My First amp Kit, Building 1968 SPL

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markanthony
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My First amp Kit, Building 1968 SPL

Post by markanthony » Sat Apr 07, 2007 9:47 pm

Nervous you betcha!! Hey its only electricity lol ;-), I got the chassis off sleezebay, the rest from george, going with 100 watt 68 plexia replica with some off shrewards values ;-), Tweak as I go, here is a pic of what I have accomplished today yes Im taking my sweet tine and waiting on other parts.
He gang does this look of so far?? I had to drill some holes, Im just going by pics I seen of 68 SPL for placement!


Change of plans going to do with caps on top, Im not selling this puppy is for me, the caps are 3 32 Uf's single and two 50/50 uf is this corred correct??
thanks
MA!
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Wicksy
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Post by Wicksy » Thu Apr 12, 2007 8:54 am

Was that a blank chassis? I just warn you that you might have trouble fitting some of those can caps next to your output transformer. Though if you have to drill a few more holes it'll give your amp the vintage "hacked and restored" mojo :wink: I had to drill a few holes in my Ceriatone chassis to fit my choke and the old fashioned can cap clips.

Remember the Engineer's mantra: measure twice, cut once
Simon
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rockstah
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Post by rockstah » Thu Apr 12, 2007 11:04 am

my advice would be to go ahead and get one of georges chassis. the style amp u are buling does not have the caps where those holes are. if u have gotten everything elese from george u have great parts. why sit them in some makeshift chassis? my 2 cents. :)

Mark
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markanthony
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ty

Post by markanthony » Sat Apr 14, 2007 5:02 pm

rockstah wrote:my advice would be to go ahead and get one of georges chassis. the style amp u are buling does not have the caps where those holes are. if u have gotten everything elese from george u have great parts. why sit them in some makeshift chassis? my 2 cents. :)

Mark
Its called money lol I got chassis ebay cheap, Im going caps on top, everything is coming together and yes I will do some drillin oher give her that mojo lol thang!! I dont plan on selling its for me<<
Thxs everyone!
MA
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Wicksy
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Post by Wicksy » Sun Apr 15, 2007 5:21 pm

You also tend to learn a bit more i find. I cut everything for my 18 watt chassis myself and getting it right took a bit but was worth it. I did go for the ready done chassis for my JTM 45.
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markanthony
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Hwires

Post by markanthony » Sun Apr 15, 2007 7:23 pm

Wicksy wrote:You also tend to learn a bit more i find. I cut everything for my 18 watt chassis myself and getting it right took a bit but was worth it. I did go for the ready done chassis for my JTM 45.
Hey Guys any suggestions on the heater wires? no Im nervous lol, any suggestions on where to start twist ect would be deeply appreciated

thanks
"MA

Its coming along I do need a plexi plate for back tho, I had to order older type style impedance, and yes I agree I have learned so much in the past two weeks then any school, and yes this is hard work but fun at the same time knowing some day soon I will own a marshall amp and I actually built it ;-)


Hey Mark or anyone will I need to put any resistors on the caps?? On any of the three 32Ufs or 50Ufs?? Im putting on top instead of cap Board!! Thanks again everyone!!
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Wicksy
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Post by Wicksy » Mon Apr 16, 2007 7:22 am

Make sure you have a lot of heater wire, thats all i can say :wink: It takes practise. Follow George's suggestions on the build instructions and with a bit of trial and error you should be ok.

Also, dont solder the pins until you have both wires in place. It can be a right bastard getting it right after that. :wink: Also, check for continuity between the adjacent pins of the tube sockets to the heater pins. Shorts can cause damage.
Simon
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markanthony
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TY

Post by markanthony » Mon Apr 16, 2007 3:36 pm

Wicksy wrote:Make sure you have a lot of heater wire, thats all i can say :wink: It takes practise. Follow George's suggestions on the build instructions and with a bit of trial and error you should be ok.

