[AMRadio] Diathermy tube for Fischer

John Lyles jtml at losalamos.com
Fri Sep 11 12:57:05 EDT 2009

As W7TFO correctly pointed out, Fischer was a long time diathermy 
machine manufacturer. Like others, they had their own OEM part numbers 
printed on their tubes, made by  other companies. My Aloe "Short Wave 
Unit" diathermy device has Amperex A11 triodes in it though. They have 
shorter plates than the Fischer tube you pictured, must be lower power.


> Message: 1
> Date: Thu, 10 Sep 2009 11:17:30 -0700
> From: David Hollander <n7rk at cox.net>
> Subject: [AMRadio] Fischer Transmitting Tube

> I have a tube that I thought was an old Taylor tube.
> Marked on the glass is Fischer Chicago, Illinois and the tube number is 
> 3581. Looks like an 805 but a bit larger.
> Here is a picture.
> http://members.cox.net/radiostuff9/358fisher.jpg
> Anyone ever heard of the Fischer Tube company? A google search turned up 
> nothing.
> Tnx and 73,
> Dave N7RK

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