[R-390] 3TF7 Failed in service

[G4GJL@aol.com]

Contrary to observations made from time to time by others on the reflector, I 
have had a 3TF7 Ballast fail  WHILST POWERED UP.

The 390A here was powered up, but muted with the break-in facility for a 
period of 4 hours, during which the ballast failed. 

I dont have a spare, and have just undergone abdominal surgery, so I dont 
feel like lifting the rig or working on the rig to make a solid state 
replacement. 

Instead, I made a makeshift repair with a 33ohm and a 10ohm resistor in 
series, jammed into the tube socket on the appropriate pins. 

Dont flame me...it works!

Ill do better when I am!


73

Pete

G4GJL




--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment. Attachments are not allowed.
Please post in Plain-Text only.---