Also, dont solder the pins until you have both wires in place. It can be a right bastard getting it right after that. :wink: Also, check for continuity between the adjacent pins of the tube sockets to the heater pins. Shorts can cause damage.
\
Thank you mate!! I appreciate any help!! The chassis I got off ebay is not right so I have to drill of course, I know I should of gotten everything from George By god next time I will indeed!!
Its coming along I have more parts on the way then will complete, Im in no hurry lol I want this down correctly and Im reading over and over directions the heater wires, actuall this seems like theee most important part and tedious however it has to be done correctly or I know I have read!!
ok thanks any other suggestions On all ears thanks!
MA
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bluze81
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Post by bluze81 » Mon Apr 16, 2007 4:54 pm

Markanthony if at all affordable I would strongly suggest getting a chassis from George, I know its money, but what the concern is the transformer placement and filter cap placement if not right that can create hum problems? just my 3 cents,my hats off to anybody saving a buck and the amp looks good,so something to think about, nice build.
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Wicksy
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Post by Wicksy » Mon Apr 16, 2007 5:04 pm

If he's strapped for cash, that chassis should be good. You have to cut your teeth some how. Pre punched chassis are nice but sometimes you have to be hardcore and do it yourself! 8) Besides, i doubt Ken Bran et al. worried too much about positions of the transformers and the caps. The probably copied Fender and made the rest up. Those that were too noisy got binned.
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markanthony
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its ok

Post by markanthony » Mon Apr 16, 2007 8:02 pm

Wicksy wrote:If he's strapped for cash, that chassis should be good. You have to cut your teeth some how. Pre punched chassis are nice but sometimes you have to be hardcore and do it yourself! 8) Besides, i doubt Ken Bran et al. worried too much about positions of the transformers and the caps. The probably copied Fender and made the rest up. Those that were too noisy got binned.
I moved OPT and the caps with fit fine, I had to get more parts and now the Uf 50s are back ordered ;-( Hey I can use 100 ufs two of them correct george if you see this post send them out ;-) Putting caps on top, everything is coming together, PTP board pretty much put together, waiting on new SU tranny, and some other parts, I put all the tube sockets in with ground lugs and the resistors across the pins, so its getting there once again no hurry lol ;-) and thanks again for the help!! I now have a Huge respect for Amp Builders and Tech's for sure!!!

Ok easy now, this is my first one, does this look ok?? I know Im ahead of myself waiting on tranny, will get the board finished when the rest of parts come in, plz tell me this looks ok?? Fingers crossed<
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Wicksy
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Post by Wicksy » Tue Apr 17, 2007 11:40 am

Looking good. Try and follow George's instructions for the heater wiring though

http://forum.metroamp.com/download.php?id=866

This picture should help. Its important to get them nice and neat for maximum hum reduction.
Simon
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markanthony
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ty

Post by markanthony » Tue Apr 17, 2007 3:52 pm

Wicksy wrote:Looking good. Try and follow George's instructions for the heater wiring though

http://forum.metroamp.com/download.php?id=866

This picture should help. Its important to get them nice and neat for maximum hum reduction.
thxs M8 redid and cleaned her up tighten her down sorda say!! thanks for the info and pic!!
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Wicksy
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Post by Wicksy » Tue Apr 17, 2007 5:03 pm

No sweat, my first build, a 5F1 champ took 2 metres of red and black wire to get the heaters right. Thats a lot of rewires for an amp containing a solitary 6V6 and ECC83 :wink:
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markanthony
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Post by markanthony » Wed Apr 18, 2007 12:50 pm

Wicksy wrote:No sweat, my first build, a 5F1 champ took 2 metres of red and black wire to get the heaters right. Thats a lot of rewires for an amp containing a solitary 6V6 and ECC83 :wink:
Thxs well some other parts showed up ;-) back to work Pt is here, board pretty much complete, Im going to us a 33 Uf in the middle of the board, are there any resistors I need to put on the dual 50's?
Man this is fun but I tell ya its work whomever says its not is wrong lol Huge Respect for these gents now!!!Plus learning the ins and outs, which every Axe player should know!! thxs for the support I do appreciate it!!
MA
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