[Harp-L] Re. Amp Feedback

[Roger Boyce <roger.boyce@xxxxxxxxxxxxxxxx>]

Re. Amp Feedback

I spent decades futilely fighting (guitar) amp feedback. Used various
vintage valve Fenders, Mascos, Gibsons,blah, blah, blah guitar amps. I
switched out 12AX7's tubes for 12AX7 12AT7, 12AU7, 12AY7, etc. Had my amps
tweaked (for harp) by expert techs.

Used graphic EQ's, Parametric EQ's, D.I.'s with parametric EQ's, and various
other ingenious devices to try to eliminate feedback.

In short I needlessly spent a whole stack of money pointlessly fighting
feedback from guitar amps. Guitar amps are engineered for guitars.

I finally bought a Kendrick Texas Crude (4x10) - lo and behold no
feedback....Duh, the Kendrick was designed for amplified harp and its
specific harmonic spectrum. Killer, crunchy, deep-fat-fried-tone, coming and
going. Died and went to heaven.

Later I bought a HarpGear II. Brilliant, lightweight little amp designed and
flawlessly hand-built for amplified harp.Good price-point as well. Thus,
again, no feedback. It has a line out feature which makes the Champ-sized
dynamo work at any sized gig by lining out to the PA.
Same crunch ( at low or high volumes ) through the amp's alnico or through
the PA. Miracle Du!!!!!!

There are now quite a few seriously well designed boutique-quality amps made
for harp. An online search, or a perusal of Harp-L archives will provide
plenty of brand names to choose from - both in and out of production.

These amp producers need, and deserve, our support if they are to stay in
business and develop new and better products. In the long and short run you
will (SERIOUSLY) save money, not to mention, years of frustration, if you
simply, wise up, break down, and buy one of these fine amps.

One of these amps and a decent analog delay will give you all the tone
you'll ever need - WITHOUT THE FEEDBACK.

Young-uns, please benefit from my decades of foolishness and, glacially
slow, enlightenment about the matter of harmonica amplification.

For What it's Worth

Roger 'Wader' Boyce
Christchurch, New Zealand
The New, New World 




On 7/8/07 11:36 AM, "harp-l-request@xxxxxxxxxx" <harp-l-request@xxxxxxxxxx>
wrote:

