so i just bought an electra analog delay (a table top unit from the 70's i think)
and its sounds fine for about 5 seconds when first turned on then the repeats get REALLY fuzzy and the longer delay times just whistle a bit.
beacuse this takes a few seconds to happen i imagine its caps, but do you think it would be power caps (the unit has a built in transformer)
or do you think its the bbd?
or something else! :(
thanks in advance!
Naa, if the bbd was fried it wouldn't work at all. I'd bet on the power supply.
My first inclination is the cap that might be smoothing the Vref. Many budget delays will use a single fixed Vref to provide the bias voltage as well as the Vref for the rest of the audio path. If Vref/Vbias drifts due to cap problems then sonic quality will drift as well, similar to what you'd get by tweaking a bias trimpot.
So, not quite power supply but sort of.
Three letters and a word "ESR Meter."
The Dick Smith kit is excellent and has saved me a world of diagnostic time.
Not having one, just start replacing electrolytic caps in the order of funkiest looking (bulges, leaks, etc.) highest voltage, whatever looks important.
Ron
cool thanks!
i was planning on just replacing caps, but then i read somewhere that bad bbds can cause this nasty fuzziness.
this thing sounds great for those couple seconds so im pretty psyched to get in back into shape!
Good luck with that Doug , I have an Ibanez AD150 that "howl's" and feeds back like crazy !
Need to get "de-buggin" also !
MM.