[R-390] bottom 200 kc dead

[John Page]

     My Collins R390A just suddenly developed an odd ,to me, problem. It 
suddenly decided it would not receive anything from X.200kc down. This on 
ALL bands. Really didnt have a clue as where to start as signals from 200kc 
up were great. It was as though you flipped a switch when you tuned below 
200kc on any band. I did check all tubes. Just to try something. All checked 
good. Thought a cam had slipped so I compared it with my stewart Warner 
which works great. All seemed ok.
     Had a occasion to be talking to Jim Garland W8ZR this evening and he 
thought I should check out the PTO. Jim knows his stuff so I went home and 
decided the easiest check was a new PTO tube.
     WOW it works. Old tube still checks good and returning it to the PTO 
brings back the problem So Thanks Jim, you fixed it. Not sure why that 
happens but at this point, who cares.
     Just wanted to share this with the group. Might be some newbys to 390's 
like me on here.
                            John




John Page K4KWM
Hollow State since 1953
(ex W8PKU,N8BLB,NA8O)

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