Hi all,

I picked up a bunch of 6080 yesterday to complete an OTL experiment. All are
branded DUMONT. There is something weird about "some" of them. Some are like
a light
version, a bit smaller in height and very light. Others are taller and
weight almost a half
pound ! The plates are sorta encapsulated with a thick "weight" in lack of a
better description.

Is there such a thing as "commercial" versions and maybe an "industrial" one
?
The light version is dated 7050 the heavy one 76xx. Any enlightment on this
would
be appreciated.

I also picked up a bunch of 1625. Since I also have an 807 amp in the works,
I read the 1625 is an equivalent of the 807. Unfortunately, none of my tube
books offers specs and cross-reference. Is the 1625 a good audio tube to
play with ?
I can paint the plates black if it can help...[grin]

I expect to use 4 or 6 1625 in PPP monoblocks with their own regulated PSU.
Unless someone tells me those are crappy tubes...Or will you let me become
a guinea pig and review the results for you guys ? ;o)

Thanks,
Syl

Syl wrote:

Hi all,

I also picked up a bunch of 1625. Since I also have an 807 amp in the works,
I read the 1625 is an equivalent of the 807. Unfortunately, none of my tube
books offers specs and cross-reference.

Have a look he http://frank.pocnet.net/sheets/049/1/1625.pdf

Is the 1625 a good audio tube to play with ?

I guess it's as good as the 807 :-)

Best regards,

Mikkel C. Simonsen

"Mike Diack" a écrit dans le message

Are you sure the "heavy" ones are not 6336As ?

Nope, says 6080 all right on the tube's base...
Now, if they are printed 6080 (the box too)
and they are in fact 6336A I couldn't tell,
the reason me asking...;o)

The heavy one shows the markings on the base,
the light one, on the tube, but couldn't get the
picture to show. They both are Dumont...

www.oldradioz.com/temp/light_6080.jpg
www.oldradioz.com/temp/heavy_6080.jpg
www.oldradioz.com/temp/heavy_6080_base.jpg


Syl


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"Mikkel C. Simonsen" a écrit dans le message

Is the 1625 a good audio tube to play with ?

I guess it's as good as the 807 :-)

Best regards,

Mikkel C. Simonsen

Thanks for the link Mikkel.

Cool ! At less than a buck each (NOS army box 1944) I think I can use
them by the dozen...-hehehe

Syl


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Screen of a 7027 is tied to pin one as well as the usual pin 4.
That sure causes a problem when you stuff it into a 6L6(metal)
socket where it should otherwise work!!!!
Cheers, John Stewart

Carroll Conklin wrote:

Syl,

You have the graphite (heavy, and probably has a WB, or such, suffix) a=
nd
steel versions of the 6080. The 6080 is the upgrade from 6AS7G.

The 1625 is exactly the same as the 807 except it has a 12.6 Volt heate=
r.
The 807 is 6.3V ;-).

Carroll

"syl" wrote in message
.. .
"Mikkel C. Simonsen" a =E9crit dans le message

Is the 1625 a good audio tube to play with ?

I guess it's as good as the 807 :-)

Best regards,

Mikkel C. Simonsen

Thanks for the link Mikkel.

Cool ! At less than a buck each (NOS army box 1944) I think I can use=

them by the dozen...-hehehe

Syl


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Syl,

You have the graphite (heavy, and probably has a WB, or such, suffix) and
steel versions of the 6080. The 6080 is the upgrade from 6AS7G.

The 1625 is exactly the same as the 807 except it has a 12.6 Volt heater.
The 807 is 6.3V ;-).

Carroll


"syl" wrote in message
.. .
"Mikkel C. Simonsen" a écrit dans le message

Is the 1625 a good audio tube to play with ?

I guess it's as good as the 807 :-)

Best regards,

Mikkel C. Simonsen

Thanks for the link Mikkel.

Cool ! At less than a buck each (NOS army box 1944) I think I can use
them by the dozen...-hehehe

Syl


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