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Author Archives: t-geek
Silverface Fender 12AT7 burns ! (reverb)
Why does this 12AT7 burn ? Cathode resistance value too low ! Please see my post on my other web site here : http://www.it11audio.com
Posted in Amps, Music Gear 1 Comment
Xits X4
Nice amp on the bench ! A kind of Vox AC4 with excellent components (Mercury Magnetics transformers, SoZo capacitors ….)
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Hiwatt DR103 : crunch mode mod !
Here is an Hiwatt DR103 a customer wanted to be modded « a la Jimmy Page ». I proposed a slightly more easy and reversible mod … So, here we go !
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Marshall JCM900 2100SLX less bright mod
As many Marshall, the JCM900 2100SLX sounds VERY bright, outch ! So, I removed the 1nF bright cap (called …R22 !!!) and that is how it sounds now : Easy mod, you can even cut one leg of R22 ! … Continue reading
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Carslbro 50 TOP
I got this Carslbro 50 TOP to fix (burnt OT). OT : Drake 784-213 (4.4k Zaa) Schematic (thanks Chambonino !) The point is : on « my » 50 Top, power supply is quite different : PT has a central tap … Continue reading
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Stramp 2100A
As used by Rory Gallagher and Leslie West … Actually, even if Rory played on Stramp amps, I’m not sure he used this model … Huge capacitors and transformers … ‘70s PCB, that can be accessed from inside and outside … Continue reading
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Vampower
(thanks to http://www.chambonino.com) See http://www.vampower.com for more information
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Miles Platting amp
I got this amp for a complete check-up. 50W, 3 x 12AX7, 2xEL34, 1 GZ34 End of ‘60s, beginning of ‘70s I think … Miles Platting amps were made by Wilsic Here is a Wilsic 50W (picture from … Continue reading
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Fender Bassman Silverface circa 1967
A nice Bassman to check : From top to bottom : Bassman ’67,Bandmaster ’68, Bassman 100 ‘75 bassman_ab165_layout Earth OK, no Deathcap : good ! AB165 schematic DripEdge, blacklines, Schumacher (606) transformers and choke from 1966 and … Continue reading