Music Electronics Forum http://music-electronics-forum.com/ This is a discussion forum about building , modifying and maintaing musical electronic devices such as guitar amps and effects. en Mon, 06 Sep 2010 03:40:23 GMT vBulletin 60 http://music-electronics-forum.com/images/misc/rss.png Music Electronics Forum http://music-electronics-forum.com/ Massie 1263 http://music-electronics-forum.com/t21401/ Mon, 06 Sep 2010 03:33:15 GMT I'm looking for other owners or a schematic of a St George By Massie Model 1263 half stack. It has a broken lead on a capacitor in the tremolo channel, and I cant figure out where the capacitor was leading to. Any help would be appreciated. Thanks ]]> Schematic Requests japaris http://music-electronics-forum.com/t21401/ switching system for a strat http://music-electronics-forum.com/t21400/ Mon, 06 Sep 2010 01:41:09 GMT Hello,

I'd wish to try to use three miniswitch to control each pickup, having serial, parallel and OFF in the center position. After some try, I can't find a good solution.
Any advice?
Thanks
m.p. ]]> Pickup Makers Marco Pancaldi http://music-electronics-forum.com/t21400/ EL34 to 6L6 impedance question http://music-electronics-forum.com/t21399/ Mon, 06 Sep 2010 00:41:25 GMT If am amp has a OT optimised for EL34's and an 8 ohm output only what load would be optimal if I switched to 6L6's? Is it a minimal difference? Thanks Bob ]]> rockon1 http://music-electronics-forum.com/t21399/ Crate K80XL http://music-electronics-forum.com/t21398/ Sun, 05 Sep 2010 22:45:06 GMT I'm in need of a schematic for a Crate K80XL, if anyone has one they could send I would be very appreciative.

Thanks!
Hasse ]]> Schematic Requests hasserl http://music-electronics-forum.com/t21398/ Tuibe Power Amp kits http://music-electronics-forum.com/t21397/ Sun, 05 Sep 2010 22:08:00 GMT Thinking about building a tube power amp this winter and I just started looking into this. Any suggestions on good kits or companies to deal with? ... Thinking about building a tube power amp this winter and I just started looking into this. Any suggestions on good kits or companies to deal with?

Thanks

S~ ]]> Kit Amps Gtrshop http://music-electronics-forum.com/t21397/ Noob alert... http://music-electronics-forum.com/t21396/ Sun, 05 Sep 2010 22:06:10 GMT Hey there...first post (well actually 2nd, but who's counting) for another MusicElectronics noob. Been playing circuits and bars, special events and the like for over 3 decades now. Gear has ranged from Hiwatt stacks (DR103's) to Marshall Valvestate combo and a couple cool old Harmony tube amps to my current POD XTL rig. Guitars are mostly Les Pauls with a Strat in there for the obligatory "strat-type" tones. Also use a Mellowbar lap slide for the odd tune. Suffering from a major case of G.A.S. at the moment looking for a 70's or 80's Dean Z...at something less than the museum price they seem to be getting. I do my own guitar mods and repairs, and have built effects from scratch. This winter I may build myself a tube amp just to say I have. Would be nice to have glowing tubes behind me again :thumbsup:

A computer tech by day, classic rocker after the bell... I've worked in music retail, consulted and configured DAW's, had my own project/demo studio. Currently playing lead guitar and keys in 2 classic rock bands.

Nice to meet you all!

Cheers, Steve ]]> Music Electronics Gtrshop http://music-electronics-forum.com/t21396/ Diode number what is this? http://music-electronics-forum.com/t21394/ Sun, 05 Sep 2010 20:34:49 GMT I have about 200 diodes in a bin that I can't identify.
I think they are a 1N914 equivalent but can't pin them down.
glass is Blueish in color black strip.
Numbers as you read around
13
1
G
Q3
Looked on INTERNET tried different number combinations. ]]> Music Electronics Techknowman http://music-electronics-forum.com/t21394/ Deluxe Reverb Reissue 1st Filter cap http://music-electronics-forum.com/t21393/ Sun, 05 Sep 2010 16:04:12 GMT I'm looking at the schem for the DRRI and am a bit confused about the power supply...
Immediately after the rectifier there is a 220mF cap in series with a 47 mF cap.The 220 is paralleled with a 100k resistor, and the 47 is paralleled with a 470k resistor.From my understanding, this should give 38.7mF of capacitance.
Where I am confused is this....according to the schem , the 220mF cap is rated at only 100V, but the HT at this point is about 400VDC.How can this cap survive?
The 47mF cap is rated at 500v. The schem is on pg6
Any comments appreciated as I'm trying to learn.
The original Deluxe reverb ab763 used two 16mF caps paralleled in this spot.
http://www.schematicheaven.com/fende...erb_manual.pdf ]]> Dan T. http://music-electronics-forum.com/t21393/ Leilani amp by Gourley question http://music-electronics-forum.com/t21392/ Sun, 05 Sep 2010 15:50:08 GMT I am in the process of repairing a beauty Leilani amp from 1956, I believe, based on the speaker code.This purple and gold MOT lovely has a 6SJ7,... I am in the process of repairing a beauty Leilani amp from 1956, I believe, based on the speaker code.This purple and gold MOT lovely has a 6SJ7, 6V6, 5Y3 line-up, with no on/off or volume control. I have recapped it and although it is still sounding somewhat weak, considering it is going flat out all the time, it is sounding pretty good. The speaker itself is fine.
There is a strange Flash Gordon looking device between the input and the preamp tube. If I bypass this the amp howls and whistles.