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> Today's Topics:
> 
>    1. neil young (TomEHarp@xxxxxxx)
>    2. New Sonny Jr. / Workshops (Robert Ross)
>    3. Subject: [Harp-L] Re: Subject: The Last Waltz/Muddy Waters,
>       Paul Butterfield (EGS1217@xxxxxxx)
>    4. Subject: Re: Dave Toussaint, Chromatic YouTube clip "The
>       Dealer" (EGS1217@xxxxxxx)
>    5. chicken shack tab (TomEHarp@xxxxxxx)
>    6. Subject: RE: [Harp-L] Re: Highbury Pub (EGS1217@xxxxxxx)
>    7. Re: Re: open source = jazz (Philharpn@xxxxxxx)
>    8. Re: Subject: [Harp-L] Re: Subject: The Last Waltz/Muddy
>       Waters, Paul Butterfi... (MundHarp@xxxxxxx)
>    9. Re: SPAH: The Highbury Pub (MilwHarmonica@xxxxxxx)
>   10. Re: controlling amp feedback (Peter and Connie Ruth)
>   11. Hootchie Koochie Mans' Birthday (Peter and Connie Ruth)
>   12. Re: Re: controlling amp feedback (Frank Evers)
>   13. Re: Re: controlling amp feedback (IcemanLE@xxxxxxx)
>   14. Subject: [Harp-L] Re: Subject: The Last Waltz/Muddy Waters,
>       Paul Butterfield (EGS1217@xxxxxxx)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Sat, 7 Jul 2007 09:47:51 EDT
> From: TomEHarp@xxxxxxx
> Subject: [Harp-L] neil young
> To: harp-l@xxxxxxxxxx
> Message-ID: <c9a.137f17ca.33c0f387@xxxxxxx>
> Content-Type: text/plain; charset="US-ASCII"
> 
> i'm looking for the the harp notes for the intrp in   helpless and long may
> you run. are they anywhere on line??
> 
> 
> peace on earth
> tommy lee
> 
> 
> **************************************
>  See what's free at
> http://www.aol.com.
> 
> 
> ------------------------------
> 
> Message: 2
> Date: Sat, 7 Jul 2007 10:02:12 -0700 (PDT)
> From: Robert Ross <robertaross@xxxxxxxxx>
> Subject: [Harp-L] New Sonny Jr. / Workshops
> To: harp-l@xxxxxxxxxx
> Message-ID: <345115.86743.qm@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
> Content-Type: text/plain; charset=iso-8859-1
> 
> Hi Sonny,
> 
> If you do any workshops in Florida, you can count on me to be there.
> Miami would be great, buyt there are lots of harp players all over
> tghe state.
> 
> By the way, you left the price out of the sentence where you were
> about to reveal it (I do that too when I am talking, get off on a
> tangent and never come back :-) :
> 
> <<"I believe my
>   price 
> retail with the 2 x 10 setup ( I stayed away from any 8" speakers
> this
>   time, I 
> never wanted to hear, Great tone, BUT, concerning projection, and 8"
>   speakers 
> may give a nice breakup, but cannot project into the house and always
>   sound 
> the same), these 2 x 10's give tremendous bottom end, That Little
>  Walter  
> recorded sound, but with a midpresence attached to them due to the
>  circuit at  30 -
> 35 watts driving them, that you will hear behind you, it will get
> into
>   the 
> house, has line out, and all the features of the 410. As usual, this
> is
>  more  ... " >>
> 
> 
>        
> ______________________________________________________________________________
> ______
> Sick sense of humor? Visit Yahoo! TV's
> Comedy with an Edge to see what's on, when.
> http://tv.yahoo.com/collections/222
> 
> 
> ------------------------------
> 
> Message: 3
> Date: Sat, 7 Jul 2007 11:30:08 EDT
> From: EGS1217@xxxxxxx
> Subject: Subject: [Harp-L] Re: Subject: The Last Waltz/Muddy Waters,
> Paul Butterfield
> To: harp-l@xxxxxxxxxx
> Message-ID: <c2d.14786679.33c10b80@xxxxxxx>
> Content-Type: text/plain; charset="US-ASCII"
> 
> Correction:  I just remembered that the song Muddy and Paul  Butterfield
> played together in its entirety was "Hoochie-Coochie  Man".....because I kept
> thinking of Buzz Krantz during it ;)
>  
> ...Muddy also does "Mannish Boy" in the film.
>  
> Eliz
>  
> "Message: 10
> Date: Sat, 7 Jul 2007 08:05:54 EDT
> From:  EGS1217@xxxxxxx
> Subject: [Harp-L] Re: Subject: The Last Waltz/Muddy Waters,  Paul
> Butterfield
> To: harp-l@xxxxxxxxxx
> Message-ID:  <cfb.12ccb2a5.33c0dba2@xxxxxxx>
> Content-Type: text/plain;  charset="US-ASCII"
> 
> I'm sure this has been discussed here before my time,  but I saw The  Last
> Waltz for the first time in its entirety a couple  of days ago on  Flix.  The
> 1978 
> movie featuring the 1976 final  tour of Robbie Robertson's  The Band ....with
