what are these extra resistors/fuses to the right of my 5e3?

[tubescent]

i've been looking at the schematic and there is something on the left side of the board of my 5e3 that i don't understand. what are the extra capacitors and fuse to the left of the filter caps? anyone?
[http://i936.photobucket.com/albums/a...my5e3board.jpg
this pic is from some the guy i bout it off gave me of the build. there are two fuses in place now that it's inside the amp.

[rudutch]

picture link inop

[tubescent]

apologies -it's right now

[Tom Phillips]

One of the fuses is likely in the HV line but without seeing the circuit, it's hard to tell what the remaining parts are for.

You could post more pics of the finished product.

Was the board made in Canada?Local code requires more fusing than used in other places and maybe the maker was trying to comply.
Do you have links to a web site that sells this product or was this a one off custom build?

[Jazz P Bass]

PTP Board

Nice board layout.
Your best bet would be to follow where the fuses go To.
Take it from there.
How about a pic of the bottom side.

[Tom Phillips]

In you first post you said you were looking at the schematic. Can you post that for us to see?

[tubescent]

here's some more docs that came with the amp plus another pic
http://i936.photobucket.com/albums/a...tic_Page_1.jpg
http://i936.photobucket.com/albums/a...tic_Page_2.jpg
http://i936.photobucket.com/albums/a...tic_Page_3.jpg
http://i936.photobucket.com/albums/a...tic_Page_4.jpg
http://i936.photobucket.com/albums/a...tic_Page_5.jpg
http://i936.photobucket.com/albums/a...tic_Page_6.jpg
http://i936.photobucket.com/albums/a...gs_Page_18.jpg

i don't have a camera to hand to take a pic but will get one from work next week. i have been looking at the weber schem/layout as that is what i am a bit familiar with but before i did a bit of tweaking this section popped out at me and just thought i should check what it's about.

[tubescent]

actually i've just worked out that they are schems from fender's website for the '57 deluxe re-issue. i remember seller mentioning that he used them to build the amp. i have built a 5f1 before and thought i new what was going on with a 5e3 but this bit has me baffled. is it a way of discharging the caps on switch off? should i leave them there? i wanna do a bit of tweaking and add a couple of switches.

[Tom Phillips]

Looks like the builder made a nice looking turret board and copied the Fender 57 Deluxe re-issue circuit. The re-issue circuit does have some parts that were not used in the original. The parts you asked about appear to be:
1) Fuse in the 5V heater supply.
2) Fuse in the 6.3 V heater supply
3) Negative Temperature Coefficiet (NTR) resistor in the AC input line acting to reduce inrush current at turn on.
4) Noise suppression capacitor across the input line hot & neutral.

Most people don't add that stuff when making a 5E3 clone.
There may be some ultra purists out there who disagree but I don't believe any of this will have a negative affect on the sound of your amp.

HTH,
Tom

[Tom Phillips]

There may be some ultra purists out there who disagree but I don't believe any of this will have a negative affect on the sound of your amp.

I forgot to add "...if the final build has good lead dress and proper grounding"
The Fender build lead dress has lots of room for improvement.

Regards,
Tom

[Jazz P Bass]

Fender 5E3

The fuse on the left is the B+ voltage. Marked F2.
The fuse on the right is Heater Voltage. Marked F3.

[TD_Madden]

i've been looking at the schematic and there is something on the left side of the board of my 5e3 that i don't understand. what are the extra capacitors and fuse to the left of the filter caps? anyone?
[http://i936.photobucket.com/albums/a...my5e3board.jpg
this pic is from some the guy i bout it off gave me of the build. there are two fuses in place now that it's inside the amp.

That picture is a mirror-image by the way....

[tubescent]

TD_Madden : i mirrored the image as it looks that way from the back of the amp (i didn't take the original photo)

so are these extra fuses and whatnot good to add to all builds? (gonna start one tomorrow)
and do you have to vary the setup if you do single ended or can these be added easily to other designs?
do they create any drawer backs?
sorry for questions but i thought i had my head round tweed amps and now these crop up.

[loudthud]

The purpose of the fuses is to provide protection if a short should occur in any winding because the main fuse might not blow. It's easy to cause a short at the pilot light if you have a vintage style pilot light socket. The wires to the transformer will melt in seconds possibly causing the amp to catch fire.

Product liability being what it is, you may be faced with a law suit where a building burns down or people are killed and a small town fire marshall with no real training points a finger at your amp saying that's where the fire started. Then you have to prove that your amp didn't start the fire. Good luck with that jury. If your amp meets safety agency guidlines, you might have a fighting chance. If it's actually approved by a safety agency, the case might get dismissed or you could get insurance that will cover you.

[scole]

It's easy to cause a short at the pilot light if you have a vintage style pilot light socket.

is this because the solder lugs are exposed on that style pilot light? or is there something else wrong with them?