ECC40/CV3884 as audio tube - opinions?
silvergran
ECC32/CV181
and yet it appears to be totally neglected in the audio world.. Could this
be because of its
uncommon base (B8A) or the fact that there is no US equivalent driving US
designs
or simply because it is not a good audio tube... Any input appreciated.
Ulf Silvergran, Stockholm
Oskari Heinonen
Good question. Why no answers?
Oskari Heinonen, Helsinki/Helsingfors
--
Oskari Heinonen * University of Helsinki * Department of Computer Science
Oskari....@cs.Helsinki.FI * http://www.cs.Helsinki.FI/Oskari.Heinonen/
Eike Lantzsch
> silvergran wrote:
> >
> > This readily available dual triode has electrical properties very
> > close to ECC32/CV181 and yet it appears to be totally neglected in
> > the audio world.. Could this be because of its uncommon base (B8A)
> > or the fact that there is no US equivalent driving US designs or
> > simply because it is not a good audio tube... Any input appreciated.
> >
> > Ulf Silvergran, Stockholm
>
> Good question. Why no answers?
>
> Oskari Heinonen, Helsinki/Helsingfors
>
AFAIK this tube was only used in the cheaper radios and then only
for a while. In my 1961 Telefunken book it already doesn't appear.
So at the end of the fifties it was replaced by the ECC81/82/83
series. I met EF40 and EF40 in quite some consumer radios but
it was considered "outdated" already in the 60ies.
The characteristics make it difficult to replace ECC40 by ECC8x.
So, if you have only a few ECC40 it might not be worth to try
it because you might have to rebuild when the tubes wear out.
About the sound? I really cant remember. Only still know that
my old EF11, EBC11, EL11 radio sounded a _lot_ better than any
stuff that was built with Exx4x and Exx8x series later.
The worst radios were those with the U-series of tubes.
Later ECL86 came up for stereo - that was better.
Of course there were so many design flaws in those radios
due to cost reduction. So you might still be able to make
a nice sounding amp with those ECC40 - just try it!
Regards, Ike
--
. . Eike Lantzsch
<___> CdC 1489 ASUNCION PY
____|\|\ ____ .ooo../
_________\ \_____/ rattle, aim, sting, wait, incorporate
Ron Kremer
wrote:
>
>AFAIK this tube was only used in the cheaper radios and then only
>for a while. In my 1961 Telefunken book it already doesn't appear.
The ECC40 is a dual AF triode. It was used in many Philips amplifier
designs of the early fifties. The B8A socket is its problem as these
are scarce. I have never seen it in "cheaper radios".
There is no direct electrical replacement from the familiar 9 pin
series (ECC81/82/83
>I met EF40 and EF40 in quite some consumer radios but
>it was considered "outdated" already in the 60ies.
Another "undiscovered tube" of excellent quality but with the same
troublesome B*A socket. This tube is identical to the familiar EF86.
They are easily available NOS, so start collecting sockets !
--
Remove X from address when replying
Ron Kremer
ronk...@Xhetnet.nl
'Strive for perfection in everything you do' (Henry Royce)
Ericsson User
The ECC40 was used in a design for a preamp by the, (at least in Sweden very
famous) designer Jan Bellander, it is described in his bok Record playback,
(Grammofon avspelning) written in the late fifties. The book describe how to
design and build a Williamsson amplifier using KT66and 6SN7 and a preamp using
ECC40, it also describe a lot of commercial circuits like Quad, Leak and
others, a real interesting book with a lot of information.
I built the described amplifier as my first preamp project but at that time I
didn't know anything about grounding so I ended up with a very high hum level,
(of course I tried to "improve" the original design, with well known result,
you live and learn.)
If the ECC40 is a good audio tube or not I dont know but Jan Bellander thought
so anyway.
BR Hans
http://www2.gol.com/users/tube/index.html
DEMOSTENES A. Goksøyr
<hans.b...@nrj.ericsson.se> wrote:
>Hello
>
>The ECC40 was used in a design for a preamp by the, (at least in Sweden very
>famous) designer Jan Bellander, it is described in his bok Record playback,
>(Grammofon avspelning) written in the late fifties. The book describe how to
>design and build a Williamsson amplifier using KT66and 6SN7 and a preamp using
>ECC40, it also describe a lot of commercial circuits like Quad, Leak and
>others, a real interesting book with a lot of information.
