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4evrnewB
Silver Member

Canada
322 Posts

Posted - 12/11/2007 :  16:54:26  Show Profile  Reply with Quote
A friend of mine is giving me an old combo tube amp. It's called a "Lero" and he thinks it's about 12 - 15W. It uses 2 - 12ax7's and 2 - 6v6's.
Anyway, he says the cab is pretty beat and it needs a new speaker (the original is missing). I know I have to find the right load speaker and I think I can do that, but do you have any recommendations for size? For construction method/ materials for the cabinet? I'd like to make a unique custom amp using the best methods and materials possible!

jack
Platinum Member

USA
1418 Posts

Posted - 12/11/2007 :  19:43:34  Show Profile  Visit jack's Homepage  Reply with Quote
My easy solution for cab building and recycling...Take a busted combo amp, and do this:


to get this:
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pedals 4 pv
Platinum Member

Canada
1351 Posts

Posted - 12/11/2007 :  20:12:48  Show Profile  Reply with Quote
I was going to do that with my old Peavey Bandit, but I decided that it was still to good. I have a rackmount mixer that I was going to put in the space where the amp was, but a rackmount EQ is another good option. Sometimes you can find used rackmount gear cheap, I only paid five bucks for the mixer at a yard sale.
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4evrnewB
Silver Member

Canada
322 Posts

Posted - 12/12/2007 :  15:29:52  Show Profile  Reply with Quote
Folks~
I've been offered a brand new 12" Celestion for this amp but it;s 16 ohm/ 75 watts...I'm guessing I can't use this?...
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Dr. Bob
Moderator

Australia
6593 Posts

Posted - 12/12/2007 :  15:55:37  Show Profile  Visit Dr. Bob's Homepage  Reply with Quote
quote:
Originally posted by 4evrnewB

Folks~
I've been offered a brand new 12" Celestion for this amp but it;s 16 ohm/ 75 watts...I'm guessing I can't use this?...



Hi 4evrnewB

Does the amps output transformer have more than one speaker impedance tap.

A lot of of old valve amps have multiple impedance taps,
if it does, see if they are marked in any way 4-8-16 or 8 & 16

As 8 & 16 Ohms was very common on old amps.
Sometimes they marked the 16 ohm tap 15, similar thing.

Regards & Good luck with he Celestion.

Regards Dr. Bob
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timbo
Silver Member

Australia
252 Posts

Posted - 12/12/2007 :  23:34:00  Show Profile  Reply with Quote
lmao jack! great idea though.
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DeFrag
Moderator

USA
3409 Posts

Posted - 12/13/2007 :  07:06:14  Show Profile  Visit DeFrag's Homepage  Click to see DeFrag's MSN Messenger address  Reply with Quote
quote:
Originally posted by pedals 4 pv

I was going to do that with my old Peavey Bandit, but I decided that it was still to good. I have a rackmount mixer that I was going to put in the space where the amp was, but a rackmount EQ is another good option. Sometimes you can find used rackmount gear cheap, I only paid five bucks for the mixer at a yard sale.



You STILL could do that to your Bandit. Solder in & mount a 1/4" jack to your speaker lugs & you can keep the combo & run the speaker as an open-backed cab too! (Just not at the same time). Versatile no? Easy as pie as well.
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pedals 4 pv
Platinum Member

Canada
1351 Posts

Posted - 12/13/2007 :  07:19:54  Show Profile  Reply with Quote
If only it had a 16ohm speaker instead of 8ohm speaker I would have done it in a similar fashion. When my new cab arrives with the 16ohm speaker arrives, I plan on adding a jack to the amp speaker so I can have the combo, or the cab, or both. This should give me a chance to compare the celestion to the peavey blue marvel as well.
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