When reading schematics, building or repairing amplifiers and also buying capacitors, you often must convert between uF, nF and pF. Paper, plastic and electrolytic capacitors are usually expressed in terms of uF (microfarads). Short forms for micro farad include uF, mfd, MFD, MF and UF. Mica capacitors are usually expressed in terms of pF (micromicrofarads) (picofarads). Short forms for micromicrofarads include pF, mmfd, MMFD, MMF, uuF and PF. A pF is one-millionth of a uF. In between a pF and a uF is a nF which is one-one thousands of a uF. Converting back and forth between uF, nF and pF can be confusing with all those darn decimal points to worry about. Below is a uF – nF- pF conversion chart. Just print a copy and tape it to your workbench….it will come in handy. Here is a great site with a lot of information about replacing and identifying capacitors. The site is geared toward old radios but it applies directly to tube guitar amps. Phil’s Old Radios. Capacitor Reference Chart PicoFarad (pF) NanoFarad (nF) MicroFarad (mF, uF or mfd) Capacitance Code 1000 1 or 1n 0.001 102 1500 1.5 or 1n5 0.0015 152 2200 2.2 or 2n2 0.0022 222 3300 3.3 or 3n3 0.0033 332 4700 4.7 or 4n7 0.0047 472 6800 6.8 or 6n8 0.0068 682 10000 10 or 10n 0.01 103 15000 15 or 15n 0.015 153 22000 22 or 22n 0.022 223 33000 33 or 33n 0.033 333 47000 47 or 47n 0.047 473 68000 68 or 68n 0.068 683 100000 100 or 100n 0.1 104 150000 150 or 150n 0.15 154 220000 220 or 220n 0.22 224 330000 330 or 330n 0.33 334 470000 470 or 470n 0.47 474 560000 560 or 560n 0.56 564 680000 680 or 680n 0.68 684 1000000 1000 1000n 1.00 105 Microfarads (mF) Nanofarads (nF) Picofarads (pF) 0.000001 0.001 1 0.00001 0.01 10 0.0001 0.1 100 0.001 1 1000 0.01 10 10000 0.1 100 100000 1 1000 1000000 10 10000 10000000 100 100000 100000000 Here is a chart with the old style color codes on capacitors. 300Guitars Shop My shop is located at 1 Executive Dr Unit L Toms River, NJ 08755 Please feel free to email me if you have any questions or are in need of some tech work. Monday: 10am - 5pm Tuesday: 10am - 5pm Wednesday: Closed Thursday: 10am - 5pm Friday: 10am - 5pm Saturday 10am - 2pm. (I am in every other Saturday). I am also an Eminence, Mercury Magnetics, Mojo Musical Supply dealer. I do all the tech work myself so you deal directly with me. I am a one man shop and my hours can vary so please contact me to confirm that I will be open. Email me: firstname.lastname@example.org Call or text me: 848-218-0362 Shipping Info for all repair work: Please ship all repairs to: 1 Executive Dr Unit L Toms River, NJ 08755 I am currently offering all phases of guitar work which includes: Set-ups Fret dressing Re-fretting New hand cut custom bone nuts & saddles Electronics work And amplifier work which includes: Basic maintenance Bias adjustment Repairs and restorations Modifications And more.... Testimonials: David Nicholas - The 20watt amp is sounding fantastic! Delivered the goods at the gig and I'm finding cool tones all over the place with it. Love the cab w Emenince Tonkerlites too- perfect for my sounds! Makes the 12 string sound like a grand piano! Peter Lacis - I had an audition for something recently that was all about Led Zeppelin I -- my custom Pennalizer BLEW THE MINDS of the guys I was playing with. They couldn't believe the sounds coming out of that amp. That album was never in my mind when I came up with the idea....so that's yet another testament to the amazing work that you do. Scott Goldberg - I am very satisfied with the set-up, and the fast turn around. With the "lower" action it feels easier to play. I will definitely spread the word.