From sonicv–(at)–ol.com Mon Jun 29 12:29:42 CDT 1998
Article: 272600 of alt.guitar
Path: geraldo.cc.utexas.edu!cs.utexas.edu!howland.erols.net!portc02.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: sonicv–(at)–ol.com (Sonic VI)
Newsgroups: alt.guitar
Subject: Re: Q: VariTone Circutery in a Gibson ES
Lines: 3
Message-ID: <1998062911553900.HAA1669--(at)--adder01.news.aol.com>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: new–(at)–ol.com
Date: 29 Jun 1998 11:55:39 GMT
Organization: AOL http://www.aol.com
References: <359712d9.321020--(at)--news.newsguy.com>
Xref: geraldo.cc.utexas.edu alt.guitar:272600

I saw the schematic in that big orange Gibson book at the bookstore and the
schematic for the Varitone had the inductor labeled 1.5 Henries. I think this
is the value Torres uses in their Varitone kit.

From marcbob*hippo–(at)–ewsguy.com Mon Jun 29 12:29:53 CDT 1998
Article: 272542 of alt.guitar
Path: geraldo.cc.utexas.edu!cs.utexas.edu!howland.erols.net!newshub.northeast.verio.net!logbridge.uoregon.edu!pln-w!spln!extra.newsguy.com!newsp.newsguy.com!enews2
From: marcbob*hippo–(at)–ewsguy.com (Marc Miller)
Newsgroups: alt.guitar
Subject: Re: Q: VariTone Circutery in a Gibson ES
Date: Mon, 29 Jun 1998 04:20:22 GMT
Organization: http://extra.newsguy.com
Lines: 39
Message-ID: <359712d9.321020--(at)--news.newsguy.com>
References: <6ml5dk$csm$--(at)--ews02.btx.dtag.de>
NNTP-Posting-Host: p-796.newsdawg.com
X-Newsreader: Forte Agent .99d/16.182
Xref: geraldo.cc.utexas.edu alt.guitar:272542

Some info is provided online by Gibson.

Varitone filter frequency response specs at:

http://www.gibson.com/cgi-bin/text/reference/infoguides/5.html

(poor quality) gif image of the Varitone Stereo circuit wiring is at:

http://www.gibson.com/relations/schematics/diagrams/thinline.gif

The value of the choke coil seems not to be specified, only the part
number (?).

On 22 Jun 1998 08:42:28 GMT, Schmidt.GEMETE–(at)—online.de (Peter
Schmidt) wrote:

>Hi, folks,
>
>currebntly, I am trying some guitar electronic goodies. I cam across a
>Gibson VariTone circut, as one may find it in an ES type axe.
>Unfortunately, there was no value given for the inductivity coil. Can
>anyone provide values for this?
>
>The effect seems to provide 2nd order notch filter. I am burning to hear
>how this sounds…;-)
>
>By the way, I recently found a stompbox (Snarling Dog) with a similar
>circuitry, for the ones who are not knights of the soldering iron…;-)
>
>Thanks,
>
>Peter
>–
>Schmidt.GEMETE–(at)—online.de (Dipl.-Ing. Peter B. Schmidt)

=============
To e-mail me, kindly delete *hippo* from my address.
Spammers: meet the Hippo at Newsguy (Super Zippo).

From salvarsa–(at)–td.com Tue Dec 1 13:18:02 CST 1998
Article: 266137 of rec.music.makers.guitar
Path: geraldo.cc.utexas.edu!cs.utexas.edu!news-peer1.sprintlink.net!news.sprintlink.net!newsfeed.berkeley.edu!howland.erols.net!cpk-news-hub1.bbnplanet.com!news.gtei.net!firehose.mindspring.com!not-for-mail
From: “Daniel R. Haney”
Newsgroups: rec.music.makers.guitar
Subject: Re: Gibson Varitone
Date: Tue, 01 Dec 1998 11:30:24 -0500
Organization: Salvarsan STD
Lines: 44
Message-ID: <366419A0.3DE--(at)--indspring.com>
References: <366201D0.21DB339--(at)--lark.net> <73vqqp$9f--(at)--anix2.panix.com> <36637F68.BC--(at)--indspring.com> <7404eo$do--(at)--anix2.panix.com>
Reply-To: salvarsa–(at)–td.com
NNTP-Posting-Host: cf.45.20.e7
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Server-Date: 1 Dec 1998 16:29:43 GMT
X-Mailer: Mozilla 3.0 (Win16; U)
To: Mark Garvin
Xref: geraldo.cc.utexas.edu rec.music.makers.guitar:266137

Mark Garvin wrote:
> Haney cited:

>> There is a list of varitone frequency rangesat the bottom of the page
>> at
>>
>> A .gif image of the ES-355/Lucille shematic with varitone is at
>>

> First, the 100k tone pots will load a normal bucker. I don’t remember
> the series resistors (10k?) in the original circuit, but they will
> help to lower the Q of the notch and prevent abrupt phasing around the
> center point.