> their guests.  So  many fabulous musical moments...some  interesting
> harmonica 
> work (yes,  even by Neil Young and Bob Dylan) ...but what  really stood out
> was  
> Muddy Waters being backed up by Paul Butterfield.  In  living  colour,
> instead 
> of old black/white youtube videos...performing the  entire  song of "Mannish
> Boy".
> 
> The video's worth getting for  that performance alone, as well  as Robbie
> Robertson's reminiscence of  their last meeting with Sonny Boy  Williamson
> shortly 
> before his  death.  Directed by Martin  Scorsese.  Incredibly  good.
> 
> Elizabeth"
> 
> 
> 
> 
> ************************************** See what's free at http://www.aol.com.
> 
> 
> ------------------------------
> 
> Message: 4
> Date: Sat, 7 Jul 2007 12:42:19 EDT
> From: EGS1217@xxxxxxx
> Subject: [Harp-L] Subject: Re: Dave Toussaint, Chromatic YouTube clip
> "The Dealer"
> To: harp-l@xxxxxxxxxx
> Message-ID: <d06.13de4364.33c11c6b@xxxxxxx>
> Content-Type: text/plain; charset="US-ASCII"
> 
> Came across this by accident...very, very nice.  Dave himself comments  that
> he didn't think the video existed.  It was taken the first time he  played
> with Glasgow blues guitarist Jimmy Sticks and guitarist folk singer Joe  Kerr.
> Great song and playing...
>  
> _Click  here: YouTube - The Ugly band "The Dealer" (chromatic harmonica
> blues)_ (http://www.youtube.com/watch?v=DQObYlyEQrQ&mode=related&search=)
>  
> Elizabeth
> 
> 
> 
> ************************************** See what's free at http://www.aol.com.
> 
> 
> ------------------------------
> 
> Message: 5
> Date: Sat, 7 Jul 2007 12:15:46 EDT
> From: TomEHarp@xxxxxxx
> Subject: [Harp-L] chicken shack tab
> To: harp-l@xxxxxxxxxx
> Message-ID: <cf8.1202fcaf.33c11632@xxxxxxx>
> Content-Type: text/plain; charset="US-ASCII"
> 
> also looking for the little walter chicken shack tab.can ya help me ???
> 
> thanks very much
> 
> 
> **************************************
>  See what's free at
> http://www.aol.com.
> 
> 
> ------------------------------
> 
> Message: 6
> Date: Sat, 7 Jul 2007 12:24:37 EDT
> From: EGS1217@xxxxxxx
> Subject: Subject: RE: [Harp-L] Re: Highbury Pub
> To: leone@xxxxxxxx
> Cc: harp-l@xxxxxxxxxx
> Message-ID: <cbf.e9d2dda.33c11845@xxxxxxx>
> Content-Type: text/plain; charset="UTF-8"
> 
> Message: 6
> Date: Sat, 7 Jul 2007 02:28:48 -0400
> From: Joe and Cass  Leone <leone@xxxxxxxx>
> Subject: Re: Subject: RE: [Harp-L] Re: Highbury  Pub
> To: EGS1217@xxxxxxx
> Cc: harp-l@xxxxxxxxxx
> Message-ID:  <1F78974B-7141-4E51-B4F0-F7AB8B881617@xxxxxxxx>
> Content-Type:  text/plain; charset=WINDOWS-1252; delsp=yes;
> format=flowed
> 
> 
> On Jul 5, 2007, at 4:57 PM, EGS1217@xxxxxxx  wrote:
> 
>> No need for you to apologize at all, Michael.  Your and  PT's
>> listings  were
>> accurate.  My curiosity was  of the gig list mentioning several
>> people  as
>>  playing that night at somewhere called the Highway instead, clearly
>> an  error.
> 
> No, it IS a highway. The Highbury is down the  highway. (I forget the
> route number)
>> 
>>  I looked it  up on their website too...it's listed as PUB and been
>>  written
>> up in the local Minneapolis papers with that designation as  well
>> as  Lounge, as
>> well as simply The Highbury.  Anyone disputing that info merely  has
>> to check
>> the  following link:
>  
> ........Now I clearly erred in describing it as written up in the
> "Minneapolis" papers.  For some reason I constantly mix up Minneapolis and
> Milwaukee.  
> Have no idea why.  Proves that even the most meticulous of  us spellers can
> still make mistakes (and 'fess up to them) <G>
> 
>> _Click here: The Highbury Pub -  Milwaukeeâ??s Premier  Soccer
>> Establishment_
> 
> The Brewer's are a soccer  team?
>  
> The owner plays for a local soccer team...there are a lot of Milwaukee
> soccer players/music fans, so he started this place.  Hey...50 - 70  different
> kinds of beer to choose from can't be bad from a harp player's  point of
> view...They have hard cider too...and wine for the ladies (like me)  <G>
> 
> 
>> (http://www.thehighbury.com/)    Sounds like a fun  place  to hang
>> out for an
>> evening, especially for a  Brit like me.
> 
> How do they feel about spaghetti benders (like me)?
>  
> ...ahhh, okay...I'll put in a good word...they'll let both you and Jason in
