.com/forums/solid-state/42259-zero-feedback-impedance-amplifiers.html
yes, this is also a source for unwanted audible effects while switch-on (and switch-off).
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