Correct biassing is very important for good tone and a reasonable lifetime expectancy of the power tubes. When the power tubes are replaced the bias current (almost always) needs to be set correctly again. We have often heard from many customers they should have had this done years ago.ĭr.Tube is very well stocked in high quality electrolytics for use in tube amps. A lot of people do not realize/know this. The effect of fresh electrolytics can be very pronounced. If, however, one or more of the other caps are not OK, we replace these too of course. When we recap, we do not replace all the capacitors, just the electrolytics, as film (plastic), ceramic and mica caps usually can last many tens of years. Brands like Illinois Cap (we call these illinoise crap), Samwha, Teapo (cheapo), etc, come to mind. There are modern electrolytics which really should be replaced the second the amp leaves the factory. So with a lot of older amps it is high time to replace these electrolytics, even if they look OK. Our experience is that electrolytics have a maximum life time expectancy of around 10 to 15 years. A guitar amp with worn and dried up electrolytics can: Due to the way electrolytis are constructed and the high temperatures present in tube amps, electrolytics also have a limited lifetime. Recapping is replacing the electrolytic caps (electrolytics). The wearing out of the tubes is a gradual process which means that you easily get used to the lesser sound.
A guitar amp with old and worn tubes can:
Tubes are subject to wear and tear and have a limited lifetime. A subtle but huge difference!ĭr.Tube has more than 30 years of experience repairing, amongst others, the following brands of guitar amps:Īguilar, Alembic, Ampeg, Ashdown, Bad Cat, Bedrock, Blackheart, Blackstar, Bogner, Bradley, Brunetti, Budda, Bugera, Carlsbro, Carlton, Carvin, Castle, Concord, Conquest, Crate, Custom Audio, Dean Markley, Diezel, Divided By 13, DV Mark, Dynacord, EBS, Eden, Egmond, Egnater, Eko, Elk, Engl, Epiphone, Fane, Farfisa, Faylon, FBT, Fender, Floyd, Framus, Fryette, Gallien Krueger, Geloso, GEM, Gibson, Guyatone, GuyTron, Hartke, Hayden, HiWatt, Hohner, Holland, Hook, Hughes & Kettner, Ibanez, Jackson, Jet City, Kinder, Kitty Hawk, Klemt Echolette, Koch, Kool, Kustom, Laney, Legend, London City, Marshall, MatAmp, Matchless, Mesa Boogie, Morgan, Music Man, Orange, Palmer, PCL, Pearl, Peavey, Peterson, Power City, Randall, Red Bear, Rivera, Roland, Roost, Royal, Schaller, Selmer, Simms Watts, Soldano, Sound City, Sovtek, Stramp, Sunn, Super City, Supro, SWR, THD, Trace Elliot, Traynor, Two Rock, The Valve, Univox, VHT, Vox, Warwick, Watkins / WEM, Yamaha, Zzz…Ĭommon guitar amp repairs at Dr.Tube are: Retube Contrary to the vast majority of other repair shops, who find it is sufficient to repair to the level of “it works again”, Dr.Tube goes the extra mile to make an amp not only “work again” but also to make it really sound good again. Dr.Tube is the specialist in the repair of (tube) guitar amps and other interesting music related analog (non tube) electronic audio equipment.
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