marT build #2 - Bluesbreaker - FINISHED!!! see page 5.

neikeel · Post by **neikeel** » Thu Jun 28, 2007 7:17 am

I have just acquired a pair of Celestion Golds for doing just what you have done but I am going to use my 50watter.

Anyone bought a Tube Amp Doctor Cab??

marT · Post by **marT** » Fri Jun 29, 2007 4:43 am

ITS FINISHED!
Well sort of, I am still waiting on 3 .1 sozo's but I can wack them in in 2 seconds.

I wired up the pots first, I decided not to include the 500pf on the high treble channel. The last build I did felt just a tad too bright. Its easy enough to put one in later anyway.

Then I wired up the power to 240v for "safety" specifications. I hope I did this correctly.

And.. the final product!!

Its going to be a very long wait for those sozos and speakers!!

el34on11 · Post by **el34on11** » Fri Jun 29, 2007 7:46 pm

Hey marT......

That looks awesome...........

Another nice build............Great job
Hope your caps and speakers get there soon so you can really enjoy your amp..........

Derrick

Wallace · Post by **Wallace** » Mon Jul 02, 2007 9:28 am

Wow! that's really neat.
Congratulations.

marT · Post by **marT** » Thu Jul 05, 2007 12:48 am

Today I added the swap resistors. I figured since I would be using valveart KT66's it was pretty much a must do thing.

Still waiting patiently for my speakers and caps. The speakers are on their way and I am hoping I will get them next week sometime. The caps I am not sure of but hopefully soon also.

marT · Post by **marT** » Thu Jul 05, 2007 4:26 am

THE MISSING CAPS HAVE ARRIVED!!

but unfortunately I am going out tonight. tomomorrow I will put them in and the build will be officially finished minus some speakers!

marT · Post by **marT** » Thu Jul 05, 2007 9:57 pm

Well the caps have been installed so its done!

I just checked online tracking and it says the speakers have cleared customs so next week I should get my speakers, hopefully earlier rather than later.

I picked up a cheap jack from dick smiths which is the equiv of your radioshack in the US. I was wondering if it will do the job fine for the speaker hookup?

I have some two stranded power cable here that is said to be good for speaker hookup, I might take some pictures of that later aswell to see if its suitable. I have never hooked up speakers so its all a bit new to me.

Also on the subject of speakers. Should I solder the wire directly to the speaker terminals or should I use those terminal connectors that crimp onto the wire?

Cheers.

toner · Post by **toner** » Thu Jul 05, 2007 10:23 pm

Looks good marT!

That 1/4" plug is fine for the speaker cable. There are sturdier plugs like Switchcraft but that's no big deal, especially in a combo where you won't be unplugging it all the time.

As for the speaker terminals, I prefer to solder them but either way will work.

I look forward to hearing it!

marT · Post by **marT** » Thu Jul 05, 2007 10:26 pm

Here are the wires I have access too but don't know if they are suitable.

I am leaning towards the insulated one as it seems a bit thicker.

I know the pictures aren't great and probably don't show much.

I can always go and buy speaker cable as its cheap enough but this stuffs around so why not?

toner · Post by **toner** » Thu Jul 05, 2007 11:51 pm

Did you break into your local Smith's warehouse for those spools? Be honest now!

18 gauge or larger is fine. I can't tell what you have there from the pictures. 16 or 14 gauge is theoretically better but in a low-power guitar amp it's not a big deal.

marT · Post by **marT** » Fri Jul 06, 2007 12:03 am

So is forming really not necessary with these new caps?

I have to wait around for my speakers so letting it form for a day is no problem at all.

What exactly do I have to do with the JTm45 build to do this? I thought it was taking off the red wire on the filter cap and putting a resistor inbetween?

marT · Post by **marT** » Fri Jul 06, 2007 12:05 am

toner wrote:Did you break into your local Smith's warehouse for those spools? Be honest now!

18 gauge or larger is fine. I can't tell what you have there from the pictures. 16 or 14 gauge is theoretically better but in a low-power guitar amp it's not a big deal.

haha my girlfriends dad is an electrician and I am living with them at the moment, he has lots and lots of spools of various wire. I can't find the exact size of the wire written anywhere but I would say the strands are larger than the 18 guage wire in the kit.

toner · Post by **toner** » Fri Jul 06, 2007 12:24 am

marT wrote:So is forming really not necessary with these new caps?

I have to wait around for my speakers so letting it form for a day is no problem at all.

What exactly do I have to do with the JTm45 build to do this? I thought it was taking off the red wire on the filter cap and putting a resistor inbetween?

I followed Larry's advice on forming filter caps but without a lot of prior experience it's hard for me to tell if it makes a big difference. ?

You may want to start breaking in your sozo's though if you're bored:
http://forum.metroamp.com/viewtopic.php?t=2395

marT · Post by **marT** » Fri Jul 06, 2007 12:35 am

wow I didn't know you could pre break in the sozo's. unfortunately without speakers or dummy load I can't really do it.

toner, can you explain to me what you did with the JTM45 to form them. I have read all the threads on it but I still can't figure out exactly what to do to the JTM45. Do I need a dummy load for cap forming too?

toner · Post by **toner** » Fri Jul 06, 2007 12:45 am

marT wrote:wow I didn't know you could pre break in the sozo's. unfortunately without speakers or dummy load I can't really do it.

Actually, you can. Just remove the power tubes. You don't need speakers or any load (see George's comments in the thread I posted).

marT wrote:toner, can you explain to me what you did with the JTM45 to form them. I have read all the threads on it but I still can't figure out exactly what to do to the JTM45. Do I need a dummy load for cap forming too?

Sorry, I haven't built a 45 yet. I did this on a 100w.

All I can do is refer you to Larry's instructions:
http://forum.metroamp.com/viewtopic.php?t=8396

You may want to PM Larry if you're not sure about something specific to a 45.