[R-390] Re: R390 cooling fan

[Flowertime01 at wmconnect.com]

Fellows,

No we did not run the receivers for years with those silly silver tube 
shields.

We had standing paper orders to take most of those 
silly hot silver tube shields off.

On top of that those hot shields were a full employment opportunity for a 
lot of maintenance men. We sent about an hour a month just looking around in 
rooms to find the receivers by serial number. Then we spent some time looking
into the receiver for blue glows.

Once ever six months the receiver come out of the rack and had all the
tubes pushed through a tube tester.

Those radios did not just run all those years with silver tube shields.
That is some new urban myth.

Roger KC6TRU