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Michaelkaufman
Username: Michaelkaufman

Registered: 11-2002
Posted on Saturday, January 21, 2006 - 2:20 pm:   

We've talked about the 2622 & AR-500 EQ's being different. I assume that only two differenct EQ's cover those models??

Are there more? ie: for Musicians, Studios, etc.

Also, the Cowboy has a "Bob Weir Special EQ". Is really different than the others?

mk
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Fox
Username: Fox

Registered: 02-2003
Posted on Saturday, January 21, 2006 - 6:12 pm:   

I have encountered only two eq-boards, although I must say that I have no knowledge about Studio models..
All Artists (exept AR 400) have the same configuration, 3-band eq and two different boards, although the same schematics. I guess that The Cowboy utilises the same board..
All Musicians have the same boards as Artists.
I guess that Studios with 2-band eq share the same board as the AR 400...
Correct if I am wrong...
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Michaelkaufman
Username: Michaelkaufman

Registered: 11-2002
Posted on Saturday, January 21, 2006 - 7:01 pm:   

Fox: Are you saying that, for example, the AR-500 has two boards or that the AR-500 has a 3-band board and the AR-400 has a 2-band board.

I'm pretty sure we recently had pictures of the 2622 vs. AR-500 board, so, maybe we're up to 3 plus possible another for the Cowboy??

mk
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Michaelkaufman
Username: Michaelkaufman

Registered: 11-2002
Posted on Saturday, January 21, 2006 - 7:25 pm:   

ok, search for "EQ" and "board". There are pictures of two different EQ boards in Jim Donahue's section under the thread "Questions regarding 1979 AR500 initial/transitional model". Can someone please post the link here. I don't know how.
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Agr
Username: Agr

Registered: 10-2003
Posted on Saturday, January 21, 2006 - 11:55 pm:   

It's been a while since I compared them but I'm fairly certain that my ST300 has the exact same board as my MC500 except it is missing one band worth of EQ (and the related electronics). I believe the rolloff frequencies are different though. Just an FYI...
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Mr_roadstar
Username: Mr_roadstar

Registered: 06-2002
Posted on Sunday, January 22, 2006 - 1:46 am:   

The RG600 (1986) had a 2-band EQ with Lo-Z pickups.

Steve
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Hasenobu
Username: Hasenobu

Registered: 01-2006
Posted on Sunday, January 22, 2006 - 3:05 am:   

Mr. Roadstar,

Now you mention it, I remember the AR4000 had the same combination.

The 2-band EQ was called "EQII system," and its
feature was:
treble:}20db
(center frequency: 6Khz)
middle&bass:}13db
(center frequency: 500hz)

Here is a review from a Japanese guitar magagine
(April, 1987):
http://www.geocities.jp/hase1961/ARsecret/artist32.html

The photo shown in the center of the page above is the "EQII system."
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Yogi
Username: Yogi

Registered: 04-2003
Posted on Sunday, January 22, 2006 - 7:05 am:   

The parts catalog from 1980 lists 5 different PCBs for guitars and basses. I'll receive a later catalog hopefully very soon, maybe that one has some later types listed...

Juergen


1980_EQ-PCBs

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