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CJ900RR 22nd February 2009 05:40 PM

ECC 83 + ELL 80 maybe?
I was able to save the parts from an old Philips B8D42AS radio, schematics. It contained some tubes as follows:

2 pcs ELL80
2 pcs EM87
2 pcs ECC808
1 pcs ECC83
1 pcs ECC85
1 pcs EF184
1 pcs ECH81
1 pcs EAF801

After some searching, the ELL 80 is a rare tube, I decided to go with this schematic:

From this website.

Power trafo primary side:

Power trafo secondary side:

Output trafo (pusch-pull):

First, the power-trafo seams to be broken. I hooked it up for 220V operation as stated in the schematic but can only measure 3.8V AC between pin 6 and 8 or 9, and between pin 7 and 8 or 9, everything else give 0V.

So... what do you think. Should I give it a go or do you recommend something else? It will be my first tube-amp if I give it a go...

planet10 22nd February 2009 07:20 PM

Even a single stage of ECC83 is probably too much gain (note that the ECC808 is, i believe, a premium ECC83). Of the tubes you have i'd be tempted to use the ECC85.

Testing well, the ECC83, and ECC808s can likely sell for enuff to help buy parts for the build.


azazello 22nd February 2009 07:48 PM

ECC85 /for preamp for L & R ch./, and ECC83 /fase inv. for L & R ch./.

Yvesm 22nd February 2009 08:49 PM

Hey !

ECC808 + ELL80, go for that:

or one of the numerous variations know here as "Baby Huey" f.e. :

Have fun !


manonon 22nd February 2009 11:19 PM

Why not to restoring the radio?
Is a beautiful receiver, and you keep having the amplifier stage.

Sweden 23rd February 2009 02:21 PM

fun with recycling, is intresant to folow this

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