Just a stupid question regarding this amplifiers (SAP15P/15N) and yes I had a good look in the forum and couldn't find an answer...
All this amps share the same amplifier board with the "infamous" and now obsolete Darlington and my question is:
Is there any advantage in replacing the 8 crap 2200uf capacitor in the filter bank for say 2 10000uf Nichicon ones ?
Any drawbacks in doing it ?
Thanks in advance for any advice
All this amps share the same amplifier board with the "infamous" and now obsolete Darlington and my question is:
Is there any advantage in replacing the 8 crap 2200uf capacitor in the filter bank for say 2 10000uf Nichicon ones ?
Any drawbacks in doing it ?
Thanks in advance for any advice
If it's old but still working ok it isn't really necessary, but if you are going to keep it for a long time,
new caps could prevent a future failure, and they might sound better too. Just be careful to not
damage the pcb in the process. The old snap-in caps can be tricky to remove.
new caps could prevent a future failure, and they might sound better too. Just be careful to not
damage the pcb in the process. The old snap-in caps can be tricky to remove.
Hi rayma
Actually I got one A500 (another one) from the *bay for a song and remembered I have one amplifiers board just laying around without the caps (were leaking and some dry) and no output Darlingtons (fried).
Anyway long story shorten I was given a Pioneer home cinema with a faulty digital board and loads of STD03n/p (7.1 amplifier) and was thinking in having a play with the Cambridge amplifier.
Ps: *bay amp up and running.
Actually I got one A500 (another one) from the *bay for a song and remembered I have one amplifiers board just laying around without the caps (were leaking and some dry) and no output Darlingtons (fried).
Anyway long story shorten I was given a Pioneer home cinema with a faulty digital board and loads of STD03n/p (7.1 amplifier) and was thinking in having a play with the Cambridge amplifier.
Ps: *bay amp up and running.
Sound like you are pretty good at sorting out these things, so just go with your gut on this.
Old high ESR power supply caps can thin out the bass, even if they're not leaking.
Old high ESR power supply caps can thin out the bass, even if they're not leaking.
You are right I lost count on the number of Cambridge amps I repaired (specially A series).
I removed and tested all 8 caps and all had ESR between 0.15 and 0.20 that for this type of capacitor is not bad (cheap Chinese ones).
If i have time tomorrow I take a picture of the "upgrades" I'm planning for this board.
I removed and tested all 8 caps and all had ESR between 0.15 and 0.20 that for this type of capacitor is not bad (cheap Chinese ones).
If i have time tomorrow I take a picture of the "upgrades" I'm planning for this board.
Had a bit of a play with the extra board today
Missing bits:
Capacitors (8 x 2200uf) - replaced with 2 x 10000uf
Trimpots 2 x 100Ohm - need to order
2 sets of Sap15N/P (to be replaced with STD03N/P - have them available (x14)
4 x 0.22Ohm x 5W resistors - need to order
Didn't realized the STD03 were much smaller then the SAP15 (have to extend the legs)
To be continued...
Missing bits:
Capacitors (8 x 2200uf) - replaced with 2 x 10000uf
Trimpots 2 x 100Ohm - need to order
2 sets of Sap15N/P (to be replaced with STD03N/P - have them available (x14)
4 x 0.22Ohm x 5W resistors - need to order
Didn't realized the STD03 were much smaller then the SAP15 (have to extend the legs)
To be continued...