[Boatanchors] SWEEP TUBES AND FPM 300S

[Jim Liles]

HMMM --- a two way radio.  Aren't those the ones that one end is mobile and 
sits in a 140 degree car in the summer and -20 in winter all the while 
bouncing around delivering pizza?

Sure is a lot to expect from a radio.  Also how many TV's used phenolic 
boards?

General Electric commercial always was a shlubby outfit --- uh or were they. 
Didn't this start out with junky sweep tubes???  Guess you can find 
something to complain about if you lift all the carpets with a white glove. 
Found a roll of 20's under a carpet at Grampas house once.  Gave em to 
Grandma and did Grampa catch hell.

I always found a tall glass of Brandy results in an attitude adjustment ---  
at least for me it does.

Kindest regards and a great day  Jim K9AXN


-----Original Message----- 
From: Glen Zook via Boatanchors
Sent: Tuesday, January 12, 2016 7:55 PM
To: Rob Atkinson ; Robert Nickels
Cc: Boat Anchors List
Subject: Re: [Boatanchors] SWEEP TUBES AND FPM 300S

In the early 1960s, General Electric had, in their two-way radio series, the 
Pacer and Accent radios better known as the "Pooper" and "Accident".  These 
radios were built on a single phenolic circuit boards and were primarily 
tube-type units.


Those units were problematic from day one!  The circuit board was supported 
only at the corners and, often, if the vehicle hit a bump, the circuit board 
would flex and then break into two-pieces!  The "fix" was to repair all of 
the broken printed circuits with wire jumpers and then to put several layers 
of cardboard between the bottom of the cabinet and the circuit board.


In addition, the copper printed circuits would often, because of the heat of 
the tubes, come loose from the phenolic board and that, of course, caused 
problems.

Needless to say, these radio were NOT popular with two-way radio 
technicians.  Also, very few examples have survived because they were 
immediately thrown away when a replacement was had.


Glen, K9STH
Website: http://k9sth.net


      From: Rob Atkinson <ranchorobbo at gmail.com>

Bob,

Vacuum tubes mounted on phenolic pc boards?  Seriously?  I happen to
like reliability and long life free of avoidable crapouts.  Life is
too short.  Have fun...I guess.


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