It's also worth double checking that all the zener diodes have the correct part number written on them.
Problem with Integration upgrade [resolved]
- Thread starter cpditter
- Start date
Good morning
I desoldered the ground jumper and the zener diode joints. That resulted in both readings at x now being 53-54v
My other reading:
still at 122 and 123v on the transistor pins and
Term 56 126v
Sorry I could not verify the values on the zener diodes without unsoldering them all...
I desoldered the ground jumper and the zener diode joints. That resulted in both readings at x now being 53-54v
My other reading:
still at 122 and 123v on the transistor pins and
Term 56 126v
Sorry I could not verify the values on the zener diodes without unsoldering them all...
cpditter said:
Both x pads being 53-54 is a good sign. That's half the zener stack on each channel. The voltage at the metal tab should be about 2x that.
What voltages do you get at OA and OB? Can you reflow the center leg of each MJE5731A and reheat both ends of each zener diode connected to OA and OB?
OA and OB are connected to the metal tab of the MJE5731A, so I'm not sure why you have a different voltage there. It may be that getting good probe contact on the metal tab is a bit of a problem in your case for some reason.
Either way you're OK to continue with the build.
-PB
Either way you're OK to continue with the build.
-PB
I'm glad to hear you got it up and running!
Hi:
I've now listened to my Reduction with the newly-added Integration upgrade for about two days...
What I'm hearing so far is this:
Overall noise floor is reduced...not that it was bad before but definitely very quiet now.
Gain is noticeably higher so I'm listening with the volume at a lower setting than previously...used to be a very dramatic difference between phono and a line source like my CD player...now that difference is much less.
Can't say I'm hearing a big difference in bass response per se...but, some of the lower end like kick drum seems tighter and just pops out of the mix better I feel.
Thanks again for the help on the build
I've now listened to my Reduction with the newly-added Integration upgrade for about two days...
What I'm hearing so far is this:
Overall noise floor is reduced...not that it was bad before but definitely very quiet now.
Gain is noticeably higher so I'm listening with the volume at a lower setting than previously...used to be a very dramatic difference between phono and a line source like my CD player...now that difference is much less.
Can't say I'm hearing a big difference in bass response per se...but, some of the lower end like kick drum seems tighter and just pops out of the mix better I feel.
Thanks again for the help on the build