Can anyone tell me what this is? I have searched the site for similar questions but can't locate any, although I vaguely recall one last year.
Thanks
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]]> Resonator Guy http://music-electronics-forum.com/t21392/ Unwanted compression http://music-electronics-forum.com/t21391/ Sun, 05 Sep 2010 14:50:00 GMT On my Mace VT if I turn the pregain up to 10 the sound gets compressed and very bassy, with it on 9 it has a very full sound and decent distortion... On my Mace VT if I turn the pregain up to 10 the sound gets compressed and very bassy, with it on 9 it has a very full sound and decent distortion but would like to have better distortion. Once you get the pregain past 9 1/4 it starts to mush up and get compressed and bassy, I am not running any boosters on the input and the pickup is a Duncan Custom ( PAF on Steroids with a ceramic magnet ). I am wondering if the pick up is too hot for the gain stage? Would changing the R1 from a 22K to a 50K help? Or is there a better remedy that will allow the solid state preamp to have better distortion and not compress it? Thanks ]]> skynyrd http://music-electronics-forum.com/t21391/ AB systems ER2050LX amp schematic needed http://music-electronics-forum.com/t21390/ Sun, 05 Sep 2010 13:47:28 GMT AB Systems ER2050LX schematic needed. I managed to get it running but the clip light for one channel doesn't work. LED is fine so the problem is else where. I have googled and tried my usual resources and yes yes i can call them AFTER the holiday weekend but I would like to get it off my bench today if possible!


email it to tetech2@doitnow.com


Thanks


Zc ]]> Schematic Requests zero cool http://music-electronics-forum.com/t21390/ Super Lead clone - lack distortion inside head box http://music-electronics-forum.com/t21389/ Sun, 05 Sep 2010 10:41:03 GMT I built a Super Lead clone (Metro Amp) way back. And it has this strange "application"; as soon as it gets inside the head box some amount of distortion disappear. Tried "chop stick"-poking all the wires and components. No cracklings. Tubes seems fine.
What I am left with is the metal plate at the inside bottom of the head box. Good for cancelling interference. Noise reduction and maybe better grounding (not all convinced about that - but it is a guess). Could this plate also reduce distortion? And if so; why?

It is just that my amp seems to like the open air...

Any help is appreciated ]]> Debugging Your Build Omn http://music-electronics-forum.com/t21389/ <![CDATA[Whats the diffrence in Building Valve Amps & Valve Amplifiers By Morgan Jones?]]> http://music-electronics-forum.com/t21388/ Sun, 05 Sep 2010 07:43:29 GMT I have Valve amplifiers allready but i would like to know what his other book has in it that is very diffrent from the one i have. If you were to... I have Valve amplifiers allready but i would like to know what his other book has in it that is very diffrent from the one i have. If you were to pick, which would be the best at learning how valve theory worked in real world situations.
Thanks! ]]> AudioWorks http://music-electronics-forum.com/t21388/ <![CDATA[Johnson Millennium 250 Head & J12 Pedal Board]]> http://music-electronics-forum.com/t21387/ Sun, 05 Sep 2010 06:26:11 GMT Up for grabs is a Johnson Millennium Head and a J12 pedal board. Details here... Up for grabs is a Johnson Millennium Head and a J12 pedal board.

Details here. ]]> Flea Market FredB http://music-electronics-forum.com/t21387/ VHT Two/Fifty/Two http://music-electronics-forum.com/t21386/ Sun, 05 Sep 2010 06:23:43 GMT Up for grabs is a VHT Two/Fifty/Two Stereo Power Amplifier. Details here (http://fredsstuff.weebly.com/vht-twofiftytwo-stereo-power-amp.html). Up for grabs is a VHT Two/Fifty/Two Stereo Power Amplifier.

Details here. ]]> Flea Market FredB http://music-electronics-forum.com/t21386/