SS PoS ID

[vintagekiki]

https://music-electronics-forum.com/forum/amplification/guitar-amps/vintage-amps/50096-
Late 60's Early 70's UNICORD Power Plus amp... any info?

https://el34world.com/Forum/index.php?topic=24631.0
Late 60's early 70's Unicord Power Plus guitar amp

[galaxiex]

https://music-electronics-forum.com/forum/amplification/guitar-amps/vintage-amps/50096-
Late 60's Early 70's UNICORD Power Plus amp... any info?

https://el34world.com/Forum/index.php?topic=24631.0
Late 60's early 70's Unicord Power Plus guitar amp

Thanks!

I forgot that I made those posts...

[tbonuss]

Ok, so I got the thing. Evidentally you guys already knew what it was, so do you still want pictures? Perhaps you can understand my confusion...

[Enzo]

I only know what it is from reading the discussion we had in the earlier thread, but speaking for myself, that thread seemed to have pretty full photo coverage.

[galaxiex]

Might be nice to see the guts of yours to see if the head and the combo are the same.
I suspect they are but pics would be nice.
Thanks!

[tbonuss]

Sure.

[galaxiex]

Thanks!

Interesting they used a smaller (shorter) reverb tank compared to my combo amp.
Makes sense tho, there isn't enough room in the head for a full size tank.
In mine the long tank is mounted vertically on the side wall of the cab.

The reverb in mine is absolutely cavernous sounding!
Really nice and almost rivals my Fender Deluxe Reverb.

[vintagekiki]

#21

Thank you!
Nice photos

One ask.
I try to create some approximate idea of schematic based on photo layouts, using various sources where schematic are published..
I ask both owners to write down how many and which transistors were used in the PCB preamp. A vertical PCB I assume is an board for effect (vibrato & reverb), and a small transformer is most likely for reverb.
The JKE-2 is probably a tone color module similar to that used by the Ampeg.
For the power plus Unicord series, I found no clues other than the catalog published by galaxiex, and concluded from the catalog that the Delta has 60W.
Thanks
vk

[bsco]

Unicord marketed Univox. (and USA Marshal)
Interesting history: http://www.vintageunivox.com/history.html

Interesting read there Jazz.....

[tbonuss]

Sure thing VK. Is this helpful, or do you literally just want a list?

[tbonuss]

Thanks!

Interesting they used a smaller (shorter) reverb tank compared to my combo amp.
Makes sense tho, there isn't enough room in the head for a full size tank.
In mine the long tank is mounted vertically on the side wall of the cab.

The reverb in mine is absolutely cavernous sounding!
Really nice and almost rivals my Fender Deluxe Reverb.

I'm pretty sure mine was a conversion. The drywall screws don't seem like something the OEM would have used .
Did you make any kind of schematic?

[tbonuss]

Interesting read there Jazz.....

Wow. This is really fascinating. Thank you for linking that!

[vintagekiki]

#25

Thank you.
The photo you sent is enough to identify whether they are GE or Si transistors.
RCA40329, RCA 2613, RCA 40254 are Germanium Transistors.
This is a sufficient starting point, to try based on the internet schematics, to see if there is any similarity between Unicord and Unicord Power Plus.

[tbonuss]

You're welcome--do you want more pix? Or anything else?

[galaxiex]

I'm pretty sure mine was a conversion. The drywall screws don't seem like something the OEM would have used .
Did you make any kind of schematic?

I did not make a schem for this one, tho I have traced and drawn many other vintage SS "cheap student" amps from the era.

At the time, I got the amp repaired, so I thought I'd not have any real need for a schem.
I could go back in, pull the boards and trace them to make a schem....
... and I probably will at some point...
.... but right now I'm very busy with other "life stuff".... so it may be a while....

Sorry...