Malcolm

Shipping speakers the size of Fortes on a pallet is not a bad idea. Crating them is even better. I have shipped computer systems (real computers, not PCs) around the world. Properly crated (totally enclosed, plywood on the outside, two inches of foam all around, on a pallet), when they get to the other end, you just unpack, cable, power up and they work. Just putting similar gear on pallets for a 1000 mile trip was not always as successful. One system showed up with one rack having all the exterior panels dented and needing replacement. It is possible to pack speakers in boxes in such a manner that the outsides will survive a trip through FedEx or UPS. But there is some likelihood that things will come loose internally because of the way things get shunted around during sorting. OTOH I've had lots of Heresys come and go via UPS, USPS and similar companies come through totally unscathed except one which had the crossover network come loose. If I have a choice of one of the traditional package services, I will choose USPS. Packages don't seem to receive as rough treatment as from the alternatives. I would be particularly careful with anything that had cabinets made out of MDF. The corners are particularly vulnerable. And components attached with screws are more likely to come loose. If the speakers are big enough, sometimes it pays to buy ones you can pick up yourself, even if the initial price is more.

I always liked Bob Denver, first as Maynard, then as Gilligan. Anybody remember Dusty's Trail, a short lived, low budget western series with Bob Denver? It had the same plots and characters, except they were on a broken down stage coach out in the middle of nowhere. Sherwood Schwartz sure knew how to wring every last cent out of a concept. Well, at least we still have Bob Denver on film, etc.

Most tube amps are pretty simple. Your Bogen amp would be a good one to learn on since you already have the manual and schematics and the thing only cost $10 to start with. Everything shows up on eBay sooner or later.

Nah, that University tweeter usually doesn't go for nearly as much as a K-77 or EV T35, typically on the order of $20. But then, you never know when somebody with more money than sense will come along. I've had the luck of that happening when selling something. FWIW some of the early Klipschorn owners seem to prefer the sound of the University tweeter and squawker driver to the later ones.

A few totally unrelated comments... Sounds like one of your tubes developed a leak. The getter deposit on the side of a tube will turn white if air gets in. Look carefully. Is it cracked? I would replace any electrolytic capacitors before proceeding on principle. Mica and ceramic capacitors don't fail very often. But I have seen them fail. I had the side of a ceramic capacitor blow off inches from my face. What kind of capacitor was it that cracked? I wouldn't consider a Bogen PA amp particularly "hi-fi".

It helps to take what current and former Klipsch employees say about the old days with a grain. At lot of it is hearsay. And memories get dimmer with time. There was one former Klipsch employee that frequents these forums that insisted to me that Klipsch never used CTS woofers in Heresys, but the EIA code under the Klipsch badge on my 1972 and 1975 Heresys is clearly that of CTS. Eminence was founded in 1966 by Bob Gault who left CTS. I know CTS started providing Klipsch with K-33s fairly early on. I was not aware that Eminence produced a K-22 until the 70s around the time of the switch to 8 ohm woofers. Almost all the Heresys I have seen produced from the early 60s to the mid 70s had one of three woofers. The earliest had an EV SP12B variant. Later ones had a large alnico magnet CTS woofer. And the last hadr a small alnico magnet CTS woofer. The exceptions were a few late ones with the Eminence alnico K-22-E. Ofcourse, this does not mean that some Eminence woofers might not have made it into earlier Heresys. PWK was apparently very flexible about what he put in. In any case, from my experience, you do indeed have a relatively rare woofer.

Tweeter appears to be a University tweeter similar to those used in Klipschorns in the 1950s. But they were used in lots of speakers. Never heard of the manufacturer of the squawker driver. Squawker horn doesn't look right for a Klipschorn. Capacitors and coils appear physically larger than what Klipsch used at that time. Cabinetry doesn't look professional to me. My guess is that it is homebuilt even though you have professional blueprints. It is not uncommon for people to take advantage of services at work for personal projects. Can you open up the bass bin and take a picture of the front and back of the woofer?

What was that old song? "If you want to be happy for the rest of your life..."

IIRC Andy once said the K-700 was welded. None of the K-700s I have seen from the 60s through the 80s looked like they had been welded, though. Cleaning up the bead on the inside would certainly have been a task. I see grinder marks on the outside of some of these horns. But the insides are nearly pristine, with very little flash. And there is really no reason they could not be cast in one piece. The parting lines on the K-700s are consistent with what would be produced by a mold of the type in the picture.

Rob, Here is another link you might find useful http://sound.westhost.com/tsp.htm

Kudret, That is a very nice pair of 1972 Heresys, much nicer than mine. You have what I referred to as the large alnico magnet CTS woofers (16 ohm). So, I think the change back to a Type C network is warranted.

I would take the 10.7 ohms as an indication of a nominal impedance of 16 ohms. So, I agree, putting the network back to the original Type C configuration is the way to go. One might not notice the difference in sound with the wrong crossover configuration unless you were A/Bing with another set of speakers set up as they left the factor. And even then some folks might not notice the difference. We all experience the world differently. All that really counts is how your gear sounds to you.

Having a bad life? You must have way too much free time on your hands.

I don't know for sure whether the K-22-E is an 8 ohm woofer or a 16 ohm woofer. I never had one come through my hands so that I could measure it. That is why I asked if someone could measure one. Do you have a meter you can measure it with? If not, it might be worth investing a few bucks in one to find out. Do you have Harbor Freight down there? They frequently have a cheap meter that put on sale for $3 or $4 that will do the job.

That is how a jokster taught a friend of mine in France to say "Thank you very much!" The two phrases sound very much alike when pronounced in French. My friend could not tell the difference. The French could and got a big kick out of it. He told me you also have to be careful how you pronouce your friend's name if it is Lucien. Sounds very much like le chien, which means something very different. What a language! But then I have enough trouble with English.

