Malcolm

I would not reverse the woofer leads on a Type C network, The tweak was done to fix a problem with the Type D network that was in the first Heresys with 8 ohm woofers.

The screw in question appears to be a fillister head sheet metal screw. They are used in the automotive industry and elsewhere. Frankly, it isn't the best choice for securing a speaker to the motorboard. There is really no correct "Klipsch" screw. Klipsch seems to have often used whatever was available and worked for screws, capacitors, etc. From what I have seen, most often it was a pan head sheet metal screw. A truss head screw would be the best choice IMHO.

Late 60s and early 70s Heresys with Type C Network were described by Klipsch as being 8-16 ohm speakers. Later models a 8 ohm. Very earliest would be 16 ohm I think?

Deterioration of the oxide layer in idle aluminum electrolytics resulting in capacitance changes and increase in leakage current has been well documented for a very long time (1930s or earlier?). If the oxide layer is reformed before the process has progressed too far, the capacitor can be returned to nominal leakage current. If the process goes to far, it may not be possible to return to nominal. I suspect that the best modern electrolytics are less susceptible than older ones because of improved electrolyte formulas, but still susceptible because the whole design depends on maintaining a tightly control oxide layer thickness. I cannot count how many pieces of electronic equipment I have rescued by replacing functioning, but degraded electrolytics, Electrolytics are like beer: you can't own them, only rent them.

Look here: http://www.reloadammo.com/9mloads.htm.

What high pass filter? Are you sure the high level input and the high level output aren't just tied together?

I have seen many types of capacitors fail. I have seen electrolytics turn into a cloud of aluminum foil. I have seen epoxy dipped tantalums turn into little orange sky rockets. And I have seen ceramic disk capacitors blow in half. All these were essentially cases of abuse. Electrolytic capacitors (aluminum and tantalum) are the only type of capacitors that IMHO will definitely deteriorate over time, with perhaps the exception of the old paper capacitors (not paper in oil). In general, electrolytics will degrade faster on the shelf than in a working circuit. The only electrolytic I have seen in a Klipsch crossover is the 33uF nonpolarized electrolytic in the E2 crossover in mid 80s Heresys. But there could be others. It was used because it was a good way to get a relatively large capacity at reasonable cost for a non-demanding application. There may be other models of Klipsch crossovers with electrolytics that I haven't seen. Most of the heremetically sealed paper in oil capacitors used in older Klipsch speakers are probably as good as the day they were installed if the haven't leaked or been abused. Same goes for just about any of the film caps Klipsch has used in crossovers. But the only way you can tell for sure is to measure capacity, equivalent series resistance, and leakage current. The only reason to replace anything other than an electrolytic that isn't obviously defective is to put something better in. Even then, you may not really hear a dfifference. I replaced that 33uF capacitor in the Heresy with a technically better, more expensive polypropylene cap, because it was just a matter of time before it failed. Can't say I could hear a difference, though. I replaced the 2uF motor caps used in the Type E crossover with high quality film caps. Can't say I heard a difference there, either. FWIW lots of folks say they hear an improvement when they replace caps.

Type C networks were use in early H700s. They had a 1 uF cap feeding the autotransformer and used a different tap than the Type E network. I don't recall if there is a phase difference in the hookup of any of the woofer, squawker or tweeter. Type C is the proper match for the woofers used in the early H700s. Type D or E is the proper match for the woofers used in the later Heresys.

Early K22s were SP12Bs. The earliest ones had the stamped frame. The later ones had the cast frame. I have a pair of early 60s Heresys with these in them.

No, the E2 network is for a later model with a different squawker driver.

I could hear enough of a difference, even if a very small difference, between the K-55-V and the K-53-K or K-52-H that I wound up replacing a pair with K-53-Ks in my HT system with a set with K-55-Vs so everything matched. Others have reported they cannot hear a difference. You will have to be your own judge. If it were just a choice between a pair of one, or a pair of the other, it would make much of a difference to me.

The first number is the systolic pressure. It is the pressure as your heart contracts and tries to force blood through your arteries. The second number is the pressure as your heart relaxes and fills with blood. You can think of the two numbers as the maximum pressure and the minimum pressure as your heart pumps blood through you arteries. Both of your numbers are in what generally seems to be accepted as the unhealthy range. I'll let your doctor explain any more than that.

Looks like a couple of a**holes messing with the seller to me... Check out the bids so far.

Hmmm... I don't think x-rays are going to detect explosives like that. C4 and Fimo modelling clay are going to look pretty much the same if they have the same density. I do know, though, that many big airports have explosive detectors that sniff the air and detect certain kinds of molecules. Maybe that is what you are thinking of? FWIW the TSA wants to get rid of them. Maybe too many false alarms? I bet you wouldn't get those capacitors by ElAl without a close look...

1 uF and 2 uF is correct for what you have. The autotransformer taps used are different than on the later D, E and E2 networks. I wouldn't worry about the fact that you have dual section caps. They could be original. Klipsch used just about anything they could get at the time when it came to Heresy caps. It almost looks like they used a lot of surplus stuff. OTOH changing them out with decent new caps certainly wouldn't. What you are hearing could be due to the caps not being in spec anymore. I have a mix of Heresys from the mid sixties to the late seventies and I don't here a difference. But then your hearing may be better than mine. Clipped from an old audioasylum thread: "EIA is 1mW at 30ft, add 30dB for 1W, add 19.216dB for 1M" 46.5 + 30 + 19.2 = 95.7

Absolute worst movie of all time has to be Plan 9 From Outer Space. And Jerry Seinfeld agrees with me. It was produced and directed by Ed Wood, one of the most incompetent, but driven, people in Hollywood. The budget was so small they couldn't afford a robot costume, so they used a gorilla suit and a diving helmet. Day and night shots are interspersed in the same scene. Clips of Bela Lugosi from another production are edited into it. Another very different looking actor adds more footage for Lugosi's character. Flying saucers wobble on strings. The list goes on and on... Attack of the Killer Tomatoes is a close second IMHO...

I am on 1.5.0.6 and see no problems.

The last of the Heresys (1984 to 1985) had a K22, K-53-K on a K701 or K-52-H on a K700, a K77M, and an E2 network. E2 network is just an E with a 33 uF cap across the woofer circuit. So, all you have to do is add the tweeter. FWIW, if you don't need the 2 or 3 dB extra the K77M gives you above 11 kHz or so, a K77 will do just as well. Some folks even prefer the K77 to the K77M.

Sonicap is the only brand that offers metalized caps at +-5% values? Since when? The Solen FastCaps I use are +-5%.

Heresys with Type C networks have a 1 uF and a 2 uF cap. Yes, an electrolytic, even with all its faults, is good enough for where it is at. That is why Klipsch used one in the first place. But it will eventually degrade significantly like all electrolytics. And it is still tacky!

I use both feet on cars with automatic transmissions. I also drive vehicles with manual transmissions. I think the reason driving with both feet is discouraged goes back to the early days of automatic transmissions and the fear the people would get confused. But it has never been a problem for me.

Geez, BoB. All that work and you didn't replace that tacky electrolytic...[]

Anybody who says a Heresy with a K22 is only 2 dB down at 40 Hz is liar or doesn't know how to measure it. In any case, he is full of shit...

I sold all mine to people on eBay.

Heresys are 3 dB down by about 65 Hz. Depending on the music you listen to, you may want a good sub to go with them. OTOH some kinds of music don't really need it.