Lund

Lund... First try an ECC83S in V1 for the first gain stage. For the 6V6, try a #1-3 rating of: http://www.groovetubes.com/product.cfm?Product_ID=1743 The "metal thing" is a filter capacitor. If this does not get you close enough you will need to look into a different amp as this amp was designed to stay clean for bass. Thanks for the fast reply Myles! I will try what you said. This means that i dont need thinking about rebias? The rating you mentioned... 1-3 what does that mean? is that like the most sensitive tube (overdriven very easily) or what? When you say V1 is that the preamp tube furthest away from the powertubes... sorry i am a novice here. I presume that what you suggest is that i start with this, and keep my V2 preamptube stock+ Is the main difference in the overdrive in this area, or shold i go for the entire switch? Your link shows a GT-6V6-R Single... what is the difference between this and a 6V6 GTA? am i safe with ANY 6V6 tube? I presume that i should buy a matched pair? (since my amp has 2 of these tubes). In my country i can get these: Groove Tubes GT-6V6R Duet (Matchet pair) I found the EC883S tube at watford valves, so i will probably order that there. regards Michael

Hello Myles I have a old Fender Bassman 20 combo http://www.ampwares.com/ffg/ (18 watts and 15" speaker) that is made for playing bass, but i use it for guitar. It sounds so good, but i have problems getting it to break up and overdrive... it stays clean all the way up to 10. details: 2 preamp tubes named 7025, 2 output tubes named 6V6 GTA, 1 weird metalthing next to the the 6V6´s called Mallory? i dont know if that is a tube. ampwares site says that it has fixed bias. Should i change all or just the preamp tubes to get natural overdrive? Presently i use a tubescreamer but i would like to get natural tube overdrive. Can you recommend any specific tubes for this amp? do i need to rebias it, or can i just put new tubes in it? i play Texas blues ala Stevie ray vaughan. i would prefer to do it myself, since repairwork is expensive here (i live in Denmark). Best regards from Michael