gainklone problems, maybe... - Page 5

cowanrg · 25th February 2003, 04:47 PM

well, not to confuse things, im only using one channel.

Steve Eddy · 25th February 2003, 04:51 PM

Quote:

Originally posted by Peter Daniel
It is fine, although as I remeber Stereophile review they noted that 170VA supply was a limiting factor to the amp.

Well, John THOUGHT it was the 170VA supply that was the limiting factor, but that notion was incorrect, as stated by Yoshi in the Manufacturers' Comments.

<i>According to Junji Kimura, the designer, the anomaly appearing in JA's measurements is to be expected when the Gaincard is fed a continuous waveform. It is due to the very small filter/capacitor of 1000uF rather than the Humpty power supply itself.</i>

se

Philo · 25th February 2003, 04:55 PM

When I first started testing my gainclone, I notice a light popping occasionally, I never found out what it was attributed to because I have changed out every component several times except the the chips, transformers, and bridge rectifiers. During that time the problem has gone away so.... <shrug> Try checking your solder joints, change out your interconnect and plug the amp into a different outlet. All things I have found to cause popping problems, mostly from shorts or bad connections.

cowanrg · 25th February 2003, 04:58 PM

ok. if you saw how it is hooked up, you would probably just look at me and point at it...

some of the wires are even just resting where they should be, not even terminated or soldered. its probably just that...

i threw this one together in less than 30 minutes, so its probably just got issues. i'm going to put together another one today that will be GOOD quality, and i'll do two of them.

Philo · 25th February 2003, 05:16 PM

Most likely that is the problem. You should always take the time to do the soldering for the signal path. You can save time by using crimp-on blade connectors for the PSU. I even use blade style auto fuses with these connectors.

25th February 2003, 04:55 PM	#43
Philo diyAudio Member Join Date: Jul 2002 Location: Ever sunny San Diego	When I first started testing my gainclone, I notice a light popping occasionally, I never found out what it was attributed to because I have changed out every component several times except the the chips, transformers, and bridge rectifiers. During that time the problem has gone away so.... <shrug> Try checking your solder joints, change out your interconnect and plug the amp into a different outlet. All things I have found to cause popping problems, mostly from shorts or bad connections. __________________ Philip "If you didn't make it with your own two hands, its not really yours".

25th February 2003, 05:16 PM	#45
Philo diyAudio Member Join Date: Jul 2002 Location: Ever sunny San Diego	Most likely that is the problem. You should always take the time to do the soldering for the signal path. You can save time by using crimp-on blade connectors for the PSU. I even use blade style auto fuses with these connectors. __________________ Philip "If you didn't make it with your own two hands, its not really yours".

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25th February 2003, 04:47 PM	#41
cowanrg diyAudio Member Join Date: Apr 2002 Location: Lafayette, CO	well, not to confuse things, im only using one channel.

25th February 2003, 04:58 PM	#44
cowanrg diyAudio Member Join Date: Apr 2002 Location: Lafayette, CO	ok. if you saw how it is hooked up, you would probably just look at me and point at it... some of the wires are even just resting where they should be, not even terminated or soldered. its probably just that... i threw this one together in less than 30 minutes, so its probably just got issues. i'm going to put together another one today that will be GOOD quality, and i'll do two of them.