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Edison 60 with 300B`s

195.159.52.90

Posted on October 31, 2001 at 01:46:32
herman


 
I have wired my Edison 60 in PSE triode mode with EL34 valves. I understand that you can run this amplifier with 300B`s also, and I would like to try this option. The trouble is that I can`t read schematics and I know next to nothing about valve theories. The question is: do I have to take the time to learn all this to be able to read the schematic on Thorsten Loesch` website, or could somebody explain in simple terms which components I have to change on the PCB`s and the PSU (I have one input transformer). I take it I have to change sockets for the 300B`s too, and need to know how to wire them.
Any input on this will be appreciated.

Ps: Will this conversion make any change in the amount of hum/noise?

 

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Re: Edison 60 with 300B`s, posted on October 31, 2001 at 04:09:08
Thorsten
Manufacturer

Posts: 4209
Location: Somewhere nice on planet dirt
Joined: September 25, 1999
Hi,

>I understand that you can run this amplifier with 300B`s also,

You can, but the conversion is considerably more involved than just to change a few components.

> The question is: do I have to take the time to learn all this
> to be able to read the schematic on Thorsten Loesch` website,

I would strongly recommend this, if only to be also able to read the schematic and work out what went wrong if anything does.

> or could somebody explain in simple terms which components I
> have to change on the PCB`s and the PSU (I have one input
> transformer).

One Transformer has not got enough power for the 300B option, sorry.

>Ps: Will this conversion make any change in the amount of hum/noise?

Depends, if you use AC Filaments the hum will be a little higher. With DC Filaments and due to the added choke filtering in the PSU the hum will be much less.

Ciao T

 

Re: Edison 60 with 300B`s, posted on October 31, 2001 at 11:25:07
herman


 
You are right of course, telling me to learn the theory so I can understand what I am doing. My intention is to get a better understanding of amplifier designs and valve theory. With kits you don`t need much of that. I understand that my Edison isn`t suitable for 300B`s, so I think I leave it for now and consentrate on my speaker kit (Hammer Dynamics) arriving (hopefully) any day now. I`m a bit conserned that the small amount of hum in the Edison wil be a problem with a 97db loudspeaker. It may be a better solution to try one of the 300B kits that is offered all over internet. Well, it`s Christmas soon.

Thank you for your answer.

 

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