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Doug G.

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About Doug G.

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    Rochester, MN

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  1. Doug G.

    First Large Advents

    As I stated on AK, the only discrepancy is the serial numbers and driver dates. The drivers are definitely later ones as the tweeters have the black tape only going part way across the Masonite and the stamped dates, of course. Earlier (pre 1975) ones have the tape going all the way across. So either somebody stuck newer drivers in older cabinets or the paperwork was missing and they found older examples to stick on there. Who knows? Also, as I said, the tweeter cone colors make no difference as long as the magnets are the same size. Another thing I just noticed - the glue holding the Masonite ring on on the one woofer is dark. Is it reddish? The usual was a light tan, mastic type glue. I have seen other examples with the red clue, however. Doug
  2. They look well-made and have gotten great customer reviews on Amazon. Doug
  3. Yeah, beautiful! And, you're not alone. I am re-restoring (I originally did it in the mid seventies) an old Hallicafters shortwave radio my late father-in-law had and I got when he passed away in 2015. Even though it needs several parts replaced, particularly the old paper capacitors (it's from the nineteen fifties), and needs to be realigned. I restored the appearance first. Doug
  4. If they are Advents with the metal plate for the crossovers, the caps are most likely 16uF. Those are very early units. Some research shows Advent may have originally used the `16uF/8uF combination in some of the early ones but it is unclear. Regardless, there were only 16uF and 8uF caps used in the original Advents so you would be safe buying some of each. It's not like they are expensive. Doug
  5. Just for reference, it should not be all black when you get inside. Doug
  6. In my post above, I indicated that the gray plastic trim pieces will always be gray. However, with age, they can discolor on the front edges and appear yellowish. This has happened to a couple of mine. I imagine sanding that edge may restore them but I haven't tried it yet. Doug
  7. After Advent started putting tweeters with the large magnet in the Smaller Advent, they may have been trying to zero in on the perfect values of capacitors and 1975 is when they made the magnet size change. It's kind of like when they were settling on the values for the original Advents. In any event, the 3 ohm resistor indicates the tweeters will have the large magnet. It was needed to tone down the tweeter a bit to match the woofer efficiency. The original Smaller Advent did that with the smaller magnet and only needed the 1 ohm resistor. Doug
  8. The New Advent and Advent/1, however, use the same woofer. The difference is the cabinet size. Also, the Masonite woofer and all-metal woofer would not be considered identical since the Masonite woofer has a bit longer excursion (Pete B. has measured them) but, in all practicality, they are the same. Same cone. Doug
  9. And sometimes, an Advent employee used a black marker but it means the same thing - positive connection. Doug
  10. Doug G.

    OLA's I Just Bought

    Yes, the optical illusion is common with the Masonite woofers where they look like the rolls are poking out when they are not. There are subtle clues to tell. Doug
  11. Doug G.

    OLA's I Just Bought

    Masonite ring woofers have inverted roll surrounds, all of them, or SHOULD have. The later all-metal woofers have standard mount with the roll poking out, or SHOULD have. The only way they get switched is if a subsequent owner changes them or a "professional" changes them. Doug
  12. Doug G.

    OLA's I Just Bought

    Yup, get 'em fixed up so they sound new. Those are probably from 1973 or so, with those serial numbers. Doug
  13. I am very sorry to hear of Carl's passing. Here it is almost two years ago and I didn't know. Doug
  14. The trim pieces around the inside edge were never gold plated. They have always been a light gray. Originally they were wood and the gray paint can come off and make them look like they were some other color. Later, the pieces are gray plastic and as such, will always be gray. The original finish on Advents was always a rubbed oil finish and satin. If you have seen a gloss finish, they have been redone. As ajfink stated, the surrounds being in upside down doesn't really hurt. There's just the chance the roll will rub on the Masonite edge. That's why advent put them in inverted. If you ever notice any fuzziness in the sound, that's what could be happening and they should be refoamed the correct way. Doug
  15. The change from fiberglass to foam happened in the latter days of original Advent production, in about 1975. I have some of each and they sound the same. I doubt, in spite of possibly a production cost reduction, Advent would have made the change if there were a audible difference between the two versions. Doug
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