I know the difference between impedance and resistance. You apparently don't know how to measure impednance without a fancy box. Do you even know the relationship between frequency and impedance, the formulas for capacitive and inductive reactance, or anything related to calculating impedance?

Merci beau cul! Did I spell that right?

Heck you can measure impedance with a frequency generator, a volt/ohm meter and a known resistance.

Milton's woofer is the K-33-E alnico woofer from Eminence I mentioned. Bob's woofer appears to be the last of the CTS alnico woofers, the small magnet version. The EIA code is under the Klipsch badge. I have a pair of 1975 Heresys with these. They are indeed 8 ohm units and are paired with Type E networks. I forgot all about these. I have to make a web page with pictures someday to keep all this stuff straight. So, to recap and clarify... A red doped surround on a Heresy woofer is a good indication that it is a 16 ohm unit, but not a guarantee. Likewise, a paper surround is a good indication that it is a 8 ohm unit, but not a guarantee. The 16 ohm EV and CTS woofers used from the early 60s to the mid 70s had red doped cloth surrounds. The 8 ohm woofers from Eminence and others used from the late 70s on had paper surrounds. There was some overlap in the transition years. I find it interesting that my 1972 Heresys have 16 ohm large alnico magnet CTS woofers (K-22) , Milton's 1974 Heresy has an alnico magnet Eminence woofer (K-22-E), my 1975 Heresys have small alnico magnet CTS woofers (K-22), and my 1978 Heresys have ceramic magnet Eminence woofers (K-22-EF). And IIRC there was a K-22-R from Rola in that time frame. Klipsch sure did switch around a lot in the 1970s, apparently driven by the need to maintain a reasonable price point for the Heresy and at least in part by the rising price of the cobalt used in the alnico magnets. Klipsch also wasn't too consistent about labels for the Eminence woofers. The alnico one was labelled K-22-E, the ceramic one that followed was labelled K-22-EF (for ferrite I guess), and a few years later they apparently later labelled the same ceramic woofer, or at least one more similar to it than to the alnico one, K-22-E. Can someone measure the voice coil resistance of an alnico K-33-E and let us know for sure what it is?

Bob, Are they labelled simply K-22, not K-22-E or something else? What are the EIA codes on them? Might be under the Klipsch badge. I am curious as to the year of manufacture. Can you post pictures of both sides?

All the 16 ohm K22 woofers from EV and CTS used through from the early 60s to 1975 that I have seen had a red doped fabric surround. It is pretty much a give away that the woofer is 16 ohms if it is original. The later 8 ohm woofers had folded paper surrounds that were part of the cone itself and therefore the same color, black. It is certainly possible to have a 16 ohm woofer with a paper surround, or a doped fabric surround of a color other than red, but I don't recall ever seeing one in a Heresy. That doesn't mean there isn't one. Klipsch change woofers many times in the Heresy. The way to tell for sure what you have is to measure voice coil resistance. If it is somewhere around 12 or 13 ohms, you have a 16 ohm woofer. If it is around 6 or 7 ohms, you have a 8 ohm woofer. The difference is important. If you have a 16 ohm woofer, you need to leave the capacitor values and autotransformer taps as they came from the factory on the Type C network. If somewhere along the line someone replace the woofer with a 8 ohm K-22, you need to change the crossover to Type E configuration, changing both the capacitor value and autotransformer taps. Can you post pictures of the front and back of the woofer?

4'? Wow, that is a sensitive set. Besides moving the speakers away, you can change their orientation. Try angling them a little in on direction or the other. Or try moving them forward or back from where they currently are, or even up or down a bit. The magnetic field is not symmetric in all axes. Maybe you can find a sweet spot where the field is at a minimum in the direction of your TV. I think you should still be able to get bucking magnets for the woofer from Klipsch. They change the magnetic field so it is less of a problem. You just epoxy them on the back of the woofer magnets after properly orienting them. If all else fails, you could try using Heresys with alnico magnets. The design of the magnet circuit results in smaller stray magnetic fields. I have a 27" TV sitting right on top of a 1972 Heresy on its side. And no problems. If you had the speakers real close to the screen when moving them around, it is possible you magnetized the shadow mask of the CRT. The automatic degaussing circuit may remedy this. If it is too highly magnetized, you may have to degauss it with something more powerful than the coil that is buit into the TV.

Just curious, what is the model number of the woofer, K-22, K-22-E, etc.? Also, is there an EIA number stamped somewhere on it, something like 67-xxxx or 137-xxxx? Have you measured the DC resistance of the woofer voice coil? The EV and CTS manufactured woofers used through at least 1972 have red doped fabric surrounds. They are all labelled K-22. There was an alnico magnet K-22-E used for a while before the switch to the 8 ohm woofers with ceramic magnets. But I don't remember what kind of surround it had. IIRS I have seem a K-22-R manufactured by Rola from the same time period.

You won't get any better connection using 5-way binding posts, but they are way more convenient.

If you changed the values of the capacitors on a Type C crossover to match those of a Type E crossover, you changed the crossover frequencies. Ofcourse it won't sound the same. The Type C crossover was designed for a 16 ohm woofer. Type E was designed for a 8 ohm woofer. One of the caps in the Type C is different value than the Type E and autotransformer taps used are different. IIRC the one feeding the autotransformer should be 1 uF on a Type C and 2 uF on a Type E. If you want it to sound right, you need to put it back the way it was. New caps of the original value are alright. Leave the woofer phase the way it was. The change in woofer polarity occured after the switch to a 8 ohm woofer. The first ones had Type D crossovers. Then Klipsch decided the new woofer sounded better with the phase reversed and changed to the Type E crossover. There is a Dope from Hope article detailing the change.