AMpeg output transformer
I have a NOS output transformer for several flip top models. Any that ran a pair of 7027. Part number is OT471. All the codes: 895C021 OT-471 682 346 Never used, this is a transformer potted in the...
View ArticleFender Twin of the ProTube (sometimes called the Evil Twin) with very low output
Hi gurus. This is my first post and Im hoping you can help me out. This problem has me stumped. The amp is a Fender Twin of the ProTube era of 2003, sometimes called the Evil Twin. Heres the...
View ArticleHelp with weird buzz
Question...I've got a Celestion Blue 12 made in UK I bought new some 15 years ago and placed it in an Avatar open back 17" cabinet. It hasn't been used much in all that time (20 hours max) and...
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Strange oscillation?
Ahem... I know I often have weird difficulties. I like to think that's because I have little trouble diagnosing normal problems ;) So here goes... I'm working on a Champ-ish right now. All was fine...
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Roland Cube 40 Repair advice needed
Have a roland cube 40 amp DOA. Both internal 4amp fuses blown. My first check was the pair of output transistors Q11/Q12 NEC D586. Both where dead. After that, I got the schematic to trace what the...
View Article7 Years
Hey all, Today is my wife and I's 7-year wedding anniversary and 16 year's together. It's a beautiful day! Just want to share something positive with you all and wish everyone a great day! I wanna say...
View ArticleAshdown MAG200 Dead - Blown Main Fuse
Hi I've just acquired an Ashdown MAG200 combo (C410T-200) which is completely dead. I've not spent a lot of time on it yet, but so far I've discovered that the main fuse has blown, two of the four...
View ArticleSafe to use 6L6/5881 with 120mA rated PT?
I have a Thordarson T13R14 which, as far as I can tell, is rated for 120mA HT (350-0-350@117Vac), and a 4.7A 6.3Vac filament supply. There is a 5V winding as well, but I cannot find the complete...
View ArticleBolts......Argh! Bugera V22
So loading into the club Saturday night I noticed six 2" long bolts laying loose under my V22. I didn't have time, light, tools, eyesight, or patience to deal with it so I just set up and played... 5...
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Choosing a vintage recicled PT for 5f11 project!
Hi there. I have this three trannyes for my Fender 5F11 project. I wonder if any is suitable for the job? from left to right> Original PT from a Gibson GA30RVT amp. PRI: 120V SEC: 6.3V-0-6.3V / 5V-0...
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My new (old) winder...
So, I've been using one of the original Schatten winders since March 2006. At he time it was a convenient way to get a winder, since I didn't have a workshop handy. It did the trick, but the motor was...
View ArticleMackie RCF ART300A Loud Speaker Hum
Hi, was hoping some of you may be able to lead me in the right direction. I have a RCF 300A where the tweeter is working fine. the speaker blew quite some years ago but have been running it in a...
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Peavey MP4 Reverb Help
Hi: I have a Peavey MP4 mixer that initially had a loud hum as you increased the master reverb (Effects Bus). I tried swapping U4 and U5 but made no difference. After looking around, the ground on the...
View ArticleWhat mosfet to suit/order
Hey, this is most definitely a simple question that a lot of you will know the answer too, i however don't! I have a faulty mosfet on a Mackie RCF 300a Amp On the actual mosfet installed into the board...
View ArticleWhat brand you find to be an overall better quality coated string?
Have a "tremol no" equiped guitar and use it as a fixed bridge! Want to order 20 sets of guitar strings. That's how i'l get a good discount! I use coated strings. 11-49/48, because i can strech them...
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Marshall VS100 Combo Terrible Fizz Sound When Playing
My latest challenge. I need help trying to repair my VS100. When playing guitar every note sounds very FIZZY. Problem is on both clean and gain channels. At first I thought it was a bad speaker, but...
View ArticleTraynor YBA-2B Chassis Mystery
I'm working on my first Traynor combo, a later YBA-2B with EL84 power tubes. My question is simple and embarrassing: how do I get the chassis out of the cabinet? I can't push it out the front because...
View ArticleCrate GX-15 not outputting sound anymore
Hello all, and sorry if this is a repeat question. I did a quick search of the forums, but didn't find anything specifically helpful. Here's what's going on: A few weeks ago I was having a jam session...
View ArticleTV repair
Hey all, Trying to fix a Sony NSX-40GT1 LED tv. It's definitely a SMPS issue. Has anyone on here worked in TVs before? I'm trying to find the schematic for the SMPS, but the Service Manual I found...
View ArticleIbanez DM2000 Digital Delay Problem
Hi there, newbie to this site. I have an old Ibanez DM2000 rack delay that I've had for years and I recently got it back out and hooked it up. I forgot about the noise problem it has. The dry and...
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