johntayloruk
Member
Hi All, I’ve replaced the caps in my Jaguar (Using high quality Panasonic caps from Farnell). All seems fine functionally, but it’s now making a really loud “hissing” noise which is extremely annoying.
According to the console5 site, this is a known issue and according to their capacitor info it sounds like it’s related to C150.
[h=3]Capacitor note on C150[/h][FONT="]The schematic specifies that the 2200uF cap at C150 should be low impedance, and early Jaguar revisions follow suit. However, later revisions (Rev R, R/P) have a high-temp general purpose capacitor at C150, presumably to reduce the "Jaguar hiss" some consoles were noted for. The "hiss" is noise generated in the filter coil due to the high operating speeds of U38, and while it appears to be harmless, the noise can be quite loud and irritating.[/FONT]
[FONT="]As of 2016 we've switched from a low impedance cap, to a replacement cap with similar characteristics to the late-model parts. The additional impedance / ESR appears to dampen the effects from the regulator & coil and help tame the hiss.
What I’m a little confused by is how I can identify a 2200uf 10v capacitor that isn’t low impedance /ESR to use.
Does anyone here have any experience with this kind of issue and how to resolve?
Thanks,
John
[/FONT]
According to the console5 site, this is a known issue and according to their capacitor info it sounds like it’s related to C150.
[h=3]Capacitor note on C150[/h][FONT="]The schematic specifies that the 2200uF cap at C150 should be low impedance, and early Jaguar revisions follow suit. However, later revisions (Rev R, R/P) have a high-temp general purpose capacitor at C150, presumably to reduce the "Jaguar hiss" some consoles were noted for. The "hiss" is noise generated in the filter coil due to the high operating speeds of U38, and while it appears to be harmless, the noise can be quite loud and irritating.[/FONT]
[FONT="]As of 2016 we've switched from a low impedance cap, to a replacement cap with similar characteristics to the late-model parts. The additional impedance / ESR appears to dampen the effects from the regulator & coil and help tame the hiss.
What I’m a little confused by is how I can identify a 2200uf 10v capacitor that isn’t low impedance /ESR to use.
Does anyone here have any experience with this kind of issue and how to resolve?
Thanks,
John
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