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In Reply to: RE: late night Heath AS-10 pictorial posted by Awe-d-o-file on February 28, 2014 at 06:17:29
unless a component is hard bad I rarely toss parts as my work bench dump pile will attest to!
I was looking at the PE catalog after posting last night looking at caps, resistors and pots and a cap bypass question came to mind bearing in mind this would be the 1st xo I've bypassed. And that is, if I want to place a bypass cap into the xo should I make equivalent adjustments to cap values so tweeters see the original design value, correct?I'm actually surprised by how good these tweeters sound. I really like Atomic Rooster's "in the hearing of" for tweeter evaluations and I like what I hear. Not great, but not too shabby either! Definitely we could have a short term relationship though.
In keeping with original design, any pot recommendations[insert your own funny here]?
"the only thing necessary for evil to succeed is for good men to do nothing"
Follow Ups:
Looking at the crossover, it looks like the pot is being used as a rheostat, not an 'L' pad. It adjusts the tweeter level by inserting more and more resistance in series with the tweeter, and of course, that also shifts the 'crossover' frequency a lot, as well. With that in mind, I don't think adding a small bypass cap will need any value compensation (the original cap is probably at least 10% tolerance, anyway).
but is my assessment correct in that if oem is 3mfd and I want to bypass staying true to original I'd use a 2.7 plus bypass of .3?
these rheostats should probably be replaced given they're approximately 50 years old. I figure I'd just build replacement XOs and use them externally.
"the only thing necessary for evil to succeed is for good men to do nothing"
I buy Mills resistors from Sonicraft and find there prices and shipping lower than most others. They also run a 20% off annually. This sale is on now.
ET
I bought Huntingtons from Digikey and those are pretty good as well..I hear you on Sonic craft..Excellent products and prices.
Honest amplification is better than 2nd order distortion anytime.
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