capacitors - id please

[fourmations]

hi all

got all my bits for my "learn funky wiring" project
but i forgot to buy any capacitors, doh!

would maplins have these? they are the most local to me
I tried to search for "orange caps" "sprague"
and a few things but cant find anything

I need capacitors for les paul and jazzmaster and a 335 copy
for trying push pulls, taps etc (i think its .47 for LP and .22 for fender)
also one for a treble bleed mod for the jazzy

if anyone with a bit of know-how would
be so kind as to have a quick look here for me
it would be much apprieciated

http://www.maplin.co.uk/family.aspx?...d=-2&doy=23m10


Regards

4

[mezcalhead]

I put an orange drop in my '61, but pretty much any capacitor will do the job. AFAIK vintage JMs (after the 50s anyway) have ceramic caps like these which should work just fine.

The values seem to be in picofarads so you want to multiply your number by 1000 ie .22 uF = 220 pF.

[fourmations]

thanks for that mez

i got the caps in Maplins (well someone else picked them up)

they gave me 2.7's instead of 2.2's
hopefully these will these still work out?

do you know of any site that is good for learning about guitar wiring

anything i m about to try is from diagrams off the net
(i dont understand it fully, just going to try it out)

I was going to try the jimmy page wiring on my epi LP goldtop
changing all 4 pots to push pulls for series/paralell and coil taps
ambitious!! eh! (or a recipe for disaster!)

rgds

4

[Superfuzz]

I put an orange drop in my '61, but pretty much any capacitor will do the job. AFAIK vintage JMs (after the 50s anyway) have ceramic caps like these which should work just fine.

The values seem to be in picofarads so you want to multiply your number by 1000 ie .22 uF = 220 pF.

mmm..aren't nanofarads in beetween picofarads and microfarads?--> 470 pf-->0.47 nf--> 0.00047 uf
BTW
http://www.electronics2000.co.uk/calc/c ... ancecode=C

it can always help!

[mezcalhead]

AAH!



I have screwed up - Superfuzz is correct of course, .22 uF = 220 000 pF.

To complicate things slightly further, doesn't the Jazzmaster schematic call for .02 and .03 microfarad caps? That would be 20 000 or 30 000 picofarad caps. I've never been able to find that exact value and just use .022 and .033 microfarads.

Likewise, the LP schematic I've got says .020 - .050 microfarads = 20 000 to 50 000 picofarads.

Voltage rating isn't really an issue as the currents in passive guitar circuits are very small.

Sorry about steering you wrong on these .. I'll PM you to sort something out as I might have a couple of spare caps in my bits box.

[uvacom]

Definitely don't worry too much about specific values - capacitor tolerances are usually in the +- 20% range, so anything in the ballpark is fine - the worst that could happen is it rolls off a little more highs than you'd like, then you just switch to a lower value.

[1946dodge]

http://ourworld.compuserve.com/homepage ... elect5.htm

VALUE MULTIPLIERS

In Electronics we use some very large and some very small values.
To make them easier to deal with we use MULTIPLIERS.
For example 1000,000,000,000 Hertz can be labelled 1 Terahertz.
and 0.000,000,000,001 Ohms is the same as 1 picohm

PREFIX                     SYMBOL                       MULTIPLICATION FACTOR
------------------------------------------------------------------------------------------------------
tera                              T                           1,000,000,000,000
giga                             G                           1,000,000,000
mega                           M                           1,000,000
kilo                              K                            1,000
milli                             m                            0.001
micro                           u                            0.000,001
nano                            n                            0.000,000,001
pico                             p                            0.000,000,000,001



See that 1 microfarad is 1000 nanofarad.
There are 1,000 picofarad in 1 nanofarad.
Practice converting one to another.

micro 10^-6, nano 10^-9 , pico 1-^-12
I can never remember nano or pico either and I am an electrical engineer.

[fourmations]

okay

this is starting to make some sense i think
but Im not sure

could someone point me to the ones I need
(.01 ,.022 .047)

I am going there later today and dont want to get it wrong again
http://www.maplin.co.uk/family.aspx?men ... 2&doy=2m11


Many thanks

4

[1946dodge]

The numbers  .01, .022. .046 refer to  microfarads, for guitar.
Something like these:
http://www.maplin.co.uk/Module.aspx?Mod ... bID=1&QV=Y
In particular:
BX00A  = .01 microfarads
YR74R  = .047 microfarads
BX01B    =  .022 microfarads

[fourmations]

hi dodge

thansk a million for that

the site is telling me the BX01B is discontinued!?

is there an alternative there?

many thanks

4

[fourmations]

actually had a look around the site,  came up with these...

http://www.maplin.co.uk/Module.aspx?Tab ... 1&doy=2m11

will these do the job for the .01uf?

thanks

4

[1946dodge]

Yes those would be fine as long as you can solder them (if the leads are long enough). You may want to call their number and come right out and ask them what would be the best ones for the job. Tell them you may want to connect them to lugs on a potentiometer and ground one side to the potentiometer case, so you want something that is the right values and is shaped so it will be easy for you.