Yes indeedy. The Lucille/ES-355 is just another bright-sounding
Gibson with humbuckers if you put in 500K pots instead of 100k/300K
for volume/tone. For a guitar used more by Jazz players, the darker
sound makes sense, and those pot values are also used on Heritage’s
H-555, albeit with very dark Schaller humbuckers.

My schematics show a 100K resistor in series; confirmed by
Don Brosnac’s ref “Guitar Electronics For Musicians.” He lists
the Varitone pots as 500K, so it’s likely that Gibson has experimented
with the values over the years and reverted to the 100K/300K combo
that I found in a 1990 Lucille.

Plug: Brosnac’s book is a terrific reference.

> Not sure if my schematic specs the value for the inductor, but that’s
> a tough thing to find. Probably need a few Henrys (not milli or
> micro) to react at audio freqs.

Brosnac lists 1.5H, but I’m probably misrecalling the ’79 Gibson
schematic as 3.0H.

> Active circuits could be done easily without the inductor.

Yep, although most opamps have poor headroom with a 9V supply.
You really want +/-15 Volts driving an opamp for the best sound.
A single 6dB gain common emitter stage driving the Varitonesuck
would help a lot, IMO.
-drh

 

Buy the Book!

I cleaned up my tab for Sonny Boy's Help Me and made it into a short book. There's a Kindle version for 99 cents, and if you buy the paperback you get the Kindle free.

Playing "Help-Me" In the Style of Sonny Boy Williamson II: A step by step, note for note analysis of some of Sonny Boy's Signature Riffs

I also write Science Fiction, so you can sample some of my best stories. Also available in Kindle format.


Error Message Eyes: A Programmer's Guide to the Digital Soul
 

THE ASTATIC CORP. VINTAGE MODEL CX MICROPHONE W/ ORIGINAL BOX

$65.00
End Date: Saturday Mar-23-2019 16:37:44 PDT
Buy It Now for only: $65.00
Buy It Now |
'60s Astatic Chrome GM-178 50K Ohm Bullet 3" Dynamic Microphone Harp Harmonica

$59.95
End Date: Saturday Mar-23-2019 18:15:14 PDT
Buy It Now for only: $59.95
Buy It Now |
Vintage 1950's Astatic 77 microphone custom LED lamp midcentury modern light

$445.00
End Date: Saturday Mar-23-2019 21:13:57 PDT
Buy It Now for only: $445.00
Buy It Now |
ASTATIC CARDIOID DYNAMIC MICROPHONE #727 -18

$75.00 (0 Bids)
End Date: Sunday Mar-24-2019 2:04:38 PDT
Bid now |
Astatic (30210036) RD104E Road Devil Amplified 4Pin CB Microphone

$59.41
End Date: Sunday Mar-24-2019 3:01:53 PDT
Buy It Now for only: $59.41
Buy It Now |

 

The JT30 Page Popular links

I began collecting data about the microphones used by blue harp players before there was an internet. I began organizing it into JT30.com in the late 1990s. I accumulated more stuff than I remember. This is some of it.

Street Theory

A Harp Player’s Guide to Music Theory

Learning Harp

Picking Up Blues Harp

A guide to learning to play Blues Harp

Microphone Information

Usenet Articles


Harp Amps

I've been collecting Harp Amps for a while. This is the old Harpamps.com website. There is lots of information here. Here a coupld of links.


Harp Tab

A collection of songs and riffs that I’ve worked out over the years, plus some libraries of stuff I’ve converted to tablature. I’ve included most of the notes and instructions that helped me when I was learning to play blues harmonica.

Basic Riffs Simple harp tabs for songs Blues riffs and phrases.

Harp-L Archives 1992 to 2002


1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003

Harp Frequently Asked Questions