> if they can stamp your hand, and maybe if I curtsy.
> 
>> John is, as  usual, being a bit too literal in his corrections.
>>  We've  had
>> several such discussions on Slidemeister before.   The street name
>> is  also
>> misspelled from his  checking of the website, so here is the final
>>  correct
>> information:
>> 
>> The Highbury Pub is at 2322 South  KinnicKinnic Avenue,
> 
> KinnicKinnic KinnackKinnack PaddyPaddy  WhackWhack.
>  
> ...Give the dog a bone, this old man came rolling home?
> 
>> Bay  View, Wisconsin
>> (corner of Lincoln and KinnicKinnic), Phone 414-294-4400  (from
>> their  website).
>>  Anyone planning to  attend might want to do a mapquest from the
>> Hotel  and
>> remember to bring it from home (last time I forgot our  map
>> instructions in NY
>> so we got to the blow-off  quite late - a comedy of  errors), or get
>> accurate
>>  directions from the Hotel Staff upon arrival.   Start time to be
>> announced
>> later, or keep checking the website.
> 
> I did a  Google Earth and it appears to be 11.25 miles south east of
> the  hotel.
>  
> ...a reasonably short cab ride, or for those with rental cars with room,  try
> to let folks know how many you can fit, early enough to gather in the Lobby
> to get there on time. This time I'll make sure I bring extra mapquest
> directions to distribute to those who want them.
> 
>> 
>> Personally,  I do enjoy SPAH, but Jason Ricci's Harp  Blow-Off on
>> the Tuesday
>> night  is such an  incredible evening  of camaraderie and the perfect
>> lead-in...SPAH  wouldn't be remotely  close to as much fun for me if
>> he  didn't plan
>> this as an Annual Event....and all  on his own  dime.
> 
> I love roaming the crowd and checking the looks on the faces as  these
> 'honchos of the harp' do their stuff. The smile on Joe Filisko's  &
> Buzz Krantz's faces are worth the trip.
>  
> ...Ab-so-LUTE-ly...
> 
>> I thank him from the bottom
>> of my  heart for such  a fabulous experience.
> 
> You said it girl. I had been  to blow offs in past years, but there's
> a different magnetism lately.  I felt alive.
>  
> ...I didn't mention a ton of other players, but everyone was so "on" last
> year.
> 
>> I do love that "Sir Jason of the Caffeine Ricci".  Had  me
>> RotflmNYao.  <G>
>> SO accurate. What  would that boy ever have  done without the
>> discovery  of
>> caffeine?  Can't wait for the blow-off,  now that it's  coming
>> together.  Last
>> year's was phenomenal - what  a  brilliant evening...in no small
>> part due to your
>>  delicious saxophone  playing.  Jason's always one to surprise  us,
>> and I expect
>> nothing less this  year  ;)
> 
> Yes, Mike Peloquin was quite a surprise (to me). I knew he could  play
> harp, but the sax part took me off guard. He did a King Curtis  number
> (Soul Serenade) BETTER than King Curtis. I thought I was  listening to
> an old Coasters album.
>  
> ....I'm especially fond of Saxophonists...Michael blew ME away, being
> equally good on both axes...you should check out his myspace site, he also
> sings  
> great - some nice stuff there.
> 
>> To quote PT:  Be there or be  rectangular, lol.
> 
> Whose P.T.?
> smokey-joe
>  
>  ... As if you didn't know...ONLY the guy who was waiting to go on  after you
> at Buckeye, THIS, PT Gazell..
>  
> _Click here: YouTube -  PT Gazell Harmonica verson of "The Thumb"_
> (http://www.youtube.com/watch?v=2KsYa5gOdT0)
>  
> you kidder, you. <VBG>
> 
> Elizabeth
> 
> 
> 
> 
> ************************************** See what's free at http://www.aol.com.
> 
> 
> ------------------------------
> 
> Message: 7
> Date: Sat, 7 Jul 2007 13:28:04 EDT
> From: Philharpn@xxxxxxx
> Subject: Re: [Harp-L] Re: open source = jazz
> To: Harp-L@xxxxxxxxxx
> Message-ID: <bf0.162a5048.33c12724@xxxxxxx>
> Content-Type: text/plain; charset="ISO-8859-1"
> 
> The "open source"   used by jazz players has more to do with chord changes
> than melody lines. There are uncounted numbers of jazz tunes based on the
> chord 
> changes of pop songs.
> 
> The "rhythm changes" which means the chords used in the Gershwin song "I Got
> Rhythm" are used as the basis to improvise many songs. The chord changes for
> the song "I've Got Rhythm" are the basis of much jazz and big band swing
