Author Topic: DS-5 output voltage? (Read 168 times)

basso · « **on:** June 11, 2004, 01:52:14 AM »

Hi,if someone is using a DS-5 240v version could you please measure the output voltage on pins 4 and 5 and let me know what you have,pin 1 is 0v,so measure across pin 1 and then pin 4, and then pin 1 and then pin 5,not everyone knows how to do this!!and i don't want people saying they blew up the DS-5!!i'm getting some humming recently with my DS-5,iv'e changed the electrolytic caps but the hum is still present,so if i can be sure of the output i can try and find a new transformer here in the UK,the voltage rectifier is ok,they either work or don't!!thanks in advance for your help,Julian.

effclef · « **Reply #1 on:** June 11, 2004, 02:35:21 PM »

Julian, I hope Mica or someone else at the factory speaks up with advice.

My guess would be that the transformer is NOT the issue, if hum is the only problem.

Did you change the caps to ones with at least the same voltage and capacity (uF) rating?

Rectifiers DO go bad. It has four diodes inside and one could be open or shorted. You should also check the cable connections, and the cable from end to end to make sure the shield is still making contact...

But I'll bet a cookie it is not the transformer.

Good luck - you will find it.

EffClef

dnburgess · « **Reply #2 on:** June 11, 2004, 03:04:17 PM »

I presume you've checked the bass without the transformer and its ok?

basso · « **Reply #3 on:** June 11, 2004, 05:11:29 PM »

Hi Effclef,yes the caps i installed are rated at 40v,the original rated at 25v,i made a new cable with new neutrik connectors,all is fine there,it's not the bass,i will get a new rectifier and see what that does,the output is 20v on pin4 and 5,it's always been that output,but i would like someone else to check their DS-5 and see what voltage they get,but i think as mine is a 240v DS-5 it may have a higher output then a 120v version,thanks for your help,Julian.

mica · « **Reply #4 on:** June 11, 2004, 06:15:37 PM »

20V-22V is expected output voltage, and it's the same for all the transformers.

My dad is skeptical about the transformer being the culprit for your hum. He suggested plugging your bass to the DS-5 with the 5-pin cable and then plugging a stereo cable into your 1/4 jack (and not connected to anything on the other end). This will use the 5-pin for your signal, and the internal batteries for the power. You can even disconnect the mains on the power supply at this point.

See if the hum persists. The purpose is to isolate the hum to the DS-5 or the cable/bass.

If what you are describing is truly 60Hz hum, then it may be as simple as adjusting the hum balance controls on the bass. If it isn't 60Hz hum, can you describe what you're hearing in more detail?

Also, it will be helpful to know if the hum is the same in both pickups, and if it is directional.

Have you tested with the 1/4 alone to confirm that there is no hum when you use that output?

basso · « **Reply #5 on:** June 12, 2004, 04:02:49 AM »

Done all the tests Mica,tranny still humming?but now i know what the output voltage should be i can look around for a suitable replacement should i need it,many thanks for you help and advice,Julian.