boom3

I just realized the OP was last year...oh well...my advice still stands

Crater Lake is fantastic and hopefully it will be open in October. Also, Lava Beds National Monument in northern Cali is great; it has lava tubes to explore, and don't miss Petroglyph Point, a huge set of petroglyphs . In Oregon, the Rogue River can be seen at a number of state parks. The Rogue has many manifestations and each view is different.

The good folks over at Antique Radio Forums/Phonographs might be able to help you, try: https://www.antiqueradios.com/forums/viewforum.php?f=9

There was once a site: http://www DOTmh-audioDOTnl that had a number of speaker design calculators. This morning, it seems like all the links I have for that site are dead. There is another "MH acoustics" but they are a US-based professional consulting and microphone company. Does anyone know what happened the "mh-audio" ? thanks

Maybe to get an inductance value not obtainable in "standard" values? Having worked with EE's in design and production environments, I can tell you that the choice of any component's form factor is dictated by what is available (considering lead times and source consistency) and what real estate (in three dimensions) is allowable. I used to have a General Radiotelephone license (commercial, not amateur) and recall that some of the test questions were theoretical and not things you'd be likely to find in real practice.

I would search the Forum by the driver series numbers, i.e. K-43, K-44, K-77, K-53, etc and see all the posts that address the permutations of the part numbers. For example, there have been several threads on the K-77 lineage. From these posts, you can get an idea of what part numbers were used in each Heritage model across time. You probably know that for many years Klipsch bought drivers from Stephens, Eminence, Atlas, Electro-Voice, etc and applied their own QA, so, for instance, the "stock" T-35 EV tweeter is not the same as a Klipsch branded K-77 of the same year. The specs for the Klipsch speakers usually list the drivers for each model, so if you can find the factory listing online, or as a print brochure, you can find the part numbers there. As far as electrical specs, AFAIK, these have been measured after the fact by Forum members; Klipsch did not routinely publish electrical specs on individual drivers.

As a historian, I can identify with this thread very closely. My first book was published in 2009, and the second in 2018. Each project took about five years. The amount of online info posted between those two projects amazed me. Much less working the microfilm for the second project. One thing I discovered that many libraries have subscriptions to newspaper and other databases, and you can access them if you have a library card. That was a big help. Some of these library licenses, alas, are only "educational" or "academic" ones. For instance, I was pleased to see my local library has access to the New York Times archive. I was disappointed to learn their license only covers issues up to 1919.

I would address this to the Antique radio forums https://www.antiqueradios.com/forums/index.php I'm sure you are aware that the "electrodynamic" speakers of that time use the electromagnet of the speaker as a filter "choke" for the power supply. There are guys on that forum who have a lot of experience with these type of speakers.

The last time I saw them on TV, the back up band was doing most of the playing, and I expect that will be true of their Jazz Fest appearance next year. IMO, the Stones (who I have seen live and grew up listening to a great deal) playing Jazz Fest is the final act of de-Jazzing Jazz Fest. Ain't Jazz Fest no more...

Lizards like to cuddle for warmth. My sister had a friend that had an iguana, and it wanted to sit in my sister's lap whenever she visited. She had mixed feelings about that!

"The Doing of the Thing : The Brief Brilliant Whitewater Career of Buzz Holmstrom", by Vince Welch, Cort Conley, Brad Dimock

Thanks Marvel, that mike looks sweet (water) but I am not conducting any interviews right now, andI think since digital recorders have matured, I probably would buy one if I need to interview again

Thanks guys. Now I think it is the recorder since output with the built-in mike is highly variable, I just have no other recorders around to cross check. There's always the record built-in to computer if I really need it.

Hi, I have a RS Boundary Mike (clone of Crown PZM) that I've used for many years. It uses a 357 coin battery. I replaced the battery, but the mike barely outputs anything. It has sat up for several years, so I replaced the battery but still almost nothing. It used to be so "hot" that I had to use an inline attenuator with my cassette recorder, for interviews. I *think* this is an electret mike. Do they lose their charge over time, and can they they be re-charged? TIA

JL you are spot on, except...I'd like to keep the Tek going (if it's safe). I rarely need a scope these days but looking to retirement I'd like to keep the Tek available without concerns. If I had a '63 Lincoln (and I wish I did) I'd pay for a brake job if it needed it.

I have a Tektronix 502A scope, all tubes. A battleship of its day. It still works fine except for one little issue. The front panel is 60 v above ground. I am not equipped to work on tube gear. Anyone have an idea how this is a happening? I have the tech manual for it. TIA!

Lost Creek lake, Oregon

Rogue River, Oregon. Still pictures just don't do justice to this river of many personalities

Mount Hood, Oregon

It might be. I asked the property manager and he didn't know. I'm not sure if there is a transformer on-site. I don't recall seeing a transformer vault or a transformer on a pad. when next there I will see if I can find where the incoming line terminates on the property. This is a fairly rural area and about two miles from the nearest highway. Thanks!

For many years I've seen a two conductor set-up on power poles in northern California. The poles have a PG&E label. I know they're not DC. I am wondering why a single phase supply is being provided anywhere now. The label says "high voltage" but there is no indication of what that might be. Any ideas?

Well, that falls into personal preference or taste. However, that deliberate resonance will be a permanent part of the speaker and any music that excites it will reveal it, whether's appropriate or not. I knew someone who rebuilt jukeboxes, and he said that his customers wanted the "jukeboxy" sound, not "hi fi."

from the grid. Just for back up