> music. 
> 
> 
> The really cheap and easy way to explore these changes is in
> these changes, there's a great resource by Jamey Aebersold titled "Rhythm
> Changes in 12 keys."
> (Vol. 47. book /CD $14.90).
> 
> What this means is that if you have one of those key of B harps, you can put
> it to use. (And if you need some more help, get Mel Bay's The Complete 10-hole
> Diatonic Harmonica Series by James Major in or all of the 12 keys. Why waste
> time if an $8 book will save you hours of time.)
> 
> This is not the same as using the melody line for the lyric "I got rhythm..."
> as the basis of a "new" song. Unlike most blues songs.
> 
> Bringing up "open source" with allusions to   the classical "variations on a
> theme"   is the old comparing apples and grapes.
> 
> Improvising on chord changes (as the C chord "changes" to F or G7 and so
> forth) is not really "open source" either.
> 
> Chord changes -- like song titles -- can't be copyrighted.   Therefore, there
> can be no infringement of the chord arrangement used in one song by another.
> 
> The problem with blues songs is while most of them are chord based (the
> prominent riff is based on say a G chord shape, so once you fret a G chord in
> first 
> position, you are ready to play all the melody notes in a section) if you j
> ust play the chords you don't get much sense of the tune.
> 
> The Mississippi Sheik's "Sitting on Top of the World" (the basis for Robert
> Johnson's "Come on in My Kitchen") share the not only the same chord structure
> (using the chords G, C7 and D7) but the same melody line.
> 
> In fact, if you had two musicians play the two songs together, you couldn't
> tell them apart. If they were in the same key they would be playing in unison.
> 
> This is nothing like what the classical players used to do with their
> "variations on a theme." They would take a section of music and change the
> notes 
> around so that it was recognizable as the original but also changed in a way
> that 
> if it didn't improve
> 
> 
> Blues players don't change anything around; they just play it as they take
> it. Usuually, note for note.
> 
> 
> Jazz players also don't change anything around, they work on the chords and
> come up with a new melody based on the way the chords fall. (Of course, they
> are always exceptions: but they don't immediately come to mind.)
> 
> The audience doesn't care whether your wrote the song or based it on an
> earlier melody. The audience doesn't care whether you infringe on an earlier
> song 
> -- and judging from the plethora of posts, neither do most harmonica players.
> 
> But if you are a halfway serious musician -- amateur or pro -- you ought to
> know whether you are playing a cover version of a well-known song or a song
> that uses the melody or riffs of an earlier song.
> 
> And how do you know whether a song is based on an earlier song? Everybody
> knows that it's easy to pick up a harmonica and that you can learn to play one
> in 
> an hour.
> 
> You can listen to anthologies or just listen to a lot of blues over the
> months and years. After you a while you will recognize the familiar ones.
> There's 
> really no shortcut. But don't get discouraged, there are only about 12
> different "melodies" or characteristic riffs used in blues anyway.
> 
> Keep on harpin
> The more you know, the better you play
> 
> Phil Lloyd
> tempus fugit, carpe harp
> 
> 
> 
> 
> In a message dated 7/6/07 8:15:51 PM, bogio@xxxxxxxxxxxxx writes:
> 
>> URL from George Brooks:
>> http://www.harpers.org/archive/2007/02/0081387
>> Thanks, George, for a wonderful link.  The author encapsulates much
>> of this recent onlist discussion exquisitely, in particular...
>> "Blues and jazz musicians have long been enabled by a kind of "open
>> source" culture, in which pre-existing melodic fragments and larger
>> musical frameworks are freely reworked. ... Today an endless,
>> gloriously impure, and fundamentally social process generates
>> countless hours of music."
>> 
>> "Open Source" music ... Blues and Jazz, obviously.   Music and Art in
>> general.  Makes abundant sense for me.
>> 
>> Bobbie
>> 
>> P.S.  Hi, folks.  Major computer and financial woes since
>> April.  Glad to be back... hope to make it to SPAH.
>> 
