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About Davecv41

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    Little Rock
  • My System
    Recapped 1967 KCWRs, 2 HWOs, 1 HBR for center, homemade Glass Audio 45 amp, Sony TA-E1000 ESD preamp, Denon DP-62L turntable, Nakamichi RX-505 cassette, DBX TX-3 tuner, Sirius XM receiver, whatever fits cables. Project Dynaco FM-3 tuner, 300B amp

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  1. The SUBWOOFER section has a pinned post for hum problems that was started by @jason str
  2. Simple, and looks good, too. It looks even better without the quonset hut on top. I don't think I've seen two diodes in the rectifier plate circuit before.
  3. I'm still furloughed under the pandemic excuse. It sux. Those 3E boards look to have some potential, especially the 3 channel. I'm not reluctant to ordering a switching power supply, but I'm wondering what current the TI 3255 board needs? I've got a NOS Stancor 24VCT 4Amp transformer that I was wondering about making into a linear supply.
  4. Mine's still in the box, ordered before the infamous Class D thread disappeared a couple years ago. I'm interested in all the tweaks you're installing, please describe them as you progress with the build.
  5. I haven't seen the fuse question answered yet. The crossover schematic shows two, including one in the woofer circuit. What do they measure?
  6. Don't touch the woofer with a soldering iron. Instead, disconnect the wiring somewhere between the woofer and the crossover. Then take a resistance reading of the woofer there.
  7. I also bought an Academy, mostly because it was magnetically shielded. The Heresy I had used for a center was messing up my TV. The Academy didn't work for me, and I sold it to a forum member, who sent me a great looking Klipsch shirt in return. I ended up buying a single Belle, which is beautiful and sounds great between the Khorns. Thankfully, the flat screen TVs don't suffer from magnetic problems the way the older CRTs do.
  8. Something that sounds as close to the left and right La Scalas as possible. A side benefit is that a large speaker like a La Scala or a Belle makes a nice TV stand.
  9. My Heresy I's woofer is mounted from the rear, behind a 10 5/8" diameter cutout. My Heresy II woofer is mounted from the front. The OP probably didn't unscrew the back of the cabinets to get the woofers off so that he could measure them, which likely accounts for his reporting them as 10".
  10. It looks like an 8 pin SIP. When I was a teenage party animal, I was unsoldering and soldering in new op amps when my Pioneer Supertuner under dash stereo blew them out. Today the young novice hobbyists don't have Radio Shack kits to solder together, or even know who Alfred P. Morgan was. I have a whole collection of his books, purged from libraries around the country. The instructions for the last kit I put together (a 4 tube AM superhet) were printed in Japanese, an enjoyable challenge, but it worked.
  11. I'm sorry for your loss, Gary. The S in the serial number indicates a 1978 manufacture date. I measured my Heresy I just now, and it seems you likely have a Heresy I pair. Welcome to the forum.
  12. X in the serial number indicates a 1982 manufacture date. That date means these are Heresy I, as does the question of taking off the back. You ask about getting them back into shape. That usually means renewing the 38 year old capacitors on the crossovers, which is fairly inexpensive. Other stuff needs to be tested by connecting these to a music source and listening to the individual drivers, one at a time. That determines what's working, and if anything needs to be replaced. After that, enjoy them. I've owned five Heresy I and II since the late 1980s, and still have three.
  13. A multimeter will give you a resistance measurement, which will tell you if a voice coil is open or not. But it won't tell you if the driver still sounds good. Your ears will tell you that part.
  14. That picture has been bugging me since the first time I saw it. The guy is putting labels on freshly made capacitors. I wore a beard cover and a hood when I worked in the cleanroom at Intel, and I could imagine buying a designer cap and finding a ZZ Top length beard hair sticking out of it. No thanks!
  15. Or just stick a paper towel roll up to your ear and listen to each driver. Disconnecting the drivers one at a time will change the impedance at the amp, but won't hurt anything, particularly a simple tube amp, for a short time until you figure out what's working.
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