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Old 22nd February 2009, 05:40 PM   #1
CJ900RR is offline CJ900RR  Sweden
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Default 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:

Click the image to open in full size.

From this website.

Power trafo primary side:

Click the image to open in full size.

Power trafo secondary side:

Click the image to open in full size.

Output trafo (pusch-pull):

Click the image to open in full size.

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...
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Old 22nd February 2009, 07:20 PM   #2
frugal-phile(tm)
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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.

dave
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Old 22nd February 2009, 07:48 PM   #3
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ECC85 /for preamp for L & R ch./, and ECC83 /fase inv. for L & R ch./.
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Old 22nd February 2009, 08:49 PM   #4
Yvesm is offline Yvesm  France
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Hey !

ECC808 + ELL80, go for that:
http://www.dissident-audio.com/PP_ECL86/Page.html

or one of the numerous variations know here as "Baby Huey" f.e. :
EL84 Amp - Baby Huey

Have fun !

Yves.
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Old 22nd February 2009, 11:19 PM   #5
manonon is offline manonon  Spain
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Default restoring?

Why not to restoring the radio?
Is a beautiful receiver, and you keep having the amplifier stage.
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Old 23rd February 2009, 02:21 PM   #6
Sweden is offline Sweden  Sweden
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Hello
fun with recycling, is intresant to folow this
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