RE: [Repeater-Builder] Re: Motrac / Solid State Tubes

[Bob Underwood]

There was a brief moment in time in the mid 1970's that
Teledyne made solid-state replacements for the 6AK5 and the 12AT7 called
Fetrons; they were essentially high voltage depletion mode JFETs. The
main customer was the phone company, and when they had replaced all their
tubes, the business dried up. (I was at National Semiconductor at the
time working on a similar device).

I don't think this has anything at all to do with the Motrac radio.

Bob Underwood
AA6BT

At 07:24 PM 3/23/04, you wrote:
The 6DW4 Nuvistor was a vacuum tube
in a metal case, filament, etc. RF amp
used in TV tuner and Sonar FS23 CB Base radio.   Seems like the
solid state
jobs replaced 12AT7, 6U8, etc.

But I may be wrong,

Steve
NU5D







 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    
http://groups.yahoo.com/group/Repeater-Builder/

<*> To unsubscribe from this group, send an email to:
    
[EMAIL PROTECTED]

<*> Your use of Yahoo! Groups is subject to:
    
http://docs.yahoo.com/info/terms/
  













Yahoo! Groups Links

To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ 
To unsubscribe from this group, send an email to:[EMAIL PROTECTED] 
Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.