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secretsoundz
08-01-2012, 09:23 AM
I just picked up this super rare Univox bass amp from 1971. It uses a quad of 6550's, two 12AX7's and one 12AU7. It's 150 watts- really loud and punchy! Sounds killer for both bass and guitar. Has anyone seen one of these before?

http://i103.photobucket.com/albums/m157/secretsoundz/UnivoxU1561.jpg

http://i103.photobucket.com/albums/m157/secretsoundz/univox_zeppelin.jpg

k.rock!
08-01-2012, 09:44 AM
the Led Zep stamp kills!! Congrats man! Looks like a really cool amp

-K

secretsoundz
08-01-2012, 09:46 AM
Thanks man, it's a cool find!

Trout
08-01-2012, 09:50 AM
I have the guitar version U1511, same deal, quad of 6550's cranking out 150W. Mine has reverb and tremolo.

I have ruined about every speaker cab I ever used with it. Biggest cleans ever, but not much for overdriven tones without a pedal!
Darn things are as heavy as it gets, those transformers are massive!

secretsoundz
08-01-2012, 10:11 AM
Very cool! You're right, they are heavy bastards....

You're right about the clean headroom...this thing will take your head off before it starts to breakup. I've been running pedals through it. Man, my Earthquaker Devices Hoof fuzz sound absolutely massive through it!

ROKY
08-01-2012, 12:03 PM
I'll have to keep my eyes out for one of these .

chillerthanmost
08-01-2012, 02:27 PM
The one that Led Zeppelin used and in the ad you posted is the UX1501 which is an awesome amp and pretty rare. Different than the one you picked up, though, that's still a good little amp. Hope you like it.

epluribus
08-01-2012, 02:34 PM
Boy, looks like it's in terrific shape! Nice find. :beer

--Ray

secretsoundz
08-01-2012, 07:47 PM
The one that Led Zeppelin used and in the ad you posted is the UX1501 which is an awesome amp and pretty rare. Different than the one you picked up, though, that's still a good little amp. Hope you like it.

Very cool, thanks for the info. It sounds like he briefly used the UX1501 in 1972. From what little info I've found it sounds like the amp I have and the UX1501 were made in 1971-72.

I wonder how many of these were made...doesn't sound like the series was around for very long...

chillerthanmost
08-01-2012, 10:22 PM
Very cool, thanks for the info. It sounds like he briefly used the UX1501 in 1972. From what little info I've found it sounds like the amp I have and the UX1501 were made in 1971-72.

I wonder how many of these were made...doesn't sound like the series was around for very long...

Yeah, they UX1501 was only made for a short period between those years. I don't know how true it is, but from the info I've read there is supposedly only around a dozen of them left. I picked mine up last year and it's in pretty damn good shape. Definitely a sweet amp.

Your model, I haven't looked into to much. But probably around that same time. I'm not sure if yours is Japanese made or made in U.S. like the UX line. Post some more pics. Have you opened it up and looked at the wiring? Point to point? The back should say if it's made in New Jersey or Japan.

esoteric pete
08-01-2012, 10:34 PM
nice score! you dont see many of those..

secretsoundz
08-01-2012, 11:00 PM
Yeah, they UX1501 was only made for a short period between those years. I don't know how true it is, but from the info I've read there is supposedly only around a dozen of them left. I picked mine up last year and it's in pretty damn good shape. Definitely a sweet amp.

Your model, I haven't looked into to much. But probably around that same time. I'm not sure if yours is Japanese made or made in U.S. like the UX line. Post some more pics. Have you opened it up and looked at the wiring? Point to point? The back should say if it's made in New Jersey or Japan.

Nice score with your UX1501, it sounds like they are ultra rare. My U1561 doesn't say if it was made in NJ or Japan on the back, it just has the model name and the serial number. It's a mix of PCB and handwiring, here's a pic:


http://i103.photobucket.com/albums/m157/secretsoundz/Univox1561guts.jpg

chillerthanmost
08-01-2012, 11:55 PM
Looks great.

AXXA
08-02-2012, 12:32 AM
Cool! I have been scanning CL for Univox amps. They tend to be cheap, but its hard to figure out which models are the best without trying them. Univox sure put out a lot of different amps, among other things. I had a matching sunburst Hi-Flyer guitar and bass when I was younger, which I miss despite their quirkiness.

Trout
08-02-2012, 06:07 AM
Nice score with your UX1501, it sounds like they are ultra rare. My U1561 doesn't say if it was made in NJ or Japan on the back, it just has the model name and the serial number. It's a mix of PCB and handwiring, here's a pic:


http://i103.photobucket.com/albums/m157/secretsoundz/Univox1561guts.jpg

Curious,
What is the number on the circuit board?
I know they used the same board in several models.
Mine, even though it is a B-Group 150W uses the same board as the 1010/1011 with only a couple value changes.

secretsoundz
08-02-2012, 08:48 AM
Curious,
What is the number on the circuit board?
I know they used the same board in several models.
Mine, even though it is a B-Group 150W uses the same board as the 1010/1011 with only a couple value changes.

I checked it out! It says "U-1061" in the lower right hand corner of the PCB...

The U-1061's use the same tube layout as my U-1561 except for the power section. The U-1061 has a quad of 6L6GC's instead of 6550's.

Trout
08-02-2012, 02:25 PM
I checked it out! It says "U-1061" in the lower right hand corner of the PCB...

The U-1061's use the same tube layout as my U-1561 except for the power section. The U-1061 has a quad of 6L6GC's instead of 6550's.

Yep, that makes sense actually and it was common practice of their designers as well.

FFTT
08-02-2012, 02:34 PM
Careful handling the preamp tubes.

I found a pair of IEC Mullards in the non working Univox
a friend gave me.

The printed logo on old Mullards will rub right off with the slightest
touch

secretsoundz
08-02-2012, 03:15 PM
Careful handling the preamp tubes.

I found a pair of IEC Mullards in the non working Univox
a friend gave me.

The printed logo on old Mullards will rub right off with the slightest
touch

Thanks for the heads up! Yup, mine was loaded with Mullards in the preamp section. Sadly, they were hammered and quite microphonic so I had to replace them.

Animalboy71
10-30-2012, 12:38 PM
I've been trying to get my hands on one of these for a couple years now! I love how they make their 2x12 cabs with the holes in the front.

guitarcapo
10-30-2012, 02:04 PM
Here's a 105 watt Univox head that seems to have been for sale on Ebay for 10 months with no takers:

http://www.ebay.com/itm/VINTAGE-UNIVOX-1011-LEAD-GUITAR-AMP-HEAD-EARLY-1970s-GOOD-USED-CONDITION-/170742183088

$450 plus $65 shipping

sliberty
10-30-2012, 03:40 PM
I bought a U1086 for under $200 a bunch of years ago. It is the blue on blue PA head. It sounded too sterile (it as meant as a PA after all)', so I gutted it and built a Trainwreck into the chassis and cab. But the bass amps, and even the guitar amps are cool. Only problem is the circuit boards - knd of cheap PCBs that are hard to mod or maintain. But if it is working well, enjoy it.

I haven't seen the black cab and blue pael combination before....

chillerthanmost
10-30-2012, 05:18 PM
I bought a U1086 for under $200 a bunch of years ago. It is the blue on blue PA head. It sounded too sterile (it as meant as a PA after all)', so I gutted it and built a Trainwreck into the chassis and cab. But the bass amps, and even the guitar amps are cool. Only problem is the circuit boards - knd of cheap PCBs that are hard to mod or maintain. But if it is working well, enjoy it.

I haven't seen the black cab and blue pael combination before....

My Univox is ptp handwired ;)