Photo of the Day
Shoutbox

Mrblob4: Help, quarantine is hell
319 days ago

dh4: FENDER MARINE
306 days ago

bigtikidude: Cheers
218 days ago

elbortobandito: surfybear trem power
216 days ago

BlindBlake: surf music discography
212 days ago

thewhipandthebody: It's MONDAY! Smile
210 days ago

2nanfer: Guys asking for help bc of quantine, 144 days ago. Uh-Oh
175 days ago

sysmalakian: Surf's up!
173 days ago

taku: sale
88 days ago

Skiltrip: SurfyBear is Life
80 days ago

Please login or register to shout.

Current Polls

No polls at this time. Check out our past polls.

Current Contests

No contests at this time. Check out our past contests.

Donations

Help us meet our monthly goal:

23%

23%

Donate Now

SG101 Banner

SurfGuitar101 Forums » Gear »

Permalink The Surfy Bear Fet Reverb

New Topic
Goto Page: Previous 1 2 3 4 5 6133 134 Next

bjoish wrote:

Hi Crumble.

I recommend that you connect the DC jack to your power supply and then measure the voltage on the pins on the jack. This way you can make sure you get the polarity right.

If you don't yet have a power supply what should one be looking to order. With the greatest resect to you, not everyone understands schematic diagrams. In my ignorance I have trashed a couple appliances by using incorrect power adapters.

If I read the schematic right, the power supply should be center negative, i.e. image

Old punks never die... They just become surf rockers.

crumble wrote:

If you don't yet have a power supply what should one be looking to order. With the greatest resect to you, not everyone understands schematic diagrams. In my ignorance I have trashed a couple appliances by using incorrect power adapters.

My experience is that modern 12V DC 1A (or more), switch mode power adapters works very well. These deliver normally a stable, well regulated DC voltage and are not expensive.
This type of adapters are often used for LCD monitors or backup HDs for PCs. Maybe you already got one Smile
I have also some info about power adapters on my website.

Hi All
yes the power supply must be positive outside like Lee Van Cleef show, but as Bjoish says mesure it when it is plug in the socket with your multimeter ,it avoid a wrong polarity to the fet reverb and a 1n4007 burn (the pcb is secured hopfully you re not burn it )you find the + and the - on the connecteur and you can put a red wire for the + and a black for the -

then today i take time to buy some thing for my box
image
the price 10.4 € for the pine 2 m x20 cm x 18 mm pine is not cheap !
black vinyl 3.45 € 1 m x1, 40 m
grey cloth cause i can find grill cloth i will order at the same time as my tank 30 cm x 1m40 3 € but it will remplace it the times my order come
chassis U fram aluminium size 400 mm x 60 x120 mm 10 €
then i have some pin stick to make the inert brace (free)
now only need to order some chicken head knobs ,an handle and my tad pan and a little part of silver fender grill clothe

https://www.facebook.com/thesharkslaw/

So good 12v 1a power adapter of any polarity and the wires on socket changed to suit. I got a little lost in translation there, no harm done Smile thank you.

yes but remember to use it only with the fet reverb cause if not and the other effect as not the good polarity you can burn it

https://www.facebook.com/thesharkslaw/

There is also the option to use a LM7812 regulator IC. These will give you a regulated 12V DC output, and since they are originally designed to convert AC to DC, they will give you the correct output polarity whatever the input polarity (i.e. the circuit will work even if you use a power supply with the wrong polarity). The trade off is that they require a tad more input voltage to deliver a regulated 12V output, but they will accept a wide range of input voltages -- 15V to 27V DC, so you could use an old laptop PSU.

image

Old punks never die... They just become surf rockers.

LeeVanCleef wrote:

There is also the option to use a LM7812 regulator IC.

Yes, but if you want to use this type of regulator, make sure to handle the power dissipation using a heat sink.

ludobag wrote:

yes but remember to use it only with the fet reverb cause if not and the other effect as not the good polarity you can burn it

Yes, this is important !!!

Good post about the polarity on the wallwart power supplies. Interesting as I have never seen one that the +ve was the outside and the -ve was the pin.
I havent looked at the schematic so this is good info. Thumbs Up

I am not obsolete, I am RETRO.... Cool

Teiscofan wrote:

Interesting as I have never seen one that the +ve was the outside and the -ve was the pin.

Center-negative is the standard for effect pedals (except for some old fuzzboxes and a few quirky effects).

Ordinary household appliances, on the other hand, typically use center positive power supplies. If you have one of these, simply solder the wires backwards to be able to use it to power your pedals.

Now, what I'd do is conceal the PSU inside the reverb's cab (as far as possible from the circuit to minimize the risk of EM noise) and run a regular power cord to the mains, so that it would look even more like a tube tank Wink

Old punks never die... They just become surf rockers.

Last edited: Jul 17, 2014 20:09:46

LeeVanCleef....Well Ill be darned! I went and checked one of my Boss pedals and your right! (I bet you knew that.....lol). I have always run the pedals off batteries so never worried about a power supply.....Well its true then, you can teach an old dog new tricks.....Thanks Cheers
BTW awesome forum name,he is my favorite actor.
Cheers

I am not obsolete, I am RETRO.... Cool

printed and varnished
image
proud to have a fet reverb Wink

https://www.facebook.com/thesharkslaw/

ludobag wrote:

printed and varnished

Looks awesome Smile
Can you explain the process and what material you used?

I have plans to try screen printing but that process is a bit difficult.

it is a sticker that i print in fact ,it is sheet of transparent paper
it work when the backgound is not black cause a home print can't print white
for the reverb the back is aluminium then it it will be black and aluminium
image
you print the logo ect ... let it dry ,then one or too coat of varnish wet but not too much cause it may have a risk the varnish attack the ink
and after you cut and glue on it
screen priting it not for one piece cause you have to make the fram for each logo (and if you have more then one color it is a frame by color more over) but it is the only way to have something in white
with the sticker you could have something white if the back is white or you glue on a white cheet of stickers or paint a little part like this
image
close it is not perfect but at ten cm it do the tricks ,for the lettering in gold it is a posca gold pen
for exemple if i want the control tone dwell and mix in white same operation
printing ,varnishing ,drying but after it is more complexe cause you have to pull at the protection paper and with a posca white for exemple coloring in white what you want (need to be precautionnous but it works)
i have an exemple
image
i think it is with a white sheet sticker behind (don't remember too old)

https://www.facebook.com/thesharkslaw/

Last edited: Jul 18, 2014 10:36:50

Here's another method from the Uncle Doug YouTube series. Works pretty good!

Bill S._______
image

HELLDIVER on Facebook

don't know if i let the lettering aluminium or white ?just to put a white sheet before to have white
it is just the try with no varnish on (a scap of printing)
image
image

https://www.facebook.com/thesharkslaw/

Aluminium for traditional look.
White for clean look.

Both look good but for me I'd chose white to be different Smile

Or flip a coin!

white with black is classic fender Wink
in the box and i have test another alimentation seems really promising cause it cut a hum that i have with mine and you don't have more noise than the amp make alone
image

https://www.facebook.com/thesharkslaw/

Last edited: Jul 18, 2014 16:03:54

Dread,
This enclosure idea for the circuit board is great! As long as the RCA leads do not themselves pick up any hum (maybe top-shelf shielded cables will do) you could place the pan in a bag anywhere convenient, as long as it's not close to any powerful transformers, and it will stay quiet.
_DreadInBabylon wrote:

image

Squink Out!

Goto Page: Previous 1 2 3 4 5 6133 134 Next
Top