Hello all!
Because once in a blue Moon you can reach a pair of 601 with working tweeter I decided tu buy one with faulty tw for 200$. And I bought two 3000 tweeters, (I think that Washington the last 2 Altec 3000 tweeters of Bil Hayes. Tim send it to me last year, state that are H) one green and one black. I asked a friend to put it on the body of 601, the green one put it directly but the black one he tooked the diafragm and the magnet and put it in the original green body of the tweeter of the 601c. After a year when I decided to make a new x-over I measured the DCR of the twwters and a big WOW: the green one have 30 ohms and the black one 70 ohms.
My questions are:
1. Because of this difference of DCR of the tweeters can I use for bouth speakers a N3000E crossover?
2. N3000E use autotransformer, can be substituted with anything
3. All versions of 3000 tweeter use the same diaphragm, voice coil and magnet
4. 601c what version of 414 use
Thank you!
You sincerely,
Claudiu Neagu M.D.
Because once in a blue Moon you can reach a pair of 601 with working tweeter I decided tu buy one with faulty tw for 200$. And I bought two 3000 tweeters, (I think that Washington the last 2 Altec 3000 tweeters of Bil Hayes. Tim send it to me last year, state that are H) one green and one black. I asked a friend to put it on the body of 601, the green one put it directly but the black one he tooked the diafragm and the magnet and put it in the original green body of the tweeter of the 601c. After a year when I decided to make a new x-over I measured the DCR of the twwters and a big WOW: the green one have 30 ohms and the black one 70 ohms.
My questions are:
1. Because of this difference of DCR of the tweeters can I use for bouth speakers a N3000E crossover?
2. N3000E use autotransformer, can be substituted with anything
3. All versions of 3000 tweeter use the same diaphragm, voice coil and magnet
4. 601c what version of 414 use
Thank you!
You sincerely,
Claudiu Neagu M.D.
My research reveals that the N3000E is a high pass filter for the tweeter section (the bass section being driven directly from the amplifier).
It appears to have resistive setting of attenuation level which is probably quite accommodatiing of variations in tweeter impedance value.
On the other hand, the N3000A crossover network does contain an autotransformer.
I'm not an expert on Altec and am simply extracting information from this thread: https://www.audioheritage.org/vbulletin/showthread.php?7257-n-3000-xover-schematic-for-601c-Altec
At least I've given your thread a bump until the Altec experts do come along! 🤓
Never had any interest in these, so you saved me some (re) searching 😉; just know the NLA diaphragm is from a microphone and 'pops' at any transient spike worthy of the name, so can't be too protected.
Also FWIW, N3000F network and comparing other XOs for bigger horns, autoformer sounds best to me, especially if low DF tube driven, though I'd think twice at today's prices, which are way higher than just inflationary.
Also FWIW, N3000F network and comparing other XOs for bigger horns, autoformer sounds best to me, especially if low DF tube driven, though I'd think twice at today's prices, which are way higher than just inflationary.
The schematic for N3000e it is wrong. L1 and L2 it is the same coil more exactly a tapped coil with solid core