ECC 40 and EF 40 is very well described in the excellent book by E.
Rodenhuis: Valves for Audio Frequency Amplifiers
EF 40 is identical to EF 86, but ECC 40 does not have any exact
equivalent. It has some similarities to E80CC. This was used by
Japanese audiophiles as a drivervalve. The Rodenhuis book shows many
circuits with ECC 40. As a phase inverter you should get an output of
about 30V RMS at 1.0% distortion.
In my opinion both the EF 40 and the ECC 40 are overlooked valves and
it is well worth trying them. Sockets are really no problem. There is
a very low demand, so in Europe the stocks are good.
(The book, these valves and sockets are available from me. Have a look
at my web site)
Regards,
Arnold Goksøyr
DEMOSTENES - N6899 Balestrand, Norway
Tlf. +47 5769 1340 Fax +47 5769 1267
http://www.demostenes.no
Thousands of different valves in stock as well as
sockets,transformers,books and components.
Kim Pedersen
using ECC40 and EL34. They are modified a lot and they sound fantastic!
A orginal diagram of the Klangfilm:
http://www.audioantik.de/Klangf/KLV502.pdf
Kim Bay
Aarhus, Denmark
"silvergran" <ulf.sil...@telia.com> skrev i en meddelelse
news:2DDY6.8781$G4.12...@newsc.telia.net...
gol...@gmail.com
this is Mahdi Goli from Iran.
i have two origin klangfilm consul discribed as below:
1-KLV-502 include two mono tube block amplifier with ECC40 (3 units) + EL34 (2units) and EZ 34 (rectifier).
may you be so kind and send me the instruction for revising amp. what part must be replaced and any changes in diagram....
2-a klangfilme consul includes 2 units C72392-A262-A7 which is solid state amplifier designed by Siemens .
3- loudspeaker made by klangfilm "Eurodyn / C71233-A6-A1"
i would like to use above mentioned KLV-502 audio set but as you understood it must be modified.
pls help me to do it.
best regards
Dr. Mahdi Goli
Eike Lantzsch, ZP6CGE
> On Thursday, 19 July 2001 23:31:39 UTC+4:30, Kim Pedersen wrote:
> > At the moment I'm using two Siemens Klangfilm V502 (year 1957) monoblocks
> > using ECC40 and EL34. They are modified a lot and they sound fantastic!
> > A orginal diagram of the Klangfilm:
> > http://www.audioantik.de/Klangf/KLV502.pdf
> >
> > Kim Bay
> > Aarhus, Denmark
> >
> > "silvergran" <ulf.sil...@telia.com> skrev i en meddelelse
> > news:2DDY6.8781$G4.12...@newsc.telia.net...
> > > This readily available dual triode has electrical properties very close to
> > > ECC32/CV181
> > > and yet it appears to be totally neglected in the audio world.. Could this
> > > be because of its
> > > uncommon base (B8A) or the fact that there is no US equivalent driving US
> > > designs
> > > or simply because it is not a good audio tube... Any input appreciated.
> > >
> > > Ulf Silvergran, Stockholm
> > >
equipment - mostly German production e.g. Maihak, Telefunken ...
>
> Hi Kim,
> this is Mahdi Goli from Iran.
> i have two origin klangfilm consul discribed as below:
> 1-KLV-502 include two mono tube block amplifier with ECC40 (3 units) + EL34 (2units) and EZ 34 (rectifier).
> may you be so kind and send me the instruction for revising amp. what part must be replaced and any changes in diagram....
> 2-a klangfilme consul includes 2 units C72392-A262-A7 which is solid state amplifier designed by Siemens .
> 3- loudspeaker made by klangfilm "Eurodyn / C71233-A6-A1"
> i would like to use above mentioned KLV-502 audio set but as you understood it must be modified.
> pls help me to do it.
> best regards
> Dr. Mahdi Goli