Hey guys,

I posted this at Ampage, but maybe everyone is using this site now, so I'll try here:

I've got a Kay 705 that I'm trying to get working. One of the tubes shattered at some point. It says Sylvania 913 MJF on the base.

I was told this amp used a 6l6 and that a 5u4 would be the rectifier. I tried a 5u4 and it blew the tube. :-/ Here is what I know about the tubes from left to right looking at the back of the amp:

There is not a 12at7 like I originally thought. It is a smaller tube. Made by Sylvania and the only marking on it is 909 and APD. I have no idea what this means.

The next tube is a 50L6GT. Not sure if this is related to a 6L6 or not.

There is something that looks like a covered tube, but I can't get the cover off and don't want to break it. Anyone know what it might be?

The final socket is the one I'm trying to find a tube for that fried a 5U4 in a heartbeat (and left my Dual Rectifier lifeless).

Any help is really appreciated. I'm pretty handy around convential amps, but I don't know what these tubes are or where to get them.

Thanks!

Mike

I posted this at Ampage, but maybe everyone is using this site now, so I'll try here:

I've got a Kay 705 that I'm trying to get working. One of the tubes shattered at some point. It says Sylvania 913 MJF on the base.

I was told this amp used a 6l6 and that a 5u4 would be the rectifier. I tried a 5u4 and it blew the tube. :-/ Here is what I know about the tubes from left to right looking at the back of the amp:

There is not a 12at7 like I originally thought. It is a smaller tube. Made by Sylvania and the only marking on it is 909 and APD. I have no idea what this means.

The next tube is a 50L6GT. Not sure if this is related to a 6L6 or not.

There is something that looks like a covered tube, but I can't get the cover off and don't want to break it. Anyone know what it might be?

The final socket is the one I'm trying to find a tube for that fried a 5U4 in a heartbeat (and left my Dual Rectifier lifeless).

Any help is really appreciated. I'm pretty handy around convential amps, but I don't know what these tubes are or where to get them.

Thanks!

Mike

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