>> _______________________________________________
>> Harp-L is sponsored by SPAH, http://www.spah.org
>> Harp-L@xxxxxxxxxx
>> http://harp-l.org/mailman/listinfo/harp-l
>> 
>> 
> 
> 
> 
> 
> **************************************
>  See what's free at http://www.aol.com.
> 
> 
> ------------------------------
> 
> Message: 8
> Date: Sat, 7 Jul 2007 14:36:56 EDT
> From: MundHarp@xxxxxxx
> Subject: Re: Subject: [Harp-L] Re: Subject: The Last Waltz/Muddy
> Waters, Paul Butterfi...
> To: EGS1217@xxxxxxx
> Cc: harp-l@xxxxxxxxxx
> Message-ID: <d0a.133a71a6.33c13748@xxxxxxx>
> Content-Type: text/plain; charset="US-ASCII"
> 
>  
> I heard Buzz Krantz play "Hoochie Coochie Man" about 10 years ago in  Detroit
> USA..
> It was EXCELLENT..
> John "Whiteboy" Walden
> London
> England
>  
> In a message dated 07/07/2007 18:20:36 GMT Daylight Time, EGS1217@xxxxxxx
> writes:
> 
> Correction:  I just remembered that the song Muddy and Paul   Butterfield
> played together in its entirety was "Hoochie-Coochie   Man".....because I
> kept 
> thinking of Buzz Krantz during it  ;)
> 
> 
>  
> 
> 
> 
>    
> 
> 
> ------------------------------
> 
> Message: 9
> Date: Sat, 7 Jul 2007 15:17:41 EDT
> From: MilwHarmonica@xxxxxxx
> Subject: [Harp-L] Re: SPAH: The Highbury Pub
> To: harp-l@xxxxxxxxxx
> Message-ID: <c5e.165ced8b.33c140d5@xxxxxxx>
> Content-Type: text/plain; charset="US-ASCII"
> 
>  
> Hello, SPAH members. Thanks, Elizabeth, for correcting my corrections of  the
> address of the Highbury Pub.
>  
> I was stating that the Milwaukee area telephone book had a different  address
> than the Highbury website.
> Maybe, as Elizabeth said, I was "too literal" in my listing," but I feel
> that the out-of town people should be informed of discrepancies.
>  
> Also, please don't look in the local Minneapolis, Minnesota newspapers  or
> phone books (as Elizabeth suggested) for a Highbury address in Bay View,
> Wisconsin. I doubt that they would have it listed in Minneapolis.
>  
> Just being literal again. Thanks for your help, Elizabeth.
>  
> John Broecker
> 
> 
> 
> 
> ************************************** See what's free at http://www.aol.com.
> 
> 
> ------------------------------
> 
> Message: 10
> Date: Sat, 7 Jul 2007 17:11:19 -0400
> From: Peter and Connie Ruth <conruth@xxxxxxxxx>
> Subject: [Harp-L] Re: controlling amp feedback
> To: harp-l@xxxxxxxxxx, solo_danswer@xxxxxxxxxxxx
> Message-ID: <17FA2313-C19B-4C1C-90BD-F4A6783D5654@xxxxxxxxx>
> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
> 
> One way to control amp feedback is to put a Graphic EQ in between the
> mcrophone and the amp.  This way you can decrease the frequencies
> that feed back before they are amplified.
> 
> 
> Peter Madcat Ruth
> madcat@xxxxxxxxxxxxxxx
> www.madcatmusic.net
> 
> 
> 
> 
> 
> ------------------------------
> 
> Message: 11
> Date: Sat, 7 Jul 2007 17:57:39 -0400
> From: Peter and Connie Ruth <conruth@xxxxxxxxx>
> Subject: [Harp-L] Hootchie Koochie Mans' Birthday
> To: harp-l@xxxxxxxxxx
> Message-ID: <D86453DD-6B89-4D7B-8296-E1AFB016FAD3@xxxxxxxxx>
> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
> 
> According to Willie Dixon, the Hootchie Kootchie Man was born on the
> seventh hour of the seventh day of the seventh month...  That makes
> today his birthday.  In honor of his birthday, Shari Kane and I are
> going to play "Hootchie Kootchie Man" at our gig tonight.
> 
> Happy Birthday!
> 
> Peter Madcat Ruth
> madcat@xxxxxxxxxxxxxxx
> www.madcatmusic.net
> 
> 
> 
> ------------------------------
> 
> Message: 12
> Date: Sun, 8 Jul 2007 01:02:39 +0200
> From: Frank Evers <frank@xxxxxxxxx>
> Subject: Re: [Harp-L] Re: controlling amp feedback
> To: harp-l@xxxxxxxxxx
> Message-ID: <200707080102.39532.frank@xxxxxxxxx>
> Content-Type: text/plain;  charset="iso-8859-1"
> 
> Am Samstag, 7. Juli 2007 schrieb Peter and Connie Ruth:
>> One way to control amp feedback is to put a Graphic EQ in between
>> the mcrophone and the amp.  This way you can decrease the
>> frequencies that feed back before they are amplified.
> 
> I don´t second this, swapping tubes at least V1 and probably also V2
> is worth a try. V3 hosts phase inversion, changing it might require
> closer inspection.
> 
> http://www.seymourduncan.com/images/84_40.pdf